מפרק הלסת Flashcards

1
Q

TemporoMandibular Joint (TMJ) articulat surface

A
  • Temporal bone: Mandibular fossa and articular
  • tubercle Mandible: Condylar process
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2
Q

TMJ

compenents

A
  • Joint capsule
  • Synovial membrane
  • Articular disc (anterior/posterior bands, intermediate zone)
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3
Q

TMJ

ligaments

A
  • Major: Lateral temporomandibular ligament (thickened lateral portion of capsule, strengthens TMJ laterally)
    בין קצה הזיגומה לצוואר המנדיבולה
  • Minor:
    • Stylomandibular ligament- מהסטילואיד עד לזווית של המנדיבולה, מאחורה. יחסית חיצונית.
    • sphenomandibular ligament- מספנואיד, יד למנדיבולה, בחלקה הפנימי. בהמשך של האינטנל אובליק.
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4
Q

TMJ

movement and uscle that contribute that movments

Rotational movements

A
  • Elevation:Temporalis, masseter and medial pterygoid muscles
  • Depression: Lateral pterygoid, digastric, geniohyoid and mylohyoid muscles
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5
Q

TMJ

movement and uscle that contribute that movments

Translational movements

A
  • Protrusion: Lateral pterygoid- השריר הראשי
    and medial pterygoid muscles
  • Retraction: Posterior fibers of temporalis, deep part of masseter, geniohyoid and digastric muscles
  • Lateral deviation (left or right): Posterior fibers of temporalis, digastric, mylohyoid and geniohyoid muscles (ipsilateral movement); lateral and medial pterygoid muscles (contralateral movement)
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6
Q

underbite

A

הלסת התחתונה הולכת קדימה מדי

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7
Q

overbite

A

הלסת התחתונה הולכת אחורה מדי

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