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1.
Major components for mastication
a. teeth: number, position, size, shape of the
contacting surfaces
b. muscles for mastication and the
innervations
c. joints
2.
Temporo-Mandibular Joint (TMJ)
a.structure
l between the temporal bone at the base of the skull and the condyle
of the mandible
l on the temporal side: glenoid fossa; articular eminence
l on the mandibular side: condylar head
l in between: a cartilaginous disc
b.movements
l at the beginning of the opening of the mouth: rotational movement
like a hinge (the condyle remains in the glenoid fossa)
l opening further: forward movement (the condyle move forward and
downward along the slope of the articular eminence)
l on chewing: one condyle (working side) stay in the fossa while the
other side (non-working side) moves forward and downward
Reference information: www.bjdental.com/
It is not intended as medical advice to any
specific person. If you have any need for personal advice or have any questions
regarding your health, please consult your Dentist for
diagnosis and treatment.
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