|
The facial muscle contraction
is monitored by receptors in |
Tendons (golgi tendon
organs); Muscles (muscle spindles); Other receptors( skin, joint) |
|
The fibers that are capable
of rapid contraction and high tension but fatigue rapidly is the |
Type I or phasic fibers.
The type II or tonic functioning fibers handle lower contraction tension and is resistant to fatigue. |
|
The lateral pterygoid
muscles function to stabilize the tempromandibular joint and is made predominantly of |
Type II or Tonic fibers
|
|
The path of opening and
closing of the condyle without involving the translation of condyle is the |
Centric relation
|
|
In natural dentition
|
Centric occlusion is
anterior to centric relation by 1 millimeters |
|
The centric relation is
|
Tooth determined position.
The condyle in the articular fossa determines the centric relation |
|
Basic movements of condyle
include(s) |
Hinge movement; Gliding
movement; Translation |
|
In lateral excursion of
mandible, the condyle appears to rotate with a slight lateral shift referred as |
Bennett movement
|
|
The maximum lateral shift
is |
10-12 millimeters.
Protrusive movement is 8 to 11 millimeters and retrusive movement is 1 millimeter. |
|
The superior head of
lateral pterygoid muscle functions to |
Close jaw. The inferior
head functions to open jaw |
Prof. Rooban Thavarajah
Oral and Maxillofacial Pathologist
List