균형측 접촉과 악관절 잡음에 관한 악관절 진동 분석

Abstract

Purpose : The purpose of this study was to investigate the effect of balancing side occlusal contacts on temporomandibular joints(TMJ) through sonography.

Materials and methods : In this study, 100 adults who had no symptom of temporomandibular disorder(TMD) such as pain or opening disorder but may have clicking sounds were investigated in this study. Subjects were checked for occlusal interferences with articulating paper, and the presence of clicking sounds with TMJ palpation and stethoscopy. And then, they were classified into four groups according to their status of occlusal interferences or clicking sounds for each category. The joint vibration of the subjects was recorded by using JVA (Joint Vibration Analysis, BioResearch Inc., Milwaukee, Wisconsin, USA). JVA indexes(Total integral, integral <300Hz, integral> 300Hz, peak amplitude peak frequency,> 300 / <300 ratio, med. -frequency) were measured and compared.

Results : All JVA indexes(Total integration, integral <300 Hz, integral> 300 Hz, peak amplitude peak frequency) showed no statistically significant difference between the groups. Only JVA index of > 300 / <300 ratio, med. showed a statistically significant difference in the group with both interference and clicking sound.

Conclusion : If there are balancing side interferences and clicking sounds at the same time, a larger > 300 / <300 ratio, med. frequency showed that the interferences and the TMJ clicking sounds were chronic and affected the TMJ vibration.