PDF(Pubmed)
Abstract：
OBJECTIVE: Total tooth loss is common in the aging population resulting in insufficient chewing function with subsequent weakening of the masticatory muscles. The study aims to evaluate the changes in thicknesses of the masseter and anterior temporal muscle in edentulous patients following the reconstruction of implant-supported fixed prostheses and compare them with the dentate individuals.
METHODS: The study was designed as a prospective, single-center, controlled clinical trial. A total of 60 participants were included in the present study. The patients were divided into two groups; Group I (Test Group): 30 edentulous patients who received implant-supported fixed prostheses, Group II (Control Group): 30 dentate individuals of an age and sex-matched group. Ultrasonography was used to measure the cross-sectional thickness of the left and right musculus masseter and anterior temporalis immediately after the cementation of the prosthetic rehabilitation (T1), on the 1st (T2) and 6th (T3) months after rehabilitation and at a single time point in the control group.
RESULTS: The results showed that there were significant comparison differences in muscle thickness at the baseline measurements between groups while at the end of the 6th month, these differences were not significant. The muscle thicknesses of both the masseter and anterior temporalis muscles increased significantly at T2 and T3 compared to T1 in the test group. The asymmetry index between the left and right muscles in the test group and the asymmetry differences between groups also decreased significantly at the end of the 6th month.
CONCLUSIONS: The implant-supported fixed prostheses significantly increase the thicknesses of the masseter and anterior temporal muscle together with a decrease in the asymmetry between the left and right muscles. At six months, implant-treated patients showed similar muscle thicknesses compared to dentate individuals.
CONCLUSIONS: The findings suggest that implant-supported fixed prostheses can improve the masticatory function and facial symmetry of edentulous patients.
METHODS: The study was designed as a prospective, single-center, controlled clinical trial. A total of 60 participants were included in the present study. The patients were divided into two groups; Group I (Test Group): 30 edentulous patients who received implant-supported fixed prostheses, Group II (Control Group): 30 dentate individuals of an age and sex-matched group. Ultrasonography was used to measure the cross-sectional thickness of the left and right musculus masseter and anterior temporalis immediately after the cementation of the prosthetic rehabilitation (T1), on the 1st (T2) and 6th (T3) months after rehabilitation and at a single time point in the control group.
RESULTS: The results showed that there were significant comparison differences in muscle thickness at the baseline measurements between groups while at the end of the 6th month, these differences were not significant. The muscle thicknesses of both the masseter and anterior temporalis muscles increased significantly at T2 and T3 compared to T1 in the test group. The asymmetry index between the left and right muscles in the test group and the asymmetry differences between groups also decreased significantly at the end of the 6th month.
CONCLUSIONS: The implant-supported fixed prostheses significantly increase the thicknesses of the masseter and anterior temporal muscle together with a decrease in the asymmetry between the left and right muscles. At six months, implant-treated patients showed similar muscle thicknesses compared to dentate individuals.
CONCLUSIONS: The findings suggest that implant-supported fixed prostheses can improve the masticatory function and facial symmetry of edentulous patients.
摘要：
目的：在老年人群中，牙齿完全脱落是常见的，导致咀嚼功能不足，随后咀嚼肌减弱。该研究旨在评估无牙患者在重建植入物支撑的固定假体后咬肌和颞前肌厚度的变化，并将其与齿状个体进行比较。
方法：本研究设计为前瞻性，单中心,对照临床试验。本研究共纳入60名参与者。将患者分为两组；第一组（测试组）：30例接受植入物支撑固定假体的无牙患者，II组(对照组):年龄和性别匹配组的30个齿状个体。超声检查用于在假体康复（T1）的骨水泥化后立即测量左右肌咬肌和前颞肌的横截面厚度，在康复后的第1（T2）和第6（T3）个月以及对照组的单个时间点。
结果：结果表明，在第6个月结束时，各组之间的基线测量值的肌肉厚度存在显着比较差异，这些差异并不显著。与测试组的T1相比，在T2和T3时，咬肌和颞前肌的肌肉厚度均显着增加。试验组左右肌肉之间的不对称指数和组间的不对称差异在第6个月末也显著下降。
结论：植入物支持的固定假体显着增加了咬肌和颞前肌的厚度，同时减少了左右肌之间的不对称性。六个月的时候，与齿状个体相比，植入物治疗的患者显示出相似的肌肉厚度。
结论：研究结果表明，种植体支持的固定假体可以改善无牙颌患者的咀嚼功能和面部对称性。
方法：本研究设计为前瞻性，单中心,对照临床试验。本研究共纳入60名参与者。将患者分为两组；第一组（测试组）：30例接受植入物支撑固定假体的无牙患者，II组(对照组):年龄和性别匹配组的30个齿状个体。超声检查用于在假体康复（T1）的骨水泥化后立即测量左右肌咬肌和前颞肌的横截面厚度，在康复后的第1（T2）和第6（T3）个月以及对照组的单个时间点。
结果：结果表明，在第6个月结束时，各组之间的基线测量值的肌肉厚度存在显着比较差异，这些差异并不显著。与测试组的T1相比，在T2和T3时，咬肌和颞前肌的肌肉厚度均显着增加。试验组左右肌肉之间的不对称指数和组间的不对称差异在第6个月末也显著下降。
结论：植入物支持的固定假体显着增加了咬肌和颞前肌的厚度，同时减少了左右肌之间的不对称性。六个月的时候，与齿状个体相比，植入物治疗的患者显示出相似的肌肉厚度。
结论：研究结果表明，种植体支持的固定假体可以改善无牙颌患者的咀嚼功能和面部对称性。
