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Li T, Peng S, Zhao Y, Zhou J, Dai H, Wu Y. The short- and long-term effects of congenital occlusion loss of the unilateral first permanent molar on the temporomandibular joint morphology and position: A retrospective study based on cone-beam computed tomography. Orthod Craniofac Res 2024; 27:635-644. [PMID: 38512245 DOI: 10.1111/ocr.12780] [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: 11/23/2023] [Revised: 02/26/2024] [Accepted: 03/12/2024] [Indexed: 03/22/2024]
Abstract
OBJECTIVE To investigate the effects of congenital unilateral first permanent molar occlusal loss (CUMOL) on the morphology and position of temporomandibular joint (TMJ). MATERIALS AND METHODS Cone-beam computed tomography (CBCT) images of 37 patients with CUMOL (18 males and 19 females, mean age: 13.60 ± 4.38 years) were divided into two subgroups according to the status of second molar (G1: the second molar not erupted, n = 18, G2: second molar erupted, n = 19). The control group consisted of 33 normal occlusion patients (9 males and 24 females, mean age: 16.15 ± 5.44 years) and was divided into 2 subgroups accordingly (G3: the second molar had not erupted, n = 18, G4: the second molar had erupted and made contact with the opposing tooth, n = 15). Linear and angular measurements were used to determine the characteristics of TMJ. RESULTS In G1, the condyle on the side of the CUMOL shifts posteriorly, with significant side differences observed in Anterior space (AS, P < .05) and Posterior space (PS, P < .05). However, with the eruption of the second permanent molars, in G2, the condyle on the CUMOL side moves posteriorly and inferiorly. This results in significant lateral differences in the AS (P < .05), PS (P < .05), and Superior space (SS, P < .05). Additionally, there is an increase in the thickness of the roof of the glenoid fossa (TRF) on the CUMOL side (P < .05), and a decrease in the inclination of the bilateral articular eminences (P < .05). CONCLUSIONS CUMOL can affect the position and the morphology of the condyle and was associated with the eruption of the second permanent molars. Before the eruption of the second permanent molars, CUMOL primarily affects the position of the condyle. After the emergence of the second permanent molars, CUMOL leads to changes in both the condyle's position and the morphology of the glenoid fossa.
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Affiliation(s)
- Ting Li
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China
| | - Sisi Peng
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China
| | - Yuhan Zhao
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China
| | - Jianping Zhou
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Hongwei Dai
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Yan Wu
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
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Yi WJ, Zhang JY, Kong WD, Mai AD, Duan JH. Clinical research on the relationship between the curve of Wilson and temporomandibular joint disorders. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2023; 124:101496. [PMID: 37182758 DOI: 10.1016/j.jormas.2023.101496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 04/18/2023] [Accepted: 05/10/2023] [Indexed: 05/16/2023]
Abstract
OBJECTIVE The aim of this study was to examine the relationship between the curve of Wilson (COW) and temporomandibular joint disorder (TMD). METHODS The study cohort comprised patients aged 19-55 with malocclusion treated at our institution from January to July 2021. They were divided into a malocclusion with TMD group (TMD group) and a malocclusion without TMD group (non-TMB group) based on the diagnostic criteria of TMD. The study outcome was the differences in COW, measured via cone beam computed tomography (CBCT), and statistical analysis was performed using one-way analysis of variance and t-test. RESULTS A total of 250 adult individuals were enrolled, including 162 females (age: 36.43 ± 11.00 years) and 88 males (age: 36.33 ± 9.88 years). Compared with the non-TMB group (n = 125), the TMD group (n = 125) had a significantly greater angle of COW (first molars: P = 0.002; second molars: P < 0.001), higher buccal inclination angle of molars in those with same side temporomandibular joint (TMJ) sounds than those with TMJ sounds (first molar: P = 0.000; second molar: P = 0.006) and greater the side with TMJ sounds (first molar: P < 0.001; second molar: P = 0.016). However, no difference was observed in the buccolingual axial inclination angle of molars between patients with and without TMJ sounds. CONCLUSION The study reported the differences in malocclusion patients with and without TMB, which could be used as a reference by dentists to improve the treatment outcomes of these patients.
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Affiliation(s)
- Wen-Jing Yi
- Shenzhen Stomatology Hospital (Pingshan) of Southern Medical University, Shenzhen, Guangdong 518118, China
| | - Jing-Ya Zhang
- Shenzhen Stomatology Hospital (Pingshan) of Southern Medical University, Shenzhen, Guangdong 518118, China
| | - Wen-da Kong
- Shenzhen Stomatology Hospital (Pingshan) of Southern Medical University, Shenzhen, Guangdong 518118, China
| | - Ai-Die Mai
- Shenzhen Stomatology Hospital (Pingshan) of Southern Medical University, Shenzhen, Guangdong 518118, China
| | - Jiao-Hong Duan
- Shenzhen Stomatology Hospital (Pingshan) of Southern Medical University, Shenzhen, Guangdong 518118, China.
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Rawat P, Saxena D, Srivastava PA, Sharma A, Swarnakar A, Sharma A. Prevalence and severity of temporomandibular joint disorder in partially versus completely edentulous patients: A systematic review. J Indian Prosthodont Soc 2023; 23:218-225. [PMID: 37929360 PMCID: PMC10467323 DOI: 10.4103/jips.jips_136_23] [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: 03/29/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 11/07/2023] Open
Abstract
Temporomandibular joint disorders (TMDs) following tooth loss may or may not be prevalent, but the risk of developing these disorders is always there due to changes in occlusion and vertical dimension, leading to changes in the disc-fossa relationship. The purpose of this systematic review was to evaluate the prevalence and severity of temporomandibular joint (TMJ) disorder in partially versus completely edentulous patients. An elaborated literature search was conducted in PubMed/Medline, Scopus, Web of Science, Lilacs, and Google Scholar databases including all articles about varied effects of partial and complete edentulism on the TMJ published from January 1, 2000, to January 1, 2022. After the meticulous screening, only publications which fulfilled the inclusion parameters were ultimately selected for full-text evaluation and tested for bias using the Joana Briggs Institute Appraisal tools for cross-sectional, case-control, and cohort studies. A total of 547 articles from various electronic databases and manual searches were found. After eliminating the duplicates and thorough screening, 13 studies were included for qualitative synthesis. Most of the studies demonstrated at least one or two signs of the presence of TMDs following tooth loss, the intensity/frequency of which increased in proportion to the number of missing teeth.
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Affiliation(s)
- Pragati Rawat
- Department of Prosthodontics and Crown and Bridge, Subharti Dental College and Hospital, Swami Vivekanand Subharti University, Meerut, India
| | - Deepesh Saxena
- Department of Prosthodontics and Crown and Bridge, Subharti Dental College and Hospital, Swami Vivekanand Subharti University, Meerut, India
| | - Pratiksha A. Srivastava
- Department of Prosthodontics and Crown and Bridge, Seema Dental College and Hospital, Rishikesh, Uttarakhand, India
| | - Abhinav Sharma
- Department of Oral Medicine and Radiology, Subharti Dental College and Hospital, Swami Vivekanand Subharti University, Meerut, India
| | - Arka Swarnakar
- Department of Prosthodontics and Crown and Bridge, Kothiwal Dental College and Research Centre, Moradabad, Uttar Pradesh, India
| | - Aditya Sharma
- Department of Periodontology and Implantology, Seema Dental College and Hospital, Rishikesh, Uttarakhand, India
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Thomas DC, Singer SR, Markman S. Temporomandibular Disorders and Dental Occlusion: What Do We Know so Far? Dent Clin North Am 2023; 67:299-308. [PMID: 36965932 DOI: 10.1016/j.cden.2022.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Throughout the recorded history in the literature of temporomandibular disorders (TMD) there have been a variety of opinions as to its primary cause. Those supporting an occlusal basis of TMD opined that occlusal dysfunction is either the primary cause for or a significant etiopathogenic factor in the causation of TMD. Most of the current literature, however, points to evidence in another direction and questions the causal role of occlusion and occlusal disharmony in TMD etiopathogenesis. Recognition of this evidence-based literature is paramount in eliminating and preventing the chances of overtreatment of patients with TMD.
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Affiliation(s)
- Davis C Thomas
- Department of Diagnostic Sciences, Rutgers School of Dental Medicine, 110 Bergen Street, Newark, NJ 07103, USA; Eastman Institute of Oral Health, Rochester, NY 14642, USA.
| | - Steven R Singer
- Department of Diagnostic Sciences, Rutgers School of Dental Medicine, 110 Bergen Street, Newark, NJ 07103, USA
| | - Stanley Markman
- Department of Diagnostic Sciences, Rutgers School of Dental Medicine, 110 Bergen Street, Newark, NJ 07103, USA
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Liu Y, Yin T, He M, Fang C, Peng S. Association of congenitally missing teeth with adult temporomandibular disorders in the urban health checkup population. BMC Oral Health 2023; 23:188. [PMID: 36997944 PMCID: PMC10064555 DOI: 10.1186/s12903-023-02855-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 03/03/2023] [Indexed: 04/01/2023] Open
Abstract
BACKGROUND Congenitally missing tooth is the most common dental abnormality which leaves spaces in the arch, leads to numerous forms of malocclusion due to the Bolton index discrepancy and is even associated with abnormal craniofacial morphology. Even though the roles of malocclusion and tooth loss in temporomandibular disorders (TMD) development remain controversial, basic researches have found some common molecules are involved in osteoarthritis and dental agenesis. However, the association of congenitally missing teeth with TMD is unknown. We hence investigated the association of congenitally missing teeth with TMD. METHODS A cross-sectional analysis of 586 control participants (male: 287, female: 299, 38.33 ± 11.65 years) and 583 participants with non-third molar congenitally missing teeth (male: 238, female: 345, 39.13 ± 11.67 years) who consecutively received routine dental and TMD checkup according to Diagnostic Criteria for Temporomandibular Disorders Axis I in Health Management Center, Xiangya Hospital was performed. Logistic regression analysis was used to study the association of congenitally missing teeth with TMD. RESULTS The congenitally missing teeth group included 581 hypodontia and 2 oligodontia participants. The congenitally missing anterior teeth participants, the congenitally missing posterior teeth participants and participants with both congenitally missing anterior and posterior teeth accounted for 88.34%, 8.40% and 3.26% of the congenitally missing teeth group respectively. Congenitally missing teeth group had greater ratios of females and orthodontic history. Participants with congenitally missing teeth had a significantly higher prevalence of overall TMD (67.24%) in comparison to control participants (45.90%). After adjusting age, gender, presence of congenitally missing teeth, number of congenitally missing teeth, number of non-congenitally missing teeth, number of dental quadrants with missing teeth, visible third molar and orthodontic history, the variables of age, gender, presence of congenitally missing teeth and number of dental quadrants with missing teeth were significant for overall TMD. Multivariable logistic regression analysis showed congenitally missing tooth was significantly related with overall TMD [odds ratio (OR):1.689(1.080-2.642), P = 0.022], intra-articular TMD [OR: 1.711(1.103-2.656), P = 0.017] and pain-related TMD [OR: 3.093(1.321-7.239), P = 0.009]. CONCLUSION Congenitally missing tooth is a risk factor for TMD. When treating the congenitally missing teeth population, TMJ evaluation and multidisciplinary strategies are necessary.
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Affiliation(s)
- Yundong Liu
- Health Management Center, Xiangya Hospital, Central South University, 87 Xiangya Road, 410008, Changsha, Hunan, P.R. China.
| | - Tao Yin
- Changsha Health Vocational College, 410605, Changsha, Hunan, P.R. China
| | - Mi He
- Department of Stomatology, Xiangya Hospital, Central South University, 410008, Changsha, Hunan, P.R. China
| | - Changyun Fang
- Department of Stomatology, Xiangya Hospital, Central South University, 410008, Changsha, Hunan, P.R. China
| | - Shifang Peng
- Department of Infectious Diseases, Xiangya Hospital, Central South University, 87 Xiangya Road, 410008, Changsha, Hunan, P.R. China.
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Jamali Z, Hadilou N, Nourizadeh A. Effect of the posterior stop on temporomandibular disorders: A systematic review. J Dent Res Dent Clin Dent Prospects 2022; 16:147-152. [PMID: 36704181 PMCID: PMC9871174 DOI: 10.34172/joddd.2022.025] [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: 12/19/2021] [Accepted: 09/09/2022] [Indexed: 01/20/2023] Open
Abstract
Background. Temporomandibular disorders have common signs and symptoms, including pain in the masticatory muscles, limitation or deviation in a mandibular range of motion, and other common patient complaints, such as headache and earache. The main focus of this study was to collect comprehensive and integrated data on the effect of the posterior stop on temporomandibular joint disorders, as well as prevention, treatment, and follow-up care for the patients. Methods. The authors conducted the search in PubMed, SCOPUS, Web of Science, Cochrane Library, CINHAL, Medline, ProQuest, Google Scholar, Magiran, IranDoc, SID, and Iranmedex databases for relevant articles. A list of selected study sources, related conferences, and grey literature were manually searched in addition to the databases mentioned above. A 21-year time limit was imposed (2000-2021). Results. Finally, 16 articles were selected to be reviewed in this systematic review. The designs of the included studies were heterogeneous, and due to the low number of studies covered, the authors could not carry out a meta-analysis. Conclusion. The causes of temporomandibular disorders are multifactorial and complex. Therefore, it is difficult to investigate the relationship between this disorder and predictors. The results of the present study indicate that to determine the effect of the posterior stop on temporomandibular joint disorders, more clinical trials and case-control studies should be conducted.
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Affiliation(s)
- Zahra Jamali
- Department of Oral Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Negin Hadilou
- Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran,Corresponding author: Negin Hadilou,
| | - Amin Nourizadeh
- Department of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
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SALİMOV F, CİFTCİ V, TEMUR K. Çocuklarda erken daimi 1. molar diş çekimiyle ilişkili temporomandibular eklem hastalıkları. CUKUROVA MEDICAL JOURNAL 2020. [DOI: 10.17826/cumj.781974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Stone JH, Nelson GC, Fitzpatrick SM. Temporomandibular joint osteoarthritis at Chelechol ra Orrak, Palau. INTERNATIONAL JOURNAL OF PALEOPATHOLOGY 2020; 28:20-31. [PMID: 31902741 DOI: 10.1016/j.ijpp.2019.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 12/04/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To explore the frequency and severity of temporomandibular joint osteoarthritis (TMJ-OA) and its causative factors in a skeletal assemblage from the prehistoric site of Chelechol ra Orrak, Palau, western Micronesia. MATERIALS 50 temporomandibular joint surfaces (mandibular condyles and articular eminences), representing a minimum of 22 adult individuals, 17 of which retain teeth. METHODS Joint surfaces were macroscopically evaluated for characteristics associated with TMJ-OA and joint morphology. Dental remains were scored for tooth wear and staining. RESULTS Nine individuals (40.1 %) displayed lesions typical of TMJ-OA. The strongest associations were between tooth wear and TMJ-OA. CONCLUSIONS Indirect effects of parafunctional dental activity appear to be a factor in TMJ-OA frequency at Chelechol ra Orrak. While betel nut chewing may be one of those activities, it does not appear to be solely driving the presence of TMJ-OA. SIGNIFICANCE This study highlights the association between a specific parafunctional use of the temporomandibular joint and the potential pathological consequences. It also reinforces the need to carefully evaluate the archaeological context of skeletal remains in order to evaluate specific etiological factors in the presence of TMJ-OA in present and past populations. LIMITATIONS Sample sizes are limited in this study. This will increase as excavations continue. SUGGESTIONS FOR FURTHER RESEARCH Because dental occlusion appears to be associated with TMJ-OA, focus on dental conditions affecting occlusal patterns, such as third molar agenesis, antemortem tooth loss, and malocclusion, and their relationship to TMJ-OA frequency, are recommended.
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Affiliation(s)
- Jessica H Stone
- Department of Anthropology, University of Oregon, Eugene, OR, United States.
| | - Greg C Nelson
- Department of Anthropology, University of Oregon, Eugene, OR, United States; Museum of Natural and Cultural History, University of Oregon, Eugene, OR, United States
| | - Scott M Fitzpatrick
- Department of Anthropology, University of Oregon, Eugene, OR, United States; Museum of Natural and Cultural History, University of Oregon, Eugene, OR, United States
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Manfredini D, Lombardo L, Siciliani G. Temporomandibular disorders and dental occlusion. A systematic review of association studies: end of an era? J Oral Rehabil 2017; 44:908-923. [DOI: 10.1111/joor.12531] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/06/2017] [Indexed: 12/26/2022]
Affiliation(s)
- D. Manfredini
- Post-graduate School in Orthodontics; University of Ferrara; Ferrara Italy
| | - L. Lombardo
- Post-graduate School in Orthodontics; University of Ferrara; Ferrara Italy
| | - G. Siciliani
- Post-graduate School in Orthodontics; University of Ferrara; Ferrara Italy
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Wang M, Sun L, Yu SB, Liu X, Jiao K, Wang GW, Liu L, He JJ. Degenerative Changes in Rat Condylar Cartilage Induced by Non-Matching Occlusion Created by Scattered Orthodontic Teeth-Moving. Cranio 2014; 30:286-92. [PMID: 23156970 DOI: 10.1179/crn.2012.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- Meiqing Wang
- Dept. of Oral Anatomy and Physiology and TMDSchool of Stomatology, Fourth Military Medical University, 145 West Changle Road, Xi’an, China
| | - Lei Sun
- Dept. of Oral Anatomy and Physiology and TMDSchool of Stomatology, Fourth Military Medical University, 145 West Changle Road, Xi’an, China
| | - Shi-Bin Yu
- Dept. of Oral Anatomy and Physiology and TMDSchool of Stomatology, Fourth Military Medical University, 145 West Changle Road, Xi’an, China
| | - Xiaodong Liu
- Dept. of Oral Anatomy and Physiology and TMDSchool of Stomatology, Fourth Military Medical University, 145 West Changle Road, Xi’an, China
| | - Kai Jiao
- Dept. of Oral Anatomy and Physiology and TMDSchool of Stomatology, Fourth Military Medical University, 145 West Changle Road, Xi’an, China
| | - Guo-Wei Wang
- Dept. of Oral Anatomy and Physiology and TMDSchool of Stomatology, Fourth Military Medical University, 145 West Changle Road, Xi’an, China
| | - Lei Liu
- Dept. of Oral Anatomy and Physiology and TMDSchool of Stomatology, Fourth Military Medical University, 145 West Changle Road, Xi’an, China
| | - Jian-Jun He
- Dept. of Oral Anatomy and Physiology and TMDSchool of Stomatology, Fourth Military Medical University, 145 West Changle Road, Xi’an, China
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Shet RGK, Rao S, Patel R, Suvvati P, Sadar LR, Yadav RD. Prevalence of temporomandibular joint dysfunction and its signs among the partially edentulous patients in a village of North Gujarat. J Contemp Dent Pract 2013; 14:1151-5. [PMID: 24858766 DOI: 10.5005/jp-journals-10024-1466] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
UNLABELLED There is disagreement about the association between missing teeth and the presence of temporomandibular disorder (TMD). AIM To investigate whether, the span of edentulousness, gender, number of quadrants involved, pathological migration and the type of kennedy's classification are related to the temporomandibular joint (TMJ) dysfunction signs. MATERIALS AND METHODS Clinical examination of 250 patients (males 99 and females 151) was done among the age group of 35 to 45 years. The patients were partially edentulous for 6 months or more and did not wear any kind of prosthesis. RESULTS Among 250 subjects, females showed more TMJ dysfunction signs. Clicking sounds were present in 46.5%, mandibular deviation was present in 40% of individuals, TMJ tenderness was observed in 32% and masseter was involved in 32% of individual. Temporomandibular joint dysfunction signs in relation to pathologic migration of teeth show that clicking and mandibular deviation was present in 54.5 and 49.2% and among muscles masseter muscle tenderness 41.9% was more commonly present. Masseter muscle tenderness 64.1% was seen in individuals who were edentulous for more than 5 years. CONCLUSION Females subjects had a significantly higher prevalence of TMJ dysfunction signs then male subjects. As the span and time of edentulousness, the number of missing teeth and the number of quadrant involved increased, the signs of dysfunction became more prevalent. Among the TMJ dysfunction signs deviation and clicking sound were most frequently observed. The masseter muscle was most commonly affected and demonstrated muscle tenderness.
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Affiliation(s)
- R G K Shet
- Professor, Department of Dental Program, College of Medical Sciences and Teaching Hospital, Bharatpur-10, Chitwan, Nepal
| | - Srinivasa Rao
- Reader, Department of Prosthodontics, Mamata Dental College and Hospital, Khammam, Andhra Pradesh, India
| | - Ruchi Patel
- Assistant Professor, Department of Prosthodontics, Ahmedabad Dental College and Hospital, Ahmedabad, Gujarat, India, e-mail:
| | - Priyalatha Suvvati
- Senior Lecturer, Department of Prosthodontics, Mamata Dental College and Hospital, Khammam, Andhra Pradesh, India
| | - Leena R Sadar
- Professor and Head, Department of Prosthodontics, Yogita Dental College and Hospital, Khed, Maharashtra, India
| | - Rishi Dev Yadav
- Reader, Department of Conservative Dentistry and Endodontics, New Horizon Dental College, Bilaspur, Chhattisgarh, India
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Kanavakis G, Mehta N. The role of occlusal curvatures and maxillary arch dimensions in patients with signs and symptoms of temporomandibular disorders. Angle Orthod 2013; 84:96-101. [PMID: 23509999 DOI: 10.2319/111312-870.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To identify differences in occlusal curvatures and maxillary arch dimensions between subjects with signs and symptoms of temporomandibular disorders TMDs and asymptomatic subjects. MATERIALS AND METHODS One hundred subjects 78 female and 22 male who consented to participate in this research were examined for signs and symptoms of TMDs according to the guidelines of the Research Diagnostic Criteria for Temporomandibular Disorders RDCTMD. In addition, occlusal measurements were performed for all subjects on plaster models. All statistical analyses were performed with SPSS version 19. RESULTS Significant associations were revealed between the depth of the curve of Spee COS and temporomandibular joint TMJ sounds. Furthermore, maxillary arch width was negatively correlated to the steepness of the curve of Wilson. No differences were found between subjects with and without a history of orthodontic treatment. CONCLUSIONS Subjects with TMJ sounds tend to have a flatter COS compared to subjects without TMJ sounds.
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Affiliation(s)
- Georgios Kanavakis
- a Assistant Professor, Department of Orthodontics, Tufts University School of Dental Medicine, Boston, Mass
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Costa MD, Froes Junior GDRT, Santos CN. Evaluation of occlusal factors in patients with temporomandibular joint disorder. Dental Press J Orthod 2012. [DOI: 10.1590/s2176-94512012000600015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE: The aim of this study was to determine the prevalence and the relation between the main occlusal factors and the temporomandibular disorder (TMD). METHODS: We analyzed 100 patients (50 diagnosed with TMD and 50 asymptomatic volunteers, control group) through a questionnaire that classified TMD as absent, mild, moderate and severe. Then, an evaluation was made of intraoral occlusal factors: Absence of posterior teeth, wear facets, overjet, overbite, open bite, posterior crossbite, sagittal relationship (Class I, II and III), centric relation discrepancy for maximum intercuspation, anterior guidance and balancing occlusal interference. The c² examined the association between TMD and considered occlusal variables. RESULTS: The prevalence of studied occlusal factors was higher in patients with moderate and severe TMD. Statistically significant results were found on: Absence of five or more posterior teeth, overbite and overjet greater than 5 mm, edge-to-edge bite, posterior crossbite, Class II and III, the absence of effective anterior guide and balancing side interferences. CONCLUSIONS: Indeed, it is concluded that there is a relationship between TMD and occlusal factors, however it can not be told to what extent these factors are predisposing, precipitating or perpetuating the disease. Therefore, despite its multifactorial etiology, one can not neglect the occlusal analysis of these patients.
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Wang MQ, He JJ, Chen CS, Widmalm SE. A preliminary anatomical study on the association of condylar and occlusal asymmetry. Cranio 2011; 29:111-6. [PMID: 21661585 DOI: 10.1179/crn.2011.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The aim of this study was to test the hypothesis that condylar and occlusion asymmetry are not associated. For each of 22 skulls, the asymmetry of condyles was graded by one examiner and the asymmetry of occlusion by another examiner, both blinded to each other's evaluation, as 0 = symmetrical, 1 = mild asymmetrical and 2 = severe asymmetrical. There were 18 condyles graded the same as to their occlusion, but in four, the grades differed by one degree. Nine were graded symmetrical, seven were mild, and six were graded severely asymmetrical condyles. The corresponding figures for occlusion were: 10 were graded symmetrical, seven were graded mildly asymmetrical, and five were graded severely asymmetrical occlusion. The relation between occlusion and condylar asymmetry was tested using Goodman-Kruskal's gamma and was found to be 0.970 (p < 0.001). The null hypothesis was not supported. The results indicate that asymmetry of occlusion and condyles are associated, which indicates the need for further studies on larger samples, and in vivo studies.
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Affiliation(s)
- Mei-Qing Wang
- Dept. of Oral Anatomy, Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 West Changle Road Xi'an, China.
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Jiao K, Wang MQ, Niu LN, Dai J, Yu SB, Liu XD. Mandibular condylar cartilage response to moving 2 molars in rats. Am J Orthod Dentofacial Orthop 2010; 137:460.e1-8; discussion 460-1. [PMID: 20362904 DOI: 10.1016/j.ajodo.2009.09.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2009] [Revised: 09/01/2009] [Accepted: 09/01/2009] [Indexed: 11/15/2022]
Abstract
INTRODUCTION The purpose of this study was to investigate the responses of mandibular condylar cartilage to moving 2 molars in different combinations. METHODS Rats were assigned to male and female control and experimental groups (each, n = 5). Elastic rubber bands were used to move medially the maxillary left and the mandibular right first molars in experimental group I. The same method was used to distally move the maxillary left and the mandibular right third molars, 2 mandibular third molars, and 2 maxillary third molars in experimental groups II, III, and IV, respectively. At the end of the eighth week, all condyles were examined histologically. The areas of histologic change as a percentage of total cartilage area were compared by using the Mann-Whitney U test. RESULTS Cartilage degenerative remodeling was observed in experimental groups II, III, and IV. The percentage areas of degenerative remodeling were higher in female experimental groups II and III than in the female control group, and in female experimental group II than in female experimental group IV and male experimental group II (all, P <0.05). CONCLUSIONS The mandibular condylar cartilage of female rats responded variously to different combinations of molar movement; the most obvious remodeling was observed in groups in which the maxillary left and mandibular right third molars were moved.
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Affiliation(s)
- Kai Jiao
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
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Penna PP, Recupero M, Gil C. Influence of psychopathologies on craniomandibular disorders. Braz Dent J 2009; 20:226-30. [PMID: 19784469 DOI: 10.1590/s0103-64402009000300010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Psychopathologies play a role in the etiology and maintenance of craniomandibular disorders (CMD). In this study, the craniomandibular index was applied to valuate signs and symptoms of CMD in 60 dentate patients, who were assigned to 2 groups: symptomatic (n=35) and asymptomatic (n=25). An interview on psychopathologies was carried out with the aim to detect the presence of some mood disorders, such as depression, dysthymic and bipolar I disorders. Among these disturbances, depression was the most significant aspect to be reported (p<0.05) since it was present in most symptomatic patients. This important interaction was also significantly correlated (p<0.05) with the Palpation Index. These results suggest that psychopathological aspects could increase muscle tenderness and pain in addition to sleep dysfuntions and other physical complaints. Therefore, psychopathologies should be regarded as an important aspect in patients with orofacial pains.
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Wang MQ, Xue F, He JJ, Chen JH, Chen CS, Raustia A. Missing posterior teeth and risk of temporomandibular disorders. J Dent Res 2009; 88:942-5. [PMID: 19783804 DOI: 10.1177/0022034509344387] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
There is disagreement about the association between missing posterior teeth and the presence of temporomandibular disorders (TMD). Here, the purpose was to investigate whether the number of missing posterior teeth, their distribution, age, and gender are associated with TMD. Seven hundred and forty-one individuals, aged 21-60 years, with missing posterior teeth, 386 with and 355 without TMD, were included. Four variables-gender, age, the number of missing posterior teeth, and the number of dental quadrants with missing posterior teeth-were analyzed with a logistic regression model. All four variables-gender (OR = 1.59, men = 1, women = 2), age (OR = 0.98), the number of missing posterior teeth (OR = 0.51), and the number of dental quadrants with missing posterior teeth (OR = 7.71)-were entered into the logistic model (P < 0.01). The results indicate that individuals who lose posterior teeth, with fewer missing posterior teeth but in more quadrants, have a higher prevalence of TMD, especially young women.
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Affiliation(s)
- M Q Wang
- Department of Oral Anatomy and Physiology, Xi'an, PR China 710032.
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Death and proliferation of chondrocytes in the degraded mandibular condylar cartilage of rats induced by experimentally created disordered occlusion. Apoptosis 2008; 14:22-30. [DOI: 10.1007/s10495-008-0279-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Beitollahi J, Mansourian A, Bozorgi Y, Farrokhnia T, Manavi A. Evaluating the Most Common Etiologic Factors in Patients with Temporomandibular
Disorders: A Case Control Study. ACTA ACUST UNITED AC 2008. [DOI: 10.3923/jas.2008.4702.4705] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Wang MQ, He JJ, Li G, Widmalm SE. The effect of physiological nonbalanced occlusion on the thickness of the temporomandibular joint disc: A pilot autopsy study. J Prosthet Dent 2008; 99:148-52. [DOI: 10.1016/s0022-3913(08)60031-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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