The aim of this study was to register and measure lower jaw movements, to analyse
the measured length of opening and closing movements and to analyse the rotational
mandibular capacity during the maximal opening of the mouth in the position of centric
relation. Our objective was to determine the average values for each mandible and temporomandibular
joint movement, as well as to determine the accuracy of electronic axiography,
while diagnosing temporomandibular joint disorders. A statistical analysis
was performed in order to evaluate whether significant differences between the length of
the measured movements in asymptomatic and symptomatic subjects could be found. A
symptomatic group consisted of 51 subjects with temporomandibular disorders. A control
group consisted of 43 subjects without signs and symptoms of temporomandibular
joint disorders. Each subject was registered by the GAMMA CADIAX system for registration
of position and movement of the lower jaw, which consists of a conventional
SAM axiograph, an electronic device for drawing curves by means of a computer. No significant
differences were found between the groups of subjects for the measured variables.
The results of the length of the mandibular and condyle movements, along with
the rotational capacity of the mandible are important, in spite of unreliable indicators
of temporomandibular joint function. Description analysis of a graphic recording of
mandibular and TMJ movement remains an accurate evaluation method for the determination
of TMJ dysfunction
