|
Masseter is covered by
|
Platysma; Risorius; Parotid
gland |
|
Principal postioner of
mandible during elevation is the |
Temporalis
|
|
The fan shaped muscles of
mastication is the |
Temporalis
|
|
The antagonist muscle to
masseter while retruding jaw is the |
Posterior temporalis. The
anterior pterygoid is synergistic with masseter while clenching. |
|
The facial muscle(s) active
during opening of jaw is(are) |
Digastric group of muscles;
Mylohyoid and geniohyoid; Lateral pterygoid |
|
When the jaw is opened
against resistance the |
Temporalis remains silent
|
|
The antagonist muscle of
elevator muscles is the |
Digastric group of muscles;
Mylohyoid and geniohyoid; Suprahyoid muscles |
|
With mandible is retruded
with mouth closed, the muscle involved are |
Posterior fibers of
temporalis; Suprahyoid fibers; Infrahyoid fibers |
|
The duration of each
chewing cycle is between |
0.6 – 1 second
|
|
The chewing forces reaches
a maximum with |
Centric occlusion
|
Prof. Rooban Thavarajah
Oral and Maxillofacial Pathologist
List