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Peng S, Yin T, He M, Liu Y. Association of unreplaced missing posterior teeth with migraine or severe headaches in US adults: A cross-sectional population study. J Prosthet Dent 2024:S0022-3913(24)00572-9. [PMID: 39256105 DOI: 10.1016/j.prosdent.2024.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 08/10/2024] [Accepted: 08/15/2024] [Indexed: 09/12/2024]
Abstract
STATEMENT OF PROBLEM The association between unreplaced missing posterior teeth and migraine has not been sufficiently reported. PURPOSE The purpose of this cross-sectional study was to investigate the relationships between unreplaced missing posterior teeth and migraine or severe headaches. MATERIAL AND METHODS Data from the US National Health and Nutrition Examination Survey 1999-2004 on 12 662 participants aged between 20 and 85 years were analyzed. The survey produced complete data on dentition examination, dietary intakes, and self-reported migraine or severe headaches. Weighted multivariable logistic regression analyses were performed (α=.05). RESULTS A total of 20.28% of the participants had migraine or severe headaches. After adjusting demographic, clinical, and dietary covariates, the total number of missing teeth was not significantly associated with migraine or severe headaches, and only having both anterior and posterior missing teeth was significantly associated with migraine or severe headaches. The odds ratio (OR) and confidence interval (CI) was 1.32(1.09, 1.60) (P=.007). A significantly positive correlation was found between the number of unreplaced missing teeth and migraine or severe headaches. An increase of 1 in the number of unreplaced missing teeth was associated with a 3% increase in migraine or severe headaches (OR and CI: 1.03(1.01, 1.06), P=.012). However, no significant relationship was found between replaced missing teeth and migraine or severe headaches (OR and CI: 1.00(0.99, 1.01), P=.800). Furthermore, unreplaced missing posterior teeth and both unreplaced anterior and posterior teeth were significantly related with more migraine or severe headaches, but no significant association of unreplaced teeth was found with migraine or severe headaches only in the anterior zone in the adjusted model (OR and CI: anterior teeth unreplaced: 0.90(0.43, 1.88), P=.800; posterior teeth unreplaced: 1.14(1.00, 1.30), P=.047; both anterior and posterior teeth unreplaced: 1.61(1.16, 2.22), P=.007). Because of the important association between posterior missing teeth and migraine or severe headaches, further analyses found a 1 tooth increase in unreplaced posterior teeth was related to a 4% increment in migraine or severe headaches (OR and CI: 1.04(1.01, 1.07), P=.017); however, the number of replaced posterior teeth was not associated with migraine or severe headaches (OR and CI: 1.00(0.99, 1.02), P=.900). CONCLUSIONS The number of unreplaced missing posterior teeth was positively associated with migraine or severe headaches, while missing but restored posterior teeth were not associated with migraine or severe headaches in a US population.
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Affiliation(s)
- Shifang Peng
- Professor, Department of Infectious Diseases, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Tao Yin
- Resident, Changsha Health Vocational College, Changsha, Hunan, PR China
| | - Mi He
- Postgraduate student, Department of Stomatology, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Yundong Liu
- Researcher and Attending, Health Management Center, Xiangya Hospital, Central South University, Changsha, Hunan, PR China.
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Altun BD, Bayramov N, Yalcinkaya SE. Radiological Associations between Posterior Edentulism and Condylar Bony Changes: A Retrospective Study. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2024; 125:101650. [PMID: 37777182 DOI: 10.1016/j.jormas.2023.101650] [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: 06/18/2023] [Revised: 09/21/2023] [Accepted: 09/27/2023] [Indexed: 10/02/2023]
Abstract
This retrospective study aimed to investigate the relationship between posterior edentulism and condylar bone changes in patients aged 35-60 years. The CBCT images of 259 patients, including 131 posterior edentulous and 128 posterior dentulous patients, were analyzed to identify the types of condylar bone changes. The frequency of flattening, sclerosis, erosion, and reduced joint space was found to be higher in posterior edentulous patients. Regression analysis revealed that combined premolar and molar loss and being female were significant predictors of condylar erosion (p = 0.006; OR: 3.264; 95% CI: 1.401 - 7.603, p=0.031; OR: 2.652; %95 CI: 1.095 - 6.424). The study provides support for the domino effect phenomenon in temporomandibular joint pathology, indicating that posterior edentulism can have a significant impact on the occurrence of erosive condylar changes. The findings suggest that prosthetic and temporomandibular joint treatment approaches should consider the association between posterior edentulism and condylar bone changes, particularly in female patients with combined premolar and molar loss. Therefore, close attention should be paid to the management of these patients to minimize the risk of temporomandibular joint pathology.
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Affiliation(s)
- Busra Dilara Altun
- Marmara University, Faculty of Dentistry, Department of Oral and Maxillofacial Radiology, Istanbul, Turkey.
| | - Nuran Bayramov
- Istanbul Aydin University, Faculty of Dentistry, Department of Oral and Maxillofacial Radiology, Istanbul, Turkey
| | - Sebnem Ercalik Yalcinkaya
- Marmara University, Faculty of Dentistry, Department of Oral and Maxillofacial Radiology, Istanbul, Turkey
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Chan H, Alimujiang A, Fong SI, Wu ML, Liang R, Lai PY, Wei HW, Shen S. Use of T-Scan III in analyzing occlusal changes in molar fixed denture placement. BMC Oral Health 2024; 24:264. [PMID: 38388920 PMCID: PMC10885451 DOI: 10.1186/s12903-024-04014-1] [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: 07/25/2023] [Accepted: 02/12/2024] [Indexed: 02/24/2024] Open
Abstract
BACKGROUND This study aims to analyze the longitudinal variation of occlusal force distribution prior to and after fixed restoration for molar full-crowns with T-SCAN III which provide reference for occlusal adjustment and long-term maintenance. METHODS We enrolled a total of 20 patients who received conventional restorative treatment for molars. The occlusion examination was conducted in 3 stages (before placement, immediately after placement, and 3 months after placement) using T-SCAN III (Tekscan South Boston, MA, USA, 10.0) to examine and measure the occlusal contact areas of the full dentition. RESULTS The results indicated that the occlusal force distribution in the molar region of the patients changed before and after the fixed restoration, but the percentages of occlusal force in the dental arch of the molar did not differ significantly before and after the restoration (P > 0.05). Three months after the fixed restoration, the percentage of occlusal force in the restored dental arches of lateral teeth increased significantly (P < 0.05). CONCLUSION The results of this study indicated that the occlusal forces of the patients changed with tooth movement and adaptation, which is mainly reflected in the increasing occlusal force. Quantitative occlusal force analysis using T-SCAN III occlusal analyzer can provide more objective and accurate data to effectively guide clinical occlusion adjustments.
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Affiliation(s)
- Hei Chan
- School of Stomatology, Jinan University, Guangzhou City, 510632, Guangdong Province, China
| | - Adili Alimujiang
- School of Stomatology, Jinan University, Guangzhou City, 510632, Guangdong Province, China
| | - Sin Iok Fong
- School of Stomatology, Jinan University, Guangzhou City, 510632, Guangdong Province, China
| | - Ming-Le Wu
- Department of Stomatology, Affiliated Stomatological Hospital of Jinan University (Daliang Hospital Foshan City), Shunde District, Foshan City, 528399, Guangdong Province, China
| | - Ran Liang
- School of Stomatology, Jinan University, Guangzhou City, 510632, Guangdong Province, China
| | - Peng-Yu Lai
- School of Stomatology, Jinan University, Guangzhou City, 510632, Guangdong Province, China
| | - Hui-Wen Wei
- School of Stomatology, Jinan University, Guangzhou City, 510632, Guangdong Province, China
| | - Shan Shen
- Department of Stomatology, The First Affiliated Hospital of Jinan University, No. 613, Huangpu Avenue West, Tianhe District, Guangzhou, 510632, China.
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Rytivaara R, Näpänkangas R, Kainulainen T, Sipola A, Kallio-Pulkkinen S, Raustia A, Thevenot J. Thermographic findings related to facial pain - a survey of 40 subjects. Cranio 2024; 42:69-76. [PMID: 33689590 DOI: 10.1080/08869634.2021.1894859] [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] [Indexed: 10/22/2022]
Abstract
OBJECTIVE The purpose of this study was to assess how thermography findings relate painful symptoms and signs of temporomandibular disorders (TMD). METHODS Thermography, combined with chewing of paraffin wax, was performed on 40 subjects. The results were analyzed according to gender and pain-related TMD symptoms and clinical signs. RESULTS The overall temperatures after chewing were higher in TMD patients than in controls. For females, the most significant findings were the thermal increase between the relaxed state and subjects' state after chewing in temporal and temporomandibular joint (TMJ) regions. For males, all calculated parameters demonstrated a poor ability to discriminate TMD from controls. CONCLUSION Thermography could be a potential tool in diagnostics of female TMD patients. The results suggest that the thermal information assessed in specific facial areas could help to discriminate TMD patients from non-TMD patients and could be used to quantify the pain associated with TMD.
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Affiliation(s)
- Riina Rytivaara
- Department of Dental Imaging, Oulu University Hospital, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Ritva Näpänkangas
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Tiina Kainulainen
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Annina Sipola
- Department of Dental Imaging, Oulu University Hospital, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Soili Kallio-Pulkkinen
- Department of Dental Imaging, Oulu University Hospital, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Aune Raustia
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Jérôme Thevenot
- Medical Imaging, Physics and Technology Research Unit, University of Oulu, Oulu, Finland
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Kluenter T, Stoilov M. Implant-Retained Prosthetic Rehabilitation of a Patient with Severe Oral Lichen Sclerosus. Case Rep Dent 2023; 2023:6681076. [PMID: 38162824 PMCID: PMC10757662 DOI: 10.1155/2023/6681076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 09/19/2023] [Accepted: 12/12/2023] [Indexed: 01/03/2024] Open
Abstract
Background Lichen sclerosus is a rare condition that occurs in the genital area or on the extraoral skin but can also manifest orally (oral lichen sclerosus (OLS)). The condition is associated with atrophy, scarring, and functional limitations of the tissues. In the present case, an extremely pronounced variant is described, and the oral rehabilitation of the patient is presented. Case Report. The edentulous patient showed a progressive course with severely restricted mouth opening and persistent pain. Conventional dental treatment was therefore impossible. To address this issue, two implants were placed in each jaw at the position of the lateral incisors. After osseointegration and exposure of the implants, provisional bridges made of polymethyl-methacrylate were fitted to test the new jaw relation. After a successful provisional phase, an FDP in the sense of an extreme short dental arch (ESDA) has been inserted. Conclusion The experimental treatment of the patient with only a total of four implants and the ESDA concept represented a satisfactory therapy for the patient. The patient regained her chewing ability, which significantly increased her oral health-related quality of life (OHRQoL). Still, it should be noted that this is a high-risk and experimental prosthetic treatment.
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Affiliation(s)
- Tim Kluenter
- Department of Oral, Maxillofacial and Plastic Surgery, Medical Faculty, University of Bonn, Bonn, Germany
| | - Milan Stoilov
- Department of Prosthodontics, Preclinical Education and Dental Materials Science, Medical Faculty, University of Bonn, Bonn, Germany
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Wang M, Wang J, Jin X, Liu D, Bian H, Zhao Y, Li Y. Impact of occlusal contact pattern on dental stability and oromandibular system after orthodontic tooth movement in rats. Sci Rep 2023; 13:22276. [PMID: 38097596 PMCID: PMC10721791 DOI: 10.1038/s41598-023-46668-x] [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: 05/09/2023] [Accepted: 11/03/2023] [Indexed: 12/17/2023] Open
Abstract
How to ensure dental stability in new positions and reduce the likelihood of relapse is a major clinical concern in the orthodontic field. Occlusal contacts between arches may affect the transmission of masticatory forces, thereby influencing the biological response of the periodontal and the oromandibular system. Occlusion factors that may influence the stability after orthodontic tooth movement (OTM) remain largely unknown. Hence, this research was conducted in order to investigate the influence of different occlusal contact patterns on tooth stability and oromandibular system including the masseter muscle and the temporomandibular joint following OTM. By modifying the occlusal surfaces, in vivo animal study models with distinct occlusal patterns corresponding to clinical circumstances were established. The relapse distance of teeth and the level of inflammatory factors in the gingival cervical fluid were analyzed. We also closely observed the histological remodeling of periodontal tissue, masseter tissue, and joint tissue after one week of relapse. Moreover, genes expression in the alveolar bone was analyzed to illustrate the potential biological mechanisms of relapse under the influence of different occlusal contact patterns following OTM. Different occlusal contact patterns after OTM in rats were established. The intercuspation contact between cusp and fossa group exhibited the lowest level of relapse movement, inflammatory factors and osteoclast activity (P < 0.05). On the other hand, groups with interferences or inadequate contacts exhibited more relapse movement, and tend to promote inflammation of periodontal tissue and activate bone resorption (P < 0.05). Adequate occlusal contacts without interference may enhance tooth stability and reduce the likelihood of relapse. After active orthodontic treatment, necessary occlusal adjustment should be made to achieve the desired intercuspation contact relationship and ensure adequate contact between the arches. The elimination of occlusal interferences is crucial to achieving optimal stability and promoting overall healthy condition of the oromandibular system.
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Affiliation(s)
- Menglin Wang
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China
- Department of Stomatology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100043, China
| | - Jing Wang
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Xiang Jin
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Dedi Liu
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Huan Bian
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China.
| | - Yantao Zhao
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China.
- Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China.
- Beijing Engineering Research Center of Orthopedics Implants, Beijing, 100048, China.
- State Key Laboratory of Military Stomatology, Xi'an, 710032, China.
| | - Yanfeng Li
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China.
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Zheng H, Shi L, Lu H, Liu Z, Yu M, Wang Y, Wang H. Influence of edentulism on the structure and function of temporomandibular joint. Heliyon 2023; 9:e20307. [PMID: 37829806 PMCID: PMC10565695 DOI: 10.1016/j.heliyon.2023.e20307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 09/11/2023] [Accepted: 09/18/2023] [Indexed: 10/14/2023] Open
Abstract
Background With the acceleration of the aging process of the population, the number of edentulous patients continuously increased. Edentulism induces the loss of occlusal relationship and cause adverse effects on the stomatognathic system. Temporomandibular joint (TMJ), as a significant component of this system, may also be affected by edentulism in the process of supporting mandibular movement. Purpose Provide a comprehensive review of the structure and function of TMJ in the edentulous population, as well as the prevalence of temporomandibular joint disorder (TMD) in edentulous group. Study selection An electronic search was conducted on articles prior to December 2022 to filter all papers relevant to the structure and function of TMJ in edentulous population. The internet databases (PubMed, Cochrane Library, Embase) were searched using various combinations of keywords for "edentulism" or "edentulous" and "TMJ" or "TMD". Results Firstly, 522 articles were selected from the internet database, and finally, a total of 44 articles met the inclusion and exclusion criteria. The research content of these articles mainly focuses on the structure and function of TMJ in edentulous patients, as well as the clinical signs and symptoms of TMD. Conclusions Edentulous arch induces the loss of occlusal relationship, which may lead to degenerative changes of TMJ components consisting of changes in morphology and bone mass density of condyle, articular fossa, and articular eminence. In addition, the condyle could be shifted backward and upward, and displacement of the articular disc may occur after dentition loss. And the condyle and the articular disc may be guided back to the normal position after effective prosthodontic treatment. But the conclusions of the study on the function of TMJ and the prevalence of TMD in edentulous people are inconsistent. The condition of TMJ, especially the position of condyle-fossa and the symptoms and signs of TMD should not be ignored. If necessary, radiographic examinations should be performed.
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Affiliation(s)
- Huiyun Zheng
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Lei Shi
- Department of Prosthodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Hongye Lu
- Department of Prosthodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Zhichao Liu
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Mengfei Yu
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Yu Wang
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Huiming Wang
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
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Zhang Q, Yuan S, Deng K, Li X, Liang Y, Wu A, Pathak JL, Liu H. Correlation of patients' demographics and clinical symptoms with temporomandibular disorders. Cranio 2023; 41:432-439. [PMID: 33350359 DOI: 10.1080/08869634.2020.1866923] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To investigate the correlation between basic characteristics and clinical features of patients with temporomandibular disorders (TMD). METHODS The R language statistical tool was used to analyze the clinical information of 500 TMD patients, i.e., age, sex, joint noises, mouth opening pattern, and pain symptoms, as well as the results of the mandibular push-back test. A pairwise correlation analysis of each clinical feature was carried out. RESULTS The highest incidence of TMD was observed in the age group of 20 to 30 years (240/500). Around 2/3 of the patients showed pain symptoms. Abnormal mouth opening patterns, joint noises, and temporomandibular joint synovitis (TMJS) were observed in 48.4, 65.4, and 34% of patients, respectively. CONCLUSION Joint click and the corrected deviation of the mouth opening pattern are signs of early-stage TMD, whereas limited mouth opening and TMJS are indicators of progressive stage and complicated TMD.
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Affiliation(s)
- QingBin Zhang
- Institute of Stomatology & Oral Maxilla Facial Key Laboratory, Chinese PLA General Hospital, Beijing, China
- Department of Temporomandibular Joint Surgery, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
| | - ShanShan Yuan
- Department of Temporomandibular Joint Surgery, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
| | - KaiTong Deng
- Department of Temporomandibular Joint Surgery, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
| | - XingYang Li
- State Key Laboratory of Oncology in South China, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Ye Liang
- Department of Stomatology, Xiangya Hospital of Central South University, Changsha, China
| | - AnTong Wu
- Department of Temporomandibular Joint Surgery, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
| | - Janak L Pathak
- Department of Temporomandibular Joint Surgery, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, China
| | - HongChen Liu
- Institute of Stomatology & Oral Maxilla Facial Key Laboratory, Chinese PLA General Hospital, Beijing, China
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Liu Y, Yin T, He M, Fang C, Peng S. The association of severely worn dentition resulting from betel nut chewing with temporomandibular disorders: a cross-sectional study. BMC Oral Health 2023; 23:459. [PMID: 37420243 PMCID: PMC10327273 DOI: 10.1186/s12903-023-03160-2] [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: 04/17/2023] [Accepted: 06/21/2023] [Indexed: 07/09/2023] Open
Abstract
BACKGROUND Most studies support parafunctions play an important role in temporomandibular disorders (TMD), whereas the association between tooth wear and TMD remains controversial. Betel nut chewing as a parafunction is popular in South and Southeast Asia. We therefore investigated the association of severely worn dentition resulting from betel nut chewing with TMD. METHODS A cross-sectional analysis of 408 control participants (male: 380, female: 28, 43.62 ± 9.54 years) and 408 participants with betel nut chewing related severely worn dentition (male: 380, female: 28, 43.73 ± 8.93 years) who received dental and TMD checkup according to Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) in Health Management Center, Xiangya Hospital was performed. Betel nut chewing related severely worn dentition meant all the natural teeth had moderate to severe tooth wear [Tooth Wear Index (TWI) ≥ 2)] including ≥ 2 severe wear teeth (TWI ≥ 3) due to betel nut chewing. Multivariable logistic regression analysis was used. RESULTS After adjusting for age, gender, betel nut chewing related severely worn dentition, oral submucosal fibrosis, number of missing teeth, number of dental quadrants with missing teeth, visible third molar and orthodontic history, variables of age, gender and betel nut chewing related severely worn dentition were significant for overall TMD. Multivariable analysis showed betel nut chewing related severely worn dentition was significantly associated with intra-articular TMD [odds ratio and 95% confidence intervals: 1.689 (1.271-2.244), P = 0.001] in a betel nut chewing dose-dependent manner. CONCLUSION Betel nut chewing related severely worn dentition was associated with intra-articular TMD.
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Affiliation(s)
- Yundong Liu
- Health Management Center, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, China.
| | - Tao Yin
- Changsha Health Vocational College, Changsha, Hunan, 410605, China
| | - Mi He
- Department of Stomatology, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
| | - Changyun Fang
- Department of Stomatology, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
| | - Shifang Peng
- Department of Infectious Diseases, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, 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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Leal MDCF, Castro MML, Sosthenes MCK. Updating The General Practitioner on The Association Between Teeth Loss and Temporomandibular Disorders: A Systematic Review. Eur J Dent 2023; 17:296-309. [PMID: 36574784 PMCID: PMC10424267 DOI: 10.1055/s-0042-1757209] [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] [Indexed: 12/29/2022] Open
Abstract
The belief about a possible association between the absence of one or more teeth and the presence of temporomandibular disorders (TMD), although old, is still present among the dental class. Although evidence points to a lack of association between loss of posterior support and the presence of TMD, we do not have critical studies on the extent, quantity, or location of these losses. In this sense, this systematic review aims to investigate the association between tooth loss and the presence of TMD signs or diagnostic subgroups. Search strategies using a combination of keywords tooth loss and TMDs were performed in six databases (PubMed, Embase, Web of Science, Livivo, Lilacs, and Scopus) and gray literature from August to September 2020. Observational studies that investigated the association between tooth loss in TMD were considered. The risk of bias was assessed using the Joanna Briggs Institute (JBI) Critical Assessment Checklist for cross-sectional analytical studies, case-control, and cohort studies. Finally, the level of certainty measured by the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) was assessed. Six articles were included in the review according to the eligibility criteria. Of these, five had a high risk of bias and one had a moderate risk. Only one study showed an association between the loss of posterior teeth and the presence of joint sounds and joint pain, the others found no significant association with sign or TMD subgroups diagnostic.There is no scientific evidence to support the association between one or more tooth loss and the presence of TMD signs and symptoms or diagnostic subgroups.
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Affiliation(s)
- Marília da Cunha Feio Leal
- Laboratório de Investigações em Neurodegeneração e Infecção, Instituto de
Ciências Biológicas, Hospital Universitário João de Barros Barreto, Universidade Federal
do Pará, Belém, Brazil
| | - Micaele Maria Lopes Castro
- Laboratório de Investigações em Neurodegeneração e Infecção, Instituto de
Ciências Biológicas, Hospital Universitário João de Barros Barreto, Universidade Federal
do Pará, Belém, Brazil
| | - Márcia Consentino Kronka Sosthenes
- Laboratório de Investigações em Neurodegeneração e Infecção, Instituto de
Ciências Biológicas, Hospital Universitário João de Barros Barreto, Universidade Federal
do Pará, Belém, Brazil
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12
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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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13
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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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14
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Fathi A, Atash R, Fardi E, Ahmadabadi M, Hashemi S. Comparison of the outcomes and complications of three-unit porcelain-fused-to-metal tooth-implant-supported prostheses with implant-supported prostheses: A systematic review and meta-analysis. Dent Res J (Isfahan) 2023. [DOI: 10.4103/1735-3327.367902] [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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15
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Ji YY, Liu X, Li X, Xiao YF, Ma T, Wang J, Feng Y, Shi J, Wang MQ, Li JL, Lai JH. Activation of the Vpdm VGLUT1-VPM pathway contributes to anxiety-like behaviors induced by malocclusion. Front Cell Neurosci 2022; 16:995345. [PMID: 36605612 PMCID: PMC9807610 DOI: 10.3389/fncel.2022.995345] [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: 07/15/2022] [Accepted: 11/29/2022] [Indexed: 12/24/2022] Open
Abstract
Occlusal disharmony has a negative impact on emotion. The mesencephalic trigeminal nucleus (Vme) neurons are the primary afferent nuclei that convey proprioceptive information from proprioceptors and low-threshold mechanoreceptors in the periodontal ligament and jaw muscles in the cranio-oro-facial regions. The dorsomedial part of the principal sensory trigeminal nucleus (Vpdm) and the ventral posteromedial nucleus (VPM) of thalamus have been proven to be crucial relay stations in ascending pathway of proprioception. The VPM sends numerous projections to primary somatosensory areas (SI), which modulate emotion processing. The present study aimed to demonstrate the ascending trigeminal-thalamic-cortex pathway which would mediate malocclusion-induced negative emotion. Unilateral anterior crossbite (UAC) model created by disturbing the dental occlusion was applied. Tract-tracing techniques were used to identify the existence of Vme-Vpdm-VPM pathway and Vpdm-VPM-SI pathway. Chemogenetic and optogenetic methods were taken to modulate the activation of VpdmVGLUT1 neurons and the Vpdm-VPM pathway. Morphological evidence indicated the involvement of the Vme-Vpdm-VPM pathway, Vpdm-VPM-SI pathway and VpdmVGLUT1-VPM pathway in orofacial proprioception in wild-type mice and vesicular glutamate transporter 1 (VGLUT1): tdTomato mice, respectively. Furthermore, chemogenetic inhibition of VpdmVGLUT1 neurons and the Vpdm-VPM pathway alleviated anxiety-like behaviors in a unilateral anterior crossbite (UAC) model, whereas chemogenetic activation induced anxiety-like behaviors in controls and did not aggravate these behaviors in UAC mice. Finally, optogenetic inhibition of the VpdmVGLUT1-VPM pathway in VGLUT1-IRES-Cre mice reversed UAC-induced anxiety comorbidity. In conclusion, these results suggest that the VpdmVGLUT1-VPM neural pathway participates in the modulation of malocclusion-induced anxiety comorbidity. These findings provide new insights into the links between occlusion and emotion and deepen our understanding of the impact of occlusal disharmony on brain dysfunction.
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Affiliation(s)
- Yuan-Yuan Ji
- College of Forensic Science, Xi’an Jiaotong University, Xi’an, China,Department of Anatomy, School of Medicine, Northwest University, Xi’an, China,Department of Anatomy, K. K. Leung Brain Research Centre, Fourth Military Medical University, Xi’an, China
| | - Xin Liu
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, Fourth Military Medical University, Xi’an, China,Department of Stomatology, The 960th Hospital of People’s Liberation Army, Jinan, China
| | - Xin Li
- Department of Stomatology, The 960th Hospital of People’s Liberation Army, Jinan, China
| | - Yi-Fan Xiao
- Department of Anatomy, School of Medicine, Northwest University, Xi’an, China
| | - Teng Ma
- Functional and Molecular Imaging Key Lab of Shaanxi Province, Department of Radiology, Tangdu Hospital, Fourth Military Medical University, Xi’an, China
| | - Jian Wang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, China
| | - Yue Feng
- College of Forensic Science, Xi’an Jiaotong University, Xi’an, China
| | - Juan Shi
- Department of Anatomy, K. K. Leung Brain Research Centre, Fourth Military Medical University, Xi’an, China
| | - Mei-Qing Wang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, Fourth Military Medical University, Xi’an, China,*Correspondence: Mei-Qing Wang,
| | - Jin-Lian Li
- Department of Anatomy, School of Medicine, Northwest University, Xi’an, China,Department of Anatomy, K. K. Leung Brain Research Centre, Fourth Military Medical University, Xi’an, China,Jin-Lian Li,
| | - Jiang-Hua Lai
- College of Forensic Science, Xi’an Jiaotong University, Xi’an, China,Jiang-Hua Lai,
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16
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Tervahauta E, Närhi L, Pirttiniemi P, Sipilä K, Näpänkangas R, Tolvanen M, Vuollo V, Silvola AS. Prevalence of sagittal molar and canine relationships, asymmetries and midline shift in relation to temporomandibular disorders (TMD) in a Finnish adult population. Acta Odontol Scand 2022; 80:470-480. [PMID: 35148484 DOI: 10.1080/00016357.2022.2036364] [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: 11/01/2022]
Abstract
OBJECTIVE To examine the prevalence of sagittal relationships, asymmetries and midline shift, and their associations with temporomandibular disorders (TMD) in the Northern Finland Birth Cohort 1966 (NFBC1966). MATERIALS AND METHODS 1845 subjects participated in a clinical examination at the age of 46. Occlusal measurements were performed using 3D models. Symptoms of TMD were screened using validated questions, and signs and diagnoses of TMD were assessed using a modified protocol of the Diagnostic Criteria for TMD (DC/TMD) and questionnaires. Associations between variables of occlusion and TMD were evaluated with χ2-test and Fisher's exact test and using logistic regression analyses, adjusted for self-reported general health, mental health, bruxism, and rheumatoid arthritis. RESULTS The most common sagittal relationships were Class I and normal canine relationship. Half-cusp Class II and post-normal canine relationship were more frequent in females, and Class III and pre-normal canine relationship in males. Deviations from normal cuspid or molar relationships showed a weak but statistically significant association with TMD, especially in females. Half-cusp Class II and Class II relationships were more frequent in relation to joint-related TMD signs and diagnoses while missing canines were associated with pain-related TMD diagnoses. CONCLUSIONS The present study findings gave some indications that canine relationships are associated with pain-related TMD, whereas Angle II sagittal occlusal relations may associate with joint-related TMD. Occlusal characteristics should therefore be taken into account as one possible associating factor in subjects with TMD.
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Affiliation(s)
- Elisa Tervahauta
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Linnea Närhi
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Pertti Pirttiniemi
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Kirsi Sipilä
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Ritva Näpänkangas
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Mimmi Tolvanen
- Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Finland
| | - Ville Vuollo
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Anna-Sofia Silvola
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, Oulu, Finland
- Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
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17
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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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18
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Sreekumar S, Janakiram C, Mathew A. Effects of Prosthetic Rehabilitation on Temporomandibular Disorders: Protocol for a Randomized Controlled Trial. JMIR Res Protoc 2021; 10:e33104. [PMID: 34951603 PMCID: PMC8742205 DOI: 10.2196/33104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/28/2021] [Accepted: 11/10/2021] [Indexed: 01/01/2023] Open
Abstract
Background Loss of teeth or occlusal imbalance is one of the proposed dental risk factors for temporomandibular disorders (TMDs). Losing some non–free-end teeth cause the original occluding tooth/teeth to supraerupt from the original upright position and causes neighboring tooth/teeth to shift in an angle, causing biomechanical imbalance on the mandible. Based on these sequelae, rehabilitation of missing teeth is the first step in managing TMD in edentulous patients. Even though the prevalence of TMD in association with edentulism and in rehabilitated patients has been increasing, proper guidelines for the management of such cases have not been established. This study describes the protocol to analyze the effect of prosthetic rehabilitation on patients with TMD. Objective This study aims to determine the effectiveness of prosthetic rehabilitation in the reduction of pain in edentulous patients with TMD and to determine the effect of the span of edentulism, the number of quadrants involved, pathological migration, the type of Kennedy classification, and the prosthetic status on temporomandibular joint dysfunction signs and symptoms. Methods In this randomized controlled trial, 300 patients diagnosed with TMD will be grouped into one of the three interventional groups based on the type of their edentulous state. The interventional groups are (1) partially edentulous arch: Kennedy Class I and II (prosthetic rehabilitation without splint); (2) partially edentulous arch: Kennedy Class III and IV (prosthetic rehabilitation with a splint); and (3) completely edentulous arches (prosthetic rehabilitation without splint). All three of the mentioned interventional groups have corresponding control groups that will receive symptomatic treatment and comprehensive counseling. The measured primary outcomes are pain and electromyogram, and the secondary outcomes include pain drawing, Graded Chronic Pain Scale, Jaw Functional Limitation Scale, Oral Behaviours Checklist, depression, physical symptoms, and anxiety. The outcome measurements will be recorded at baseline and at the end of 24 hours, 7 days, 28 days, and 3 months. Results Ethical approval was obtained from the Institutional Review Board of Amrita Institute of Medical Sciences, Kochi, India. Study participants’ recruitment began in May 2021 and is expected to conclude in March 2023. This clinical trial protocol was developed based on the SPIRIT (Standard Protocol Items: Recommendations for Interventional Trials) 2013 Statement. Conclusions The purpose of this study is to gather data on prosthetic rehabilitation as a treatment for TMD. Obtaining this goal will aid in the development of evidence-based therapy protocols for prosthetic rehabilitation in TMD management. Trial Registration Clinical Trials Registry - India CTRI/2020/06/026169; http://ctri.nic.in/Clinicaltrials/pdf_generate.php?trialid=42381 International Registered Report Identifier (IRRID) DERR1-10.2196/33104
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Affiliation(s)
- Saranya Sreekumar
- Department of Prosthodontics and Implantology, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kerala, India
| | - Chandrashekar Janakiram
- Department of Prosthodontics and Implantology, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kerala, India
| | - Anil Mathew
- Department of Prosthodontics and Implantology, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kerala, India
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Schmalz G, Ziebolz H, Kottmann T, Ziebolz D, Laskawi R. Oral health and oral health-related quality of life in patients with oral dystonia indicates their need for dental special care. Med Oral Patol Oral Cir Bucal 2021; 26:e554-e560. [PMID: 34023846 PMCID: PMC8412451 DOI: 10.4317/medoral.24479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 03/29/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND This retrospective study aimed in the evaluation of oral health and oral health-related quality of life (OHRQoL) of patients with oral dystonia (OD). MATERIAL AND METHODS Seventeen patients with OD (Meige Syndrome: n=11, Oromandibular Dystonia: n=6) were included, of which seven were examined again at three months after botulinum toxin injection. OHRQoL was assessed by the German short form of oral health impact profile (OHIP G14). Within oral examination, dental parameters, remaining teeth and periodontitis severity were assessed. A matched healthy control (HC) was composed for comparison. RESULTS The OD patients had significantly more carious teeth (0.94 ± 1.75 vs. 0; p<0.01), less remaining teeth (15.65 ± 9.89 vs. 22.22 ± 5.91; p=0.01) and higher dental treatment need than the HC (42.9% vs. 0%; p<0.01). The OHIP G14 sum score of 9.47± 9.82 vs. 1.58 ± 2.79 (p<0.01) as well its dimensions psychosocial impact (4.47 ± 6.45 vs. 0.53 ± 1.16; p=0.03) and oral function (4.35 ± 2.98 vs. 0.47 ± 1.34; p<0.01) were clinically relevant and statistically significant higher in OD compared to HC group. No significant differences could be detected at three months after botulinum toxin injection. CONCLUSIONS Patients with OD suffer from more dental diseases and have a worse OHRQoL than HC. Dental special care appears recommendable and should be fostered by everyone, who is involved in the treatment of patients with OD.
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Affiliation(s)
- G Schmalz
- University Leipzig, Dept. of Cariology Endodontology and Periodontology Liebigstr. 12, D 04103 Leipzig, Germany
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20
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Emshoff R, Bertram A, Hupp L, Rudisch A. A logistic analysis prediction model of TMJ condylar erosion in patients with TMJ arthralgia. BMC Oral Health 2021; 21:374. [PMID: 34303363 PMCID: PMC8305951 DOI: 10.1186/s12903-021-01687-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 06/24/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In terms of diagnostic and therapeutic management, clinicians should adequately address the frequent aspects of temporomandibular joint (TMJ) osteoarthritis (OA) associated with disk displacement. Condylar erosion (CE) is considered an inflammatory subset of OA and is regarded as a sign of progressive OA changes potentially contributing to changes in dentofacial morphology or limited mandibular growth. The purpose of this study was to establish a risk prediction model of CE by a multivariate logistic regression analysis to predict the individual risk of CE in TMJ arthralgia. It was hypothesized that there was a closer association between CE and magnetic resonance imaging (MRI) indicators. METHODS This retrospective paired-design study enrolled 124 consecutive TMJ pain patients and analyzed the clinical and TMJ-related MRI data in predicting CE. TMJ pain patients were categorized according to the research diagnostic criteria for temporomandibular disorders (RDC/TMD) Axis I protocol. Each patient underwent MRI examination of both TMJs, 1-7 days following clinical examination. RESULTS In the univariate analysis analyses, 9 influencing factors were related to CE, of which the following 4 as predictors determined the binary multivariate logistic regression model: missing posterior teeth (odds ratio [OR] = 1.42; P = 0.018), RDC/TMD of arthralgia coexistant with disk displacement without reduction with limited opening (DDwoR/wLO) (OR = 3.30, P = 0.007), MRI finding of disk displacement without reduction (OR = 10.96, P < 0.001), and MRI finding of bone marrow edema (OR = 11.97, P < 0.001). The model had statistical significance (chi-square = 148.239, Nagelkerke R square = 0.612, P < 0.001). Out of the TMJs, 83.9% were correctly predicted to be CE cases or Non-CE cases with a sensitivity of 81.4% and a specificity of 85.2%. The area under the receiver operating characteristic curve was 0.916. CONCLUSION The established prediction model using the risk factors of TMJ arthralgia may be useful for predicting the risk of CE. The data suggest MRI indicators as dominant factors in the definition of CE. Further research is needed to improve the model, and confirm the validity and reliability of the model.
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Affiliation(s)
- Rüdiger Emshoff
- Orofacial Pain and TMD Unit, University Clinic of Oral and Maxillofacial Surgery, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.
| | - Annika Bertram
- Otto Von Guericke University of Magdeburg, Magdeburg, Germany
| | - Linus Hupp
- University Clinic of Oral and Maxillofacial Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Ansgar Rudisch
- University Clinic of Radiology, Medical University of Innsbruck, Innsbruck, Austria
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21
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Nguyen MS, Saag M, Jagomägi T, Nguyen QH, Voog-Oras Ü. The impact of occlusal support on temporomandibular disorders: a literature review. PROCEEDINGS OF SINGAPORE HEALTHCARE 2021. [DOI: 10.1177/20101058211023779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Temporomandibular disorders are a multifactorial disease. Occlusal support and the number of teeth in dentition have significant effects on the masticatory system. The current study aims to review the role of occlusal support in association with findings of temporomandibular disorders. Data sources were PubMed, Web of Science and Google Scholar, with 1411 citations published over the period 1992–2019. The selection criteria stipulated that articles must have reported the association between the number of teeth, occlusal unit, occlusal support and temporomandibular disorders. A total of 15 full-text articles was finally accessed for eligibility in the current review. The studies on temporomandibular disorders were collected from various sources, including articles reporting temporomandibular disorder symptoms ( n=1), temporomandibular disorder signs ( n=5), temporomandibular joint osseous changes ( n=1), temporomandibular joint dysfunction using the Helkimo index ( n=2), and temporomandibular disorder classification ( n=6). Of these articles, significant associations were found between: the number of missing teeth and temporomandibular disorders ( n=5); the number of occlusal units and occlusal supports and temporomandibular disorders ( n=3); the position of the lost occlusal units and temporomandibular disorders ( n=1). Loss of the occlusal unit has more impact on temporomandibular disorders than the loss of posterior teeth. The total loss of unilateral occlusal support seems to be an aetiological factor for temporomandibular disorders, and maintenance of balanced posterior occlusal support has a role in the prevention and management of temporomandibular disorders.
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Affiliation(s)
- Minh Son Nguyen
- Faculty of Dentistry, Danang University of Medical Technology and Pharmacy, Vietnam
| | - Mare Saag
- Institute of Dentistry, University of Tartu, Estonia
| | | | - Quang Hai Nguyen
- Department of Surgery – Anesthesia and Resuscitation, Danang Hospital of Odonto-Stomatology, Vietnam
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Al-Zahrani MS, Alhassani AA, Zawawi KH. Tooth loss as a potential risk factor for deficient sleep: an analysis of a nationally representative sample of adults in the USA. Sleep Breath 2021; 25:1101-1107. [PMID: 32583273 DOI: 10.1007/s11325-020-02131-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/28/2020] [Accepted: 06/13/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE Sleep deficiency is implicated as a risk factor for several systemic conditions. Loss of teeth has a profound effect on the individual's physiologic and psychologic health and quality of life. This study aimed to assess the association between tooth loss and sleep duration and determine if anterior and/or posterior tooth loss is a significant predictor. METHODS A total of 22,483 individuals ≥ 18 years who participated in the United States National Health and Nutrition Examination Survey (NHANES) 2005-2016 cycles were included. Multinomial logistic regression adjusted for age, gender, race/ethnicity, smoking, diabetes, body mass index, socioeconomic level, education, alcohol, and depression was performed to examine the association between sleep duration and tooth loss. RESULTS Compared to individuals with > 20 remaining teeth, those who were completely edentulous, had 1-10 or 11-20 teeth remaining were more likely to be in the deficient sleep category (OR [95% CI] = 1.59 [1.35-1.87], 1.29 [1.07-1.54], and 1.26 [1.11-1.43], respectively). When the numbers of both missing anterior and posterior teeth were entered in the model, only posterior teeth were significant. There was a 4% increase in the odds of being in the deficient sleep category for each missing posterior tooth (OR [95% CI] = 1.04 [1.02-1.05]). CONCLUSIONS Tooth loss was significantly associated with deficient sleep and posterior tooth loss appeared to be the main contributor. Although further research is needed to clarify the nature of this association, our results suggest that improving oral health might have an impact on overall health and quality of life.
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Affiliation(s)
- Mohammad S Al-Zahrani
- Department of Periodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ahmed A Alhassani
- Department of Periodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Khalid H Zawawi
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.
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23
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Impacts of Tooth Loss on OHRQoL in an Adult Population in Cape Town, South Africa. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18094989. [PMID: 34066645 PMCID: PMC8125865 DOI: 10.3390/ijerph18094989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 11/22/2022]
Abstract
(1) Background: Tooth loss is an important component of the global burden of oral disease, greatly reducing the quality of life of those affected. Tooth loss can also affect diet and subsequent incidences of lifestyle diseases, such as hypertension and metabolic syndromes. This study aimed to evaluate the oral health-related quality of life (OHRQoL) score using the oral impacts on daily performance (OIDP) index in relation to tooth loss patterns among adults. (2) Methods: From 2014 to 2016, a cross-sectional study was conducted on adults living in Bellville South, Cape Town, South Africa. The OHRQoL measure was used to evaluate the impact of tooth loss. (3) Results: A total of 1615 participants were included, and 143 (8.85%) had at least one impact (OIDP > 0). Males were less likely to experience at least one impact compared to the females, OR=0.6, 95% C.I.: 0.385 to 0.942, p = 0.026. Those participants who did not seek dental help due to financial constraints were 6.54 (4.49 to 9.54) times more likely to experience at least one impact, p < 0.001. (4) Conclusions: Tooth loss did not impact the OHRQoL of these subjects. There was no difference in the reported odds for participants experiencing at least one oral impact with the loss of their four anterior teeth, the loss of their posterior occlusal pairs, or the loss of their other teeth.
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24
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Yamaguchi S, Watanabe M, Hattori Y. Statistical parametric mapping of three-dimensional local activity distribution of skeletal muscle using magnetic resonance imaging (MRI). Sci Rep 2021; 11:4808. [PMID: 33637801 PMCID: PMC7910551 DOI: 10.1038/s41598-021-84247-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 02/15/2021] [Indexed: 11/23/2022] Open
Abstract
Analysis of the internal local activity distribution in human skeletal muscles is important for managing muscle fatigue/pain and dysfunction. However, no method is established for three-dimensional (3D) statistical analysis of features of activity regions common to multiple subjects during voluntary motor tasks. We investigated the characteristics of muscle activity distribution from the data of ten healthy subjects (29 ± 1 year old, 2 women) during voluntary teeth clenching under two different occlusal conditions by applying spatial normalization and statistical parametric mapping (SPM) to analysis of muscle functional magnetic resonance imaging (mfMRI) using increase in transverse relaxation time (T2) of the skeletal muscle induced by exercise. The expansion of areas with significant T2 increase was observed in the masticatory muscles after clenching with molar loss comparing with intact dentition. The muscle activity distribution characteristics common to a group of subjects, i.e., the active region in the temporal muscle ipsilateral to the side with the molar loss and medial pterygoid muscle contralateral to the side with the molar loss, were clarified in 3D by applying spatial normalization and SPM to mfMRI analysis. This method might elucidate the functional distribution within the muscles and the localized muscular activity related to skeletal muscle disorders.
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Affiliation(s)
- Satoshi Yamaguchi
- Division of Aging and Geriatric Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
| | - Makoto Watanabe
- Division of Aging and Geriatric Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.,Institute of Living and Environmental Sciences, Miyagi Gakuin Women's University, 9-1-1 Sakura-ga-oka, Aoba-ku, Sendai, Miyagi, 981-8557, Japan
| | - Yoshinori Hattori
- Division of Aging and Geriatric Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
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25
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Arayapisit T, Ngamsom S, Duangthip P, Wongdit S, Wattanachaisiri S, Joonthongvirat Y, Mitrirattanakul S. Understanding the mandibular condyle morphology on panoramic images: A conebeam computed tomography comparison study. Cranio 2020:1-8. [PMID: 33297888 DOI: 10.1080/08869634.2020.1857627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Objective: To compare variations in condylar morphology (CM) in panoramic images with those demonstrated in cone beam computed tomography (CBCT) and to investigate factors related to the variations.Methods: Three thousand panoramic images were analyzed for CM classification and relationship between CM and patient factors. Then, CM of 178 cases of panoramic and CBCT images were compared.Results: CM was classified into five types: round (70.63%), pointed (15.12%), angled (8.43%), flat (4.53%), and irregular (1.28%). CM was significantly related to all patient factors (p < 0.001). Round CM in panoramic images presented as round in CBCT images. Pointed and flat CM were observed mainly in the lateral aspect of the condyle, and no angle-shaped CM was found, according to CBCT images.Conclusion: Round, flat, and pointed CM seen on panoramic images possibly reflected the actual shape of the condyle, as confirmed by CBCT, whereas angled CM appeared not to exist.
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Affiliation(s)
- Tawepong Arayapisit
- Department of Anatomy, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Supak Ngamsom
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | | | - Sarut Wongdit
- Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | | | | | - Somsak Mitrirattanakul
- Department of Masticatory Science, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
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26
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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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27
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YILMAZ B, SOMAY E. Temporomandibular eklem bozukluğu tanısının manyetik rezonans görüntüleme ile doğrulanması. CUKUROVA MEDICAL JOURNAL 2020. [DOI: 10.17826/cumj.687196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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28
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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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Liu X, Zhou KX, Yin NN, Zhang CK, Shi MH, Zhang HY, Wang DM, Xu ZJ, Zhang JD, Li JL, Wang MQ. Malocclusion Generates Anxiety-Like Behavior Through a Putative Lateral Habenula-Mesencephalic Trigeminal Nucleus Pathway. Front Mol Neurosci 2019; 12:174. [PMID: 31427925 PMCID: PMC6689965 DOI: 10.3389/fnmol.2019.00174] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/01/2019] [Indexed: 01/06/2023] Open
Abstract
Malocclusion is an important risk factor for temporomandibular disorder (TMD), a series of disorders characterized by dysfunction in the orofacial region involving the temporomandibular joint (TMJ) and jaw muscles. We recently showed that experimental unilateral anterior crossbite (UAC) produced masseter hyperactivity through a circuit involving the periodontal proprioception, trigeminal mesencephalic nucleus (Vme), and trigeminal motor nucleus (Vmo). Anxiety is a common complication in patients with TMD. The lateral habenula (LHb) is involved in emotional modulation and has direct projections to the Vme. Therefore, the present research examined whether UAC facilitates excitatory input from the LHb to the Vme and, subsequently, anxiety-like behaviors in rats. The LHb activation was evaluated by the electrophysiological recording, assessment of vesicular glutamate transporter-2 (VGLUT2) mRNA expression, and measurement of anxiety-like behaviors. The effects of LHb activity on Vme were evaluated by electrophysiological recording from Vme neurons and local changes in VGLUT2 protein density. UAC produced anxiety in modeled rats and increased neuronal activity in the LHb. VGLUT2 mRNA expression was also increased in the LHb. Further, VGLUT2-positive boutons were observed in close apposite upon parvalbumin (PV)-labeled Vme neurons. VGLUT2 protein expression was also increased in the Vme. Significantly, injection of VGLUT2-targeted shRNA into the LHb reduced the expression of VGLUT2 protein in the Vme, attenuated UAC-associated anxiety-like behaviors, and attenuated electrophysiological changes in the Vme neurons. In conclusion, we show that UAC activates the LHb neurons as well as the periodontal proprioceptive pathway to provide excitatory input to the Vme and produce anxiety in rats. These findings provide a rationale for suppressing activity of the LHb to attenuate both the physical and psychological effects of TMD.
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Affiliation(s)
- Xin Liu
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology, National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China.,Department of Stomatology, The 960th Hospital of People's Liberation Army, Jinan, China
| | - Kai-Xiang Zhou
- Department of Anatomy, Histology and Embryology and K.K. Leung Brain Research Center, The Fourth Military Medical University, Xi'an, China
| | - Nan-Nan Yin
- Department of Stomatology, The 960th Hospital of People's Liberation Army, Jinan, China
| | - Chun-Kui Zhang
- Department of Anatomy, Histology and Embryology and K.K. Leung Brain Research Center, The Fourth Military Medical University, Xi'an, China
| | - Ming-Hong Shi
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology, National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Hong-Yun Zhang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology, National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Dong-Mei Wang
- Department of Oral Medicine, School of Stomatology, Xinxiang Medical University, Xinxiang, China
| | - Zi-Jun Xu
- School of Clinical Medicine, University of South China, Hengyang, China
| | - Jing-Dong Zhang
- Department of Anesthesiology, University of Cincinnati Medical College of Medicine, Cincinnati, OH, United States
| | - Jin-Lian Li
- Department of Anatomy, Histology and Embryology and K.K. Leung Brain Research Center, The Fourth Military Medical University, Xi'an, China
| | - Mei-Qing Wang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology, National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
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30
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Qi K, Xu YF, Guo SX, Xiong W, Wang MQ. Vertical contact tightness of occlusion comparison between orofacial myalgia patients and asymptomatic controls: a pilot study. J Int Med Res 2018; 46:4952-4964. [PMID: 30387387 PMCID: PMC6300976 DOI: 10.1177/0300060518782346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE The association between occlusal contact and orofacial pain remains unclear. The aim of this study was to detect occlusal contact tightness by using a new method and to compare differences between patients and asymptomatic controls. METHODS Fifteen female patients with orofacial myalgia and fifteen age- and sex-matched asymptomatic controls were enrolled. Occlusal contacts were recorded by making bite imprints. The numbers, sizes, and distributions of the contacts were detected by making photos of bite imprints after biting. The Mann-Whitney U test and ANOVA were used for statistical analysis. RESULTS In myalgia patients, impact contacts at the molar regions were more frequent, larger in number and area size, and were distributed more on guiding cusps, compared with impact contacts in asymptomatic controls. CONCLUSION Our new method revealed more prevalent and more severe impact contacts in orofacial myalgia patients, compared with asymptomatic controls.
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Affiliation(s)
- Kun Qi
- 1 Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research & Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, Department of Orthodontics, Stomatological Hospital, Xi'an Jiaotong University, Xi'an, P. R. China.,2 State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Disease & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, P. R. China
| | - Yi-Fei Xu
- 2 State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Disease & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, P. R. China
| | - Shao-Xiong Guo
- 2 State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Disease & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, P. R. China
| | - Wei Xiong
- 2 State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Disease & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, P. R. China
| | - Mei-Qing Wang
- 2 State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Disease & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, P. R. China
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31
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Liu X, Zhang C, Liu Q, Zhou K, Yin N, Zhang H, Shi M, Liu X, Wang M. Dental malocclusion stimulates neuromuscular circuits associated with temporomandibular disorders. Eur J Oral Sci 2018; 126:466-475. [DOI: 10.1111/eos.12579] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Xin Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases; Department of Oral Anatomy and Physiology; School of Stomatology; The Fourth Military Medical University; Xi'an China
- Department of Stomatology; The 456th Hospital of People's Liberation Army; Jinan China
| | - Chunkui Zhang
- Department of Anatomy, Histology and Embryology and K.K. Leung Brain Research Centre; The Fourth Military Medical University; Xi'an China
| | - Qian Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases; Department of Oral Anatomy and Physiology; School of Stomatology; The Fourth Military Medical University; Xi'an China
| | - Kaixiang Zhou
- Department of Anatomy, Histology and Embryology and K.K. Leung Brain Research Centre; The Fourth Military Medical University; Xi'an China
| | - Nannan Yin
- Department of Stomatology; The 456th Hospital of People's Liberation Army; Jinan China
| | - Hongyun Zhang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases; Department of Oral Anatomy and Physiology; School of Stomatology; The Fourth Military Medical University; Xi'an China
| | - Minghong Shi
- School of Stomatology; The Third Affiliated Hospital of Xinxiang Medical University; Xinxiang China
| | - Xiaodong Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases; Department of Oral Anatomy and Physiology; School of Stomatology; The Fourth Military Medical University; Xi'an China
| | - Meiqing Wang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases; Department of Oral Anatomy and Physiology; School of Stomatology; The Fourth Military Medical University; Xi'an China
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32
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Jussila P, Krooks L, Näpänkangas R, Päkkilä J, Lähdesmäki R, Pirttiniemi P, Raustia A. The role of occlusion in temporomandibular disorders (TMD) in the Northern Finland Birth Cohort (NFBC) 1966. Cranio 2018; 37:231-237. [PMID: 29308993 DOI: 10.1080/08869634.2017.1414347] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To investigate the role of occlusion in temporomandibular disorders (TMDs) in the Northern Finland Birth Cohort 1966 (NFBC 1966). METHODS Subjects (n = 1962) participated in clinical medical and dental examinations. The association between TMD signs and diagnoses with occlusal disturbances, i.e. malocclusions and occlusal interferences, was examined. Pearson's chi-square test, as expressed by odds ratios (OR) and 95% confidence intervals (CI) and logistic regression models, were used in the analysis. RESULTS A statistically significant association was found between myalgia and lateral scissor bite and also between arthralgia and lateral deviation in the retruded contact position and intercuspal contact position (RCP-ICP) slide. Pain in the masticatory muscles was associated with negative overjet and the amount of RCP-ICP slide. DISCUSSION Occlusal factors showed a statistically significant association with TMD. The TMD signs were associated with unstable occlusion, especially the amount and lateral deviation in RCP-ICP slide, as well as negative overjet.
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Affiliation(s)
- Päivi Jussila
- a Research Unit of Oral Health Sciences, Faculty of Medicine , University of Oulu , Oulu , Finland.,b Medical Research Center , Oulu University Hospital and University of Oulu , Oulu , Finland
| | - Laura Krooks
- a Research Unit of Oral Health Sciences, Faculty of Medicine , University of Oulu , Oulu , Finland.,b Medical Research Center , Oulu University Hospital and University of Oulu , Oulu , Finland
| | - Ritva Näpänkangas
- a Research Unit of Oral Health Sciences, Faculty of Medicine , University of Oulu , Oulu , Finland.,b Medical Research Center , Oulu University Hospital and University of Oulu , Oulu , Finland
| | - Jari Päkkilä
- c Department of Mathematical Sciences , University of Oulu , Oulu , Finland
| | - Raija Lähdesmäki
- a Research Unit of Oral Health Sciences, Faculty of Medicine , University of Oulu , Oulu , Finland.,b Medical Research Center , Oulu University Hospital and University of Oulu , Oulu , Finland
| | - Pertti Pirttiniemi
- a Research Unit of Oral Health Sciences, Faculty of Medicine , University of Oulu , Oulu , Finland.,b Medical Research Center , Oulu University Hospital and University of Oulu , Oulu , Finland
| | - Aune Raustia
- a Research Unit of Oral Health Sciences, Faculty of Medicine , University of Oulu , Oulu , Finland.,b Medical Research Center , Oulu University Hospital and University of Oulu , Oulu , Finland
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33
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Zhang J, Liao L, Zhu J, Wan X, Xie M, Zhang H, Zhang M, Lu L, Yang H, Jing D, Liu X, Yu S, Lu XL, Chen C, Shan Z, Wang M. Osteochondral Interface Stiffening in Mandibular Condylar Osteoarthritis. J Dent Res 2018; 97:563-570. [PMID: 29298566 DOI: 10.1177/0022034517748562] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Osteoarthritis (OA) of the temporomandibular joint (TMJ) is associated with dental biomechanics. A major change during OA progression is the ossification of the osteochondral interface. This study investigated the formation, radiological detectability, and mechanical property of the osteochondral interface at an early stage, the pathogenesis significance of which in OA progression is of clinical interest and remains elusive for the TMJ. Unilateral anterior crossbite (UAC) was performed on 6-wk-old rats as we previously reported. TMJs were harvested at 4, 12, and 20 wk. The progression of TMJ OA was evaluated using a modified Osteoarthritis Research Society International (OARSI) score system. Osteochondral interface was investigated by quantifying the thickness via von Kossa staining of histological slices and in vivo calcium deposition by calcein injection. Tissue ossification was imaged by micro-computed tomography (CT). Mechanical properties were measured at nanoscale using dynamic indentation. Time-dependent TMJ cartilage lesions were elicited by UAC treatment. Geometric change of the condyle head and increased value of the OARSI score were evident in UAC TMJs. At the osteochondral interface, there was not only enhanced deep-zone cartilage calcification but also calcium deposition at the osseous boundary. The thickness, density, and stiffness of the osteochondral interface were all significantly increased. The enhanced ossification of the osteochondral interface is a joint outcome of the aberrant deeper cartilage calcification at the superior region and promoted formation of subchondral cortical bone at the inferior region. The micro-CT detectable ossification from an early stage thus is of diagnostic significance. Although the environment of the cartilage and subchondral bone could be changed due to the stiffness of the interface, whether or not the stiffened interface would accelerate OA progress remains to be confirmed. With that evidence, the osteochondral interface could be a new diagnostic and therapeutic target of the mechanically initiated OA in the TMJ.
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Affiliation(s)
- J Zhang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - L Liao
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China.,2 Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Department of Implant Dentistry, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - J Zhu
- 3 Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
| | - X Wan
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - M Xie
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - H Zhang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - M Zhang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - L Lu
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - H Yang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - D Jing
- 4 School of Biomedical Engineering, the Fourth Military Medical University, Xi'an, China
| | - X Liu
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - S Yu
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - X L Lu
- 5 Department of Mechanical Engineering, University of Delaware, Newark, DE, USA
| | - C Chen
- 6 Department of Health Statistics, the Fourth Military Medical University, Xi'an, China
| | - Z Shan
- 3 Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
| | - M Wang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
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Chatzopoulos GS, Sanchez M, Cisneros A, Wolff LF. Prevalence of temporomandibular symptoms and parafunctional habits in a university dental clinic and association with gender, age, and missing teeth. Cranio 2017; 37:159-167. [PMID: 29143569 DOI: 10.1080/08869634.2017.1399649] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Objective To assess the prevalence of symptoms of temporomandibular disorder (TMD) and parafunctional habits as well as to investigate their association with age, gender, and number of missing teeth. Methods This retrospective study is based on 4204 randomly selected patients who were examined to determine their symptoms of TMD, such as clicking, difficulty chewing, difficulty opening/closing, as well self-reported joint pain and parafunctional habits. Results Clenching/grinding was reported by 26.5% of the examined population, clicking by 14.8%, and difficulty chewing and closing by 3.6%. Significant associations between the number of missing teeth with clenching/grinding (p = 0.05) and difficulty chewing (p < 0.001) were detected. Age and gender showed significant effects on the examined parameters (p < 0.05). Discussion Understanding the TMD subjective symptoms in relation to age, gender, and tooth loss would be of great value for treatment planning and could provide other perspectives to establish preventive measures.
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Affiliation(s)
- Georgios S Chatzopoulos
- a Department of Developmental and Surgical Sciences, Division of Periodontology, School of Dentistry , University of Minnesota , Minneapolis , MN , USA
| | - Miguel Sanchez
- b School of Dentistry , University of Minnesota , Minneapolis , MN , USA
| | - Alejandro Cisneros
- b School of Dentistry , University of Minnesota , Minneapolis , MN , USA
| | - Larry F Wolff
- a Department of Developmental and Surgical Sciences, Division of Periodontology, School of Dentistry , University of Minnesota , Minneapolis , MN , USA
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Manola M, Hussain F, Millar BJ. Is the shortened dental arch still a satisfactory option? Br Dent J 2017; 223:108-112. [PMID: 28729593 DOI: 10.1038/sj.bdj.2017.625] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2017] [Indexed: 12/28/2022]
Abstract
Aims Dental practitioners may hold the view that missing posterior teeth should be replaced to ensure a healthy masticatory system and satisfactory oral function. However, the shortened dental arch (SDA) concept is still in use, but after 35 years is it acceptable? This review searches the literature for the evidence and opinions regarding the suitability of the SDA as a current treatment modality.Methods Medline and PubMed databases were searched for relevant terms, all the abstracts were assessed and articles selected according to the pre-set exclusion and inclusion criteria.Results The search yielded 1,895 articles and after the assessment of the abstracts and application of the exclusion and inclusion criteria, 44 articles were selected for this review. These included 11 cohort studies, two longitudinal studies, two animal studies, three cross sectional studies, eight clinical studies and 18 case control studies. There appears to be a trend over the past three decades for more papers to be opposed to the SDA concept.Conclusion Evidence that the SDA causes pathology is lacking. Clinicians, healthcare authorities and patients have shown favourable attitudes towards the SDA and this continues, although there is an increase in studies opposing the concept and some are dissatisfied with this option. The concept remains viable particularly for the medically compromised patient or where restorations are considered unsuitable but further more specific studies are warranted.
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Affiliation(s)
- M Manola
- General Dental Practitioner, Thurnscoe Dental Care, Wincobank Dental Practice
| | - F Hussain
- Clinical Senior Lecturer, Deputy Director of Fixed and Removable Prosthodontics Programme
| | - B J Millar
- Professor, Director of Fixed and Removable Prosthodontics Programme, Consultant in Restorative Dentistry, King's College London Dental Institute, Bessemer Road, London, SE5 9RW, UK
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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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Regeneration of Cystic Bone Cavities and Bone Defects With Bioactive Glass S53P4 in the Upper and Lower Jaws. J Craniofac Surg 2017; 28:1197-1205. [PMID: 28538076 DOI: 10.1097/scs.0000000000003649] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Cysts and tumors are common lesions in the jaws. To be able to retain a good volume of the alveolar ridge during healing as well as strengthening the angle and body of the mandible and provide an instant improved support for adjacent teeth, reliable long-term bone regeneration is needed. The purpose of this prospective study was to promote bone regeneration by filling bony defects in the upper or lower jaw with granules of the bioactive glass S53P4 (BAG), which have osteostimulative and antimicrobial properties.The authors treated 20 patients (21 defects) surgically; benign tumors, cysts, or infection related to impacted teeth in the maxilla or mandible. The tumor or cyst was removed or enucleated and thorough cleaning of the infected area was performed. The bone cavity was filled with granules of the BAG S53P4 despite signs of chronic infection in the area at the time of surgery. The patients were followed up for an average of 34 months clinically and with cone beam computerized tomography for 28 months. In 20 defects the final outcome was successful. Despite infection at the time of surgery in 65% of the patients, no material associated infection was seen during the follow-up. The BAG S53P4 granules were radiologically remodeled into bone after 2 years follow-up. The use of granules of the BAG S53P4 in the treatment of large bone defects provides infection-free reliable bone regeneration despite chronic infection at the time of surgery, which improves the prognosis of adjacent teeth.
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de S Leão R, da S Júnior EZ, de Alencar MG, Catunda RQ, de Moraes SL, do E Vasconcelos BC. Use of Mini-anchors and Rehabilitation with 0° Cusp Angle Teeth Complete Denture in Recurrent Condylar Dislocation: Technical Adequacy and Procedure. J Contemp Dent Pract 2017; 18:337-341. [PMID: 28349915 DOI: 10.5005/jp-journals-10024-2042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
AIM To report a case of association between the surgical treatment of temporomandibular dysfunction and rehabilitation with denture total prosthesis (TP) using nonanatomic teeth (cusp 0°) in patients with anterior recurrent dislocation of the temporo-mandibular joint (TMJ) and persistent uncontrolled mandibular movement, showing a technical adaptation and conduct. INTRODUCTION There are several treatment approaches available for dislocation of the TMJ. The use of condylar mini-anchors for recurrent TMJ dislocation is a valid option and should be considered since it does not alter the joint anatomy. In edentulous patients undergoing TMJ surgical procedures, prosthetic rehabilitation can be seen as a means of treatment preservation. CASE REPORT A 73-year-old female patient attended the oral and maxillofacial surgery clinic presenting with joint instability, ligament laxity, and chronic recurrent TMJ dislocations. She had already been through three previous unsuccessful surgical procedures. A treatment plan was done based on the installation of a mini-anchor in the patient's TMJ through the preauricular surgical access. Dislocations were then resolved, but the lack of mandibular control even to a lesser extent after surgery precluded the use of prosthetics even at rest. Thus, it was planned to manufacture two conventional TPs with 0° cusp angle teeth, a clinical protocol shortened to three sessions in an attempt to improve the stability of the prosthesis. CONCLUSION The use of an individual mini-anchor is simple and effective, and the use of artificial teeth is well suited to the case. CLINICAL SIGNIFICANCE A multidisciplinary intervention (surgery/ prosthesis) is of utmost importance for the resolution and preservation of the treatment of these complex cases.
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Affiliation(s)
- Rafaella de S Leão
- Department of Restorative Dentistry, Dentistry School University of Pernambuco, Recife, Brazil, Phone: +005581996933610 e-mail:
| | | | | | - Raisa Q Catunda
- Department of Dentistry, Federal University of Pernambuco Recife, Brazil
| | - Sandra Ld de Moraes
- Department of Prosthodontics, Dentistry School, University of Pernambuco, Recife, Brazil
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Zhang M, Wang H, Zhang J, Zhang H, Yang H, Wan X, Jing L, Lu L, Liu X, Yu S, Chang W, Wang M. Unilateral anterior crossbite induces aberrant mineral deposition in degenerative temporomandibular cartilage in rats. Osteoarthritis Cartilage 2016; 24:921-31. [PMID: 26746151 PMCID: PMC5699887 DOI: 10.1016/j.joca.2015.12.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 12/04/2015] [Accepted: 12/20/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate whether mechanical stress induces mineral deposits that contribute to matrix degradation at the onset of osteoarthritis (OA) in temporomandibular joint (TMJ) cartilage. DESIGN Female Spraguee-Dawley rats were subjected to an unilateral anterior crossbite (UAC) procedure. Histology, electron microscopy, and energy dispersive spectrometer (EDS) were used to examine cartilage matrix structures and composition of mineral deposit in the affected TMJ cartilage. Protein and/or RNA expression of phenotypic markers and mineralization modulators and matrix degradation was analyzed by immunohistochemistry and/or real-time PCR. Synthetic basic calcium phosphate (BCP) and calcium pyrophosphate dehydrate (CPPD) crystals were used to stimulate ATDC5 cells for their impact on cell differentiation and gene expression. RESULTS Fragmented and disorganized collagen fibers, expanded fibrous spaces, and enhancement of matrix vesicle production and mineral deposition were observed in matrices surrounding hypertrophic chondrocytes in cartilage as early as 2-weeks post-UAC and exacerbated with time. The mineral deposits in TMJ cartilage at 12- and 20-weeks post-UAC had Ca/P ratios of 1.42 and 1.44, which are similar to the ratios for BCP. The expression of mineralization inhibitors, NPP1, ANK, CD73, and Matrix gla protein (MGP) was decreased from 2 to 8 weeks post-UAC, so were the chondrogenic markers, Col-2, Col-X and aggrecan. In contrast, the expression of tissue-nonspecific alkaline phosphatase (TNAP) and MMP13 was increased 4-weeks post-UAC. Treating ADTC5 cells with BCP crystals increased MMPs and ADAMTS5 expression, but reduced matrix production in a time-dependent manner. CONCLUSION UAC induces deposition of BCP-like minerals in osteoarthritic cartilage, which can stimulate matrix degradation by promoting the expression of cartilage-degrading enzymes to facilitate OA progression.
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Affiliation(s)
- M. Zhang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - H. Wang
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - J. Zhang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - H. Zhang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - H. Yang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - X. Wan
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - L. Jing
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - L. Lu
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - X. Liu
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - S. Yu
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - W. Chang
- Endocrine Research Unit, University of California, San Francisco, Veterans Affairs Medical Center, San Francisco, USA,Department of Medicine, University of California San Francisco, USA
| | - M. Wang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China,Address correspondence and reprint requests to: M. Wang, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China. (M. Wang)
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Okada C, Yamaguchi S, Watanabe Y, Watanabe M, Hattori Y. Evaluation of masticatory activity during unilateral single tooth clenching using muscle functional magnetic resonance imaging. J Oral Rehabil 2016; 43:583-90. [PMID: 27113040 DOI: 10.1111/joor.12404] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/27/2016] [Indexed: 11/30/2022]
Abstract
Masticatory muscle activity during teeth clenching is affected by occlusal pattern. However, few studies have performed simultaneous evaluation of all masticatory activities during teeth clenching under various occlusal conditions. The aim of this study was to use muscle functional magnetic resonance imaging (mfMRI) to evaluate the effects of changes in occlusal point on masticatory activity during single tooth clenching. Changes in mean proton transverse relaxation time (∆T2) as an index of activity in all masticatory muscles during left unilateral clenching at the first molar or first premolar for 1 min were examined in nine healthy volunteers. Bite force was maintained at 40% of the maximum voluntary clenching force. The ∆T2 values of the masseter and lateral pterygoid muscles were analysed separately for superficial and deep layers, and for superior and inferior heads. The ∆T2 values for the ipsilateral deep masseter were significantly lower, and for the superior head of the ipsilateral lateral pterygoid muscles were significantly higher, after left first premolar clenching compared to left first molar clenching. These results quantitatively demonstrate a significant increase in activity of the superior head of the ipsilateral lateral pterygoid muscle and a significant decrease in activity of the ipsilateral deep masseter muscle with forward displacement of the occlusal contact point during unilateral tooth clenching.
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Affiliation(s)
- C Okada
- Division of Aging and Geriatric Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - S Yamaguchi
- Division of Aging and Geriatric Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Y Watanabe
- Department of Health Services Management, Faculty of Health Sciences, Tohoku Fukushi University, Sendai, Japan
| | - M Watanabe
- Division of Aging and Geriatric Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Kansei Fukushi Research Center, Tohoku Fukushi University, Sendai, Japan
| | - Y Hattori
- Division of Aging and Geriatric Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Chen MC, Kung PT, Su HP, Yen SM, Chiu LT, Tsai WC. Utilization of tooth filling services by people with disabilities in Taiwan. Int J Equity Health 2016; 15:58. [PMID: 27044476 PMCID: PMC4820987 DOI: 10.1186/s12939-016-0347-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 04/01/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The oral condition of people with disabilities has considerable influence on their physical and mental health. However, nationwide surveys regarding this group have not been conducted. For this study, we used the National Health Insurance Research Database to explore the tooth filling utilization among people with disabilities. METHODS Using the database of the Ministry of the Interior in 2008 which included people with disabilities registered, we merged with the medical claims database in 2008 of the Bureau of National Health Insurance to calculate the tooth filling utilization and to analyze relative factors. We recruited 993,487 people with disabilities as the research sample. RESULTS The tooth filling utilization was 17.53 %. The multiple logistic regression result showed that the utilization rate of men was lower than that of women (OR = 0.78, 95 % CI = 0.77-0.79) and older people had lower utilization rates (aged over 75, OR = 0.22, 95 % CI = 0.22-0.23) compared to those under the age of 20. Other factors that significantly influenced the low tooth filling utilization included a low education level, living in less urbanized areas, low economic capacity, dementia, and severe disability. CONCLUSION We identified the factors that influence and decrease the tooth-filling service utilization rate: male sex, old age, low education level, being married, indigenous ethnicity, residing in a low urbanization area, low income, chronic circulatory system diseases, dementia, and severe disabilities. We suggest establishing proper medical care environments for high-risk groups to maintain their quality of life.
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Affiliation(s)
- Ming-Chuan Chen
- />Department of Public Health, China Medical University, Taichung, Taiwan R.O.C
- />Department of Health Services Administration, China Medical University, 91 Hsueh-Shih Road, Taichung, 40402 Taiwan R.O.C
- />Department of Healthcare Administration, Central Taiwan University of Science and Technology, Taichung, Taiwan R.O.C
| | - Pei-Tseng Kung
- />Department of Healthcare Administration, Asia University, Taichung, Taiwan R.O.C
| | - Hsun-Pi Su
- />Department of Dental Hygiene, China Medical University, Taichung, Taiwan R.O.C
| | - Suh-May Yen
- />Department of Chinese Medicine, Nantou Hospital, Nantou, Taiwan R.O.C
| | - Li-Ting Chiu
- />Department of Health Services Administration, China Medical University, 91 Hsueh-Shih Road, Taichung, 40402 Taiwan R.O.C
| | - Wen-Chen Tsai
- />Department of Health Services Administration, China Medical University, 91 Hsueh-Shih Road, Taichung, 40402 Taiwan R.O.C
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Malheiros AS, Carvalhal ST, Pereira TL, Filho EMM, Tonetto MR, Gonçalves LM, Bandeca MC, De Jesus Tavarez RR. Association between Tooth Loss and Degree of Temporomandibular Disorders: A Comparative Study. J Contemp Dent Pract 2016; 17:235-239. [PMID: 27207204 DOI: 10.5005/jp-journals-10024-1833] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE The aim of this study was to evaluate the association between tooth loss and the signs and symptoms of temporomandibular disorders (TMDs). MATERIALS AND METHODS One hundred fifty patients with an average age of 49.2 (±14.06) years were divided into three groups (n = 50/group) according to the degree of tooth loss: GI (dentate -control), GII (edentulous), GIII (partially dentate). After performing anamnesis and clinical examination, a questionnaire was used, so that the patients could fill in information on signs and symptoms of TMD. After analyzing this information, it was possible to classify the degree of severity of TMD. As age is a confounding variable to the level of TMD, an analysis of covariance (ANCOVA) was used to check for differences in the degree of TMD between groups (covariate = age). A post hoc test (Bonferroni) was performed to compare the groups two by two (5% significance level). RESULTS The mean level of TMD according to the groups was GI - 1.95; GII - 2.15; GIII - 2.55. There were significant differences between the study groups (p > 0.05). A post hoc test (Bonferroni) confirmed the difference between edentulous patients and the other groups. CONCLUSION The tooth loss is directly related to the signs and symptoms of TMD. The degree of TMD was significantly higher in edentulous patients.
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Affiliation(s)
| | | | | | | | - Mateus Rodrigues Tonetto
- Department of Post Graduation Program in Integrated Dental Science University of Cuiaba, Cuiaba, Mato Grosso Brazil
| | | | - Matheus Coelho Bandeca
- Department of Post Graduation Program in Dentistry University CEUMA, São Luis, Maranhão, Brazil
| | - Rudys Rodolfo De Jesus Tavarez
- Professor, Department of Post Graduation Program in Dentistry University CEUMA, Avenida dos Holandeses No.07, Edificio Metropolitam, Calhau, São Luis, Maranhão, Brazil, CEP: 65071-380, Phone: (55)9832272360, e-mail:
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Condylar Erosion in Patients With Chronic Temporomandibular Joint Arthralgia: A Cone-Beam Computed Tomography Study. J Oral Maxillofac Surg 2016; 74:1343.e1-8. [PMID: 26899480 DOI: 10.1016/j.joms.2016.01.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 01/05/2016] [Accepted: 01/06/2016] [Indexed: 12/19/2022]
Abstract
PURPOSE The objective of this study was to assess the association between temporomandibular joint (TMJ) condylar erosion and chronic TMJ arthralgia. MATERIALS AND METHODS Based on a sample size estimation, this case-and-control study involved 198 patients 16 to 73 years old recruited from a routine clinical practice (99 cases, patients with chronic TMJ arthralgia and mean pain duration of 16.4 months; 99 controls, asymptomatic patients without a history of orofacial pain). The clinical diagnosis of arthralgia was made according to the Research Diagnostic Criteria for Temporomandibular Disorders. Cone-beam computed tomographic (CBCT) images were evaluated for the presence or absence of erosive osseous changes of the TMJ condyle. Severity of TMJ condylar erosion was classified as grade 0 (absence of erosion), grade I (slight erosion), grade II (moderate erosion), or grade III (extensive erosion). Logistic regression analysis was used to assess the association between chronic TMJ arthralgia and condylar erosion, adjusting for age, gender, number of missing posterior teeth, and number of dental quadrants with missing posterior teeth. RESULTS TMJ condylar erosion was found in 59.6% of cases and 21.2% of controls. There was a significant association between TMJ arthralgia and degree of condylar erosion (P < .001). The odds ratio that a TMJ with condylar erosion grade II might belong to the TMJ arthralgia group was strong (3.1:1; 95% confidence interval [CI], 1.17 to 8.09) and significant (P = .023). Significant increases in risk of TMJ arthralgia occurred with condylar erosion grade III (7.7:1; 95% CI, 3.09 to 19.18; P < .001). CONCLUSIONS The study provides evidence of an association between TMJ condylar erosion and chronic TMJ arthralgia.
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Moreno-Hay I, Okeson JP. Does altering the occlusal vertical dimension produce temporomandibular disorders? A literature review. J Oral Rehabil 2015; 42:875-82. [PMID: 26140528 DOI: 10.1111/joor.12326] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2015] [Indexed: 11/27/2022]
Abstract
The purpose of this review was to present a comprehensive review of the scientific evidence available in the literature regarding the effect of altering the occlusal vertical dimens-ion (OVD) on producing temporomandibular disorders. The authors conducted a PubMed search with the following search terms 'temporoman-dibular disorders', 'occlusal vertical dimension', 'stomatognatic system', 'masticatory muscles' and 'skeletal muscle'. Bibliographies of all retrieved articles were consulted for additional publications. Hand-searched publications from 1938 were included. The literature review revealed a lack of well-designed studies. Traditional beliefs have been based on case reports and anecdotal opinions rather than on well-controlled clinical trials. The available evidence is weak and seems to indicate that the stomatognathic system has the ability to adapt rapidly to moderate changes in occlusal vertical dimension (OVD). Nevertheless, it should be taken into consideration that in some patients mild transient symptoms may occur, but they are most often self-limiting and without major consequence. In conclusion, there is no indication that permanent alteration in the OVD will produce long-lasting TMD symptoms. However, additional studies are needed.
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Affiliation(s)
- I Moreno-Hay
- Orofacial Pain Center, College of Dentistry, University of Kentucky, Lexington, KY, USA
| | - J P Okeson
- Orofacial Pain Center, College of Dentistry, University of Kentucky, Lexington, KY, USA
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Alzarea BK. Temporomandibular Disorders (TMD) in Edentulous Patients: A Review and Proposed Classification (Dr. Bader's Classification). J Clin Diagn Res 2015; 9:ZE06-9. [PMID: 26023660 DOI: 10.7860/jcdr/2015/13535.5826] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 03/17/2015] [Indexed: 11/24/2022]
Abstract
Temporomandibular disorders (TMD) are a collective term given to a number of clinical problems that involve the masticatory musculature, the temporomandibular joints and associated structures, or both. Although the aetiology of TMD has not been fully understood, in general it is considered to be multifactorial. The signs and symptoms of TMD which present in patients with natural teeth may also occur in edentulous patients. These symptoms may appear in various combinations and degrees. TMD has attained a prominent role within the context of dental care due to its high prevalence. The present paper is a review of the current literature on TMD in edentulous patients; with an attempt to propose a classification for the same.
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Affiliation(s)
- Bader K Alzarea
- Assistant Professor, Department of Prosthodontics, College of Dentistry, AlJouf University , Skaka, AlJouf, Kingdom Saudi Arabia
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de Sousa ST, de Mello VVC, Magalhães BG, de Assis Morais MPL, Vasconcelos MMVB, de França Caldas Junior A, Gomes SGF. The role of occlusal factors on the occurrence of temporomandibular disorders. Cranio 2014; 33:211-6. [PMID: 25027731 DOI: 10.1179/2151090314y.0000000015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
AIMS The aim of this study was to investigate the relationship between occlusal factors and temporomandibular disorders (TMD). METHODOLOGY One hundred patients were selected among those who sought medical or dental care in public practice in Recife, Brazil. The presence of malocclusions and absence of five or more posterior teeth were evaluated by the clinical exam. TMD diagnosis was given using Research Diagnostic Criteria (RDC/TMD). Statistics were carried out using Fisher and Mann-Whitney methods with 5% significance level, as well as multiple logistic regression analysis. RESULTS The sample was mainly comprised of women (83%), individuals over 30 years old (57%) and singles (53%). The percentage of TMD and malocclusion in total sample was 42% and 50%, respectively, while in TMD subjects, malocclusion was present in 38.1%. There was no association between TMD and the occlusal factors studied. CONCLUSION It can be concluded that malocclusion and loss of five or more posterior teeth does not contribute to TMD.
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Zhang Q, Witter DJ, Bronkhorst EM, Creugers NHJ. Chewing ability in an urban and rural population over 40 years in Shandong Province, China. Clin Oral Investig 2014; 17:1425-35. [PMID: 22940739 PMCID: PMC3663989 DOI: 10.1007/s00784-012-0822-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Accepted: 08/02/2012] [Indexed: 11/29/2022]
Abstract
Objectives This study aimed to assess chewing ability related to dental status. Material and methods One thousand four hundred sixty-two Chinese subjects over 40 years, dentate in both jaws, were categorized in a hierarchical functional classification system with and without tooth replacements. Chewing ability was analyzed using multivariable logistic regression including five dental conditions (≥10 teeth in each jaw’; ‘complete anterior regions’; “sufficient premolar regions’ (≥3 posterior occluding pairs (POPs)); ‘sufficient molar regions’ (bilaterally ≥1 POP); and tooth replacement), adjusted for six background variables. Likelihood ratios for chewing problems were assessed at each level of the hierarchical classification system based on these dental conditions. Results Seventy-eight to 91 % of subjects reported no or minor chewing problems. The conditions ‘≥10 teeth in each jaw’, and ‘complete anterior regions’ were not associated, whereas ‘sufficient’ premolar regions’ and ‘sufficient molar regions’ were associated with chewing problems (Ors, 0.33–0.58). If classified hierarchically, the condition ‘≥10 teeth in each jaw’ was relevant for chewing problems (likelihood ratios 3.3–3.7). ‘Sufficient premolar region’ and ‘sufficient molar region’ were relevant to reduce the likelihood ratios for having chewing problems (both approximately with a factor 2), both for soft and for hard foods. Subjects with artificial teeth added had similar chance for chewing problems compared to counterparts with natural teeth only. However, if comparing replaced teeth with natural teeth, subjects with tooth replacement showed higher chance for chewing problems. Conclusions Chewing ability was strongly associated with dental conditions. Clinical relevance The presence of at least 10 teeth in each jaw had highest impact on chewing ability.
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Affiliation(s)
- Qian Zhang
- Department of Prosthetic Dentistry, Affiliated Hospital of Medical School, Qingdao University, Jiangsu Road 16#, Qingdao, People’s Republic of China.
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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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Liu YD, Liao LF, Zhang HY, Lu L, Jiao K, Zhang M, Zhang J, He JJ, Wu YP, Chen D, Wang MQ. Reducing dietary loading decreases mouse temporomandibular joint degradation induced by anterior crossbite prosthesis. Osteoarthritis Cartilage 2014; 22:302-12. [PMID: 24316289 PMCID: PMC4111231 DOI: 10.1016/j.joca.2013.11.014] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 11/10/2013] [Accepted: 11/26/2013] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Dietary loading has been reported to have an effect on temporomandibular joint (TMJ) remodeling via periodontal-muscular reflex. We therefore examined whether reducing dietary loading decreased TMJ degradation induced by the unilateral anterior crossbite prosthesis as we recently reported. METHODS Forty 6-week-old female C57BL/6J mice were randomly divided into two experimental and two control groups. One experimental and one control group received small-size diet and the other two groups received large-size diet. Unilateral anterior crossbite prosthesis was created in the two experimental groups. The TMJ samples were collected 3 weeks after experimental operation. Histological changes in condylar cartilage and subchondral bone were assessed by Hematoxylin & Eosin, toluidine blue, Safranin O and tartrate-resistant acid phosphatase staining. Real-time polymerase chain reaction (PCR) and/or immunohistochemistry were performed to evaluate the expression levels of Collagen II, Aggrecan, a disintegrin and metalloproteinase with thrombospondin motifs 5 (ADAMTS-5) and RANKL/RANK/OPG in TMJ condylar cartilage and/or subchondral bone. RESULTS Thinner and degraded cartilage, reduced cartilage cellular density, decreased expression levels of Collagen II and Aggrecan, loss of subchondral bone and enhanced osteoclast activity were observed in TMJs of both experimental groups. However, the cartilage degradation phenotype was less severe and cartilage ADAMTS-5 mRNA was lower while OPG/RANKL ratio in cartilage and subchondral bone was higher in the small-size than large-size diet experimental group. No differences of histomorphology and the tested molecules were found between the two control groups. CONCLUSIONS The current findings suggest that a lower level of functional loading by providing small-size diet could reduce TMJ degradation induced by the biomechanical stimulation from abnormal occlusion.
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Affiliation(s)
- Y.-D. Liu
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China
| | - L.-F. Liao
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China
| | - H.-Y. Zhang
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China
| | - L. Lu
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China
| | - K. Jiao
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China
| | - M. Zhang
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China
| | - J. Zhang
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China
| | - J.-J. He
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China
| | - Y.-P. Wu
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, 15 Changlexi Road, Xi’an 710032, China
| | - D. Chen
- Department of Biochemistry, Rush University Medical Center, Chicago, IL, USA
| | - M.-Q. Wang
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China,Address correspondence and reprint requests to: M.-Q. Wang, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi’an 710032, China. Tel: 86-29-84776144; Fax: 86-29-83286858. , (M.-Q. Wang)
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Zhang M, Zhang J, Lu L, Qiu ZY, Zhang X, Yu SB, Wu YP, Wang MQ. Enhancement of chondrocyte autophagy is an early response in the degenerative cartilage of the temporomandibular joint to biomechanical dental stimulation. Apoptosis 2014; 18:423-34. [PMID: 23386193 DOI: 10.1007/s10495-013-0811-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Autophagy is a cell protective mechanism for maintaining cellular homeostasis. The present study aimed to investigate whether autophagy is enhanced in the biomechanically induced degenerative cartilage of the temporomandibular joint (TMJ) and the potential role of mitogen-activated protein kinase kinase kinase kinase 3 (MAP4K3) and mammalian Target of rapamycin (mTOR) in this observation. To induce degenerative changes in the TMJs, rats were subjected to biomechanical dental stimulation by moving 4 molars away from their original position as we previously reported. The ultrastructure of autophagosome was observed by transmission electron microscopy. The number of lysosomes was analyzed by flow cytometry. The expression levels of Beclin1 and LC3 and the involvement of MAP4K3 activity were detected by immunohistochemistry, real-time PCR and western blot. The activity of the mTOR pathway indicated by p-mTOR and p-p70S6 K was assayed by western blot. TMJ degeneration, characterized by irregular cell arrangement and cell-free area, was induced in the experimental groups. Under transmission electron microscopy, we observed the presence of autophagosomes, small patches of condensed chromatin, abundant rough endoplasmic reticulum and Golgi apparatus. The number of lysosomes and the expression levels of Beclin1 and LC3 increased, while the activity of mTOR and the expression level of MAP4K3 decreased in the experimental groups. Cartilage in TMJ which was induced to be degenerative biomechanically exhibited autophagy accompanied by reduced mTOR and MAP4K3 activity.
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Affiliation(s)
- Mian Zhang
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, 145 Changlexi Road, Xi'an 710032, China
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