[Relationships between MRI image changes of lateral pterygoid muscle, disc position and condylar mobility in Class II patients].

Objective: To analyze the relationships between MRI image changes of lateral pterygoid muscle (LPM), disc position and condylar mobility.

Methods: Twenty Class II patients were chosen and MRI images of LPM were taken. The relationships between MRI image changes of LPM, disc position and condylar mobility were analyzed.

Results: The rate of MRI image changes of LPM in Class II patients was about 45%. No significant correlations were found between MRI image changes of LPM, condylar mobility and disc position.

Conclusions: MRI image changes of LPM in Class II patients was common but no significant correlations were found between MRI image changes of LPM, condylar mobility and disc position.