International Journal of Medical Sciences

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22 April 2019

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Int J Med Sci 2018; 15(2):161-169. doi:10.7150/ijms.21665

Research Paper

Assessment of the Temporomandibular Joint Function in Young Adults without Complaints from the Masticatory System

Wojciech Kondrat1, Teresa Sierpińska1✉, John Radke2

1. Department of Prosthetic Dentistry , Medical University of Białystok, M. Skłodowskiej-Curie 24A, 15-276 Białystok;
2. Bioresearch Associates (JVA, Bioresearch Assoc., Milwaukee, WI, USA).


Objective of the study was to evaluate the clinical status of the masticatory system in young adults with full permanent dentition and no stomatognathic system complaints. The study involved 186 randomly selected people with full dental arches with normal occlusal conditions corresponding to Angle's Class I aged 18 - 21 years with an average age of 19 years. Subjects were clinically examined and temporomandibular joint (TMJ) vibrations were recorded during open-wide and close movements using BioJVA. Then, patients were categorized into groups according to Piper's classification system. The TMJs of the subjects were categorized according to the values of the vibration energy and the Piper protocol. This detected 33.4% of the joints with loosened ligaments, subluxation in 8.28%, initial signs of disc dysfunction in 5.08% and disc displacement without locking in 1.6 %. Median frequency differed significantly (p < 0.05) between the group of subjects with initial signs of TMJ dysfunction and other groups. Peak Frequency differed significantly (p < 0.05) between the healthy joints and those with TMJ subluxation. In this group of young healthy people, the majority of study joints generated small vibrations. However, a subset of people manifested higher vibrations that may indicate an early stage of TMJ dysfunction. Median Frequency was an important parameter for detecting initial symptoms of TMJ dysfunction. Peak Frequency was an important characteristic parameter for detecting TMJ subluxation.

Keywords: masticatory system, joint vibration analysis, TMJ diagnostics.

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) license ( See for full terms and conditions.
How to cite this article:
Kondrat W, Sierpińska T, Radke J. Assessment of the Temporomandibular Joint Function in Young Adults without Complaints from the Masticatory System. Int J Med Sci 2018; 15(2):161-169. doi:10.7150/ijms.21665. Available from