TMJ Flashcards
Tragus
Flap of skin just anterior to the external auditory meatus
Zygomatic Arch
- Anterior to ear canal, merges with the orbit
- Formed by temporal and zygomatic bones
Movement of the Mandibular Condyle
-Place fingers just in front of ear and anterior to mastoid process
1st motion of TMJ is the rolling
2nd motion is the anterior glide [Disc glides with mandible]
Temporalis
- Place fingers 1 inch superior to zygomatic arch
- Have pt clench/relax their jaw
- Move fingers around and try to outline it
Masseter
- Place fingers between zygomatic arch and angle of mandible
- Have your partner clench/relax their jaw
Digastric
- Place fingertips along the underside of the mandible
- Have partner place tip of tongue firmly against roof of the mouth
Superficial Temporal Artery
Palpate anterior to the ear and superior to the zygomatic arch
Facial Artery
Locate masseter’s anterior border, place fingers next to the base of the mandible and feel for the artery
Platysma
Felt of lateral sides of the neck.
Ask partner to grimace (depress lower lip and angle of mounth)
Overbite
Vertical overlap
Cannot see bottom teeth
Overjet
Horizontal overlap
Mandibular Depression ROM
- Normally 40-50 mm (2 stacked fingers)
- Check for lateral deviations
- Functional: 30-50 mm [3-4 fingers or 2-3 knuckles]
Lateral Excursion ROM
- Normal: 10-12 mm
- Varies between 8-15 mm depending on source
- Measured using the distance between upper and lower central incisors
- Avoid cervical compensation
Protrusion ROM
- Normal: 6-9 mm
- Varies between 3-10 mm depending on source
- Avoid cervical compensation
MMT Grades
F = Functional WF = Weak Functional NF = Non-Functional 0 = Absent
