Temporomandibular Disk Disk Displacement Partial disk displacements Unidirectional Disk Displacement Anterior & posterior disk displacements Medial and lateral displacements Partial anterior disc displacement Complete anterior disc displacement Thickening of an LPM Attachment Osteoarthritis Arthritis Joint effusion Disk Deformity Retrodiskal Layer Rupture condylar process fractures Inflammed TMJ in rheumatoid arthritis