Osawa Gutierrez Luiz Makito, Quatrin Melissa Coradini, Sforza Chiarella, Baptista Rafael Reimann, Santayana de Lima Eduardo Martinelli
Post-Graduate Program in Dentistry, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, RS, Brazil.
Human Anatomy, Medical School, Università degli Studi di Milano, Milan, Italy.
Int J Dent. 2022 Mar 12;2022:4552674. doi: 10.1155/2022/4552674. eCollection 2022.
There is evidence that patients with posterior crossbite (PXB) have neuromuscular changes in the masticatory muscles. However, up to the present time, the relationship among these changes on the electromyographic activity of the masticatory muscles is still unclear.
To systematic review the available literature on the electromyographic activity of masticatory muscles in adults with PXB.
Between August 22 and September 9, 2020, we searched the following seven electronic databases: PubMed, EMBASE, Web of Science, Cochrane Library, SciELO, LILACS, and Scopus. No restrictions were applied regarding the language and year of publication. This systematic review was registered in the Prospective Register of Systematic Reviews (PROSPERO - CRD42020205057) database and conducted using the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. After data selection and extraction, the methodological quality of the selected studies was conducted independently by two reviewers, using two different evaluation tools.
6957 records were initially located after the search process. In the end, eight papers were selected. Most studies were classified as having average to low methodological quality and moderate to high risk of bias. Based on the available evidence, adult patients with PXB have electromyographic activity changes in the masticatory muscles when compared with individuals without PXB. Moreover, adult patients with unilateral posterior crossbite (UPXB) have asymmetrical electromyographic activity when the crossbite side is compared with the noncrossbite side.
Despite the lack of studies with high methodological quality, electromyographic evaluation of masticatory muscles should be considered in the diagnosis and in the orthodontic treatment plan of patients with PXB. Prospective studies with a higher sample size and follow-up time, conducted using a rigorous scientific methodology, are necessary to reach a more reliable conclusion.
有证据表明，患有后牙反合（PXB）的患者咀嚼肌存在神经肌肉变化。然而，截至目前，这些变化与咀嚼肌肌电活动之间的关系仍不清楚。
系统评价关于成年PXB患者咀嚼肌肌电活动的现有文献。
2020年8月22日至9月9日，我们检索了以下七个电子数据库：PubMed、EMBASE、科学网、考克兰图书馆、SciELO、LILACS和Scopus。对出版语言和年份未作限制。本系统评价在系统评价前瞻性注册库（PROSPERO - CRD42020205057）数据库中注册，并按照系统评价和Meta分析的首选报告项目（PRISMA）指南进行。在数据筛选和提取后，由两名评价者使用两种不同的评价工具独立对所选研究的方法学质量进行评价。
检索过程最初共找到6957条记录。最终，入选了八篇论文。大多数研究的方法学质量被归类为中等至低质量，偏倚风险为中等至高风险。根据现有证据，与无PXB的个体相比，成年PXB患者咀嚼肌的肌电活动有变化。此外，单侧后牙反合（UPXB）的成年患者，反合侧与非反合侧相比，肌电活动不对称。
尽管缺乏高质量的方法学研究，但在PXB患者的诊断和正畸治疗计划中，应考虑对咀嚼肌进行肌电评估。有必要采用严格的科学方法进行样本量更大、随访时间更长的前瞻性研究，以得出更可靠的结论。
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