Objective: To learn the changes of TMJ disc positions under the influences of TMJ Osteoarthrosis(TMJOA).
Methods: The TMJOA experimental animal model was established by 12 goats. The TMJ disc positions were observed and recorded at different intervals, (1 month, 2 months, 3 months, 4 months and 6 months) then the pathological changes of TMJ specimens were also studied.
Results: Significant anteromedial shift of TMJ disc position was observed in some certain TMJOA phases and became more obviously along with the disease progress.
Conclusion: The shift of TMJ disc may be the secondary change of TMJOA.