Purpose : To evaluate the condylar movement at maximal mouth opening on MRI in patients with internal derangement.
Materials and Methods : MR images and transcranial views for 102 TMJs in 51 patients were taken in closed and maximal opening positions...
Purpose : To evaluate the condylar movement at maximal mouth opening on MRI in patients with internal derangement.
Materials and Methods : MR images and transcranial views for 102 TMJs in 51 patients were taken in closed and maximal opening positions, and the amount of condylar movement was analyzed quantitatively and qualitatively.
Results : For MR images, the mean condylar movements were 9.4 ㎜ horizontally, 4.6 ㎜ vertically and 10.9 ㎜ totally, while those for transcranial views were 12.5 ㎜, 4.6 ㎜, and 13.7 ㎜ respectively. The condyle moved forward beyond the summit of the articular eminence in 41 TMJs (40.2%) for MR images and 56 TMJs (54.9%) for transcranial views.
Conclusion : The horizontal and total condylar movements were smaller in MR images than in transcranial views. (Korean J Oral Maxillofac Radiol 2001; 31 : 185-92)