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Rmoutilová R, Piskačová K, Pilmann Kotěrová A, Dupej J, Bejdová Š, Velemínská J, Brůžek J. Classification performance of the Sella-Tunis et al. (2017) sex estimation method in Czech population: different posterior probability threshold approaches. Int J Legal Med 2024; 138:2127-2138. [PMID: 38714567 DOI: 10.1007/s00414-024-03241-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Accepted: 04/22/2024] [Indexed: 05/10/2024]
Abstract
In this study we tested classification performance of a sex estimation method from the mandible originally developed by Sella-Tunis et al. (2017) on a heterogeneous Israeli population. Mandibular linear dimensions were measured on 60 CT scans derived from the Czech living population. Classification performance of Israeli discriminant functions (DFs-IL) was analyzed in comparison with calculated Czech discriminant functions (DFs-CZ) while different posterior probability thresholds (currently discussed in the forensic literature) were employed. Our results comprehensively illustrate sensitivity of different discriminant functions to population differences in body size and degree of sexual dimorphism. We demonstrate that the error rate may be biased when presented per posterior probability threshold. DF-IL 1 showed least sensitivity to population origin and fulfilled criteria of sufficient classification performance when applied on the Czech sample with a minimum posterior probability threshold of 0.88 reaching overall accuracy ≥ 95%, zero sex bias, and 80% of classified individuals. The last parameter was higher in DF-CZ 1 which was the main difference between those two DFs suggesting relatively low dependance on population origin. As the use of population-specific methods is often prevented by complicated assessment of population origin, DF-IL 1 is a candidate for a sufficiently robust method that could be reliably applied outside the reference sample, and thus, its classification performance deserves further testing on more population samples.
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Affiliation(s)
- Rebeka Rmoutilová
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic.
- Hrdlicka Museum of Man, Faculty of Science, Charles University, Viničná 7, 128 00, Prague 2, Czech Republic.
| | - Kateřina Piskačová
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic
| | - Anežka Pilmann Kotěrová
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic
| | - Ján Dupej
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic
| | - Šárka Bejdová
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic
| | - Jana Velemínská
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic
| | - Jaroslav Brůžek
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Viničná 7, 128 43, Prague, Czech Republic
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2
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Chalazoniti A, Lattanzi W, Halazonetis DJ. Shape variation and sex differences of the adult human mandible evaluated by geometric morphometrics. Sci Rep 2024; 14:8546. [PMID: 38609399 PMCID: PMC11014969 DOI: 10.1038/s41598-024-57617-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Accepted: 03/20/2024] [Indexed: 04/14/2024] Open
Abstract
In cases of osseous defects, knowledge of the anatomy, and its age and sex-related variations, is essential for reconstruction of normal morphology. Here, we aimed at creating a 3D atlas of the human mandible in an adult sample using dense landmarking and geometric morphometrics. We segmented 50 male and 50 female mandibular surfaces from CBCT images (age range: 18.9-73.7 years). Nine fixed landmarks and 510 sliding semilandmarks were digitized on the mandibular surface, and then slid by minimizing bending energy against the average shape. Principal component analysis extracted the main patterns of shape variation. Sexes were compared with permutation tests and allometry was assessed by regressing on the log of the centroid size. Almost 49 percent of shape variation was described by the first three principal components. Shape variation was related to width, height and length proportions, variation of the angle between ramus and corpus, height of the coronoid process and inclination of the symphysis. Significant sex differences were detected, both in size and shape. Males were larger than females, had a higher ramus, more pronounced gonial angle, larger inter-gonial width, and more distinct antegonial notch. Accuracy of sexing based on the first two principal components in form space was 91 percent. The degree of edentulism was weakly related to mandibular shape. Age effects were not significant. The resulting atlas provides a dense description of mandibular form that can be used clinically as a guide for planning surgical reconstruction.
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Affiliation(s)
- Aspasia Chalazoniti
- Department of Prosthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Wanda Lattanzi
- Department of Life Science and Public Health, Università Cattolica del Sacro Cuore, Rome, Italy
- Unit of Paediatric Neurosurgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Demetrios J Halazonetis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.
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3
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Di Spirito F, Scelza G, Fornara R, Giordano F, Rosa D, Amato A. Post-Operative Endodontic Pain Management: An Overview of Systematic Reviews on Post-Operatively Administered Oral Medications and Integrated Evidence-Based Clinical Recommendations. Healthcare (Basel) 2022; 10:healthcare10050760. [PMID: 35627897 PMCID: PMC9141195 DOI: 10.3390/healthcare10050760] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 04/13/2022] [Accepted: 04/18/2022] [Indexed: 01/08/2023] Open
Abstract
Endodontic treatment comprises the overall management of pre-, intra- and post-operative symptoms, including post-operative endodontic pain, considered as a complication susceptible of chronicization. Post-operative pain is very common and highly unpreventable and has a multi-factorial etiology and a potential pathogenic link to the acute inflammation of the periapical area, secondary to localized chemical, mechanical, host and/or microbial damage occurring during endodontic treatment. Considering the multitude of heterogeneous technical and pharmacological approaches proposed to control post-operative endodontic pain, the present study primarily comprised an overview of systematic reviews of systematic reviews of randomized clinical trials, summarizing findings on post-operatively administered oral medications for post-operative endodontic pain control, in order to note the most effective type and dosage of such drugs. Secondarily, a narrative review of the current evidence on technical solutions to be observed during endodontic treatment procedures, to control post-operative pain, was conducted to provide integrated evidence-based clinical recommendations for optimal post-operative endodontic pain management.
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Affiliation(s)
- Federica Di Spirito
- Department of Medicine, Surgery and Dentistry “Schola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (G.S.); (F.G.); (D.R.); (A.A.)
- Correspondence: or
| | - Giuseppe Scelza
- Department of Medicine, Surgery and Dentistry “Schola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (G.S.); (F.G.); (D.R.); (A.A.)
| | | | - Francesco Giordano
- Department of Medicine, Surgery and Dentistry “Schola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (G.S.); (F.G.); (D.R.); (A.A.)
| | - Donato Rosa
- Department of Medicine, Surgery and Dentistry “Schola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (G.S.); (F.G.); (D.R.); (A.A.)
| | - Alessandra Amato
- Department of Medicine, Surgery and Dentistry “Schola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (G.S.); (F.G.); (D.R.); (A.A.)
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4
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Determination of Morphogeometric Patterns in Individuals with Total Mandibular Edentulism in the Interforaminal Region from Cone Beam Computed Tomography (CBCT) Scans: A Pilot Study. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12083813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The aim of this study was to determine the morphogeometric patterns of the interforaminal region from cone beam computed tomography (CBCT) scans of individuals with total mandibular edentulism. CBCT images were obtained from 40 patients with total edentulism who are older (12 men and 28 women; average age of 69.5 ± 9.4 years) and who wore a non-implant-supported, lower, removable, total prosthesis. We conducted a two-dimensional (2D) morphogeometric analysis of the Digital Imaging and Communication in Medicine (DICOM) files from the CBCT scans, and five equidistant cross sections were planned. For the three-dimensional (3D) morphogeometric analysis, standard triangular language (STL) files were obtained after segmentation of the interforaminal mandibular region, and four anatomical landmarks and their respective curves were digitized. The patterns among the shapes were determined using principal component analysis (PCA) on MorphoJ software (version 1.07a). The results of the 2D morphogeometric analyses for PCA of the interforaminal mandibular paramedian region were PC1 or elongated drop shape, 54.78%; PC2 or wineskin shape, 17.65%; PC3 or pear shape, 11.77%; and PC4 or eggplant shape, 5.71%, and those for PCA of the symphyseal region were PC1 or elongated drop shape, 62.13%; PC2 or ovoid shape, 11.64%; PC3 or triangular shape, 9.71%; and PC4 or tuber shape, 4.96%. The results of the 3D morphogeometric analyses for the interforaminal hemimandibular region were PC1, 59.83%; PC2, 10.39%; PC3, 7.67%; and PC4, 5.09%. This study provides relevant information for future clinical guidelines on prosthetics and implants, in addition to proposing the use of new technologies that support diagnosis and treatment in patients with edentulism.
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D’Ambrosio F, Caggiano M, Schiavo L, Savarese G, Carpinelli L, Amato A, Iandolo A. Chronic Stress and Depression in Periodontitis and Peri-Implantitis: A Narrative Review on Neurobiological, Neurobehavioral and Immune-Microbiome Interplays and Clinical Management Implications. Dent J (Basel) 2022; 10:49. [PMID: 35323251 PMCID: PMC8947556 DOI: 10.3390/dj10030049] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 02/06/2023] Open
Abstract
Besides the well-known systemic factors for periodontal and peri-implant diseases, additional co-factors, such as chronic stress and depression, may also affect disease onset and progression as well as treatment responsiveness. Neurobiological and neurobehavioral pathogenic links between chronic stress and depression, on the one side, and periodontitis and peri-implantitis, on the other side, which have been little investigated and principally related to necrotizing periodontal disease, have been reviewed, along with their putative interconnections with periodontal immune-microbiome balance. Rising evidence suggest that dysregulated neurobiological and neurobehavioral factors, as well as periodontal immune-microbiome unbalance, all related to chronic stress and depression, may crucially interact and thus represent contributing factors in the genesis and worsening not only of necrotizing periodontal lesions, but also of chronic periodontitis and peri-implantitis. Such potential interconnections may be even more relevant in recurrent and aggressive cases of periodontal and peri-implant disease, which are frequently refractory to therapy, and may, if corroborated, coherently pave the way for personalized prevention and treatment strategies, possibly targeting immune-microbiome unbalance and neurobehavioral factors and focusing on neurobiological ones, especially in chronically stressed and depressed subjects with periodontitis and peri-implantitis.
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Affiliation(s)
- Francesco D’Ambrosio
- Department of Medicine, Surgery and Dentistry “Schola Medica Salernitana”, University of Salerno, Via S. Allende, 84081 Baronissi, Italy; (M.C.); (L.S.); (G.S.); (L.C.); (A.A.); (A.I.)
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6
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Sun Y, Yu T, Strasding M, Liu X, Burkhardt F, Schäfer B, Sailer I, Nesic D. Design of customized soft-tissue substitutes for posterior single-tooth defects: A proof-of-concept in-vitro study. Clin Oral Implants Res 2021; 32:1263-1273. [PMID: 34448240 PMCID: PMC9292282 DOI: 10.1111/clr.13831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 06/30/2021] [Accepted: 08/09/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Soft-tissue volume augmentation treatments do not provide the satisfactory long-term functional and esthetic outcomes. The aim of the study was to develop a standardized digital procedure to design individual soft-tissue substitutes (STS) and apply mathematical modeling to obtain average shape STS for single posterior tooth defects. MATERIAL AND METHODS Thirty-three casts from 30 patients were scanned. STS were designed with a computer-aided design software and a systematic procedure standardized the measurements across all STS using 3D-analysis software. The occlusal, mesial-distal, and buccal-lingual planes were defined to partition, each STS and produce a mesh. The thickness values of each 3D slice were documented in a coordinate system chart to generate a scatter graph. Graphs were embedded into images (Orange software) and images were analyzed via hierarchical clustering. RESULTS Three STS groups were identified according to shape. Two shapes corresponded to the maxilla defects: a square (n = 13) with dimensions of 10 mm in a lingual-buccal (length) and 7-10 mm in a mesial-distal (width) direction; a rectangle (n = 11) of 11 mm in length and 4-7 mm in width. The average shape for mandible defects (n = 9) was smaller (6-8 mm in length, 5-10 mm in width). The highest thickness in all STS was in the buccal portion, above the alveolar ridge, with median values of 2 mm. The lowest thickness of 0.2 mm was at the edges. CONCLUSIONS The study developed novel methodology to design customized, as well as average shape STS for volume augmentation. Future STS harboring adapted geometry might increase volume augmentation efficiency and accuracy, while reducing surgical time.
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Affiliation(s)
- Yue Sun
- Division of Orthodontics, Beijing Stomatological Hospital, Capital Medical University, Beijing, China.,Division of Fixed Prosthodontics and Biomaterials, University Clinic of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Tao Yu
- Division of Fixed Prosthodontics and Biomaterials, University Clinic of Dental Medicine, University of Geneva, Geneva, Switzerland.,Clinical Division, Peking University Hospital of Stomatology, Beijing, China.,National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Malin Strasding
- Division of Fixed Prosthodontics and Biomaterials, University Clinic of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Xinran Liu
- Division of Fixed Prosthodontics and Biomaterials, University Clinic of Dental Medicine, University of Geneva, Geneva, Switzerland.,Clinical Division, Peking University Hospital of Stomatology, Beijing, China.,National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Felix Burkhardt
- Division of Fixed Prosthodontics and Biomaterials, University Clinic of Dental Medicine, University of Geneva, Geneva, Switzerland
| | | | - Irena Sailer
- Division of Fixed Prosthodontics and Biomaterials, University Clinic of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Dobrila Nesic
- Division of Fixed Prosthodontics and Biomaterials, University Clinic of Dental Medicine, University of Geneva, Geneva, Switzerland
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7
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Costa Mendes L, Delrieu J, Gillet C, Telmon N, Maret D, Savall F. Sexual dimorphism of the mandibular conformational changes in aging human adults: A multislice computed tomographic study by geometric morphometrics. PLoS One 2021; 16:e0253564. [PMID: 34157047 PMCID: PMC8219137 DOI: 10.1371/journal.pone.0253564] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 06/09/2021] [Indexed: 11/26/2022] Open
Abstract
The aging process has an impact on mandibular bone morphology and can therefore affect shape sexual dimorphism. Understanding the effect of senescence on mandibular shape changes is particularly important to correctly estimate the sex of an individual and predict age-related conformational modifications. The purpose of this study was to assess age-related changes in mandibular shape and sexual dimorphism. The study sample comprised 160 Multi Slice Computed Tomography examinations of individuals aged 40 to 79 years. Geometric morphometric analysis of fourteen osteometric landmarks was used to examine sexual dimorphism and patterns of mandibular shape variation with age. Results showed that mandibular sexual dimorphism of shape remained significant with aging. Conformational changes occurred between 50 and 70 years and were different for male and female individuals. Females presented earlier and more marked age-related shape changes than males. These observations suggest that mandibular senescence is a sexually dimorphic process since its onset, rate, and the areas subjected to conformational changes differ from male to female individuals. Senescence-related changes present substantial variability, and further investigation is required to determine precisely the age that marks their onset.
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Affiliation(s)
- Leonor Costa Mendes
- Laboratoire d’Anthropobiologie AMIS, UMR 5288 CNRS, Université Paul Sabatier, Toulouse, France
- UFR d’Odontologie de Toulouse, Toulouse, France
- * E-mail:
| | - Julien Delrieu
- Laboratoire d’Anthropobiologie AMIS, UMR 5288 CNRS, Université Paul Sabatier, Toulouse, France
- UFR d’Odontologie de Toulouse, Toulouse, France
| | - Claudia Gillet
- Laboratoire d’Anthropobiologie AMIS, UMR 5288 CNRS, Université Paul Sabatier, Toulouse, France
| | - Norbert Telmon
- Laboratoire d’Anthropobiologie AMIS, UMR 5288 CNRS, Université Paul Sabatier, Toulouse, France
- Service de Médecine Légale, CHU Toulouse Rangueil, Toulouse, France
| | - Delphine Maret
- Laboratoire d’Anthropobiologie AMIS, UMR 5288 CNRS, Université Paul Sabatier, Toulouse, France
- UFR d’Odontologie de Toulouse, Toulouse, France
| | - Frédéric Savall
- Laboratoire d’Anthropobiologie AMIS, UMR 5288 CNRS, Université Paul Sabatier, Toulouse, France
- Service de Médecine Légale, CHU Toulouse Rangueil, Toulouse, France
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8
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Morice A, Cornette R, Giudice A, Collet C, Paternoster G, Arnaud É, Galliani E, Picard A, Legeai-Mallet L, Khonsari RH. Early mandibular morphological differences in patients with FGFR2 and FGFR3-related syndromic craniosynostoses: A 3D comparative study. Bone 2020; 141:115600. [PMID: 32822871 DOI: 10.1016/j.bone.2020.115600] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/10/2020] [Accepted: 08/14/2020] [Indexed: 01/04/2023]
Abstract
Syndromic craniosynostoses are defined by the premature fusion of one or more cranial and facial sutures, leading to skull vault deformation, and midfacial retrusion. More recently, mandibular shape modifications have been described in FGFR-related craniosynostoses, which represent almost 75% of the syndromic craniosynostoses. Here, further characterisation of the mandibular phenotype in FGFR-related craniosynostoses is provided in order to confirm mandibular shape modifications, as this could contribute to a better understanding of the involvement of the FGFR pathway in craniofacial development. The aim of our study was to analyse early mandibular morphology in a cohort of patients with FGFR2- (Crouzon and Apert) and FGFR3- (Muenke and Crouzonodermoskeletal) related syndromic craniosynostoses. We used a comparative geometric morphometric approach based on 3D imaging. Thirty-one anatomical landmarks and eleven curves with sliding semi-landmarks were defined to model the shape of the mandible. In total, 40 patients (12 with Crouzon, 12 with Apert, 12 with Muenke and 4 with Crouzonodermoskeletal syndromes) and 40 age and sex-matched controls were included (mean age: 13.7 months ±11.9). Mandibular shape differed significantly between controls and each patient group based on geometric morphometrics. Mandibular shape in FGFR2-craniosynostoses was characterized by open gonial angle, short ramus height, and high and prominent symphysis. Short ramus height appeared more pronounced in Apert than in Crouzon syndrome. Additionally, narrow inter-condylar and inter-gonial distances were observed in Crouzon syndrome. Mandibular shape in FGFR3-craniosynostoses was characterized by high and prominent symphysis and narrow inter-gonial distance. In addition, narrow condylar processes affected patients with Crouzonodermoskeletal syndrome. Statistical analysis of variance showed significant clustering of Apert and Crouzon, Crouzon and Muenke, and Apert and Muenke patients (p < 0.05). Our results confirm distinct mandibular shapes at early ages in FGFR2- (Crouzon and Apert syndromes) and FGFR3-related syndromic craniosynostoses (Muenke and Crouzonodermoskeletal syndromes) and reinforce the hypothesis of genotype-phenotype correspondence concerning mandibular morphology.
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Affiliation(s)
- A Morice
- Service de Chirurgie Maxillo-Faciale et Chirurgie Plastique, Hôpital Universitaire Necker - Enfants Malades, Assistance Publique - Hôpitaux de Paris, Centre de Référence Maladies Rares MAFACE Fentes et Malformations Faciales, Université de Paris, Paris, France; Laboratoire 'Bases Moléculaires et Physiopathologiques des Ostéochondrodysplasies', INSERM UMR 1163, Institut Imagine, Paris, France.
| | - R Cornette
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, Sorbonne Université, Ecole Pratique des Hautes Etudes, Université des Antilles, CNRS, CP 50, 57 rue Cuvier, 75005 Paris, France
| | - A Giudice
- Università Degli Studi di Catanzaro 'Magna Graecia', Catanzaro, Italy
| | - C Collet
- BIOSCAR, INSERM U1132, Université de Paris, Hôpital Lariboisière, 75010 Paris, France; Service de Biochimie et Biologie Moléculaire, CHU-Paris-GH Saint Louis Lariboisière Widal, Paris, France
| | - G Paternoster
- Service de Neurochirurgie, Hôpital Universitaire Necker - Enfants Malades, Assistance Publique - Hôpitaux de Paris, Centre de Référence Maladies Rares CRANIOST Craniosténoses et Malformations Craniofaciales, Université de Paris, Paris, France
| | - É Arnaud
- Service de Neurochirurgie, Hôpital Universitaire Necker - Enfants Malades, Assistance Publique - Hôpitaux de Paris, Centre de Référence Maladies Rares CRANIOST Craniosténoses et Malformations Craniofaciales, Université de Paris, Paris, France
| | - E Galliani
- Service de Chirurgie Maxillo-Faciale et Chirurgie Plastique, Hôpital Universitaire Necker - Enfants Malades, Assistance Publique - Hôpitaux de Paris, Centre de Référence Maladies Rares MAFACE Fentes et Malformations Faciales, Université de Paris, Paris, France
| | - A Picard
- Service de Chirurgie Maxillo-Faciale et Chirurgie Plastique, Hôpital Universitaire Necker - Enfants Malades, Assistance Publique - Hôpitaux de Paris, Centre de Référence Maladies Rares MAFACE Fentes et Malformations Faciales, Université de Paris, Paris, France
| | - L Legeai-Mallet
- Laboratoire 'Bases Moléculaires et Physiopathologiques des Ostéochondrodysplasies', INSERM UMR 1163, Institut Imagine, Paris, France
| | - R H Khonsari
- Service de Chirurgie Maxillo-Faciale et Chirurgie Plastique, Hôpital Universitaire Necker - Enfants Malades, Assistance Publique - Hôpitaux de Paris, Centre de Référence Maladies Rares MAFACE Fentes et Malformations Faciales, Université de Paris, Paris, France; Laboratoire 'Bases Moléculaires et Physiopathologiques des Ostéochondrodysplasies', INSERM UMR 1163, Institut Imagine, Paris, France; Service de Neurochirurgie, Hôpital Universitaire Necker - Enfants Malades, Assistance Publique - Hôpitaux de Paris, Centre de Référence Maladies Rares CRANIOST Craniosténoses et Malformations Craniofaciales, Université de Paris, Paris, France
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9
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Mense C, Saliba-Serre B, Ferrandez AM, Hüe O, Ruquet M, Lalys L. Cone beam computed tomography analysis of the edentulous mandibular symphysis. J Dent Sci 2020; 16:115-122. [PMID: 33384787 PMCID: PMC7770296 DOI: 10.1016/j.jds.2020.06.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 06/13/2020] [Indexed: 11/30/2022] Open
Abstract
Background/purpose Overdenture with single symphyseal implant is one of the useful clinical approach for elderly edentulous patients. We aimed to evaluate edentulous patients with regards to the relationship between dimensions, bone characteristics, cancellous densities, and cortical thickness of the mandibular symphyseal region using cone beam computed tomography (CBCT). Material and methods We analyzed 103 CBCT from pre-implant investigations. All included patients were healthy without any disorders affecting bone metabolism. We performed 13 measurements for each patient: 9 of height, width, and thickness (mm) and 4 of density (Hounsfield Units; HU). Fisher's exact test was applied to examine the association between two categorical variables, the Pearson correlation coefficient to measure the strength of linear relationship between two quantitative variables. We used the two-sample Student's t-test to compare mean symphysis height between men and women, the paired Student's t-test to compare mean lingual and buccal cortical thickness. For all tests, the threshold of significance was fixed at 5%. Results Men and women significantly differed with regards to mean total symphysis height (p = 0.004) and the distribution of Cawood and Howell classifications (p = 0.033). Symphysis height was negatively correlated with mean density of cancellous bone (r = −0.453, p < 0.001). Mean lingual cortical thickness significantly differed from mean vestibular thickness (p < 0.001, paired Student's t-test). Conclusion Present findings supported that symphyseal measurements are parameters that reflect the symphysis bone characteristics, and can guide the choice of a suitable implant design.
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Affiliation(s)
- Chloë Mense
- Aix Marseille University, CNRS, EFS, ADES, Marseille, France.,Faculty of Odontology, Aix-Marseille University, Marseille, France.,Department of Prosthetic Dentistry, AP-HM, Odontology, Hôpital de la Timone, Marseille, France
| | | | | | - Olivier Hüe
- Aix Marseille University, CNRS, EFS, ADES, Marseille, France.,Faculty of Odontology, Aix-Marseille University, Marseille, France.,Department of Prosthetic Dentistry, AP-HM, Odontology, Hôpital de la Timone, Marseille, France
| | - Michel Ruquet
- Aix Marseille University, CNRS, EFS, ADES, Marseille, France.,Faculty of Odontology, Aix-Marseille University, Marseille, France.,Department of Prosthetic Dentistry, AP-HM, Odontology, Hôpital de la Timone, Marseille, France
| | - Loïc Lalys
- Aix Marseille University, CNRS, EFS, ADES, Marseille, France
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10
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Exploratory study of the three-dimensional morphological variation of the jaw associated to teeth loss. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2019; 120:523-528. [PMID: 30910763 DOI: 10.1016/j.jormas.2019.03.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 02/10/2019] [Accepted: 03/15/2019] [Indexed: 11/22/2022]
Abstract
PURPOSE The aim of this study is to evaluate the morphological variability in mandibles with different types of edentulism, comparing the use of traditional morphometrics and tridimensional geometric morphometrics. METHODS Traditional morphometrics and geometric morphometrics (GM) exploratory analysis, by principal components (PCs) and PC scores, were performed on a sample of 24 cadaveric hemi mandibles. A digital reconstruction of 3D surfaces of each specimen was obtained by CT scans segmentation. The mandibles were divided in three groups: full dentition (G1), partial edentition (G2) and total edentition (G3). The results of the two methods were compared in relation to the morphological variability determined with each method. RESULTS Both methods were consistent in terms of morphological variability between the defined groups. The main shape variations observed were a decrease in mandibular body height, a widening of the cross sectional morphology on the symphysis, a shorten-narrowed Ramus and a deeper sigmoid notch, in the partially or totally edentition groups, compared to the full dentition group. DISCUSSION The general patterns of morphological variations associated with edentulism that have been reported in literature could be visualized with GM method, which had not been previously used for this purpose. The GM methods could offer a more detailed definition of shape variations, which is critical in a clinical context. Moreover, GM allowed defining configurations of mean morphologies and an image library with different types of morphological variations.
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