Duncan R C, Storey A T, Rugh J D, Parel S M
Department of Prosthodontics, Ehrling Bergquist Strategic Hospital, Offutt Air Force Base, Neb.
J Prosthet Dent. 1992 Apr;67(4):544-9. doi: 10.1016/0022-3913(92)90088-r.
The control of postural and synergistic jaw reflexes involves interrelated sensory input from receptors in the jaw muscles, temporomandibular joint, periodontal ligament, and mucosa. This investigation was done to determine whether a decrease in intraoral sensory afferent discharge significantly altered the onset of the jaw-unloading reflex. The subject population consisted of three groups with 10 subjects in each group. Group 1 had maxillary and mandibular natural teeth and group 2 consisted of edentulous subjects with complete dentures. Group 3 consisted of edentulous subjects with maxillary complete dentures and mandibular complete implant-supported prostheses. The unloading reflex was initiated with a muscle-unloading device and recorded with a storage oscilloscope. A one-way analysis of variance found no significant differences in the unloading-reflex latency for the masseter or temporal muscles among the three experimental groups (p less than 0.05).
姿势和协同性下颌反射的控制涉及来自咬肌、颞下颌关节、牙周韧带和黏膜中感受器的相互关联的感觉输入。进行这项研究是为了确定口腔内感觉传入放电的减少是否会显著改变下颌卸载反射的起始。受试者群体由三组组成，每组10名受试者。第1组有上颌和下颌天然牙，第2组由佩戴全口义齿的无牙受试者组成。第3组由佩戴上颌全口义齿和下颌种植支持全口义齿的无牙受试者组成。使用肌肉卸载装置启动卸载反射，并通过存储示波器进行记录。单因素方差分析发现，三个实验组咬肌或颞肌的卸载反射潜伏期没有显著差异（p小于0.05）。
