Abstract
The temporomandibular joint (TMJ) is a bilateral synovial articulation stabilized by several anatomical structures such as ligaments. The existence of articular capsule reinforcement structures have been described in the lateral and medial sides of disc which have been defined as collateral ligaments, lateral and medial. Despite that, some macroscopic observations support that these collateral ligaments do not belong to the articular capsule but they belong to the disc. By that, the aim of the present work was to evaluate morphological aspects of TMJ from cadaveric frozen heads by histological and immunofluorescence techniques in order to verify the origin and insertion of lateral and medial collateral ligaments. Results show that both lateral and medial ligaments origin from the disc and insert directly to the articular cartilage of mandibula condyle. These data open a new approach in the study of human TMJ.
Highlights
The temporomandibular joint (TMJ) is a bilateral synovial articulation between condylar process of the mandibular ramus [1] and the mandibular fossa of the temporal bone. This joint it is made up of thin fibro-cartilage articular disc, interposed between the articular items, and of a loose joint capsule that surrounds the lateral sides of the joint [2,3,4]
There are two ligaments originating from the articular capsule that would play the role of lateral stabilization of the disc to the bone surface: these connective structures are named collateral lateral and collateral medial ligaments [2,19,20]
The existence of both collateral ligaments is controversial since the data present in the literature are discordant
Summary
The temporomandibular joint (TMJ) is a bilateral synovial articulation between condylar process of the mandibular ramus [1] and the mandibular fossa of the temporal bone. This joint it is made up of thin fibro-cartilage articular disc, interposed between the articular items, and of a loose joint capsule that surrounds the lateral sides of the joint [2,3,4]. The anterior portion of the articular disc attaches superiorly to the articular eminence by bending with the joint capsule and inferiorly to the anterior condyle and the upper area of the lateral pterygoid muscle. The disc attaches superiorly to the temporal bone and inferiorly to the posterior condyle
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