3944
Real-time tyGA Imaging for diagnosis and treatment evaluation of articular disc displacements in the TMJ
Kilian Stumpf1, Mariam Seyfang2, Bernd Georg Lapatki2, and Volker Rasche1
1Department of Internal Medicine II, Ulm University Medical Center, Ulm, Germany, 2Department of Orthodontics, Ulm University Medical Center, Ulm, Germany
A real-time radial tiny golden angle sequence is applied for imaging of the temporomandibular joint. Its use for visualizing anterior disc displacements and assisting in diagnosis and treatment planning and evaluation is demonstrated.
Figure 2: When starting the movement from a protrusive mandibular position, the sliding window reconstruction with a frame rate of 125 ms allowed the visualization of the repositioning of the condyle (dotted arrow) on the articular disc (solid arrow) (B-E) with subsequent full opening of the mandible (G). During the closing motion the condyle can once again be observed to slip down from the articular disc (J-L).
Figure 3: Visualization of the jaw motion with an incorporated occlusal splint. Starting in a therapeutic, more anterior and caudal initial position with the condyle (dotted arrow) already positioned on the articular disc (solid arrow), no additional repositioning or disc displacement was observed during the entire motion of the jaw.