Functional adaptation of the masticatory system to implant-supported mandibular overdentures
Functional adaptation of the masticatory system to implant-supported mandibular overdentures
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DOI：
10.1111/clr.12830
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发表时间：
2017-05-01
影响因子：
4.3
通讯作者：
Eberhard, Lydia
中科院分区：
文献类型：
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作者：
Giannakopoulos, Nikolaos Nikitas;Corteville, Frederic;Eberhard, Lydia
本研究的目的是探讨两种种植体支持下颌覆盖义齿即刻加载（术后24 ~ 72 h）后口颌系统的适应行为，并在安装时和3个月后进行评估。研究假设是，插入的覆盖义齿将显着改变咀嚼性能和肌肉活动在both times.Material和methodsThirty主题（9名女性，平均年龄69.6411.81岁; 21名男性，平均年龄68.677.41岁）谁参加了一项随机临床试验被列入研究。每名患者接受三次检查：（i）在基线时，已经佩戴新义齿三个月后（T1）;（ii）在种植体上插入覆盖义齿后立即（T2）;（iii）三个月的适应期后（T3）。检查包括使用人工测试食物（Optocal）评估咀嚼性能，以及同时记录咬肌和颞肌前肌的双侧表面EMG。通过使用重复测量方差分析（ANOVA）来比较粒度分布（代表值X-50）、最大肌肉收缩（MVC）和总肌肉工作（TMW;曲线下面积）。咀嚼性能和肌肉活性）与T1时的那些显著不同。在T2时，未观察到显著变化。结论下颌覆盖义齿即刻加载后，两种种植体的咀嚼功能和咀嚼肌活动不会立即恢复，但需要一定的时间才能恢复。
ObjectivesThe purpose of this study was to investigate the adaptation behavior of the stomatognathic system after immediate loading (24 to 72h after surgery) of two implants supporting mandibular overdentures, assessed on insertion and three months later. The study hypothesis was that insertion of the overdentures would significantly change masticatory performance and muscle activity at both times.Material and methodsThirty subjects (nine female, mean age 69.6411.81years; 21 male, mean age 68.677.41years) who participated in a randomized clinical trial were included in the study. Each patient was examined three times: (i) at baseline, after already having worn new dentures for three months (T1); (ii) immediately after insertion of the overdentures on the implants (T2); and (iii) after an adaptation period of three months (T3). Examination comprised assessment of masticatory performance with artificial test food (Optocal), and simultaneous bilateral surface EMG recording of the masseter and anterior temporalis muscles. Particle-size distribution (representative value X-50), maximum muscle contraction (MVC), and total muscle work (TMW; area under the curve) were compared by use of repeated-measures analysis of variance (ANOVA).ResultsAt T3, all measured variables (i.e., masticatory performance and muscle activity) were significantly different from those at T1. At T2, no significant changes were observed. The study hypothesis had to be rejected for T2 but accepted for T3.ConclusionFunctional rehabilitation (in terms of masticatory performance and masticatory muscle activity) does not occur immediately after immediate loading of two implants with mandibular overdentures, but requires a significant time for functional improvement.