part 3 clined TMJ

abnormal interdigitation of teeth; the teeth of the mandible are lateral to the upper teeth on oneside andmedial onthe opposite side. ○

CROSSBITE:

mandibular teeth lies anterior to the maxillary teeth

UNDERBITE:

the anterior maxillary incisors extend below the anterior mandibular incisors when the jaw is in centric occlusion

○ OVERBITE:

■ Normal“straight-jawed” profile ■ avertical line dropped perpendicular to the bipupital line must touch the upper and lower lips and the tip of the chin ○

○ ORTHOGNATHICPROFILE

■ “Receding chin”; Chin lies behind the vertical line

RETROGNATHIC

■ “Protruding/strong chin”; Chin is in front of the vertical line

○ PROGNATHIC

: deviation to the (L) on opening

C-TYPE CURVE

deviation to the (R)

■ REVERSE C-TYPE CURVE:

■ d/t muscle imbalance or medial displacement; chin deviates to affected side d/t spasm of pterygoid/masseter muscles

● Earlydeviation: mmspasm

● Late deviation: capsulitis/tight capsule

REVERSE S-/S-TYPE CURVE:

: partially covers the sharp angle of the mandible ● Ifswollen,the angle of the mandible is covered by a boggy, soft gland, and no longer feels sharp

PAROTID GLAND

MMT

Completes available ROM and holds against strong resistance

FUNCTIONAL (F):

MMT

Motion is decreased and resistance is minimal

WEAKFUNCTIONAL (WF):

MMT

: Minimal motion occurs and no resistance is tolerated

NON-FUNCTIONAL (NF)

MMT

Nomotionoccurs

0: