Savabi Omid, Nejatidanesh Farahnaz, Khosravi Saeed
Department of Prosthodontics, School of Dentistry, Esfahan University of Medical Sciences, Esfahan, Israel.
Quintessence Int. 2007 Feb;38(2):e129-32.
Despite the broad use of occlusal splints in the treatment of temporomandibular disorders, the efficacy of splints is a source of controversy. In this study, the effectiveness of occlusal splints on the electromyographic activity of the masseter and temporal muscles in healthy individuals was investigated.
An occlusal splint was made for 25 healthy individuals. Surface electromyographic recordings were done during maximum clenching without the splint and immediately after application of the splint. The relative level of activity in the masseter and temporal muscles was quantified by means of activity index. Paired t test and Wilcoxon signed-rank tests were used for data analysis.
The mean electromyographic activities of masseter and temporal muscles (in mV/s) were 0.7712 and 1.0488 without the splint and 0.8396 and 0.9276 immediately after application of the splint. There was no significant difference between the electromyographic activities of both muscles before and after insertion of the splints. The activity index increased after application of the occlusal splints. This increase was also insignificant.
Immediate application of occlusal splints has no significant effect on the activity of masseter and temporal muscles. It could decrease the relative activity of the temporal to the masseter muscle (increasing the activity index).
尽管咬合板在颞下颌关节紊乱病的治疗中广泛应用，但咬合板的疗效仍存在争议。本研究调查了咬合板对健康个体咬肌和颞肌肌电活动的影响。
为25名健康个体制作咬合板。在不使用咬合板时最大紧咬期间以及佩戴咬合板后立即进行表面肌电记录。通过活动指数对咬肌和颞肌的相对活动水平进行量化。采用配对t检验和Wilcoxon符号秩检验进行数据分析。
不使用咬合板时咬肌和颞肌的平均肌电活动（单位：mV/s）分别为0.7712和1.0488，佩戴咬合板后立即分别为0.8396和0.9276。插入咬合板前后，两块肌肉的肌电活动均无显著差异。佩戴咬合板后活动指数增加，但这种增加也不显著。
立即佩戴咬合板对咬肌和颞肌的活动无显著影响。它可能会降低颞肌相对于咬肌的相对活动（增加活动指数）。
