Comparative Study of VDR and the Electrical Activity of the Anterior Temporal and Masseter Muscles using Physiologic rest Position, Phonetics and Swallowing methods
Shirin Lavaf* and Arash Azizi Meysam PakravanSchool of Dentistry, Ahvaz Jundishapur University of medical sciences, Ahvaz, Iran.
Abstract: Vertical dimension of rest (VDR) or physiologic rest position (VDR) is defined as a stage of prosthetic treatment for edentulous patients. Mandibular rest position is used to record VDR which is fulfilled via common methods such as Physiologic rest position, Phonetics and Swallowing methods. This study aims to compare the rate of VDR and electrical activity of the anterior temporal and masseter muscles using physiologic rest position, phonetics and swallowing methods. This is a clinical trial conducted in the Rehabilitation faculty of Ahvaz Jundishapur University of Medical Sciences during 2009-2010. The statistical population consists of 30 individuals (15 men and15 women; age range 18-30 years old). The conditions for inclusion to this study is having 28 natural teeth with the Class I (Class I molar relationship), normal range of overjet and overbite, without anterior and posterior crossbites. Mean of VDR was recorded after swallowing (7/48+0.012), phonetics (8.14 0.19) and physiologic rest position (8.22 0.19). Mean of voltage of anterior temporal muscles was recorded after swallowing (7/360.216), phonetics (6.19 0.095) and physiologic rest position (6.19 0.119). it can use all the mentioned methods to acquire precise distance for VDR in clinic and it can use mean of acquired sizes under any difference.
Keywords: VDR; Electromyography; phonetic voltage Back to TOC