Private Practice, Stuttgart, Germany.
Department of Prosthodontics and Biomaterials, Center for Implantology, Medical Faculty, University Hospital, RWTH Aachen University, Aachen, Germany.
Clin Oral Implants Res. 2017 Jul;28(7):765-773. doi: 10.1111/clr.12874. Epub 2016 Jun 14.
The goal of this meta-analysis was to evaluate how muscular activity, measured by electromyography (EMG), differs among edentulous patients treated with a complete denture (CD), removable implant overdentures (IO), implant-retained fixed dental prostheses (IFDP), and dentates. The differences during clenching and chewing were of particular interest.
An electronic literature review was carried out on MEDLINE (Pubmed) and the Cochrane Library covering the period January 1980 through September 2013. This was accomplished independently by three different reviewers and supplemented by a manual search. The review included randomized controlled trials, controlled clinical trials, and clinical trials which evaluated surface electromyography, bite force, chewing, and implants or complete dentures. In addition, the research was adjusted using MeSH terms.
The search garnered 646 titles and abstracts. Sixteen articles which met the inclusion criteria were analyzed. The effect size for muscular activity after implant support increased after therapy during clenching 2.18 (95% CI: 1.14, 3.23) and during chewing 1.45 (95%CI: 1.21, 1.69). Moreover, the EMG data of IO and IFDP groups (pooled) were lower than that of dentate control subjects during clenching (effect size: -1.01 [95%CI: -1.37, -0.65]). In contrast, the IFDP-wearers showed higher values than dentates during chewing. Among the edentulous control patients, the IO and IFDP groups (pooled) displayed higher values during clenching (effect size: 1.12 [95%CI: 0.7, 1.55]) and chewing (effect size: 1.33 [95%CI: -0.57, 2.10]). Furthermore, the muscular activity during chewing correlated with the hardness of the food.
In general, edentulous patients with CDs can achieve a greater degree of muscular activity after rehabilitation with IOs during clenching and chewing. During clenching, patients with IFDPs achieved higher values than those with dentates. The muscular activity increases with the hardness of the food.
本荟萃分析旨在评估通过肌电图（EMG）测量的无牙患者在佩戴全口义齿（CD）、可摘式种植覆盖义齿（IO）、种植体固位固定义齿（IFDP）和有牙颌患者之间的肌肉活动有何不同。特别关注咬牙和咀嚼时的差异。
通过电子文献检索 MEDLINE（Pubmed）和 Cochrane 图书馆，检索时间从 1980 年 1 月至 2013 年 9 月。该检索由三位不同的审查员独立进行，并通过手动搜索进行补充。综述包括评估表面肌电图、咬合力、咀嚼和种植体或全口义齿的随机对照试验、对照临床试验和临床试验。此外，还使用 MeSH 术语调整了研究。
搜索共获得 646 个标题和摘要。符合纳入标准的 16 篇文章进行了分析。在咬牙和咀嚼时，植入物支持后的肌肉活动增加，分别为 2.18（95%CI：1.14，3.23）和 1.45（95%CI：1.21，1.69）。此外，IO 和 IFDP 组（合并）的 EMG 数据在咬牙时低于有牙对照组（效应量：-1.01 [95%CI：-1.37，-0.65]）。相比之下，IFDP 佩戴者在咀嚼时的数值高于有牙者。在无牙对照组患者中，IO 和 IFDP 组（合并）在咬牙时显示出更高的数值（效应量：1.12 [95%CI：0.7，1.55]）和咀嚼时（效应量：1.33 [95%CI：-0.57，2.10]）。此外，咀嚼时的肌肉活动与食物的硬度相关。
总的来说，无牙患者佩戴 IO 后，在咬牙和咀嚼时肌肉活动程度可以得到更大程度的恢复。在咬牙时，IFDP 佩戴者的数值高于有牙者。肌肉活动随食物硬度增加而增加。
