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15 Cards in this Set
- Front
- Back
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Hinge joint formed by the mandibular condyle (covered by dense fibrous CT) and the inferior disc surface
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Lower Joint of TMJ
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Gliding joint formed by the articular eminence (covered by fibrocartilage) and the superior disc surface
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Upper Joint of TMJ
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Thickest, innervated and vascularized, sits between condyle and mandibular fossa
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Posterior division of intra-articular disc
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thinnest, no innervation, weight bearing surface, sits between condyle and temporal bone
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intermediate division of intra-articular disc
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intermediate thickness, innervated and vascularized
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anterior division of intra-articular disc
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attached to bone, joint capsule, and tendon of lateral pterygoid muscle (superior head)
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anterior attachment of disc
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attached to the bilaminar retrodiscal tissue
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posterior attachment of disc
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attaches posteriorly to the temporal bone
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superior lamina
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attaches to the neck of the mandibular condyle
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inferior lamina
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The bilaminar retrodiscal tissue is designed as a _______ anchor to limit _______ translation of the disc.
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Designed as a POSTERIOR anchor to limit ANTERIOR translation
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TMJ joint capsule is loose _______, and tight ________.
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Loose - Anterior/Posterior
Tight - Medial/Lateral |
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Lateral ligament for stability of joint and disc
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tempromandibular ligament
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help attach mandible to cranium and limit extreme movements of TMJ
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sphenomandibular and stylomandibular ligaments
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movement in lower joint space; the mandibular condyles roll on the inferior surface of disc; this occurs during first < 50% of opening
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rotation
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movement in upper joing space, the condyle AND disc slide together; added rotation during last <50% for full opening
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translation
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