Term
| True/False: Both TMJs have to function together to accomplish the task of eating, chewing, swallowing and speaking. |
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Definition
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Term
| A __ divides the TMJ into 2 joint spaces. |
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Definition
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Term
| The Lower TMJ is a ? type joint formed by the mandibular condyle and the inferior disc surface. |
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Definition
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Term
| The lower TMJ joint is formed by the ? and ? |
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Definition
| mandibular condyle and inferior disc surface |
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Term
| The mandibular condyle is covered by what type of tissue? |
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Definition
| dense fibrous connective tissue and fibral cartilage. (THIS IS UNIQUE - IT's not hyaline cartilage) It's built to last, can heal better |
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Term
| What is the advantage of the mandibular condyle being covered by dense fibrous connective tissue and fibral cartilage as opposed to hyaline cartilage? |
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Definition
| It is built to last and can heal better |
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Term
| The upper TMJ is a ? joint formed by the articular eminence and the superior disc surface |
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Definition
| gliding joint (aka sliding joint) |
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Term
| The articular eminence of the upper TMJ joint is covered by ? (type of tissue) |
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Definition
| fibrocartilage (this is unique) |
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Term
| The Intra-Articular disc of the TMJ is made of ? and ? (type of tissue) which increases congruency and cushions surfaces during compression. |
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Definition
| fibrocartilage and dense fibrous connective tissue |
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Term
| The intra-articular disc is a layer of protection between the ? and ? (name the structures) |
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Definition
| condyle and articular eminence |
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Term
| The intra-articular disc is made of 3 divisions. Name the 3. |
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Definition
| Posterior, Intermediate and Anterior |
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Term
| Which of the 3 divisions of the intra-articular discs is the thickest, and most innervated and vascularized. |
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Definition
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Term
| Which of the 3 divisions of the intra-articular discs is the thinnest, with no innervations. |
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Definition
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Term
| Which of the 3 intra-articular discs has the weight bearing surface and sits between the condyle and temporal bone. |
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Definition
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Term
| The Posterior division of the intra-articular disc sits between the ? and ? (name the structures) |
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Definition
| condyle and mandibular fossa |
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Term
| The intermediate division of the intra-articular disc sits between the ? and ? (name the structures) |
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Definition
| condyle and temporal bone |
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Term
| The anterior attachment of the intra-articular disk of the TMJ is attached to ?, ? and the tendon of the ? |
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Definition
| bone, joint capsule and tendon of lateral pterygoid muscle (superior head). |
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Term
| The posterior attachment of the intra-articular disk of the TMJ is attached to the ? |
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Definition
| bilaminar retrodiscal tissue |
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Term
| The unique fibro-elastic bilaminar retrodiscal tissue is designed as a posterior anchor to limit ? translation of the disc |
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Definition
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Term
| The superior lamina (of the unique fibro-elastic bilaminar retrodiscal tissue) attaches posteriorly to the ? |
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Definition
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Term
| The inferior lamina (of the unique fibro-elastic bilaminar retrodiscal tissue) attaches to the ? |
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Definition
| neck of the mandibular condyle |
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Term
| True/False: The joint capsule is highly vascularized and innervated. |
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Definition
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Term
| The joint capsule is (? tight or loose) anterior and posterior. |
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Definition
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Term
| The joint capsule is (?loose or tight) medially and laterally |
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Definition
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Term
| Why is the joint capsule tight medially and laterally? |
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Definition
| for lateral stability with chewing. |
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Term
| Name the 3 ligaments of the TMJ |
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Definition
| Temporomandibular, Sphenomandibular and Stylomandibular |
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Term
| The temporomandibular ligament is the lateral ligament for stability of ? and ? |
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Definition
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Term
| The sphenomandibular and stylomandibular ligaments help attach the mandible to the ? and limit ? of the TMJ. |
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Definition
| cranium/extreme movements |
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Term
| Osteokinematics. Name all the TMJ motions possible. |
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Definition
Depression (opening)
Elevation (closing)
Protrusion (chin forward)
Retrusion (chin backward)
Lateral Deviation (lateral jaw excursion) |
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Term
| Arthrokinematics: Name the 2 movements |
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Definition
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Term
| Rotation of the TMJ occurs in the (?upper or lower? ) joint space. |
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Definition
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Term
| Translation occurs in the (?upper or lower?) joint space |
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Definition
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Term
| ? movement occurs during the first 50% of opening of the TMJ |
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Definition
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Term
| ? movement occurs during the last 50% for full opening of the TMJ |
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Definition
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Term
| ? movement is where the mandibular condyle rolls on the inferior surface of the disc. |
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Definition
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Term
| ? movement is where the condyle AND disc slide together |
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Definition
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Term
| ? movement occurs in the lower joint space |
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Definition
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Term
| ? movement occurs in the upper joint space. |
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Definition
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Term
| For TMJ ? and ?, the movement is all translation of condyle-disc complex. |
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Definition
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Term
| For TMJ ?, the movement is mostly translation of condyle-disc complex with some multiplane rotation (mostly horizontal plane) |
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Definition
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Term
| Name the muscles involved in TMJ depression |
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Definition
| lateral pterygoid (inferior head) and suprahyoids |
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Term
| Name the muscles involved in TMJ Elevation |
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Definition
| temporalis, masseter and medial pterygoid |
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Term
| Name the muscle involved in Protrusion |
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Definition
| lateral pterygoids; masseter and medial pterygoid less |
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Term
| Name the muscles involved in Retrusion of the TMJ |
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Definition
| temporalis and suprahyoids |
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Term
| Name the muscles involved in Lateral Deviation |
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Definition
| Pterygoids (contralateral) and temporalis/masseter (ipsalateral) |
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Term
| The suprahyoids help with 2 types of TMJ movements - name the 2 |
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Definition
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Term
| Hypomobility of the TMJ is b/c of a placement problem where there is severe ? displacement of the disc which prevents forward and downward motion of the mandible. |
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Definition
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Term
| Hypermobility is due to the disc being displaced ?. The disk shifts under the condyle displacing the disc but the TMJ is still mobile here. |
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Definition
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Term
| Pain in the TMJ causes the muscles to be (? hypertonic or hypotonic?) |
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Definition
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