[Quantitative evaluation of repositioning of the mandible in TM disorders by impedance audiometry]

The following findings have been obtained as a result of investigating the patients with TM disorder before and after correction of the mandibular repositioning as it was considered that, if the sound transmitting middle ear hearing system which undergoes change along with the morbidity in progress shows reversible changing aspect in response to the ebb and flow of the morbidity, it would serve as quantitative diagnostic criteria regarding the repositioning by means of bite-plane therapy. Changes were observed between before and after repositioning in 3 item measurement. The values of static compliance, impedance and pressure of middle ear were reduced to the level of those in healthy subjects. Consequently, the following conclusions were reached: Impedance audiometry serves as quantitative judging criteria regarding the repositioning of the mandible by means of bite-plane therapy.