Effect of High-frequency Ultrasound Detection on Treatment of Temporomandibular Joint Disorders using Repositioning Splint
Objective:To investigate the effect of repositioning splint on temporomandibular disorders(TMD)by measuring the cross-sectional area of bilateral masseter muscles and the width of joint capsule by high-frequency ul-trasound.Methods:Twenty-three patients with temporomandibular joint pain and joint play sound visited our de-partment were randomly selected as the experimental group,and 20 healthy volunteers as control group.Experi-mental group was received positioning grind splint treatment.The thickness of bilateral masseter muscle and the width of joint capsule were measured by high-frequency ultrasound before treatment and 1,2,and 3 months after treatment,and compared with the control group.The changes of symptoms before and after treatment in the exper-imental group were recorded.Results:In the experimental group,the average thickness of bilateral masseter muscle was 9.42 mm in the non-occlusal state and 13.04 mm in occlusal state before treatment.In the control group,the average thickness of bilateral masseter muscle was 8.48 mm in the non-occlusal state and 10.27 mm in occlusal state.There was statistical significance between two groups before treatment(P＜0.001).Additional,the masse-ter muscle thickness had significant difference each month after treatment in the experimental group(P＜0.001).The joint capsule width in the jaw plate had no statistically significant difference between two groups before treat-ment(P＞0.05).After treatment,the symptoms of pain and ringing were significantly improved,and the cure rate was 52.2％.Conclusion:The effect occlusal plate is significant.High-frequency ultrasound can be used as an effec-tive tool to evaluate the treatment effect of occlusal plate,providing a basis for clinical diagnosis and evaluation of the clinical effect of TMJ disorders.
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