Stomatology ›› 2026, Vol. 46 ›› Issue (1): 48-53.doi: 10.13591/j.cnki.kqyx.2026.01.008

• Basic and Clinical Research • Previous Articles     Next Articles

Correlation between the changes of articular disc and mandibular morphology in adult women with temporomandibular disorders symptoms

YIN Xiaoli1,2, LIU Yang3()   

  1. Department of Pediatric Dentistry, Tianjin Stomatological Hospital, School of Medicine, Nankai University, Tianjin 300041, China
  • Received:2025-06-25 Online:2026-01-28 Published:2026-01-16
  • Contact: LIU Yang E-mail:liu@scu.edu.cn

Abstract:

Objective To analyze the relationship between the morphology and position of the temporomandibular joint disc and the vertical and sagittal morphology of the mandible. Methods A group of adult female patients with temporomandibular disorders were selected in the Department of Temporomandibular joint at West China Stomatological Hospital, Sichuan University. They were classified into normal position, disc displacement with reduction (DDwR), and disc displacement without reduction (DDwoR). The total number of patients included in this study was 223. The morphology of the disc was classified into normal and abnormal groups. Vertical (mandibular plane angle, Y-axis angle, ramus height) and sagittal (SNB, mandibular body length, saddle angle) morphological indicators of the mandible were measured on the lateral cephalometric radiographs. The correlation between the indicators and the morphology and position of the disc was compared. Results It showed that there was a correlation between the position and morphology of the disc and mandibular plane angle, Y-axis angle and ramus height (P<0.05), a correlation between the position of the left disc and SNB (P<0.05), and a correlation between the morphology of the bilateral disc and SNB (P<0.05). Conclusion There is a correlation between the morphology and position of the disc and the vertical and sagittal mandibular morphology, with a closer correlation with the vertical shape.

Key words: temporomandibular disorders, magnetic resonance imaging, cephalometry, disc position, mandibular morphology

CLC Number: