Search results

1

Open access resources on motion artifact in adult dentomaxillofacial CBCT: illustrated pictorial review of medical literature

100%

Olszewski R.

|

issue 1

1-37

EN

Objective: to know how much open access/open knowledge reference figures were available on motion artifacts in CBCT dentomaxillofacial imaging, and to describe and to categorize clinical variation of motion artifacts related to diverse types of head motion retrospectively observed during CBCT scanning time. Material and methods: a search equation was performed on Pubmed database. We found 56 articles. The 45 articles were out of scope, and 7 articles were excluded after applying exclusion and inclusion criteria. Only 4 articles were finally freely accessible and selected for this review. Moreover, we retrospectively used our department CBCT database to search examinations with motion artifacts. We also checked retrospectively for radiological protocols as the type of motion artifact was described when occurred during the CBCT scanning time by the main observer. We had obtained the approval from the Ethical committee for this study. Results: The accessibility of free figures on motion artifact in dentomaxillofacial CBCT is limited to 13 figures not annotated, and to one annotated figure presenting a double contour around cortex of bony orbits. We proposed to categorize the motion artifacts into three levels: low, intermediary, and major. Each level was related to: 1) progressive image quality degradation, 2) distortion of anatomy, and 3) potential possibility of performing clinical diagnosis. All 45 figures were annotated. Conclusions: There exists a scarce open access literature on motion artifacts in CBCT. In our pictorial review we found that low level motion artifacts were more related to head rotation in axial plane (rolling). Rolling and lateral translation were responsible of intermediary level motion artifacts. Major level motion artifacts were created by complex motion with multiple rotation axes, multiple translation directions, and by anteroposterior translation. The main limitation of this study is related to retrospectively report empirical observation of patient motion during CBCT scanning and to compare these observations with motion artifacts found on clinical images. More robust methodology should be further developed using a virtual simulation of various types of head movements and associated parameters to consolidate the open knowledge on motion artifacts in dentomaxillofacial CBCT.

2

Artifacts related to cone beam computed tomography technology (CBCT) and their significance for clinicians: illustrated review of medical literature.

100%

Olszewski R.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2020

|

vol. 11

|

issue 1

1-29

EN

Objective: to explain the meaning and to illustrate technical artifacts (aliasing as well as the ring artifact) and beam hardening (metal artifact) that can be present in the dentomaxillofacial cone beam computed tomography (CBCT), and to check the accessibility of free illustrations of these artifacts in medical publications. Material and methods: One observer applied five search equations using database PubMed. The exclusion criteria were: experimental studies, animal studies, studies not related to dentomaxillofacial area, and articles with closed access. There was no time limit for the search of articles. We limited our search to English and French language. Results: Only 3 articles out of 434 publications were retained after application of inclusion/exclusion criteria. In these articles only 4 annotated figures were freely accessible in medical publications from PubMed. In this paper we presented examples of aliasing, ring artifact, and beam artifacts from I-CAT, Carestream 9000 3D (Kodak), and Planmeca Promax 3D Mid CBCT. The intensity of beam hardening artifact varies from major degradation of image (i.e., subperiosteal implants, bridges, crowns, dental implants, and orthodontic fix appliances), through mean degradation (screws securing titanium mesh, head of mini-implant) to no beam hardening on metallic devices (orthodontic anchorage, orthodontic contention wire) or on dense objects (endodontic treatments, impression materials, Lego box). Some beam hardening artifacts arising from nasal piercing, hairs, or hearing aid device may be present on the image but they will not disturb the evaluation of the field of view. Conclusions: reduction of aliasing artifact is related with the improvement of detectors quality. The presence of ring artifact means that CBCT device has lost its calibration. The field of view (FOV) needs to be reduce in order to avoid scanning regions susceptible to beam hardening (e.g., metallic restorations, dental implants). Finally, the accessibility to open knowledge on technique -related CBCT artifacts seems extremely limited when searching at PubMed database.

3

Accessibility to the knowledge on anatomical variations from dentomaxillofacial CBCT

64%

Olszewski R., Hebda A.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2020

|

vol. 10

|

issue 1

1-19

EN

Objective: to investigate the accessibility of open access article on anatomical variations described on cone beam computed tomography (CBCT) using PubMed database. We wanted to investigate how many journals are sharing articles without pay-wall and how many are sharing articles without author publication charges. Material and methods: a search equation was designed with exclusion criteria limiting the search in PubMed to articles published in English and French. The search was performed by one observer. We had found 2228 articles; among them 709 were accessible as ‘full text’. After applying exclusion criteria and after full text reading only 50 articles remained for the review. Results: the 50 selected articles shared 306 annotated (visual marking, explanation like arrows) and 432 not annotated figures with the public. The 76% of articles were single studies on one specific topic. The main topic was endodontics with 22 articles. 28 journals from all continents participated in the effort of sharing of figures on anatomical variations from CBCT. However, only 2 journals were completely free of charges for authors and readers. Conclusions: we have found only 15 annotated and 3 not annotated figures in 2 articles published in 2 different open access journals (without reader pay-wall and without author publication charges). Sharing the knowledge on anatomical variations from dentomaxillofacial CBCT represents an exception in dental literature.

4

Déplacement accidentel de la dent de sagesse maxillaire dans le vestibule jugal antérieur

64%

Fathi S., Olszewski R.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2021

|

vol. 16

|

issue 1

1-13

EN

Accidental displacements of the wisdom teeth of the upper jaw to various anatomical regions are rare. We systematically searched the literature on this issue using PubMed and DOAJ. There is no freely available illustration for the accidental displacement pathways of the upper wisdom teeth imaged by CT scan or by CBCT apart from displacement towards the infra-temporal, and the pterygopalatine fossa. We describe and illustrate by CBCT a unique case in the medical literature of accidental displacement of the wisdom tooth germ of the upper jaw into the anterior jugal space. The potential reasons, consequences and ways to prevent this rare complication of wisdom tooth extraction are also explained.

FR

Les déplacements accidentels des dents de sagesse du maxillaire supérieur dans divers régions anatomiques sont rares. Nous avons effectué la recherche de littérature sur ce sujet de manière systématique en utilisant PubMed et DOAJ. Il n’existe pas d’illustration accessible gratuitement pour les voies de déplacements accidentels des dents de sagesse supérieurs imagées par le CT scan ou par le CBCT à part le déplacement vers la fosse infra-temporale et vers la fosse ptérygopalatine. Nous décrivons et illustrons par CBCT un cas unique dans la littérature médicale de déplacement accidentel du germe de la dent de sagesse du maxillaire supérieur dans l’espace jugal antérieur. Les raisons potentielles, les conséquences ainsi que les moyens de prévention de cette rare complication d’extraction de dents de sagesse sont aussi expliquées.

5

Carpenter syndrome: cone beam computed tomography pictorial review

64%

Delroisse A., Olszewski R.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2022

|

vol. 22

|

issue 1

1-15

FR

Objectifs de travail: Evaluer la région dento-alvéolaire chez un patient pédiatrique atteint d'un très rare syndrome de Carpenter ou d'acrocéphalopolysyndactylie de type II à l'aide de la tomodensitométrie volumique à faisceau conique (CBCT). Cas clinique: Nous avons retrouvé une oligodontie syndromique, une transmigration canine supérieure et une agénésie exceptionnelle des quatre incisives latérales. Nous avons également décrit le quatrième cas dans la littérature d'une seule incisive inférieure solitaire sur la ligne médiane, et le premier cas jamais illustré sur CBCT. Conclusions: Nous avons proposé et illustré l'utilisation du système de numérotation progressive des dents sur des vues axiales CBCT pour mieux comprendre les situations cliniques dentaires complexes telles que l'oligodontie syndromique.

EN

Objective: To describe dentoalveolar findings in one pediatric patient with a very rare Carpenter syndrome or acrocephalopolysyndactyly type II, and using cone beam computed tomography (CBCT). Case report: We found a syndromic oligodontia, upper canine transmigration, and an exceptional agenesis of four lateral incisors. We also described the fourth case in the literature of a single solitary lower incisor on the midline, and the first case ever illustrated on CBCT. Conclusions: We proposed and illustrated the use of the system of progressive numbering of teeth on CBCT axial views to better understand complex dental clinical situations such as syndromic oligodontia.

6

Dental use of cone beam computed tomography in pediatric embolized arteriovenous maxillofacial malformation

64%

Olszewski R., Theys S.

|

EN

Objective: Pediatric facial arteriovenous malformations (AVMs) are rare but can cause potentially fatal hemorrhages during dental procedures and oral surgery. In this article we present a systematic review of the medical open access literature on pediatric facial AVM. Case report: We illustrate our purpose with clinical dental use of cone beam computed tomography (CBCT) in pediatric embolized facial AVM to define the presence and the position of the right upper impacted canine. Conclusions: We advocate the use of CBCT as additional imaging tool in the follow-up of pediatric dentomaxillofacial AVM, and for depiction of dentoalveolar structures that are inaccessible by conventional dental radiography.

7

Jael’s syndrome: knife blade impacted in the facial skeleton: an illustrated case report and a review of literature

64%

Massaad J., Olszewski R.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2022

|

vol. 24

|

issue 1

1-42

EN

Objective: This article focuses on the penetrating trauma of the facial mass caused by the knife with retention of the blade fractured in the facial skeleton. Case report: We describe preoperative, intra-operative and post-operative outcomes of the knife stabbing in the face, and of the surgical removal of the broken 8cm long blade using two dimensional, and tridimensional computed tomography, and clinical iconography Conclusions: We provide the readership with a broader perspective on iatrogenic facial trauma caused by blades with examples from history of medicine, with biomechanical focus, as well as a review of literature on the management, and on the surgical treatment outcomes of such infrequent emergency in maxillofacial surgery.

8

Cone beam computed tomography (CBCT) in pediatric dentistry

64%

Theys S., Olszewski R.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2022

|

vol. 25

|

issue 1

1-43

EN

Objective: The aims of this systematic review of the literature were to investigate the uses of cone beam computed tomography (CBCT) in pediatric dentistry and, if possible, identify the indications. Material and methods: A literature search was conducted using the PubMed and Scopus electronic databases and the keywords "CBCT and pediatric dentistry". This search provided us with 1518 references. The selected publications were all clinical articles written in French or English and referring to a pediatric population. After screening, 461 eligible full text articles remained. Results: In total, there were 169 references that met the inclusion criteria. Different topics, mainly relating to orthodontics, anatomy, and cleft lips and palate, were discussed. There was large variability in the information concerning the technical parameters. The radiographic protocols that we analyzed showed a large heterogeneity. Conclusions: The level of evidence provided by our work is limited because only two randomized double-blind controlled studies are included. Two indications can be distinguished: for orthodontics and for the rehabilitation of cleft lips and palate. There are a multitude of radiographic protocols. More research is needed to identify other potential clinical indications as well as to determine a standard CBCT protocol for children and adolescents.

9

Complications in surgically assisted rapid maxillary expansion: a systematic review of the medical literature

64%

Olszewski R., Wisniewski M.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2019

|

vol. 8

|

issue 1

20-20

EN

Our aim was to perform a systematic open-access review of various complications reported for surgically assisted rapid maxillary expansion (SARME) procedures. There were 37 articles found in Pubmed using the search equation. Twelve articles were initially excluded according to the exclusion criteria. The 25 remaining articles were read in full for their descriptions of complications related to the SARME procedure in mature patients. The main reversible complications of SARME were infection, postoperative pain, and bleeding. There were also complications related to distractors, to secondary surgeries, and pterygomaxillary junction. The main non-reversible complications of SARME were associated with teeth, periodontal bone loss, and skull base fractures. Large field-of-view cone beam computed tomography (maxilla and skull base) should be implemented as initial planning tool to prevent many potential complications. The current trend for “minimally invasive” surgery in SARME might be, from an ethical point of view, transformed onto “minimally complicated” surgery as complication is still more harmful for any given patient than any potential perioperative surgical invasiveness.

10

Pathologies osseuses des maxillaires récidivantes

64%

Olszewski R., Reychler H.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2018

|

vol. 1

|

issue 1

1-47

EN

Maxillofacial bone diseases represent a heterogeneous group involving benign and malign tumors, and metabolic, malformative, and infectious diseases. They have a tendency to relapse even with a good initial treatment. Therefore, we need to start with active surveillance based on medical imaging (CT scanner). The treatment of maxillofacial bone diseases is based mainly on clinical examination, radiological findings, and pathological diagnosis. The treatment consists of curettage or maxillary/mandibulary interruptive or not-interruptive bone resection. Development of guidelines seems impossible due to the heterogenicity of clinical presentations. The individualized treatment should prevail.

FR

Plusieurs pathologies osseuses des maxillaires ont comme caractéristique une tendance à la récidive, et ce même après un traitement approprié. Il convient donc de les reconnaître afin de pouvoir les surveiller, à la fois cliniquement et par une technique d’imagerie appropriée. On distinguera ici des pathologies tumorales bénignes et malignes, métaboliques, malformatives et infectieuses. Actuellement, le CT scan est la technique d’imagerie médicale de premier choix pour établir le diagnostic différentiel et permettre la surveillance de ces pathologies osseuses. Le traitement de ces pathologies récidivantes est soit le curetage/énucléation si possible (corticales non rompues) soit une résection interruptrice ou non des maxillaires ou de la mandibule, et ce en fonction des données cliniques et surtout anatomopathologiques à discuter et envisager au cas par cas, la généralisation dans ce domaine étant impossible voire dangereuse pour le patient. Il ne peut donc être question de proposer des recommandations ni des algorithmes décisionnels.

11

Quality assessment of instructions for authors in dental, oral and maxillofacial journals

52%

Hebda A., Odri G. A., Olszewski R.

|

issue 1

18-18

EN

Objective: to develop and test inter-observer reproducibility of instructions for authors quality rating (IAQR) tool measuring the quality of instructions for authors at journal level for a possible improvement of editorial guidelines.Material and methods: instructions for authors of 75 dental and maxillofacial surgery journals were assessed by two independent observers using assessment tool inspired from AGREE with 16 questions and 1 to 4 points scale per answer. Two observers evaluated the instructions of authors independently and blind to impact factor of a given journal. Scores obtained from our tool were compared with “journal impact factor 2013”. Results: IAQR presented with an excellent interobserver reproducibility (κ= 0.81) despite a difference in data distribution between observers. There existed a weak positive correlation between IAQR and “journal impact factor 2013”. Conclusions: The IAQR is a reproducible quality assessment tool at the journal level. The IAQR assess the quality of instruction for authors and it is a goodstarting point for possible improvements of the instructions for authors, especially when it comes to their completeness. Nemesis relevance: 28% of dental and maxillofacial journals might revise their instructions for authors to provide more up-to-date version.

12

Cytotoxicity of three-dimensional paper-based models from a three-dimensional paper-based printer

52%

Kozakiewicz M., Szymor P., Olszewski R.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2018

|

vol. 3

|

issue 1

1-15

FR

Objectif: Notre étude consistait à déterminer s'il était possible d'utiliser en salle d'opération des modèles tridimensionnels (3D) issus d’une imprimante tridimensionnelle utilisant du papier. Pour cela nous avons testé l'influence de différents types de stérilisation sur les modèles ainsi que la cytotoxicité des modèles imprimés en papier. Matériel et méthodes: 30 cubes divisés en trois groupes ont été utilisés pour vérifier la stabilité de la forme après la stérilisation. Chaque groupe a été stérilisé avec: l’oxyde d'éthylène à 55˚C, peroxyde d’hydrogène à 60˚C et irradiation aux rayons gamma à 21˚C, 25kGy. Chaque cube a été mesuré avec un pied à coulisse trois fois avant et trois fois après la stérilisation. La signification statistique a été établie à p< 0.05. Soixante cylindres, divisés en trois groupes, ont été utilisés pour les tests de cytotoxicité. Trois de ces groupes ont été couverts, avant la stérilisation, avec du 2-octyl-cyanoacrylate. Chaque groupe a été stérilisé avec une des méthodes de stérilisation décrite ci-dessus. La cytotoxicité a été testée en utilisant des fibroblastes dermiques humains adultes normaux. La survie des cellules a été testée en utilisant la spectrophotométrie avec XTT. L’observation a été réalisée avec le microscope à fluorescence Olympus GX71. Résultats: Il n’y avait pas de différence significative dans les dimensions des cubes avant et après la stérilisation et ce pour les trois méthodes de stérilisation. Avec l’analyse XTT tous les échantillons ont démontré une cytotoxicité supérieure par rapport à une culture de fibroblastes dermiques humains adultes normaux de contrôle. L’analyse statistique ANOVA a confirmé que l’enrobage avec du 2-octyl cyanoacrylate des modèles papier améliorait le comportement biologique du matériau. Cet enrobage réduisait la cytotoxicité du modèle indépendamment de la méthode de stérilisation. Conclusions: les modèles 3D à base du papier 3D issus de l’imprimante Mcor Technology Matrix 300 peuvent être utilisés dans la salle d’opération seulement s’ils sont enrobés avec la colle biologique à base de cyanoacrylate. Rapport avec Nemesis: Nous n’avons pas trouvé de différence significative des dimensions des cubes avant et après la stérilisation indépendamment de la technique de stérilisation utilisée. Les modèles 3D à base du papier présentent une haute cytotoxicité cellulaire sans enrobage.

EN

Objective: Our study aimed to determine the possibility of using models created with a low-cost, paper based 3D printer in an operating room. Therefore influence of different methods of sterilization on models was tested and cytotoxicity of generated models was determined. Material and methods: 30 cuboids divided into three groups were used for verification of shape stability after sterilization. Each group was sterilized either with: Ethylene oxide in temperature 55˚C, Hydrogen peroxide gas plasma in temperature 60˚C or Gamma irradiation at 21˚C, 25kGy. Each cuboid was measured using calliper three times before and three times after sterilization. Results were analysed statistically in Statgraphics Plus. Statistical significance was determined as p< 0.05. Sixty cylinders divided into six groups were used for cytotoxicity tests. Three of those groups were covered before sterilization with 2-octyl-cyanoacrylate. Each group was sterilized with one of the previously described methods. Cytotoxicity was tested by Nanostructural and Molecular Biophysics Laboratory in Technopark Lodz using normal adult human dermal fibroblasts. Survival of cells was tested using spectrophotometry with XTT and was defined as ratio of absorbency of tested probe to absorbency of control probe. Calcein/Ethidium dyeing test was performed according to LIVE/DEAD Viability/Cytotoxicity Kit protocol. Observation was done under Olympus GX71 fluorescence microscope. Results: There was no statistically significant difference for established statistical significance p=0.05 in cuboids dimensions before and after sterilization regardless of sterilization method. In XTT analysis all samples showed higher cytotoxicity against normal, human, adult dermal fibroblast culture when compared to positive control. ANOVA statistical analysis confirmed that 2-octyl cyanoacrylate coating of paper model improved biological behaviour of the material. It decreased cytotoxicity of the model independently of sterilization method. In calcein/ethidium dyeing test due to the high fluorescence of the background caused by cylinders of analysed substance it was impossible to perform the exact analysis of the number of marked cells. Conclusions: Acquired results allow to conclude that Mcor Technology Matrix 300 3D paper-based models can be used in operating room only if covered with cyanoacrylate tissue adhesive. Nemesis relevance: We found no statistically significant difference in cuboids dimensions before and after sterilization regardless of sterilization method. Three-dimensional paper-based models present with high cytotoxicity without coating.

13

Diagnostic value of cone beam computed tomography in complex and compound odontomas: a systematic review and open classification matrix

45%

Dubron K., Gurniak A., Gurniak E., Politis C., Olszewski R.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2022

|

vol. 23

|

issue 1

1-50

EN

Objective: Firstly, this review aims to analyse the recent literature about three-dimensional (3D) diagnostic imaging in complex and compound odontomas and compare it to two-dimensional (2D) imaging. Panoramic radiographs help to evaluate the vertical position of odontomas, and occlusal radiographs are used to evaluate the proximity to adjacent teeth. However, cone beam computed tomography (CBCT) can offer volumetric images, and therefore, a more accurate three-dimensional analysis. Secondly, this research aims to construct an open classification matrix for complex and compound odontomas for dentomaxillofacial CBCT radiology protocols based on a systematic literature review. Material and methods: Two systematic literature searches were conducted in PubMed (Medline), on 2 February 2022 concerning classification systems, and on 5 February 2022 concerning CBCT images. Results: In total, these searches revealed 391 papers by reviewing the databases mentioned above. Six articles were selected for inclusion on classification of odontomas and 13 articles were found on CBCT imaging. Consequently, the construction of an open classification matrix for compound and complex odontomas for dentomaxillofacial CBCT radiology protocols was performed using these 19 articles. Conclusions: CBCT offers a more precise position and accurate diagnosis of complex and compound odontomas compared to 2D imaging. Consequently, it enhances the detailed view of the site (multiple or unique), location (intraosseous, partially or completely extragnathic), size, extension (bony expansion, thinning or perforation cortical bone), density and type (denticulo type, particle type, denticulo-particle type, denticulo-amorphous type, amorphous tissue), relationship (with the crown or root of the definitive tooth), adjacent teeth resorption (deciduous or definitive), adjacent teeth (retention or impaction), and distance with adjacent structures (inferior alveolar nerve, sinus maxillaris), as well as adequate surgical planning. Moreover, this research presents an open classification matrix for the most complete description of compound and complex odontomas when analysing CBCT imaging.

14

Revue illustrée des principales indications de CBCT en orthodontie.

45%

Olszewski R., Theys S., Perez E., Wisniewska K., Wisniewski M.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2020

|

vol. 12

|

issue 1

1-15

EN

This illustrated article is reviewing currently accepted and recommended indications for use of cone beam computed tomography (CBCT) in orthodontics. We present CBCT of teeth anomalies, impacted canines, supernumerary teeth, troubles of teeth eruption, and external roots resorption related to orthodontic teeth movements. The CBCT should be justified for each patient, and should present added value for diagnostic and/or for treatment planning. The orthodontist needs to interpret and is responsible for all of the field of view.

FR

Cette revue illustrée porte sur les principales indications actuellement recommandées dans la littérature d’utilisation du cone beam computed tomography (CBCT) en orthodontie. Il s’agit des anomalies dentaires, des canines incluses, des dents surnuméraires, des troubles de l’éruption et des résorptions radiculaires externes liées aux traitements orthodontiques. L’examen CBCT doit être justifié individuellement, au cas par cas, et de pouvoir apporter un bénéfice au patient en terme de diagnostic et/ou de traitement orthodontique. L’orthodontiste prescripteur doit être capable d’interpréter et est responsable de l’interprétation de tout ce qui est visible sur l’ensemble du champs de vue du CBCT.

15

Computed tomography of the heads of ancient Egyptian mummies: a systematic review of the medical literature.

45%

Olszewski R., Hastir J.-P., Tilleux C., Delvaux L., Danse E.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2020

|

vol. 9

|

issue 1

1-49

EN

Objective: To summarize the current knowledge on CT scanning of Egyptian mummy heads and faces and provide more valid methodology than that previously available. Material and methods: A systematic review was performed by one observer using two biomedical databases: PubMed and EMBASE. Inclusion and exclusion criteria were applied along with language restrictions. Finally, 2120 articles were found, 359 articles were duplicated among all search equations, 1454 articles were excluded, 307 articles were retained for full review, and 28 articles (31 mummies) were selected for the final study (PRISMA workflow). Results: The data were categorized into the following groups: 1) general information; 2) 1st author affiliation; 3) CT radiological protocol; 4) excerebration pathways; 5) soft tissue preservation; 6) dental status and displaced teeth; 7) packing of the mouth, ears, nose, and eyes, and 8) outer facial appearance. The evidence-based quality of the studies was low because only case reports and small case series were found. Discussion: The embalming art applied to a mummified head and face shows great variability across the whole span of Egyptian civilization. The differences among the various embalming techniques rely on multiple tiny details that are revealed by meticulous analysis of CT scans by a multidisciplinary team of experts. Conclusion: There is a need for more systematization of the CT radiological protocol and the description of Egyptian mumm’y heads and faces to better understand the details of embalming methods.

16

Medical and dental hidden treasures and secrets of 2700-year-old Egyptian mummy: Osirmose - the doorkeeper of the Temple of Re.

45%

Olszewski R., Hastir J.-P., Tilleux C., Delvaux L., Danse E.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2021

|

vol. 17

|

issue 1

1-38

EN

Objective: To perform a ‘virtual autopsy’ on the Egyptian mummy and to study, understand, and interpret three-dimensional (3D) high-resolution computed tomography (CT) scan images of Osirmose’s mummy with a multidisciplinary team composed of radiologists, archaeologists, and oral and maxillofacial surgeon. Material and methods: We studied the Osirmose’s mummy, the doorkeeper of the Temple of Re, who lived during the XXVth dynasty. His mummy belongs to the Royal Museum of Art and History (Inv. E.5889). We performed a high resolution CT scanning of Osirmose’s mummy. We also 3D printed the upper maxilla of the mummy and a tooth found in the oesophagus with a clinically validated low-cost 3D printer. Results: We confirmed the male sex of the mummy. We found the heart, aorta, and kidneys inside the mummy’s body. Brain excerebration was performed through the right ethmoid bone pathway. A wood stick embedded in the dura mater tissue was found inside the skull. The orbicularis oculi muscle, internal canthus, optical nerves, and calcified eye were still present. Artificial eyes were added above the stuffing of eye globes. The skull and face were embalmed with multiple layers of inner bandages in a sophisticated manner. The wear of maxillary teeth was asymmetrical and more pronounced on the maxilla. We discovered three anomalies of the upper maxilla: 1) a rectangular hole on the palatine side of tooth n°26 (the palatine root of tooth n°26 was missing), 2) an indentation at a right angle palatine to tooth n°27, and 3) a semilunar shape of edges around the osteolytic lesion distal and palatine to tooth n°28. Conclusions: The present study provides the first evidence of a tooth removal site, and of oral surgery procedures previously conducted in a 2700-year-old Egyptian embalmed mummy. We found traces of dental root removal, and the opening of a tooth-related osteolytic lesion before the person’s death. The multidisciplinary team, the use of a high resolution 3D CT scan and a 3D-printed model of the upper maxilla helped in this discovery.

17

Contribution of dental private practitioners to publications on anatomical variations using cone beam computed tomography

45%

Hebda A., Theys S., de Roissart J., Perez E., Olszewski R.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2020

|

vol. 14

|

issue 1

1-54

EN

Objective: To investigate the participation of citizens-dental private practitioner in scientific articles about anatomical variations on dentomaxillofacial CBCT. Our null hypothesis was that private practice practitioners are not involved in publications on anatomical variations using cone beam computed tomography. Material and methods: This study was performed from home without access to our university library. Only PubMed database was used to perform our study. We found 384 articles published among 1830 articles corresponding to our inclusion/exclusion criteria. For each selected article we searched for affiliation of all of the authors (university, private dental practice, students, other). We applied a co-creation approach to involve colleagues from private practice in analyzing results of this study. Results: A large majority of authors have university affiliation (96.5%). Only 3% of authors come from private practice. Most of articles belong to the group of 7 emergent economies (E7), and from Asia. 47.9% of 96 journals published only one article on anatomical variations discovered on CBCT. The higher number of articles (18.75%) were published by journals related to endodontics. The 84% of articles were dispersed among a vast span of general and specific dental, and maxillofacial journals. The 68.4% of articles on variations in CBCT were available in closed access and 31.6% of articles were available in open access. Only 6.7% of articles were published in open access without author publication charges (APC). The 31.6% of authors with university affiliation choose open access for their article. 7.8% of authors from private practice were involved in publishing in closed access journals and 2.34% in open access journals. Only 3 articles (0.78%) were published by authors affiliated to private practice without involvement of university authors. 2.6% of articles involved students as co-authors. Authors with other affiliation were involved only in one closed access publication. For the step of co-creation none of 183 private practitioners, and 3/33 (9%) university-affiliated members of Nemesis Facebook group actively participated in analyzing the results of this study. Conclusions: the null hypothesis was accepted: dentists from private practice are exceptionally involved in publications on anatomical variations using CBCT in dentomaxillofacial area.

18

Publications de chirurgie orale et maxillo-faciale dans les pays à ressources limitées en Afrique sub-saharienne : revue de la littérature

39%

Olszewski R., Wendo K., Mavungu E., Bukaka J., Masumbuko F., Kashal Kasong M., Mbuyi-Musanzayi S.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2022

|

vol. 26

|

issue 1

1-40

EN

Objective: To determine the subjects and content of publications produced by oral and maxillofacial surgeons practicing daily in less resourced countries in sub-Saharan Africa (SSA). Materials and methods: We used two databases, PubMed and African online journals, for this literature review. We limited our research to the years 2000-2022. We have chosen the articles with the abstract and only in English or French. For each article we looked for the country of origin, the language of the article, the accessibility of the articles; the name of the newspaper, the number and type of illustrations. For each open access article, we looked for the method of payment for publication and the assignment of copyright. We found 1761 articles and finally retained 47 articles. Results: Publications from SSA countries are very rare among all publications from the African continent (47/1761= 2.6%). All selected articles were published in 33 different newspapers. 46.8% of articles were written by authors from Tanzania and Sudan. Open access articles represent the majority of published articles (59%). Closed access articles are related to Noma and articles in French. We identified only two scientific journals, African Health Sciences and South Sudan Medical Journal, which were free to readers and authors. The English language was predominant (85%). 53 images were freely accessible to illustrate all the subjects of oral and maxillofacial surgery in SSA countries. We also presented the conclusions of the articles by classifying them by subject: 1) Tumors (13 articles), 2) Traumas/maxillofacial fractures (11 articles), 3) Clefts (4 articles), 4) Infectious diseases (5 articles), 5) Cultural practices (4 articles), 6) Noma (2 articles), 7) Syndromes (5 articles), and miscellaneous subjects (3 articles). Conclusions: We presented the system of current scientific publications, the place of scientific publications and the particular aspects of publications on maxillofacial surgery in SSA countries, we proposed possible directions of publication for authors maxillofacial surgeons in SSA countries, as well as the potential place of the journal Nemesis in this African context.

FR

Objectif: Déterminer quels étaient les sujets et le contenu des publications réalisées par des chirurgiens oro-et maxillo-faciaux pratiquant quotidiennement dans les pays à moindre ressources d’Afrique sub-saharienne (ASS). Matériel et méthodes: Nous avons utilisé deux bases de données, PubMed et African online journals, pour cette revue de littérature. Nous avons limité notre recherche aux années 2000-2022. Nous avons choisi les articles avec le résumé et uniquement en langue anglaise ou française. Pour chaque article nous avons cherché le pays d’origine, la langue de l’article, l’accessibilité des articles ; le nom du journal, le nombre et le type d’illustrations. Pour chaque article en accès libre, nous avons cherché le mode de payement de la publication et la cession les droits d’auteur. Nous avons trouvé 1761 articles et retenu finalement 47 articles. Résultats: Les publications issues des pays ASS sont très rares parmi toutes les publications du continent africain (47/1761= 2,6%). Tous les articles retenus étaient publiés dans 33 journaux différents. 46,8% des articles ont été écrits par les auteurs de Tanzanie et de Soudan. Les articles en accès libre représentent la majorité des articles publiés (59%). Les articles en accès fermé sont liés au Noma et aux articles en langue française. Nous avons identifié uniquement deux journaux scientifiques African Health Sciences et South Sudan Medical Journal, qui étaient gratuits pour les lecteurs et les auteurs. La langue anglaise était prédominante (85%). 53 images étaient accessibles gratuitement pour illustrer l’ensemble des sujets de la chirurgie orale et maxillo-faciale dans les pays ASS. Nous avons également présenté les conclusions des articles en les classant par sujets : 1) Tumeurs (13 articles), 2) Traumatismes/fractures maxillo-faciales (11 articles), 3) Fentes (4 articles), 4) Pathologies infectieuses (5 articles), 5) Pratiques culturelles (4 articles), 6) Noma (2 articles), 7) Syndromes (5 articles), et les sujets divers (3 articles). Conclusions: Nous avons présenté le système de publications scientifiques actuelles, la place des publications scientifiques et les aspects particuliers des publications sur la chirurgie maxillofaciale dans les pays ASS, nous avons proposé de possibles directions de publication pour les auteurs chirurgiens maxillo-faciaux des pays ASS, ainsi que la place potentielle de la revue Nemesis dans ce contexte africain.

19

Three-dimensional analysis of airway space and mandibular morphology in Pierre Robin sequence using cone beam computed tomography.

39%

Olszewski R., Dontaine T., Odri G. A., Zech F., Bayet B., Reychler H.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2018

|

vol. 2

|

issue 1

1-27

EN

Objectives: The Pierre Robin sequence (PRS) is defined by retromicrognathia, glossoptosis, and sleep apnea and can also be associated with cleft palate. Diagnosis, management and mandibular catch-up growth are still controversial issues in PRS patients. The aim of our retrospective study was to evaluate in three dimensions (3D) the airway space and mandibular morphology in PRS compared to a normal control group patients in the pre-orthodontic period of life. The null hypothesis was that we would not find a significant difference between the PRS and control group patients in oropharyngeal airway volume measurements. Material and methods: We analyzed 9 PRS patients (mean age: 8 years-old) who underwent cleft palate surgery in the first four months of life, performed by the same surgeon using the same technique. Cone-beam computed tomography (CBCT) was performed in these patients after local ethical committee approval. The control group consisted of 15 patients (mean age: 9 years-old) with CBCT already performed for other reasons. 3D Slicer was used in both groups for semi-automatic segmentation of the airway space. Two independent observers performed semi-automatic segmentations twice in each patient with a one- week interval between the two series of measurements. Airway volume was automatically measured using 3D Slicer. We also developed a 3D cephalometric analysis with Maxilim software in order to define a 3D mandibular morphology which consisted of 25 landmarks, 4 planes, and 23 distances. Two independent observers performed the 3D cephalometric analysis twice for each patient, with a one- week interval between the two series of measurements. Results: There was no significant difference in the intra- and inter-observer measurements between the PRS and control groups for airway space volume (p<0.05). However, there was a significant difference in the shape of the mandible between the PRS group and the control group (p<0.05). Conclusions: Vertical ramus width and mandibular global anteroposterior length were significantly lower in the PRS group. Mandibular hypoplasia could be found in PRS patients not only in the horizontal dimension. Nemesis relevance: the null hypothesis was confirmed. Moreover we failed to find exactly the same control group under 9 years-old due to radioprotection restrictions of application of cone beam CT in children.

20

Supernumerary teeth in premolar and molar area on CBCT: a pictorial review.

39%

Olszewski R., Shimwa-Karengera S., Gurniak A., Gurniak E., Serve A., Simain Sato F.

Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery

|

2022

|

vol. 21

|

issue 1

1-58

UK

Мета: скласти описову класифікацію надкомплектних зубів (НКЗ) в ділянці премолярів та молярів для використання в описі конусно-променевих комп’ютерних томограм (КПКТ). Метою також є поширення значної кількості зображень КПКТ за моделлю відкритого доступу. Матеріали та методи: Для складання огляду ми провели пошук безкоштовних для перегляду повних статей на PubMed з інформацією про: 1) КПКТ НКЗ у ділянці премолярів та молярів; 2) Ускладнення, пов’язані з наявністю НКЗ в ділянці молярів та премолярів. До огляду також були додані класифікації НКЗ в ділянці премолярів і молярів, представлені у інших дослідженнях. Результати: Нами було знайдено 29 клінічних випадків НКЗ, які ми проілюстрували 84-ма малюнками. Ми розділили наш ілюстративний огляд на: 1) Однобічні НКЗ на нижній щелепі; 2) Однобічні НКЗ на верхній щелепі; 3) Однобічні мікродонтичні НКЗ; 4) Двобічні НКЗ; 5) НКЗ з додатковими особливостями; 6) Випадки значної гіпердонтії. Висновки: Створено класифікаційну матрицю для НКЗ в ділянці премолярів і молярів з 11 дескрипторами та 50 блоками. Дескрипторами були: 1) розташування коронки НКЗ в аксіальній проєкції, 2) вертикальне розташування вершини горбка у відношенні до найближчого прорізаного зуба в корональній проєкції, 3) форма, 4) розподіл, 5) положення (у відношенні до положення нормально прорізаного зуба) в сагітальній проєкції, 6) Стан прорізування НКЗ в сагітальній проєкції, 7) Розмір фолікула в сагітальній проєкції, 8) Зовнішня резорбція коренів сусідніх зубів, спричинена НКЗ та його розташуванням у відношенні до довгої осі ураженого зуба, 9) внутрішня резорбція НКЗ, 10) ускладнення у сусідніх зубах, спричинені наявністю НКЗ, 11) ушкодження навколишніх анатомічних структур внаслідок видалення НКЗ. Малюнками з літератури, що знаходилася у відкритому доступі, було проілюстровано 11 блоків. У нашому ілюстративному огляді нам вдалося проілюструвати 45 з 50 блоків, і надати читачам вільний доступ до більш повного опису КПКТ НКЗ в ділянці премолярів та молярів, ніж у раніше опублікованих дослідженнях.

EN

Objective: to build a descriptive classification of premolar and molar supernumerary teeth (ST) when preparing the cone beam computed tomography (CBCT) report. The aim is also to share wide range of CBCT images in the open access publishing model. Material and methods: For our review we systematically searched for articles from PubMed with 1) free full texts on ST in molar and premolar area and using CBCT, and 2) articles providing with information on complications related with the presence of ST in molar and premolar area. We also added to our review studies providing with classic ST classifications in premolar and molar area. Results: We found 29 cases of ST, and we freely illustrated them with 84 figures. We separated our pictorial review in: 1) unilateral ST in the mandible, 2) unilateral ST in the maxilla, 3) unilateral undersized ST, 4) bilateral ST, 5) ST with additional features, and 6) cases with major hyperdontia. Conclusions: we build up the classification matrix for premolar and molar ST with 11 descriptors and 50 boxes. The descriptors were: 1) location if the ST crown in axial view, 2) vertical location of the cusp tip in relation with closest erupted tooth in coronal view, 3) shape, 4) distribution, 5) Position (in relation to normal tooth eruption) in sagittal view, 6) State of eruption of the ST in the sagittal view, 7) Follicle size measurement in sagittal view, 8) External root resorption of adjacent teeth by ST and its location in relation to the long axis of the involved tooth, 9) Internal resorption of ST, 10) Adjacent tooth complication, and 11) Damage to surrounding structures if ST removal. The open access figures from the literature illustrated 11 boxes. With our pictorial review we were able to illustrate 45 out of 50 boxes, and freely provide the readership with the most complete description of ST in premolar and molar area on CBCT than in previously published studies.

Refine search results

Open access resources on motion artifact in adult dentomaxillofacial CBCT: illustrated pictorial review of medical literature

Artifacts related to cone beam computed tomography technology (CBCT) and their significance for clinicians: illustrated review of medical literature.

Accessibility to the knowledge on anatomical variations from dentomaxillofacial CBCT

Déplacement accidentel de la dent de sagesse maxillaire dans le vestibule jugal antérieur

Carpenter syndrome: cone beam computed tomography pictorial review

Dental use of cone beam computed tomography in pediatric embolized arteriovenous maxillofacial malformation

Jael’s syndrome: knife blade impacted in the facial skeleton: an illustrated case report and a review of literature

Cone beam computed tomography (CBCT) in pediatric dentistry

Complications in surgically assisted rapid maxillary expansion: a systematic review of the medical literature

Pathologies osseuses des maxillaires récidivantes

Quality assessment of instructions for authors in dental, oral and maxillofacial journals

Cytotoxicity of three-dimensional paper-based models from a three-dimensional paper-based printer

Diagnostic value of cone beam computed tomography in complex and compound odontomas: a systematic review and open classification matrix

Revue illustrée des principales indications de CBCT en orthodontie.

Computed tomography of the heads of ancient Egyptian mummies: a systematic review of the medical literature.

Medical and dental hidden treasures and secrets of 2700-year-old Egyptian mummy: Osirmose - the doorkeeper of the Temple of Re.

Contribution of dental private practitioners to publications on anatomical variations using cone beam computed tomography

Publications de chirurgie orale et maxillo-faciale dans les pays à ressources limitées en Afrique sub-saharienne : revue de la littérature

Three-dimensional analysis of airway space and mandibular morphology in Pierre Robin sequence using cone beam computed tomography.

Supernumerary teeth in premolar and molar area on CBCT: a pictorial review.