Transcript of "Temporomandibular joint. dr. gaurav salunkhe "
P R E S E N T D B Y :
D R . G A U R A V S . S A L U N K H E
P G - S T U D E N T
O R A L & M A X I L L O F A C I A L
P A T H O L O G Y
The temporomandibular joint is the joint of
the jaw and is frequently referred to as TMJ.
ALSO KNOWN AS MANDIBULAR JOINT.
The name is derived from the two bones which form
the joint: the upper temporal bone which is part of the
cranium (skull), and the lower jaw bone called
The unique feature of the TMJs is the articular disc.
The part of the mandible which mates to the under-surface
of the disc is the condyle and the part of the temporal
bone which mates to the upper surface of the disk is the
glenoid (or mandibular) fossa.
There are six main components of the TMJ.
Articular surface of the temporal bone
1. ELEVATION & DEPRESSION
2. PROTRACION & RETRACTION
3. SIDE TO SIDE MOVEMENS
Depression- lateral pterygoid mainly
Elevation- masster, temporalis, medial petygoid of
Protrusion- lateral and medial pterygoid.
Retraction- posterior fibres of temporalis.
Lateral or side to side movement eg. turning chin
to left side- left lateral pterygoid and right medial
INNERVATION & VASCULARIZATION
Sensory innervation of the temporomandibular joint is
derived from the auriculotemporal and masseteric branches
of TRIGEMINAL NERVE.
Its arterial blood supply is provided by branches of
the EXTERNAL CAROTID ARTERY, predominately
the superficial temporal branch.
Other branches: deep auricular artery, anterior
tympanic artery, ascending pharyngeal artery,
and maxillary artery- may also contribute.