Simple instrument for auscultation of temporomandibular joint sounds

Abstract

This article describes the fabrication of a simple instrument for auscultation of temporomandibular joint (TMJ) sounds from a stethoscope and saliva ejector. Joint sound is one of the characteristic features of TMJ disorders for many patients. Physical examination of the TMJ often involves light finger palpation and stethoscope auscultation as needed. However, the reliability of stethoscope auscultation for TMJ sounds has been questioned. 1. Baba K. Tsukiyama Y. Yamazaki M. Clark G.T. A review of temporomandibular disorder diagnostic techniques. J Prosthet Dent. 2001; 86: 184-194 Abstract Full Text Full Text PDF PubMed Scopus (38) Google Scholar The external auditory meatus (EAM) is the closest anatomically approachable structure to the TMJ, and the auditory canal has been shown to be more sensitive than the surface of the skin when evaluating joint sounds. 2. Hardison J.D. Okeson J.P. Comparison of three clinical techniques for evaluating joint sounds. Cranio. 1990; 8: 307-311 PubMed Google Scholar Fabrication of this simple instrument allows the end of a soft, disposable, sterile tip for auscultation of TMJ sounds in the EAM.