Abstract
Temporomandibular joint (TMJ) disk perforation or adhesion requires arthrographic examination. However, puncture of the TMJ may result in damaging penetration of the middle cranial fossa. We investigated the effectiveness of penetrating the superior TMJ space using a safe image-guided puncture technique (IGPT). Fifty-two patients underwent cone beam computed tomography (CBCT) examination. Optimum angles and distances from the puncture site to the thinnest point of the glenoid fossa to penetrate the superior joint space were measured using three-directional images. Puncturing the superior articular cavity was immediately successful in 50 cases. Image measurements gave an average horizontal angle of 8.0 degrees (standard deviation [SD]: 9.2), an average coronal angle of 16 degrees (SD: 11.3), and an average distance of 27 mm (SD: 2.8). Variation in puncture angle among individuals indicated that CBCT examination is necessary preceding TMJ puncture. Preliminary clinical application has demonstrated the safety of IGPT using CBCT.
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