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Marañón-Vásquez GA, de Souza Araújo MT, de Oliveira Ruellas AC, Matsumoto MAN, Figueiredo M, Meyfarth SRS, Antunes LAA, Baratto-Filho F, Scariot R, Flores-Mir C, Kirschneck C, Santos Antunes L, Küchler EC. BMP2 rs1005464 is associated with mandibular condyle size variation. Sci Rep 2024; 14:5987. [PMID: 38472272 DOI: 10.1038/s41598-024-56530-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 03/07/2024] [Indexed: 03/14/2024] Open
Abstract
This study aimed to evaluate the association between single nucleotide polymorphisms (SNPs) in endochondral development-related genes and mandibular condyle shape, size, volume, and symmetry traits. Cone-beam Computed Tomographies and genomic DNA from 118 individuals were evaluated (age range: 15-66 years). Data from twelve 3D landmarks on mandibular condyles were submitted to morphometric analyses including Procrustes fit, principal component analysis, and estimation of centroid sizes and fluctuating asymmetry scores. Condylar volumes were additionally measured. Seven SNPs across BMP2, BMP4, RUNX2 and SMAD6 were genotyped. Linear models were fit to evaluate the effect of the SNPs on the mandibular condyles' quantitative traits. Only the association between BMP2 rs1005464 and centroid size remained significant after adjusting to account for the false discovery rate due to multiple testing. Individuals carrying at least one A allele for this SNP showed larger condylar size than common homozygotes GG (β = 0.043; 95% CI: 0.014-0.071; P value = 0.028). The model including BMP2 rs1005464, age and sex of the participants explained 17% of the variation in condylar size. Shape, volume, and symmetry were not associated with the evaluated SNPs. These results suggest that BMP2 rs1005464 might be associated with variation in the mandibular condyles size.
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Affiliation(s)
- Guido Artemio Marañón-Vásquez
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rua. Prof. Rodolpho Paulo Rocco, 325 - Cidade Universitária da Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-617, Brazil
| | - Mônica Tirre de Souza Araújo
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rua. Prof. Rodolpho Paulo Rocco, 325 - Cidade Universitária da Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-617, Brazil
| | - Antônio Carlos de Oliveira Ruellas
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rua. Prof. Rodolpho Paulo Rocco, 325 - Cidade Universitária da Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-617, Brazil
| | - Mírian Aiko Nakane Matsumoto
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n., Ribeirão Preto, São Paulo, 14040-904, Brazil
| | - Marcio Figueiredo
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n., Ribeirão Preto, São Paulo, 14040-904, Brazil
| | - Sandra Regina Santos Meyfarth
- Department of Specific Formation, School of Dentistry, Fluminense Federal University, Rua. Dr. Silvio Henrique Braune, 22 - Centro, Nova Friburgo, Rio de Janeiro, 28625-650, Brazil
| | - Lívia Azeredo Alves Antunes
- Department of Specific Formation, School of Dentistry, Fluminense Federal University, Rua. Dr. Silvio Henrique Braune, 22 - Centro, Nova Friburgo, Rio de Janeiro, 28625-650, Brazil
| | - Flares Baratto-Filho
- Post-Graduation Program, Tuiuti University of Paraná, R. Padre Ladislau Kula, 395 - Santo Inácio, Curitiba, Brazil
- School of Dentistry, Univille - Univille - University of the Joinville Region, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, Santa Catarina, 89219-710, Brazil
| | - Rafaela Scariot
- Department of Stomatology, School of Dentistry, Federal University of Paraná, Av. Prefeito Lothário Meissner, 632 - Jardim Botânico, Curitiba, PR, 80210-170, Brazil
| | - Carlos Flores-Mir
- Graduate Orthodontic Program, School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, 5-528 Edmonton Clinic Health Academy, 11405 87 Ave NW, Edmonton, AB, T6G 1C9, Canada
| | - Christian Kirschneck
- Department of Orthodontics, Medical Faculty, University Hospital Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - Leonardo Santos Antunes
- Department of Specific Formation, School of Dentistry, Fluminense Federal University, Rua. Dr. Silvio Henrique Braune, 22 - Centro, Nova Friburgo, Rio de Janeiro, 28625-650, Brazil
| | - Erika Calvano Küchler
- Department of Orthodontics, Medical Faculty, University Hospital Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany.
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Xiang W, Wang M, Li Z, Cai M, Pan X. Correlation between temporomandibular joints and craniocervical posture in patients with bilateral anterial disc displacement. BMC Oral Health 2024; 24:159. [PMID: 38297238 PMCID: PMC10832266 DOI: 10.1186/s12903-024-03892-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Accepted: 01/12/2024] [Indexed: 02/02/2024] Open
Abstract
OBJECTIVE To study the changes of temporomandibular joints and craniocervical posture in adult patients with bilateral anterior disc displacement, and to explore their correlation, which may provide some clinical value for clinical diagnosis and treatment planning. METHODS Ninety-eight adult patients were divided into 3 groups: 29 patients in bilateral disc normal position group (BN), 33 patients in bilateral Anterior Disc Displacement With Reduction group (ADDWR) and 36 patients in bilateral Anterior Disc Displacement Without Reduction group (ADDWoR). Dolphin and Uceph software were used to measure 14 items of temporomandibular joint and 11 items of craniocervical posture for comparison and correlation analysis between groups. RESULTS There were significant differences in bilateral joint space between three groups. Compared with the BN, the anteroposterior diameter of the condyle was significantly reduced, the condyle was significantly displaced posteriorly and superiorly in the ADDWR and ADDWoR, but the joint fossa width and joint fossa depth did not change significantly. Cervical curvature and inclination were greater in patients with anterior disc displacement than BN, indicating that the craniocervical posture of adult patients with anterior disc displacement was extended and protrusive. CONCLUSION Anterior disc displacement of the temporomandibular joint can displace the condyle upwards and posteriorly and reduce the anteroposterior diameter of condyle, and then make the condyle closer to the wall of articular fossa to induce joint symptoms. Additionally, craniocervical postural position is significantly affected, which may be related to compensate for the effects of airway space.
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Affiliation(s)
- Wanfang Xiang
- School/Hospital of Stomatology, Lanzhou University, Tianshui South Road, Chengguan District, Lanzhou, Gansu Province, 730000, People's Republic of China
| | - Min Wang
- School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Zhihui Li
- School/Hospital of Stomatology, Lanzhou University, Tianshui South Road, Chengguan District, Lanzhou, Gansu Province, 730000, People's Republic of China
| | - Mingqin Cai
- School/Hospital of Stomatology, Lanzhou University, Tianshui South Road, Chengguan District, Lanzhou, Gansu Province, 730000, People's Republic of China
| | - Xiaojing Pan
- School/Hospital of Stomatology, Lanzhou University, Tianshui South Road, Chengguan District, Lanzhou, Gansu Province, 730000, People's Republic of China.
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Sun T, Shao B, Chong DYR, Liu Z. Morphological analysis of the temporomandibular joint in patients with anterior disc displacement. Comput Methods Biomech Biomed Engin 2024; 27:521-530. [PMID: 36988303 DOI: 10.1080/10255842.2023.2188990] [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: 10/21/2022] [Accepted: 03/04/2023] [Indexed: 03/30/2023]
Abstract
This study aims to investigate the morphological characteristics of the temporomandibular joint (TMJ) in the patients with anterior disc displacement with reduction (ADDwR) and the alterations after occlusal splint treatment. Thirty ADDwR patients and ten asymptomatic subjects were recruited. Thirteen parameters were adopted, along with automatic computation and presentation of the joint space to characterize the TMJ morphologies. Statistical results showed that morphological discrepancies between the patients and the asymptomatic subjects were ubiquitous. The adjustment of condyle position through occlusal splint treatment can result in joint spaces widening and has positive effects on mitigating the conditions of ADDwR.
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Affiliation(s)
- Tinghui Sun
- Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China
- Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Yibin, China
| | - Bingmei Shao
- Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Yibin, China
- Basic Mechanics Lab, Sichuan University, Chengdu, China
| | - Desmond Y R Chong
- Engineering Cluster, Singapore Institute of Technology, Singapore, Singapore
| | - Zhan Liu
- Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China
- Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Yibin, China
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Gao Y, Luo D, Yuan M, Yang Y, Xu Z, Yang J. The relationship between the oblique sagittal temporomandibular joint disc position and the volume surface area of the condyle in young TMD adults. Front Bioeng Biotechnol 2023; 11:1321241. [PMID: 38188491 PMCID: PMC10768064 DOI: 10.3389/fbioe.2023.1321241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 12/11/2023] [Indexed: 01/09/2024] Open
Abstract
The present study aims to compare the volume surface area of the condyle, the horizontal condylar axial angle and the disc-condyle angle between temporomandibular disorder (TMD) and asymptomatic volunteers, explore and analyze the relationship between the temporomandibular joint (TMJ) disc position in oblique sagittal plane and the volume surface area of the condyle in young adults with TMD symptoms. 84 young adult volunteers were received TMJ examination by Magnetic Resonance Imaging (MRI) and Cone Beam Computed Tomography (CBCT). TMD and asymptomatic volunteers were 42 each. MRI was used to assess the position of TMJ disc in the oblique sagittal plane with the condyle apex method. CBCT data were used for three-dimensional (3D) reconstruction of condyle and the measurements of the horizontal condylar axial angle and the volume surface area of the condyle. The condylar volume surface area of the TMD group was smaller than that of the asymptomatic group (p < 0.05), the disc condyle angle was larger than that of the asymptomatic group (p < 0.05), and no significant difference was found in the horizontal condylar axial angle (p > 0.05). In terms of correlation, the volume surface area of the condyle were negatively correlated with the position of the articular disc in TMD patients (p < 0.05). This significant negative correlation suggests that the possibility of disc displacement can be considered when poor condylar morphology is found.
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Affiliation(s)
- Yudong Gao
- The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Dan Luo
- The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Mujie Yuan
- The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Yanhao Yang
- The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Zexian Xu
- The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
- Dental Digital Medicine and 3D Printing Engineering Laboratory of Qingdao, Qingdao, China
| | - Jianjun Yang
- The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
- Dental Digital Medicine and 3D Printing Engineering Laboratory of Qingdao, Qingdao, China
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Bi R, Li Q, Li H, Wang P, Fang H, Yang X, Wang Y, Hou Y, Ying B, Zhu S. Divergent chondro/osteogenic transduction laws of fibrocartilage stem cell drive temporomandibular joint osteoarthritis in growing mice. Int J Oral Sci 2023; 15:36. [PMID: 37626033 PMCID: PMC10457315 DOI: 10.1038/s41368-023-00240-5] [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: 04/28/2023] [Revised: 07/20/2023] [Accepted: 07/26/2023] [Indexed: 08/27/2023] Open
Abstract
The anterior disc displacement (ADD) leads to temporomandibular joint osteoarthritis (TMJOA) and mandibular growth retardation in adolescents. To investigate the potential functional role of fibrocartilage stem cells (FCSCs) during the process, a surgical ADD-TMJOA mouse model was established. From 1 week after model generation, ADD mice exhibited aggravated mandibular growth retardation with osteoarthritis (OA)-like joint cartilage degeneration, manifesting with impaired chondrogenic differentiation and loss of subchondral bone homeostasis. Lineage tracing using Gli1-CreER+; Tmfl/-mice and Sox9-CreER+;Tmfl/-mice showed that ADD interfered with the chondrogenic capacity of Gli1+ FCSCs as well as osteogenic differentiation of Sox9+ lineage, mainly in the middle zone of TMJ cartilage. Then, a surgically induced disc reposition (DR) mouse model was generated. The inhibited FCSCs capacity was significantly alleviated by DR treatment in ADD mice. And both the ADD mice and adolescent ADD patients had significantly relieved OA phenotype and improved condylar growth after DR treatment. In conclusion, ADD-TMJOA leads to impaired chondrogenic progenitor capacity and osteogenesis differentiation of FCSCs lineage, resulting in cartilage degeneration and loss of subchondral bone homeostasis, finally causing TMJ growth retardation. DR at an early stage could significantly alleviate cartilage degeneration and restore TMJ cartilage growth potential.
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Affiliation(s)
- Ruiye Bi
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qianli Li
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Haohan Li
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Peng Wang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Han Fang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xianni Yang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yiru Wang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yi Hou
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Binbin Ying
- Department of Stomatology, Ningbo First Hospital, Ningbo, China
| | - Songsong Zhu
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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Al-Tayar B, Al-Somairi MAA, ALshoaibi LH, Wang X, Wang J, Liu J, Al-Tayar B, An X, Si Q. Impact of molar teeth distalization by clear aligners on temporomandibular joint: a three-dimensional study. Prog Orthod 2023; 24:25. [PMID: 37455279 DOI: 10.1186/s40510-023-00474-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 05/15/2023] [Indexed: 07/18/2023] Open
Abstract
BACKGROUND Maxillary molar distalization is a common technique used in the non-extraction treatment of Angle Class II malocclusion that can effectively correct the molar relationship and create spaces for anterior teeth alignment. However, this approach may also impact the temporomandibular joint (TMJ) due to predictable changes in the posterior vertical dimension. Despite its widespread use, Class II malocclusions correction by molar distalization with clear aligners has not been investigated for their effects on the TMJ. Therefore, this study aimed to analyze the impact of sequential molar distalization using clear aligners on the TMJ. METHODS Three-dimensional CBCT scans of 23 non-growing patients (7 males, 16 females; mean age 29.8 ± 4.6 years) with skeletal class I or II malocclusion and a bilateral molar class II relationship treated by sequential upper molars distalization with orthodontic clear aligners (Invisalign, Align Technology, San Josè, Ca, USA). A total of 46 joints were examined before and after molar distalization using Anatomage InvivoDental 6.0.3. Linear and angular measurements of the mandibular joint were measured, including joint parameters, inclination, position, and the dimension of the condyle and articular fossa. In addition, 3D volumetric spaces of the joint were analyzed. All data were statistically analyzed by paired T test to determine the differences between the pre-and post-orthodontic procedures. RESULTS No statistically significant differences were found in all primary effects resulting from maxillary molars distalization by clear aligners on TMJ components measurements and joint spaces between T0 and T1. Meanwhile, statistically significant differences were observed in the linear position of the upper molars and the molar relationship parameter with at least P ≤ 0.05. CONCLUSION Treatment by sequential upper molars distalization with clear aligners does not lead to significant TMJ parameters changes in condyle and fossa spaces, dimensions, and positions.
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Affiliation(s)
- Barakat Al-Tayar
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China
- Orthodontics Division, Faculty of Medicine and Health Sciences, Taiz University, Taiz, Yemen
| | - Majedh A A Al-Somairi
- Orthodontics Department, School of Stomatology, China Medical University, Shenyang, 110000, China
| | - Lina H ALshoaibi
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China
| | - Xiaoli Wang
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China
| | - Junbin Wang
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China
| | - Jiajie Liu
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China
| | - Baher Al-Tayar
- Graduate Student of Dental Health Science, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
- Department of Dentistry, Faculty of Medical Sciences, Aljanad University for Science and Technology, Taiz, Yemen
| | - Xiaoli An
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China.
| | - Qingzong Si
- Department of Oral Medicine, School of Stomatology, Lanzhou University, Lanzhou, 730000, China
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Shao B, Li CX, Liu X, Pataer P, Gong ZC. Investigation of Morphologic Changes in Temporomandibular Joint With Anterior Disk Displacement Based on 3-Dimensional Reconstructive Imaging. J Craniofac Surg 2023; 34:1271-1277. [PMID: 36730117 DOI: 10.1097/scs.0000000000009139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 09/18/2022] [Indexed: 02/03/2023] Open
Abstract
The objective of this study was to measure the association between the disk position and condylar alteration in patients diagnosed with anterior disk displacement (ADD) of temporomandibular joint (TMJ). A retrospective cross-sectional study was designed, dividing into 4 groups: normal articular disk position (NADP) of unilateral ADD patients (n=10), ADD with reduction (ADDwR, n=16), ADD without reduction (ADDwoR, n=24), and healthy volunteers (HV, n=30) based on magnetic resonance imaging and cone-beam computed tomography. After morphologic parameters were calculated from 3-dimensional reconstructive images, differences in parameters with respect to ADD status were tested with analysis of variance and Fisher least significant difference multiple comparisons were performed. Condylar volume of ADDwR, ADDwoR, NADP, and HVs were 1768.29±404.19, 1467.13±438.20, 1814.48±753.60, and 1914.66±476.48 mm, respectively, showing a significant downward trend from healthy disk to a displaced one ( P <0.05). Same trend also found in condylar superficial area, with the condylar superficial area of the ADDwR, ADDwoR, NADP, and HVs were 842.56±138.78 mm, 748.52±157.42 mm, 842.87±263.00 mm, and 892.73±164.19 mm, respectively. From NADP to ADDwR to ADDwoR, superior joint space (SJS) was declined, [SJS (NADP) (2.10±0.91 mm) > SJS (ADDwR) (1.85±0.61 mm) > SJS (ADDwoR) (1.50±0.50 mm), P =0.034]; medial joint space was significantly associated with the different disk displacement types ( P(HV-ADDwR) =0.001; P(HV-ADDwoR) =0.021; P(NADP-ADDwR) =0.022; P(ADDwR-ADDwoR) =0.001). Our findings suggest that condylar volume and superficial area, and superior and medial joint space, albeit with a small sample size, are significantly associated with different disk displacement types, detection of which might therefore be worth exploring for assessing ADD.
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Affiliation(s)
- Bo Shao
- Oncological Department of Oral and Maxillofacial Surgery, Xinjiang Medical University Affiliated First Hospital, School of Stomatology, Stomatological Research Institute of Xinjiang Uygur Autonomous Region, Xinjiang Medical University, Urumqi, China
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Hikosaka Y, Koizumi S, Kim YI, Adel M, Nadim M, Hikita Y, Yamaguchi T. Comparison of Mandibular Volume and Linear Measurements in Patients with Mandibular Asymmetry. Diagnostics (Basel) 2023; 13:diagnostics13071331. [PMID: 37046549 PMCID: PMC10093347 DOI: 10.3390/diagnostics13071331] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/26/2023] [Accepted: 03/31/2023] [Indexed: 04/07/2023] Open
Abstract
In patients with mandibular asymmetry, the volume of the mandible divided by the mandibular median plane is significantly larger on the non-deviated (N-Dev) side than on the deviated (Dev) side. However, it has been reported that there is no significant difference between the volumes of the N-Dev and Dev sides when the mandibular ramus and body are divided. The purpose of this study was to investigate which region is responsible for the volume difference between the N-Dev and Dev sides. Cone Beam Computed Tomography (CBCT) images of patients with mandibular asymmetry were analyzed by measuring the volume, and linear analysis of the mandibular body, ramus, and condyle on the N-Dev and Dev side was performed. In this study, CBCT images of 37 patients (8 Japanese, 16 Korean, and 13 Egyptian) aged ≥ 18 years with mandibular asymmetry (men: 20, women: 17) were used to evaluate mandibular asymmetry. In patients with mandibular asymmetry, the N-Dev side showed significantly larger values than the Dev side for both volume and linear condyle, ramus, and mandibular body measurements. These results do not differ according to sex or ethnicity. Therefore, it is suggested that the N-Dev side of mandibular asymmetry is large without any regional specificity in pathophysiology.
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Affiliation(s)
- Yuki Hikosaka
- Department of Orthodontics, School of Dentistry, Kanagawa Dental University, Yokosuka 238-8580, Japan
| | - So Koizumi
- Department of Orthodontics, School of Dentistry, Kanagawa Dental University, Yokosuka 238-8580, Japan
| | - Yong-Il Kim
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan 50612, Republic of Korea
| | - Mohamed Adel
- Division of Orthodontics, College of Dentistry, University of Kentucky, Lexington, KY 40536, USA
| | - Mohamed Nadim
- Department of Orthodontics, Suez Canal University, Ismailia 41522, Egypt
| | - Yu Hikita
- Department of Orthodontics, School of Dentistry, Kanagawa Dental University, Yokosuka 238-8580, Japan
| | - Tetsutaro Yamaguchi
- Department of Orthodontics, School of Dentistry, Kanagawa Dental University, Yokosuka 238-8580, Japan
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Effects of osseous structure based on three-dimensional reconstructive imaging evaluation in the assessment of temporomandibular joint disc position. Clin Oral Investig 2023; 27:1449-1463. [PMID: 36877406 DOI: 10.1007/s00784-023-04936-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 02/24/2023] [Indexed: 03/07/2023]
Abstract
OBJECTIVES This pilot morphological study aimed to investigate the association between anterior disc displacement (ADD) and the status of the mandibular condyle and articular fossa. MATERIALS AND METHODS Thirty-four patients were divided into a normal articular disc position group and an ADD with and without reduction group. Images reconstructed were used to determine multiple group comparisons of these three different types of disc position, and the diagnostic efficacy for the morphological parameters with significant group difference was analyzed to assess. RESULTS The condylar volume (CV), condylar superficial area (CSA), superior joint space (SJS), and medial joint space (MJS) all exhibited obvious changes (P < 0.05). Additionally, they all had a reliable diagnostic accuracy in differentiating between normal disc position and ADD with an AUC value from 0.723 to 0.858. Among them, the CV, SJS, and MJS (P < 0.05) had a significantly positive impact on the groups by analysis of multivariate logistic ordinal regression model. CONCLUSIONS The CV, CSA, SJS, and MJS are significantly associated with different disc displacement types. The condyle in ADD exhibited altered dimensions. These could be promising biometric markers for assessing ADD. CLINICAL RELEVANCE The morphological changes of mandibular condyle and glenoid fossa were significantly influenced by the status of disc displacement, and condyles with disc displacement had three-dimensionally altered condylar dimensions, irrespective of age and sex.
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Rozeboom A, Schreurs R, Helmer L, Dubois L, Lobbezoo F, de Lange J. Volumetric outcomes of treatment for unilateral condylar fractures: A pilot study. ADVANCES IN ORAL AND MAXILLOFACIAL SURGERY 2023. [DOI: 10.1016/j.adoms.2023.100399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Li CX, Liu X, Gong ZC, Jumatai S, Ling B. Morphologic Analysis of Condyle among Different Disc Status in the Temporomandibular Joints by Three-dimensional Reconstructive Imaging: A Preliminary Study. BMC Oral Health 2022; 22:395. [PMID: 36096796 PMCID: PMC9465965 DOI: 10.1186/s12903-022-02438-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/07/2022] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES Morphological study is a common approach in the field of anterior disc displacement (ADD) pathology; however, analysis based on three-dimensional reconstructive imaging has not been investigated. This study investigated the association between ADD and the status of the mandibular condyle and articular fossa. METHODS Thirty-four patients were divided into three groups: normal articular disc position (NADP), anterior disc displacement with reduction (ADDwR), and anterior disc displacement without reduction (ADDwoR). Multiple grouped comparisons of three different disc statuses were performed by Kruskal-Wallis H test and variance analysis respectively. Receiver-operating characteristic curve was plotted to assess the diagnostic efficacy of the morphological parameters. Multivariate logistic regression analysis was used to investigate the interfering factors of ADD. RESULTS The condylar volume (CV) and condylar superficial area (CSA) in the NADP, ADDwR, and ADDwoR groups exhibited obvious changes (P < 0.05). Both CV and superior joint space (SJS) presented a good diagnostic accuracy for NADP-ADDwoR [area under the curve (AUC)CV = 0.813; AUCSJS = 0.855)], and ADDwR-ADDwoR (AUCCV = 0.858; AUCSJS = 0.801). CSA presented a good diagnostic accuracy for ADDwR-ADDwoR (AUC = 0.813). A multivariate logistic ordinal regression model showed that the CV [odds ratio (OR) = 1.011; regression coefficient (RC) = 0.011, P = 0.018], SJS (OR, 8.817; RC = 2.177; P < 0.001), and medial joint space (MJS) (OR, 1.492; RC = 0.400; P = 0.047) had a significantly impact on the groups. CONCLUSION CV, CSA, SJS, and MJS were significantly associated with the different disc status, and the condyle in ADD exhibited 3-dimensionally altered dimensions. They could be considered as promising biometric markers to assess the ADD.
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Affiliation(s)
- Chen-Xi Li
- Oncological Department of Oral and Maxillofacial Surgery, Xinjiang Medical University Affiliated First Hospital, No.137 Liyushan South Road, Urumqi, 830054, People's Republic of China. .,School of Stomatology, Xinjiang Medical University, Urumqi, 830011, People's Republic of China. .,Stomatological Research Institute of Xinjiang Uygur Autonomous Region, Urumqi, 830054, People's Republic of China.
| | - Xu Liu
- Oncological Department of Oral and Maxillofacial Surgery, Xinjiang Medical University Affiliated First Hospital, No.137 Liyushan South Road, Urumqi, 830054, People's Republic of China.,School of Stomatology, Xinjiang Medical University, Urumqi, 830011, People's Republic of China.,Stomatological Research Institute of Xinjiang Uygur Autonomous Region, Urumqi, 830054, People's Republic of China
| | - Zhong-Cheng Gong
- Oncological Department of Oral and Maxillofacial Surgery, Xinjiang Medical University Affiliated First Hospital, No.137 Liyushan South Road, Urumqi, 830054, People's Republic of China. .,School of Stomatology, Xinjiang Medical University, Urumqi, 830011, People's Republic of China. .,Stomatological Research Institute of Xinjiang Uygur Autonomous Region, Urumqi, 830054, People's Republic of China.
| | - Sakendeke Jumatai
- Department of Oral and Maxillofacial Radiology, Xinjiang Medical University Affiliated First Hospital, Urumqi, 830054, People's Republic of China.,School of Stomatology, Xinjiang Medical University, Urumqi, 830011, People's Republic of China.,Stomatological Research Institute of Xinjiang Uygur Autonomous Region, Urumqi, 830054, People's Republic of China
| | - Bin Ling
- Oncological Department of Oral and Maxillofacial Surgery, Xinjiang Medical University Affiliated First Hospital, No.137 Liyushan South Road, Urumqi, 830054, People's Republic of China.,School of Stomatology, Xinjiang Medical University, Urumqi, 830011, People's Republic of China.,Stomatological Research Institute of Xinjiang Uygur Autonomous Region, Urumqi, 830054, People's Republic of China
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12
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Analysis of the Volumetric Asymmetry of the Mandibular Condyles Using CBCT. Int Dent J 2022; 72:797-804. [PMID: 35931561 PMCID: PMC9676531 DOI: 10.1016/j.identj.2022.06.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/21/2022] [Accepted: 06/24/2022] [Indexed: 12/04/2022] Open
Abstract
Objectives The aim of this study was to analyse volumetric asymmetries between the right and left condyles in relation to age, gender, and dental status. Materials and methods A retrospective analysis of 150 cone beam computed tomography (CBCT) scans was conducted. A single investigator performed the volumetric analysis of the CBCT scans using Vesalius 3D software. The volumetric data were analysed in relation to the gender, age, and dental status. Results The mean right condylar volume was significantly higher (P < .01) than the left condylar volume. Right and left condylar volumes were significantly higher (P < .01) in male study participants when compared to female study participants. There was no significant difference (P = .47) in the volumetric asymmetry between the male and female study participants. The volumetric asymmetry was significantly higher (P < .01) in the older age groups when compared to the younger age groups. The volumetric asymmetry was significantly higher (P < .01) in the partially and completely edentulous patients when compared to the dentate study participants. The condylar volume on the side having a partially edentulous area was significantly lower than the condylar volume of the contralateral dentate side (P < .001). Conclusions The volumetric asymmetry between the right and left condyle significantly increases with age and edentulousness. The result of the study encourages the clinicians to perform volumetric evaluation of the condyles in cases of radiographically evident condylar asymmetries to obtain a more accurate diagnosis.
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13
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Al-Hadad SA, ALyafrusee ES, Abdulqader AA, Al-Gumaei WS, Al-Mohana RAAM, Ren L. Comprehensive three-dimensional positional and morphological assessment of the temporomandibular joint in skeletal Class II patients with mandibular retrognathism in different vertical skeletal patterns. BMC Oral Health 2022; 22:149. [PMID: 35484618 PMCID: PMC9052647 DOI: 10.1186/s12903-022-02174-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 04/08/2022] [Indexed: 12/15/2022] Open
Abstract
Background Only a few studies have used 3D cone-beam computed tomography (CBCT) analysis to evaluate the positional and morphological characteristics of the temporomandibular joint (TMJ) in adults with skeletal Class II. No studies have focused on the case of skeletal Class II with mandibular retrognathism in different vertical skeletal patterns. As a result, this study aimed to evaluate and compare the position and morphology of TMJ in adults with skeletal Class II with mandibular retrognathism in different vertical skeletal patterns to the position and morphology of TMJ in the normal Chinese adult population in three dimensions. Methods This retrospective study analyzed CBCT images of 80 adult patients. Subjects with skeletal Class II with a normal sagittal position of the maxilla and mandibular retrognathism were classified according to the mandibular angle and facial height ratio into three groups of 20 subjects each: hypodivergent, normodivergent, and hyperdivergent groups, as well as a control group of 20 subjects. The following 3D measurements of TMJ were evaluated: (1) position, parameters, and inclination of the mandibular fossa; (2) position, parameters, and inclination of the mandibular condyle; (3) condyle centralization in their respective mandibular fossae; (4) anterior, posterior, superior, and medial joint spaces; and (5) 3D volumetric measurements of the TMJ spaces. Measurements were statistically analyzed by one-way ANOVA test, followed by Tukey’s post hoc test. Results Significant differences were found in the hyperdivergent and hypodivergent groups compared with the normal group in the vertical and anteroposterior mandibular fossa position, vertical condylar inclination, and condylar width and length. The hyperdivergent group showed the significantly highest condylar inclination with the midsagittal plane; anterior and superior positioning of the condyle; smallest anterior, superior, and medial joint spaces; and largest volumetric total joint space relative to the two other groups. Conclusions The condyle-fossa position and morphology differ with various vertical facial patterns in individuals with skeletal Class II mandibular retrognathism. These differences could be considered during TMD diagnosis and orthodontic treatment. Supplementary Information The online version contains supplementary material available at 10.1186/s12903-022-02174-6.
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Affiliation(s)
- Saba Ahmed Al-Hadad
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, China
| | - Enas Senan ALyafrusee
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, China.,Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Ibb University, Ibb, Republic of Yemen
| | - Abbas Ahmed Abdulqader
- Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | | | - Rana A A M Al-Mohana
- Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Ibb University, Ibb, Republic of Yemen.,Department of Orthodontics, Affiliated Stomatological Hospital of Jiamusi University, Jiamusi, China
| | - Liling Ren
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, China.
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14
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Chang MS, Choi JH, Yang IH, An JS, Heo MS, Ahn SJ. Association between Condylar Bone Density and Disk Displacement in the Temporomandibular Joint. J Clin Densitom 2022; 25:215-222. [PMID: 34391639 DOI: 10.1016/j.jocd.2021.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 11/22/2022]
Abstract
Measuring bone density (BD) is a common method of determining bone quality; however, the relationship between condylar BD and the occurrence of temporomandibular joint (TMJ) disorders has not been investigated. To address this knowledge gap, we aimed to investigate condylar BD in terms of TMJ disk displacement (TMJ DD) using computed tomography (CT) and magnetic resonance imaging (MRI). We classified TMJ MRI results according to the position of the disk: normal disk position (Normal), anterior disk displacement with reduction (ADDR), and anterior disk displacement without reduction (ADDNR). After retrospectively evaluating 86 female condyles, we determined the total, cortical, and trabecular BD in the upper-joint portion of the condyle and the whole condyle using CT data. To standardize condylar BD, we calculated the BD ratios by dividing the condylar BD by the cervical axis BD. The Kruskal-Wallis test analyzed the differences in BD measurements in the TMJ DD patient groups and showed significant between-group differences in condylar BD. The total and trabecular BD was significantly higher in ADDNR condyles than in Normal or ADDR condyles (Normal = ADDR < ADDNR). However, there was no significant difference in the cortical BD among the three TMJ DD groups. The BD ratios showed a similar tendency with condylar BD. These results suggest that increased condylar BD - specifically total and trabecular BD - may be significantly associated with ADDNR condyles. Our findings will help clinicians determine the course of treatment for patients with disk-related TMJ disorders.
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Affiliation(s)
- Min-Seok Chang
- Department of Orthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Jeong-Ho Choi
- Department of Orthodontics, Seoul National University Dental Hospital, Seoul, Korea
| | - Il-Hyung Yang
- Department of Orthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Jung-Sub An
- Department of Orthodontics, Seoul National University Dental Hospital, Seoul, Korea
| | - Min-Suk Heo
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Sug-Joon Ahn
- Department of Orthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.
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Huo J, Liu Y, Yang X, Wang Q. Inclination of the osseous components of the temporomandibular joint related with disc displacement: Magnetic resonance and cone beam computed tomography imaging-based study. Cranio 2022:1-10. [PMID: 35157556 DOI: 10.1080/08869634.2022.2036438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
OBJECTIVE To assess the association between three-dimensional inclination of the osseous structures of temporomandibular joints (TMJ) and the risk of disc displacement (DD). METHODS The 120 TMJs of 60 patients were evaluated. According to magnetic resonance images, disc position was classified as normal, anterior DD with reduction (ADDWR) and without reduction (ADDWoR) and as normal, medial DD (MDD), and lateral DD (LDD) on the sagittal and coronal views, respectively. Condyle and eminence inclinations were measured using cone beam computed tomography. RESULTS Smaller horizontal condylar inclination was associated with ADDWoR (p < 0.05). Larger coronal condylar inclination was associated with ADDWR (p < 0.05) and LDD (p < 0.05). There was no association between sagittal eminence inclination and DD (p < 0.05). CONCLUSION Medial condylar rotation in the axial view may be associated with ADDWoR. The condyle head horizontally inclined in the coronal view may be associated with ADDWR and LDD.
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Affiliation(s)
- Jingyi Huo
- Department of Stomatology, Peking Union Medical College Hospital, Beijing, China
| | - Yuebo Liu
- Department of Stomatology, Peking Union Medical College Hospital, Beijing, China
| | - Xianrui Yang
- Department of Orthodontics, State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qi Wang
- Department of Stomatology, Peking Union Medical College Hospital, Beijing, China
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16
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Morphometric Analysis of the Glenoid Fossa in the Skull Base. J Craniofac Surg 2021; 33:319-321. [PMID: 34191767 PMCID: PMC8694248 DOI: 10.1097/scs.0000000000007808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The aim of this study was to investigate the possible relationship between disc displacement and the presence of reduction by comparing condyle anteroposterior (AP) diameter, condyle height, mandibular fossa AP diameter, and mandibular fossa depth.
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17
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Lentzen MP, Riekert M, Buller J, Grandoch A, Zirk M, Zoeller JE, Kreppel M. A volumetric study of mandibular condyles in orthognathic patients by semiautomatic segmentation. Oral Maxillofac Surg 2021; 26:205-212. [PMID: 34114116 PMCID: PMC9162966 DOI: 10.1007/s10006-021-00976-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 05/26/2021] [Indexed: 11/28/2022]
Abstract
Purpose This study was conducted to elucidate volumetric data of mandibular condyles of orthognathic patients by analyzing cone beam computed tomography images based upon semiautomatic segmentation. Methods Cone beam computed tomography images of 87 patients with malocclusions were analyzed in this retrospective study. Patients were between 17 and 53 years old and diagnosed with Angle class I, II, or III malocclusion. By using the validated open-source software “ITK-SNAP,” the volumetric measurements of 174 mandibular condyles were performed. Volumetric analysis was performed according to intra-subject side differences by paired Student t test. In accordance to inter-subject side, gender, age and type of malocclusion differences bivariate analysis and ANOVA were applied. Results The mean volume for the right condyle was 1.378 ± 0.447 cm3, with a maximum of 2.379 cm3 and a minimum of 0.121 cm3. The mean volume for the left side was 1.435 ± 0.474 cm3, with a maximum of 3.264 cm3 and a minimum of 0.109 cm3. Bivariate analysis indicated a highly significant inter-subject difference between the volume of the left and right mandibular condyles (p < 0.01). Females had a significantly smaller condyle volume than males (p < 0.05 left condyle; p < 0.01 right condyle). Conclusion The fact that shape and volume of mandibular condyles show a high susceptibility to pathological alterations and particularly malocclusions makes a precise knowledge about volumetric changes indispensable. Our results show that significant inter-subject differences in condyle volume could be found with respect to the side and gender. Larger volumes could be assessed for the left condyle and for male patients.
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Affiliation(s)
- Max-Philipp Lentzen
- Department for Oral and Craniomaxillofacial and Plastic Surgery, University Hospital Cologne and Faculty of Medicine, University of Cologne, Kerpener Straße 62, 50937, Cologne, Germany.
| | - Maximilian Riekert
- Department for Oral and Craniomaxillofacial and Plastic Surgery, University Hospital Cologne and Faculty of Medicine, University of Cologne, Kerpener Straße 62, 50937, Cologne, Germany
| | - Johannes Buller
- Department for Oral and Craniomaxillofacial and Plastic Surgery, University Hospital Cologne and Faculty of Medicine, University of Cologne, Kerpener Straße 62, 50937, Cologne, Germany
| | - Andrea Grandoch
- Department for Oral and Craniomaxillofacial and Plastic Surgery, University Hospital Cologne and Faculty of Medicine, University of Cologne, Kerpener Straße 62, 50937, Cologne, Germany
| | - Matthias Zirk
- Department for Oral and Craniomaxillofacial and Plastic Surgery, University Hospital Cologne and Faculty of Medicine, University of Cologne, Kerpener Straße 62, 50937, Cologne, Germany
| | - Joachim E Zoeller
- Department for Oral and Craniomaxillofacial and Plastic Surgery, University Hospital Cologne and Faculty of Medicine, University of Cologne, Kerpener Straße 62, 50937, Cologne, Germany
| | - Matthias Kreppel
- Department for Oral and Craniomaxillofacial and Plastic Surgery, University Hospital Cologne and Faculty of Medicine, University of Cologne, Kerpener Straße 62, 50937, Cologne, Germany
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18
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de Oliveira Reis L, Fontenele RC, Devito KL, Cunha KS, Domingos ADC. Evaluation of the dimensions, morphology, and position of the mandibular condyles in individuals with neurofibromatosis 1: a case-control study. Clin Oral Investig 2021; 26:159-169. [PMID: 34050829 DOI: 10.1007/s00784-021-03985-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 05/10/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the mandibular condyles of neurofibromatosis 1 (NF1) individuals without facial plexiform neurofibroma using cone beam computed tomography images. MATERIALS AND METHODS Eighty cone beam computed tomography scans (160 mandibular condyles) were analyzed: 40 from NF1 individuals (study group) and 40 from individuals without NF1 (control group). The anteroposterior and mediolateral dimensions, height, and volume of the mandibular condyles were measured. The mandibular condyles were classified according to their morphology: healthy (absence of morphological changes), with flattening (loss of rounded contour of at least one of the surfaces), with erosion (loss of continuity of the cortical bone), with osteophyte (exophytic formation of the condyle surface), and with sclerosis (any increase in the cortical thickness in the load-bearing areas). Furthermore, the position of the mandibular condyles in relation to the joint fossa in an anteroposterior view was classified as anterior, concentric, or posterior. RESULTS The study group had a higher anteroposterior dimension of the mandibular condyles compared with the control group (p < 0.05). There were no differences in condylar morphology and position between both groups (p > 0.05). The morphological alterations were not associated with sex or age in any group evaluated (p > 0.05). For both groups, the concentric position was the most common. For the study group, there was a significant difference in the condylar position between the sides (p < 0.05). CONCLUSIONS NF1 individuals without facial plexiform neurofibroma present a high prevalence of condyles with a large anteroposterior dimension and asymmetric position in the joint fossa. However, no morphological and volumetric changes were observed in the mandibular condyles of them. CLINICAL RELEVANCE The knowledge of the TMJ alterations in individuals with NF1 is important to establish an evaluation protocol, which would allow early intervention if indicated.
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Affiliation(s)
- Larissa de Oliveira Reis
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
| | - Rocharles Cavalcante Fontenele
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Karina Lopes Devito
- Department of Dental Clinic, School of Dentistry, Federal University of Juiz de Fora (UFJF), Juiz de Fora, Minas Gerais, Brazil
| | - Karin Soares Cunha
- Department of Pathology, School of Medicine, Universidade Federal Fluminense (UFF), Niterói, Rio de Janeiro, Brazil
| | - Andréa de Castro Domingos
- Department of Oral Pathology and Diagnosis, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Rio de Janeiro, Brazil
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Dalewski B, Kaczmarek K, Jakubowska A, Szczuchniak K, Pałka Ł, Sobolewska E. COL12A1 Single Nucleotide Polymorphisms rs240736 and rs970547 Are Not Associated with Temporomandibular Joint Disc Displacement without Reduction. Genes (Basel) 2021; 12:genes12050690. [PMID: 34062975 PMCID: PMC8148001 DOI: 10.3390/genes12050690] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 04/29/2021] [Accepted: 05/01/2021] [Indexed: 12/13/2022] Open
Abstract
Temporomandibular disorders (TMDs) may affect up to 25% of the population, with almost 70% of these TMD cases developing malpositioning of the disc over time in what is known as internal derangement (ID). Despite significant efforts, the molecular mechanism underlying disease progression is not yet very well known. In this study, the role of COL12A1 rs970547 and rs240736 polymorphisms as potential genetic factors regulating ID was investigated. The study included 124 Caucasian patients of both sexes after disc displacement without reduction (DDwoR) in either one or two temporomandibular joints (TMJs), either of which meet the criteria for this condition. All patients underwent clinical examination and 3D digital imaging. The COL12A1 rs970547 and rs240736 polymorphisms were evaluated. There were no statistically significant differences in the chi-square test between the study group and healthy controls. The examined COL12A1 rs240736 and rs970547 polymorphisms do not contribute to DDwoR in Polish Caucasians.
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Affiliation(s)
- Bartosz Dalewski
- Department of Dental Prosthetics, Pomeranian Medical University, 70-111 Szczecin, Poland; (B.D.); (E.S.)
| | - Katarzyna Kaczmarek
- Department of Genetics and Pathology, Pomeranian Medical University, 71-252 Szczecin, Poland; (K.K.); (A.J.)
| | - Anna Jakubowska
- Department of Genetics and Pathology, Pomeranian Medical University, 71-252 Szczecin, Poland; (K.K.); (A.J.)
- Independent Laboratory of Molecular Biology and Genetic Diagnostics, Pomeranian Medical University, 71-252 Szczecin, Poland
| | - Kamila Szczuchniak
- Department of Dental Prosthetics, Outpatient Dental Clinic, Pomeranian Medical University, 70-111 Szczecin, Poland
- Correspondence:
| | | | - Ewa Sobolewska
- Department of Dental Prosthetics, Pomeranian Medical University, 70-111 Szczecin, Poland; (B.D.); (E.S.)
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Seo BY, Huh KH, An JS, Chang MS, Ahn SJ. Relationship of computed tomography-verified degenerative condylar morphology with temporomandibular joint disk displacement and sex. Oral Surg Oral Med Oral Pathol Oral Radiol 2021; 132:93-103. [PMID: 34006488 DOI: 10.1016/j.oooo.2021.03.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 03/24/2021] [Accepted: 03/29/2021] [Indexed: 12/17/2022]
Abstract
OBJECTIVE This study investigated the association of computed tomography (CT)-verified degenerative condylar changes with disk displacement (DD) and sex. STUDY DESIGN Multidetector CT and cone beam CT scans of 165 condyles were evaluated for erosion, osteophyte formation, flattening, subcortical sclerosis, generalized sclerosis, subcortical defects, and loose joint bodies. Disk position was determined using magnetic resonance imaging. The association of degenerative alterations with disk position and sex was analyzed. RESULTS The risks of erosion, osteophyte formation, and flattening were significantly increased by 3.72, 9.00, and 6.35 times, respectively, in the joints with DD without reduction (DDNR); however, the risks of these changes did not increase significantly in joints with DD with reduction. The risks of extensive erosion and slight and moderate osteophyte formation significantly increased only in the joints with DDNR. The degenerative changes were more likely to exist together in the joints with DDNR than in those with a normal disk position. The association of DD and most degenerative morphologies was not significantly influenced by sex. CONCLUSIONS Erosion, osteophyte formation, and flattening were significantly associated with DDNR, regardless of sex.
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Affiliation(s)
- Bo-Yeon Seo
- Graduate Student, Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Korea
| | - Kyung-Hoe Huh
- Professor, Dental Research Institute and Department of Oral and Maxillofacial Radiology, School of Dentistry, Seoul National University, Seoul, Korea
| | - Jung-Sub An
- Clinical Professor, Department of Orthodontics, Seoul National University Dental Hospital, Seoul, Korea
| | - Min-Seok Chang
- Graduate Student, Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Korea
| | - Sug-Joon Ahn
- Professor, Dental Research Institute and Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Korea.
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Park SH, Han WJ, Chung DH, An JS, Ahn SJ. Relationship between rotational disc displacement of the temporomandibular joint and the dentoskeletal morphology. Korean J Orthod 2021; 51:105-114. [PMID: 33678626 PMCID: PMC7940809 DOI: 10.4041/kjod.2021.51.2.105] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 03/17/2020] [Accepted: 03/25/2020] [Indexed: 01/08/2023] Open
Abstract
Objective The purpose of this study was to evaluate the relationship between rotational disk displacement (DD) of the temporomandibular joint (TMJ) and the dentoskeletal morphology. Methods Women aged > 17 years were included in this study. Each subject had a primary complaint of malocclusion and underwent routine cephalometric examinations. They were divided into five groups according to the findings on sagittal and coronal magnetic resonance images of their TMJs bilateral normal disk position, bilateral anterior DD with reduction (ADDR), bilateral rotational DD with reduction (RDDR), bilateral anterior DD without reduction (ADDNR), and bilateral rotational DD without reduction (RDDNR). Twenty-three cephalometric variables were analyzed, and the Kruskal–Wallis test was used to evaluate differences in the dentoskeletal morphology among the five groups. Results Patients with TMJ DD exhibited a hyperdivergent pattern with a retrognathic mandible, unlike those with a normal disk position. These specific skeletal characteristics were more severe in patients exhibiting DD without reduction than in those with reduction, regardless of the presence of rotational DD. Rotational DD significantly influenced horizontal and vertical skeletal patterns only in the stage of DD with reduction, and the mandible exhibited a more backward position and rotation in patients with RDDR than in those with ADDR. However, there were no significant dentoskeletal differences between ADDNR and RDDNR. Conclusions The results of this study suggest that rotational DD of TMJ plays an important role in the dentoskeletal morphology, particularly in patients showing DD with reduction.
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Affiliation(s)
- So-Hyun Park
- Department of Orthodontics, Dankook University Jukjeon Dental Hospital, Yongin, Korea
| | - Won-Jeong Han
- Department of Oral and Maxillofacial Radiology, College of Dentistry, Dankook University, Cheonan, Korea
| | - Dong-Hwa Chung
- Department of Orthodontics, College of Dentistry, Dankook University, Cheonan, Korea
| | - Jung-Sub An
- Department of Orthodontics, Seoul National University Dental Hospital, Seoul, Korea
| | - Sug-Joon Ahn
- Dental Research Institute and Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Korea
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Association of Estrogen Receptor 1 and Tumor Necrosis Factor α Polymorphisms with Temporomandibular Joint Anterior Disc Displacement without Reduction. DISEASE MARKERS 2020; 2020:6351817. [PMID: 33101543 PMCID: PMC7576356 DOI: 10.1155/2020/6351817] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 09/02/2020] [Accepted: 09/22/2020] [Indexed: 12/20/2022]
Abstract
Objectives The aim of this study was to investigate the role of ESR1 rs1643821 and TNF-α rs1800629 as potential genetic factors regulating anterior disc displacement without reduction-mediated inflammatory pathway. Background The temporomandibular joint is a complex synovial joint that allows mandibular movement in three directions. Although temporomandibular disorders are widespread, limited data is available on the biochemical characteristics of the displaced disc and quality of the surrounding soft tissue. Changes in degenerative tissue provoke disc displacement which involves secretion of inflammatory markers and sequential conversion of fibroblast-like cells into chondrocyte-like cells. Due to the high occurrence in female adolescents, the potential role of sex hormones in temporomandibular joint disorders has been speculated. Furthermore, anterior disc displacement without reduction severely affects the quality of life. Methods 124 Caucasian patients with a history of at least one anterior disc displacement without reduction within 3 months were enrolled. Anterior disc displacement without reduction was diagnosed based on clinical examination, diagnostic criteria (DC)/TMD, and cone-beam computed tomography/magnetic resonance imaging (CBCT/MRI). The control group consisted of 126 patients with no temporomandibular joint disorders. Genotyping of two single nucleotide polymorphisms, estrogen receptor 1 (ESR1) rs1643821, and tumor necrosis factor α (TNF-α) rs1800629 was performed. Results ESR1 rs1643821 showed significant P values (using chi-square analysis) revealing the difference in anterior disc displacement without reduction frequencies while TNF-α rs1800629 polymorphism was found to be statistically insignificant when compared to the control group. Furthermore, patients with a genotype of ESR1 rs1643821 showed a decreased probability (OR = 0.412) against anterior disc displacement without reduction when compared to the GG genotype (OR = 1). Conclusion ESR1 rs1643821 with A allele frequency was lower in patients with anterior disc displacement without reduction compared to the control group. Thus, the rs1643821 variant is significantly associated with susceptibility to the anterior disc displacement without a reduction in European Caucasians. Conversely, TNF-α rs1800629 was a statistically insignificant factor against anterior disc displacement without reduction when compared to the control group.
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Altan Şallı G, Öztürkmen Z. Semi-automated three-dimensional volumetric evaluation of mandibular condyles. Oral Radiol 2020; 37:66-73. [PMID: 32020494 DOI: 10.1007/s11282-020-00426-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/24/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The aim of this study is to research the mandibular condyle volumes of the Turkish subpopulation by sex, age, laterality, and posterior occlusal support, to provide volumetric data for young and old patient groups. METHODS The CBCT images of 690 condyles from 345 patients (165 females and 180 males) were assessed. Patients aged 18-25 years were chosen for the younger group, and 45-70 years for the older group. The dental statuses of the older patient group were divided into three categories, based on the Eichner index. All the CBCT images were transferred to the three-dimensional volumetric analysis software, ITK-Snap (Penn Image Computing and Science Laboratory (PICSL) at the University of Pennsylvania and Scientific Computing and Imaging Institute (SCI) at the University of Utah) and analyzed with sagittal, coronal, and axial sections. Mandibular condyles were defined using semi-automatic segmentation, then manual segmentation was performed to ensure accuracy. Analyses were performed using MedCalc statistical software. The p value < 0.05 was considered statistically significant. RESULTS The mean right condyle volume for the whole sample (n = 345) was 1678.8 mm3 and the left condyle volume was 1661.3 mm3. Males had a larger condyle volume than females in both the younger and older patient groups (p = 0.035, p < 0.01, respectively). The Eichner index did not correlate significantly with condylar volume in the older patient group (p = 0.134, p = 0.122). CONCLUSION There were significant differences between the volumes of mandibular condyles for different sex, while there were no significant differences in relation to age, laterality, and posterior occlusal support.
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Affiliation(s)
- Gülay Altan Şallı
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Beykent University, Avalon Campus, F416, Beylikduzu, Istanbul, Turkey.
| | - Zeynep Öztürkmen
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Biruni University, Istanbul, Turkey
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Seo BY, An JS, Chang MS, Huh KH, Ahn SJ. Changes in condylar dimensions in temporomandibular joints with disk displacement. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 129:72-79. [DOI: 10.1016/j.oooo.2019.04.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 03/13/2019] [Accepted: 04/12/2019] [Indexed: 12/13/2022]
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Cagna DR, Donovan TE, McKee JR, Eichmiller F, Metz JE, Albouy JP, Marzola R, Murphy KR, Troeltzsch M. Annual review of selected scientific literature: A report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry. J Prosthet Dent 2019; 122:198-269. [PMID: 31405523 DOI: 10.1016/j.prosdent.2019.05.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 12/13/2022]
Abstract
This comprehensive review of the 2018 dental literature is provided to inform busy dentists about progress in the profession. Developed by the Committee on Scientific Investigation of the American Academy of Restorative Dentistry, each author brings discipline-specific expertise to one of the 8 sections of the report including (1) prosthodontics; (2) periodontics, alveolar bone, and peri-implant tissues; (3) implant dentistry; (4) dental materials and therapeutics; (5) occlusion and temporomandibular disorders; (6) sleep-related breathing disorders; (7) oral medicine and oral and maxillofacial surgery; and (8) dental caries and cariology. The report targets important information that will likely influence day-to-day treatment decisions. Each review is not intended to stand alone but to update interested readers so that they may visit source materials if greater detail is desired. As the profession continues its march toward evidence-based clinical decision-making, an already voluminous library of potentially valuable dental literature continues to grow. It is the intention of this review and its authors to provide assistance in navigating the extensive dental literature published in 2018. It is our hope that readers find this work useful in the clinical management of patients moving forward.
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Affiliation(s)
- David R Cagna
- Professor, Associate Dean, and Residency Director, Department of Prosthodontics, University of Tennessee Health Sciences Center, College of Dentistry, Memphis, Tenn.
| | - Terence E Donovan
- Professor and Head of Biomaterials, Department of Restorative Sciences, University of North Carolina School of Dentistry, Chapel Hill, NC
| | - James R McKee
- Private practice, Restorative Dentistry, Downers Grove, Ill
| | | | - James E Metz
- Private practice, Restorative Dentistry, Columbus, Ohio
| | - Jean-Pierre Albouy
- Assistant Professor, Department of Restorative Sciences, University of North Carolina School of Dentistry, Chapel Hill, NC
| | | | - Kevin R Murphy
- Associate Clinical Professor, Department of Periodontics, University of Maryland College of Dentistry, Baltimore, MD; Private practice, Periodontics and Prosthodontics, Baltimore, MD
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Poluha RL, Canales GDLT, Costa YM, Grossmann E, Bonjardim LR, Conti PCR. Temporomandibular joint disc displacement with reduction: a review of mechanisms and clinical presentation. J Appl Oral Sci 2019; 27:e20180433. [PMID: 30810641 PMCID: PMC6382319 DOI: 10.1590/1678-7757-2018-0433] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 10/02/2018] [Indexed: 11/25/2022] Open
Abstract
Disc displacement with reduction (DDWR) is one of the most common intra-articular disorders of the temporomandibular joint (TMJ). Factors related to the etiology, progression and treatment of such condition is still a subject of discussion. This literature review aimed to address etiology, development, related factors, diagnosis, natural course, and treatment of DDWR. A non-systematic search was conducted within PubMed, Scopus, SciELO, Medline, LILACS and Science Direct using the Medical Subjective Headings (MeSH) terms “temporomandibular disorders”, “temporomandibular joint”, “disc displacement” and “disc displacement with reduction”. No time restriction was applied. Literature reviews, systematic reviews, meta-analysis and clinical trials were included. DDWR is usually asymptomatic and requires no treatment, since the TMJ structures adapt very well and painlessly to different disc positions. Yet, long-term studies have shown the favorable progression of this condition, with no pain and/or jaw locking occurring in most of the patients.
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Affiliation(s)
- Rodrigo Lorenzi Poluha
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese, Grupo de Dor Orofacial de Bauru, Bauru, São Paulo, Brasil
| | - Giancarlo De la Torre Canales
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese, Grupo de Dor Orofacial de Bauru, Bauru, São Paulo, Brasil
| | - Yuri Martins Costa
- Universidade de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Ciências Fisiológicas, Piracicaba, São Paulo, Brasil
| | - Eduardo Grossmann
- Universidade Federal do Rio Grande do Sul, Faculdade de Odontologia, Departamento de Ciências Morfológicas, Porto Alegre, Rio Grande do Sul, Brasil
| | - Leonardo Rigoldi Bonjardim
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Ciências Biológicas, Seção de Fisiologia da Cabeça e da Face, Bauru, São Paulo, Brasil
| | - Paulo César Rodrigues Conti
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese, Grupo de Dor Orofacial de Bauru, Bauru, São Paulo, Brasil
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Balanta-Melo J, Torres-Quintana MA, Bemmann M, Vega C, González C, Kupczik K, Toro-Ibacache V, Buvinic S. Masseter muscle atrophy impairs bone quality of the mandibular condyle but not the alveolar process early after induction. J Oral Rehabil 2018; 46:233-241. [PMID: 30468522 DOI: 10.1111/joor.12747] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 11/15/2018] [Accepted: 11/17/2018] [Indexed: 12/27/2022]
Abstract
BACKGROUND Masseter muscle function influences mandibular bone homeostasis. As previously reported, bone resorption markers increased in the mouse mandibular condyle two days after masseter paralysis induced with botulinum toxin type A (BoNTA), followed by local bone loss. OBJECTIVE This study aimed to evaluate the bone quality of both the mandibular condyle and alveolar process in the mandible of adult mice during the early stage of a BoNTA-induced masseter muscle atrophy, using a combined 3D histomorphometrics and shape analysis approach. METHODS Adult BALB/c mice were divided into an untreated control group and an experimental group; the latter received one single BoNTA injection in the right masseter (BoNTA-right) and saline in the left masseter (Saline-left). 3D bone microstructural changes in the mandibular condyle and alveolar process were determined with high-resolution microtomography. Additionally, landmark-based geometric morphometrics was implemented to assess external shape changes. RESULTS After 2 weeks, masseter mass was significantly reduced (P-value <0.001). When compared to Saline-left and untreated condyles, BoNTA-right condyles showed significant bone loss (P-value <0.001) and shape changes. No significant bone loss was observed in the alveolar processes of any of the groups (P-value >0.05). CONCLUSION Condyle bone quality deteriorates at an early stage of BoNTA-induced masseter muscle atrophy, and before the alveolar process is affected. Since the observed bone microstructural changes resemble those in human temporomandibular joint degenerative disorders, the clinical safety of BoNTA intervention in the masticatory apparatus remains to be clarified.
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Affiliation(s)
- Julián Balanta-Melo
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,School of Dentistry, Universidad del Valle, Cali, Colombia.,Max Planck Weizmann Center for Integrative Archaeology and Anthropology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | | | - Maximilian Bemmann
- Max Planck Weizmann Center for Integrative Archaeology and Anthropology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Carolina Vega
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | | | - Kornelius Kupczik
- Max Planck Weizmann Center for Integrative Archaeology and Anthropology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.,Center for Quantitative Analysis in Dental Anthropology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Viviana Toro-Ibacache
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Center for Quantitative Analysis in Dental Anthropology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Sonja Buvinic
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Center for Exercise, Metabolism and Cancer Studies CEMC2016, Faculty of Medicine, Universidad de Chile, Santiago, Chile
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Donovan TE, Marzola R, Murphy KR, Cagna DR, Eichmiller F, McKee JR, Metz JE, Albouy JP, Troeltzsch M. Annual review of selected scientific literature: A report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry. J Prosthet Dent 2018; 120:816-878. [DOI: 10.1016/j.prosdent.2018.09.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 09/24/2018] [Indexed: 02/08/2023]
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Jiao Z, Wang X, Zhang X, Yang C. Experimental study on mandibular length and facial symmetry of low estrogen level and anterior disc displacement of temporomandibular joint. Sci Rep 2018; 8:15635. [PMID: 30353020 PMCID: PMC6199334 DOI: 10.1038/s41598-018-34023-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 09/28/2018] [Indexed: 02/06/2023] Open
Abstract
This study was aimed at elucidating the changes of mandible symmetry in a rabbit model with low estrogen levels induced by ovariectomy (OVX) combined with temporomandibular joint (TMJ) anterior disc displacement without reduction (ADDWoR). 32 growing rabbits were randomly allocated into 4 groups; OVX group, ADDWoR group, OVX+ ADDWoR group and control group. In OVX and OVX+ ADDWoR groups, bilateral OVX was performed and then the serum level of 17β-estradiol was evaluated every week. In ADDWoR group and OVX+ ADDWoR group, the right TMJ was surgically opened and the disc was displaced anteriorly and the left TMJ was also surgically opened and closed without any manipulation of the disc. All rabbits had CT scan before and at the end of the study and the mandible measurements were performed on the 3D-reconstructed model. The mandible in ADDWoR group was consistently shorter on the right side resulting in a midline shift to the ipsilateral side. While in OVX+ ADDWoR group, the mandibular length of the right side was more shorter than in ADDWoR group, moreover, mandibular deviation was therefore more severe. In OVX group, there was no difference regarding the length of mandible compared to the control group. There was no difference regarding the mandibular length between left and right sides in the control group.
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Affiliation(s)
- Zixian Jiao
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Xiangyu Wang
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Xiaohu Zhang
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China.
| | - Chi Yang
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China.
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