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Temporomandibular joint motion: efficacy of fast low-angle shot MR imaging.
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1989
Year
Temporomandibular Joint MotionSurgeryOrthopaedic SurgeryOsteoarthritisTemporomandibular Joint PainMaxillofacial SurgeryRadiologyHealth SciencesMedical ImagingMusculoskeletal ImagingTemporomandibular JointTemporomandibular Joint DysfunctionOrthognathic SurgeryTemporomandibular Joint FunctionFlash SequencesOcclusionTemporal BoneDisk RecaptureTmj MotionTmj DisorderMedicine
One hundred temporomandibular joints (TMJs) in 62 symptomatic patients and two healthy volunteers were prospectively examined with T1-weighted spin-echo and fast low-angle shot (FLASH) gradient-echo sequences. FLASH sequences were performed during opening of the mouth and provided a pseudodynamic depiction of TMJ motion. In 49 joints, FLASH sequences provided information that potentially influenced the therapeutic approach to the patient. This information was not available from standard T1-weighted images. The additional information fell into four general categories: (a) determination of the exact time of disk recapture, (b) distinction of normal variants from pathologically displaced disks, (c) clarification of discrepancies found between clinical examination results and T1-weighted images, and (d) elimination of motion degradation of images.