JT-3D system을 이용한 하악의 운동 분석
Analysis on mandibular movement using the JT-3D system
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목적: JT-3D system를 통해 하악의 운동을 측정하고 측두 하악 장애의 진단에 참고할 수 있는 하악의 운동 범위를 제공하고자 하였다. 연구 재료 및 방법: 성인 60명을 대상으로 JT-3D system을 이용하여 최대 개구와 폐구 운동을 기록하였고, 5회의 반복 운동을 1번의 운동 주기로 간주하여 총 3회의 운동 주기를 기록하였다. 최대 개구 시 하악의 수직적 위치, 전후방 위치, 측방 편위량, 최대 개구량을 기록하였다. JT-3D system의 재현성 평가를 위해 통계분석을 시행하였다(α = 0.05). 결과: 최대 개구 시의 평균값은 수직적 위치 31.56 mm, 후방 24.42 mm, 측방 편위량 0.72 mm, 최대 개구량 40.32 mm로 나타났다. JT-3D system으로 기록한 3회의 운동 주기의 모든 측정값에서 통계적 유의성은 없었다(P > 0.05). 결론: 최대 개구 시 평균 측방 편위량에서 0.72 mm, 최대 개구량은 40.32 mm로 나타났으며, JT-3D system을 이용한 하악 운동 분석은 재현성 있는 결과를 보였다.
Abstract
Purpose: This study aims to measure the mandibular movement using JT-3D system and provide a range of mandibular movement that can serve as a good reference for diagnosing the temporomandibular disorder. Materials and Methods: This study was conducted in 60 young male and female adults. The maximum opening and closing movement was recorded using JT-3D system, and by regarding 5 times of repetitive movement as 1 cycle of movement, total 3 cycles of movement were recorded. During the maximum opening, vertical position of lower jaw, antero-posterior position, lateral deflection position, and maximum opening distance were recorded. To evaluate the reproducibility of JT-3D system, statistical analysis were conducted (α = 0.05). Results: During the maximum opening, the average value appeared at 31.56 mm vertically and 24.42 mm rearwardly, lateral deflection position 0.72 mm, and maximum opening distance 40.32 mm. There was no statistical significance in all measured values for three cycles of movement recorded with JT-3D system (P > 0.05). Conclusion: During the maximum opening, the average value appeared at 0.72 mm in lateral deflection position and the maximum opening distance at 40.32 mm, and the analysis on the maximum opening of lower jaw using JT-3D system showed sufficiently reproducible results. (J Dent Rehabil Appl Sci 2020;36(2):80-7)
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