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RESD- Stomatognathic
Stomatognathic System/TMJ
| Question | Answer |
|---|---|
| 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
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