Timing and character of reciprocal temporomandibular joint sounds in an asymptomatic orthodontic sample.
Remington Kj, Cyril Sadowsky, Zane F. Muhl, Begole Ea · PubMed · 1990
The timing and character of opening and closing temporomandibular joint sounds were evaluated in a sample of 33 asymptomatic subjects with reciprocal clicking. Using stereophonic headphones and videotape recordings, three consecutive reciprocal sounds were recorded and analyzed. The timing of the three consecutive opening and closing sounds was consistent in the majority of subjects, and occurred generally on late opening and middle to late closing. When the timing, character (frequency, amplitude, and duration), and wave patterns were evaluated, a notable amount of variation was observed in the overall sample. This suggested a variety of intra-articular reasons for the reciprocal sounds in this particular sample of subjects.