MUSCLE
ACTION
POSSIBLE OCCLUSAL CONNECTION
Masseter Superficial
Power Closing
Excursive interferences - especially immediately
leaving centric relation stops
If unilateral - possible infraocclusion on same side or
hyperocclusion on the opposite side
Masseter Deep
Elevation and Retrusion
Excursive interferences
Dentist induced retrusive inclines
Retrusive forces in lateral excursions
Temporalis Anterior
Elevation - Movement
rather than power
Excursive interferences - especially in premolars
Temporalis Posterior
Retrusion
Medial
Pterygoid
Power Closing
Return Mandible to CR
from excursions
Lateral
Pterygoid
Centric relation interferences
If unilateral, look for interfering inlcines that direct
Horizontally positions
mandible toward the opposite side from CR to MIP
mandible in protrusive
Possible protrusive edge-to-edge irregularities
and lateral excursions
(resting on one central only)
Involved in positioning
Possible irregularities on lingual surfaces of upper
mandible from CR to MIP
anteriors preventing the mandible from moving in
protrusive on a straight path
Anterior
Digastric
Retrudes mandible
Dentist induced retrusive inclines
Assists opening mandible
SCM
Splenius
Capitus
Trapezius
Dentist induced retrusive inclines
Retrusive forces in lateral excursions
Excursive interferences
Rotates head
Possibly affected by CR interferences especially
retrusive inclines
Postural problems
Consider adjunctive therapies (physical therapy)
Positions head
Possibly affected by CR interferences especially
retrusive inclines
Postural problems
Consider adjunctive therapies (physical therapy)
Postural
Possibly affected by CR interferences especially
retrusive inclines
Postural problems
Consider adjunctive therapies (physical therapy)