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RESD- Stomatognathic

Stomatognathic System/TMJ

4 Structural elements 1) Teeth 2) Bones 3) Cartilage 4) Ligaments
3 Functional elements 1) Muscles 2) Blood supply 3)Nerves
3 Bony parts of the system 1) Maxilla 2) Mandible 3) TMJ
5 parts of the maxilla 1. Body 2. Zygomatic Process 3. Nasal process 4. Palatine process 5. Alveolar process
2 Horizontal components of the mandible 1. Body 2. Alveolar process to hold teeth
3 vertical components of the mandible 1. Ramus 2. coronoid process 3. condyles
3 parts of the TMJ 1. temporal bone 2. glenoid fossa 3. condyle
4 Ligaments 1. capsular 2. temperomandibular 3. sphenomandibular 4. stylomandibular
Location of he capsular ligament Encapsulates the TMJ (synovial capsule)
Attachment of the capsular ligament Condyle of the mandible to the zygomatic process
Attachment ofthe temperomandibular ligament Lateal aspect of the condylar neck to the zygomatic process
Function of the temperomandibular ligament Rotation (up to the point where the jaw must translate)
Main suspensory ligament in hinge movement (rotation) Temperomandibular ligament
Attachment of the sphenomandibular ligament From the medial ramus to the sphenoid bone
Function of sphenomandibular ligament Translation (takes over after rotation)
Main suspensory ligament in translation Sphenomandibular ligament
Attachment of the stylomandibular ligament Distal ramus to the styloid process
Function of the stylomandibular ligament Prevents excessive anterior drift when opening widely
CT type of the disc assembly Dense avascular collagenous
Why is it good that there are no nerves in the disc assembly? Otherwise, with breakdown, there would be pain in the disc
Shape of the disc assembly Biconcave
Two ligaments that attach to the disc assembly Medial and lateral collateral ligaments
4 muscles of mastication 1. Masseter 2. Temporalis 3. Lateral (external) pterygoid 4. Medial pterygoid
Muscles of mastication or neck muscles: Which are used for closing the mouth? Muscles of mastication
Function of the masseter Elevate the mandible/clench
Origin of the masseter Zygomatic arch
Insertion of the masseter Lateral mandibular ramus
Origin of the temporalis muscle Temporal fossa
Insertion of the temporalis muscle Coronoid process
Function of the anterior and middle belly of the temporalis muscle Elevate the mandible
Function of the posterior belly of the temporalis muscle Retrude the mandible
Origin of the medial pterygoid Medial pterygoid plate
Insertion of the medail pterygoid Medial ramus/mandibular angle
Function of the medial pterygoid muscle Elevate the mandible
Function of the inferior and superior lateral pterygoid Protrude mandible/side to side movement
Origin of the inferior head of the lateral pterygoid Lateral surface of lateral pterygoid plate
Insertion of the inferior head of the lateral pterygoid Pterygoid fovea on condylar neck
Origin of the superior head of the lateral pterygoid Greater wing of the sphenoid
Insertion of the superior head of the lateral pterygoid TMJ meniscus and pterygoid fovea
Two muscles of the "mandibular sling" 1. massetor 2. medial pterygoid
Most impotant suprahyoid muscle Digastric
4 other functional muscles 1. suprahyoid 2. infrahyoid 3. SCM 4. trapezius
Functions of the suprahyoids Depress/retract mandible, elevate hyoid/larynx
4 Infrahoid muscles 1. thyro 2. sterno 3. sternothyroid 4. omo
Function of the infrahyoids Lower the hyoid bone and larynx
Four extrinisic tongue muscles 1. palatoglossus 2. genio 3. stylo 4. hyo
3 things attached to styloid process 1. Styloglossus 2. Stylomandibular ligament 3. Stylohyoid
2 Major arteries to the head/neck 1. internal carotid 2. external carotid
3 branches of the external carotid 1. lingual 2. facial 3. maxillary
Major plexus of veins in the head that will cause hematoma if you hit it with a PSA Pterygoid plexus
3 divisions of Trigeminal nerve 1. opthalmic 2. maxillary 3. mandibular
4 Sensory divisions of the maxillary division 1. PSA 2. greater palatine 3. nasopalatine 4. infraorbital
4 sensory branches of the mandibular division 1. IA 2. mental 3. lingual 4. buccal
Motor branch of the mandibular division masticatory nerve
Innervation of the muscles of mastication Trigeminal neve, Mandibular division
Name of the sensory branch of the fascial nerve Glossopalatine
2 Sensory ares of the facial nerve 1. Anterior 2/3 tongue 2. soft palate
2 Motor areas of the facial nerve 1. muscles of facial expression 2. submaxillary/sublingual glands
Function of the TMJ Connect mandible to maxilla
TMJ joint type Diarthrosis (free moving)
TMJ movement type Ginglymoarthroidal (rotation and translation)
Bony components of the TMJ 1. Condyles 2. Glenoid fossa 3. Articular eminence
A line bisecting the midline of condyles form an angle of ____ degrees 135
True or false: Retrodiscal tissue does not have nerves or blood supply False, if there is displacement of the joint, this will move into the condylar space and cause pain
Two types of joint spaces of the TMJ 1. Superior cavity 2. Inferior cavity
Cavity that predominates during translation Superior cavity
Cavity that predominates during rotation Inferior cavity
4 Suprahyoid muscles 1. Genio 2. Mylo 3. Stylohyoid 4. Digastric
Created by: janygb143