Associations between mandibular torus and types of temporomandibular disorders, and the clinical usefulness of temporary splint for checking bruxism

BMC Oral Health

Hee-Min Lee¹  Dong-Woo Kang¹  Pil-Young Yun¹  Il-hyung Kim²  Young-Kyun Kim³ 

[1] Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 82 Gumi-ro 173beon-gil, Bundang-gu, 13620, Seongnam, Korea;Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 82 Gumi-ro 173beon-gil, Bundang-gu, 13620, Seongnam, Korea;Office of Human Resources Development, Armed Forces Capital Hospital, Armed Forces Medical Command, Seongnam, Korea;Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 82 Gumi-ro 173beon-gil, Bundang-gu, 13620, Seongnam, Korea;School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea;

关键词: Mandibular torus;    Temporomandibular disorders;    Oral parafunctional habits;    Bruxism;    Clenching;    Splint;    Temporary splint for checking bruxism;   

DOI  :  10.1186/s12903-021-01550-y

来源: Springer

【 摘 要 】

BackgroundOcclusal stress from oral parafunctional habits is one of the causes of temporomandibular disorders (TMD) and mandibular torus (MT). Although some studies have investigated the correlation between TMD and MT, understanding of the relationships between types of TMD and MT is insufficient. Therefore, we conducted this study to investigate the associations between presence of MT and TMD types.MethodsThis study included 77 patients diagnosed with TMD who first visited our clinic for TMD between March 2019 and July 2020. Among them, 30 (38.9%) had MT, and 54 (70.1%) had oral parafunction. Parafunctional activity during sleep was confirmed using a temporary splint for checking bruxism (TSCB).ResultsThe relationship between prevalence of MT and oral parafunction in TMD patients was not statistically significant (P = 0.131), but the odds ratio was relatively high at 2.267. An analysis of TMD type revealed that Type I, which is classified as myalgia of the masticatory muscles, and MT had a significant association (P = 0.011). We fabricated a TSCB for 27 patients to wear during sleep and confirmed that 23 (85.2%) had nocturnal bruxism. The TSCB results and presence of MT showed a significant relationship (P = 0.047).ConclusionThrough the results of this study, clinicians may consider the hyperactivity of masticatory muscles in the presence of MT when treating TMD patients. In addition, TSCB has a great diagnostic value as it can be easily manufactured and be useful for discovering pre-existing oral parafunctions that patients are not aware of.

【 授权许可】

CC BY