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17 Cards in this Set
- Front
- Back
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Classify the temporomandibular joints:
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DIARTHROIDAL (freely movable)
SYNOVIAL (freely movable) GINGLYMUS (hinge like) |
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Bony components of the TMJ:
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GLENOID FOSSA
ARTICULAR EMINENCE CONDYLAR PROCESS |
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Tissue covering articulating surfaces of the TMJ:
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FIBROELASTIC CT
FIBROCARTILAGE disk (avascular)- anterior band is thick zone –intermediate thin zone, THIC |
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Functions of the TMJ disk:
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SHOCK ABSORBER
CONNECTS ARTICULAR EMINENCE B/W TEMPORAL AND MANDIBLE DIVIDES INTO UPPER AND LOWER COMPARTMENTS. |
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Classify type of tissue of TMJ disk:
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NONINERVATED, AVASCULAR
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Major components of the extracellular matrix of the TMJ disk:
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PROTEOGLYCANS
CHONDROITIN SULFATE HYLURONIC ACID KERATIN SULFATE DERMATIN SULFATE |
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Main cells found in the TMJ disk:
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CHONDROCYTES
FIBROBLASTS SYNOVIAL CELLS |
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Functional significance of discal proteoglycans in relation to the function of TMJ:
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STRUCTURAL INTEGRITY OF DISK—RESIST DEFORMATION BY COMPRESIVE FORCES
“SHOCK ABSORBER” |
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Major structural differences b/w the TMJ disc and the discal ligaments:
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DISK-TOUGH
COMPACT, TYPE I AND II COLLAGEN FIBROCARTILAGE LIGAMENTS ELASTIC FIBERS MYOFIBRILS |
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Main artery and main nerve that supplies the TMJ:
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EXTERNAL CAROTID
SUPERFICIAL TEMPORAL AND MAXILLARY ARTERIES (branches) TRIGEMINAL NERVE AURICULO-TEMPORAL MASSETERIC DEEP TEMPORAL NERVES (branches) |
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High concentration of elastic fibers found in TMJ:
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POSTERIOR BILAMINAR ZONE (BLZ)
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Function of posterior bilaminar zone:
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PREVENTS OVER STRETCHING
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Discal ligaments of TMJ:
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POST. BLZ
ANT. BLZ MEDIAL COLLATERAL LATERAL COLLATERAL |
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Locations and structural components of the TMJ synovial membrane:
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INNER SURFACE OF JOINT EXCEPT FOR ARTICULAR SURFACE- INTERNAL AND SUBINTERNAL LAYERS
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Main 2 cell types found in TMJ synovial membrane:
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A OR M (macrophage-like)
B OR S (fibroblast-like) |
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Accessory ligaments of the TMJ:
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STYLOMANDIBULAR
PTERYGOMANDIBULAR RAPHE |
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The muscle of mastication that is closely related to the TMJ function and its fibers insert on the TMJ disc:
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SUPERIOR HEAD OF LATERAL PTERYGOID MUSCLE
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