The presence or absence of disc perforation (DP) has great value for the treatment planning of temporomandibular disorders (TMDs). Epidemiologic features of DP are limited in the literature. The present study investigated the epidemiologic features of DP by retrospectively reviewing 13,556 temporomandibular joint arthrographic examinations. Pearson Chi-squared test demonstrated that the rate of male patients who received the examinations more than once was significantly lower than that of female patients and the rate of DP in males was significantly lower than that in females. The age of all patients showed a bimodal distribution, with a 1st peak around 21 years of age, and a 2nd peak around 53 years of age. Linear regression analysis showed that the rate of DP was positively correlated with ages. The DP rate was increased by 0.3% for every 1 year of age. This retrospective cross-sectional study validated some findings about the gender and age differences of temporomandibular joint DP in the literature, and more importantly uncovered the exact relationship between the DP rate and the age in a large TMD patient population.
*The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education
†Department of Oral Radiology
‡The Center Clinic, School and Hospital of Stomatology, Wuhan University, Wuhan, China.
Address correspondence and reprint requests to Bo Li, PhD, DDS and Hongyu Zheng, MD, School and Hospital of Stomatology, Wuhan University, #237 Luo Yu Road, Wuhan, Hubei 430079, China; E-mails: firstname.lastname@example.org; email@example.com
Received 26 August, 2018
Accepted 6 October, 2018
This work was supported by the National Natural Science Foundation of China (grant nos: 81801001, 81570995, and 81500878).
The authors report no conflicts of interest.