MR of 732 TMJs: anterior, rotational, partial and sideways disc displacements.

Objective: The purpose of this study was to determine the prevalence of anterior, sideways, rotational and partial anterior disc displacements, as well as degenerative changes in patients with clinical signs and symptoms of internal disorders.

Materials And Methods: 732 MR Images of temporomandibular joints (TMJ) were produced for 366 symptomatic patients. Image analysis included assessment of disc positions and mobility, as well as recapture in coronal and mediolaterally divided sagittal planes in closed and open positions.

Clinical diagnosis compared with findings of magnetic resonance imaging in 242 patients with internal derangement of the TMJ.

The aim of this study was to compare the provisional diagnosis based on an initial clinical examination with subsequent findings of magnetic resonance imaging in patients with internal derangement of the temporomandibular joint. Clinical examinations were conducted on 242 patients (198 women and 44 men) who had unilateral (51%) or bilateral (49%) temporomandibular joint internal derangement. They were divided into the following categories: (1) disc displacement with reduction; (2) disc displacement without reduction; (3) "stuck" disc; (4) degenerative arthrosis with or without one of the above; and (5) normal temporomandibular joint of the contralateral side.

Disc movements over the condylar head. Radiographical study on autopsy materials.

A radiographical study has been performed to evaluate the movement of the disc posterior band over the condylar head during mandibular opening. Six formal free embalmed subjects were selected as 'normal'. Micro stainless steel balls were used as landmarks both into the bone and into the disc for X-ray identification.

Anatomy of the temporomandibular joint and related structures in the frontal plane.

Conclusions about the anatomy and physiology of the temporomandibular joint have too often been based on sagittal representations. The aim of the article is to describe frontal serial cuts of an acrylic embedded articulation of a subject with teeth in intercuspal position. The frontal plane is best to visualise the difference between lateral and medial aspects of structures such as the disk-condyle-complex, the articular capsule, and related muscles.

Temporomandibular joint serial sections made with mandible in intercuspal position.

This article presents a method for preparing block sections of the human temporomandibular joint. The purpose of the study was to examine the relationship of the temporomandibular joint components without disturbing the anatomic arrangement of the parts. The mandibles of seven fresh cadavers were locked into a specific occlusal position (intercuspal) throughout all procedures.