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The Oral Cavity

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The Oral Cavity No Disclosures Oral Cavity Anatomy Karen K. Moeller M.D. Norton Children’s Hospital University of Louisville Oral Cavity Oral Cavity Anterior Tonsillar Pillar Circumvallate Papillae F.Netter Oral Cavity Oral Cavity Oral Cavity Oropharynx * * ***The base of tongue/lingual tonsils and palatine tonsils are in the oropharynx. Oral Cavity Oral Cavity Oral mucosal space Sublingual space Oral mucosal space Sublingual space Root of tongue Submandibular space Root of tongue Submandibular space Oral Cavity Oral Cavity Oral mucosal space Sublingual space Oral mucosal space Sublingual space Root of tongue Submandibular space Root of tongue Submandibular space Oral Cavity Oral Tongue Oral mucosal space Sublingual space Root of tongue Submandibular space Oral Tongue Tongue: extrinsic muscles Palatoglossus Styloglossus Genioglossus Hyoglossus T1 T2 Intrinsic tongue muscles Amirsys Tongue: extrinsic muscles Tongue: extrinsic muscles Palatoglossus Palatoglossus Styloglossus Styloglossus Genioglossus Genioglossus Hyoglossus Hyoglossus Amirsys Amirsys Tongue: extrinsic muscles Tongue: extrinsic muscles Palatoglossus Palatoglossus Styloglossus Styloglossus Genioglossus Genioglossus Hyoglossus Hyoglossus Amirsys Amirsys Tongue: Motor Innervation Tongue: extrinsic muscles Intrinsic tongue muscles Palatoglossus (CN 10) (CN 12) Styloglossus (CN 12) Genioglossus (CN 12) Hyoglossus (CN 12) Amirsys Genioglossus Tongue: extrinsic muscles Tongue: extrinsic muscles Palatoglossus Hyoglossus Tongue: extrinsic muscles Root of Tongue Styloglossus Root of Tongue Root of Tongue Genioglossus Lingual septum Floor of Mouth Floor of mouth Mylohyoid Mylohyoid Geniohyoid Anatomy Expert Floor of mouth Sublingual Space Mylohyoid msc Geniohyoid F.Netter Sublingual Space Sublingual Space Hyoglossus msc F.Netter Mylohyoid msc Sublingual Space Sublingual Space ! Glossopharyngeal ! Glossopharyngeal nerve nerve ! Lingual artery & vein ! Lingual artery ! Hypoglossal nerve ! Hypoglossal nerve ! Sublingual gland ! Lingual nerve ! Lingual nerve ! Sublingual gland F.Netter ! Submandibular duct & F.Netter ! Submandibular duct & deep gland deep gland Sublingual Space Sublingual Space ! Glossopharyngeal ! Glossopharyngeal nerve nerve ! Lingual vein ! Lingual artery & vein ! Hypoglossal nerve ! Hypoglossal nerve ! Lingual nerve ! Lingual nerve ! Sublingual gland ! Sublingual gland ! ! F.Netter Submandibular duct & F.Netter Submandibular duct & deep gland deep gland Sublingual Space Sublingual Space ! Glossopharyngeal ! Glossopharyngeal nerve nerve ! Lingual artery & vein ! Lingual artery & vein ! Hypoglossal nerve ! Hypoglossal nerve ! Lingual nerve ! Lingual nerve ! Sublingual gland ! Sublingual gland ! ! F.Netter Submandibular duct & F.Netter Submandibular duct & deep gland deep gland Sublingual Space Sublingual Space ! Glossopharyngeal nerve Sublingual gland ! Lingual artery & vein ! Hypoglossal nerve ! Lingual nerve ! Sublingual gland F.Netter ! Submandibular duct & deep gland Sublingual Space Sublingual Space Lingual artery Lingual vein Sublingual Space Sublingual Space Sublingual gland Submandibular Space Submandibular Space Mylohyoid F.Netter Platysma Submandibular Space Submandibular Space ! Submandibular gland ! Submandibular gland ! Facial vein and artery ! Facial vein and artery ! Submandibular l.nodes ! Submandibular l.nodes ! Anterior belly of ! Anterior belly of digastric msc. digastric msc. ! Submental l. nodes ! Submental l. nodes ! Caudal loop of CN #12 F.Netter ! Caudal loop of CN #12 F.Netter Submandibular Space Submandibular Space ! Submandibular gland ! Submandibular gland ! Facial vein and artery ! Facial vein and artery ! Submandibular l.nodes ! Submandibular l.nodes ! Anterior belly of ! Anterior belly of digastric msc. digastric msc. ! Submental l. nodes ! Submental l. nodes ! Caudal loop of CN #12 F.Netter ! Caudal loop of CN #12 Lippincott Submandibular Space Submandibular Space ! Submandibular gland ! Submandibular gland ! Facial vein and artery ! Facial vein and artery ! Submandibular l.nodes ! Submandibular l.nodes ! Anterior belly of ! Anterior belly of digastric msc. digastric msc. ! Submental l. nodes ! Submental l. nodes ! Caudal loop of CN #12 Lippincott ! Caudal loop of CN #12 Gray’s anatomy Submandibular Space Submandibular Space Submandibular gland Submandibular nodes (level IB) Submandibular Space Submandibular Space Anterior belly of digastric Submental nodes (level IA) Oral Mucosal Space Oral Mucosal Space ! Mucosal Surface: ! Oral tongue ! Hard palate ! Lips & cheeks (buccal mucosa) ! Alveolar process (gingiva) ! Floor of mouth ! Retromolar trigone Oral Mucosal Space Oral Mucosal Space ! Mucosal Surface: ! Mucosal Surface: ! Oral tongue ! Oral tongue ! Hard palate ! Hard palate ! Lips & cheeks (buccal ! Lips & cheeks (buccal mucosa) mucosa) ! Alveolar process ! Alveolar process (gingiva) (gingiva) ! Floor of mouth ! Floor of mouth ! Retromolar trigone ! Retromolar trigone Oral Mucosal Space Oral Mucosal Space ! Mucosal Surface: ! Mucosal Surface: ! Oral tongue ! Oral tongue ! Hard palate ! Hard palate ! Lips & cheeks (buccal ! Lips & cheeks (buccal mucosa) mucosa) ! Alveolar process ! Alveolar process (gingiva) (gingiva) ! Floor of mouth ! Floor of mouth ! Retromolar trigone ! Retromolar trigone Oral Mucosal Space Oral Mucosal Space ! Mucosal Surface: ! Oral tongue ! Hard palate ! Lips & cheeks (buccal mucosa) ! Alveolar process (gingiva) Gingivobuccal ! Floor of mouth Sulcus ! Retromolar trigone Floor of Mouth “Floor of Mouth” Mylohyoid msc Mylohyoid msc F.Netter F.Netter Oral Mucosal Space Retromolar Trigone ! Mucosal Surface: ! RMT mucosa contiguous ! Oral tongue with buccal, alveolar ! Hard palate ridge & anterior tonsillar ! Lips & cheeks (buccal pillar mucosa mucosa) ! Anatomic crossroad: ! Alveolar process ! Floor of mouth (gingiva) ! Oropharynx ! Floor of mouth ! Masticator space ! Retromolar trigone ! Parapharyngeal space ! Buccal space Retromolar Trigone Retromolar Trigone ! Pterygomandibular Buccinator msc. ! Pterygomandibular Raphe Raphe ! Fascial band between ! Fascial band between buccinator & superior buccinator & superior pharyngeal constrictor pharyngeal constrictor muscle muscle ! Conduit for inferior & ! Conduit for inferior & superior disease spread superior disease spread Superior Pharyngeal from RMT from RMT Constrictor msc. Oral Mucosal Space Teeth ! Minor salivary ! Permanent dentition #32 ! Quadrant- central & lateral glands: incisor, canine, anterior & 1 16 ! Submucosal posterior premolar, 1st, 2nd & 3rd molar throughout oral cavity 32 17 ! Most commonly along ! Numbering convention kenhub inner lip, cheek & ! Maxillary right 3rdmolar (1) palate left 3rd molar (16) ! Mandibular left 3rd molar (17) right 3rd molar (32) Teeth Primary Teeth ! Permanent dentition #32 ! Quadrant- central & ! “ Milk, baby, lateral incisor, canine, deciduous teeth” anterior & posterior premolar, ! #20 total 1st, 2nd & 3rd molar ! Quadrant- 2 incisors (central & lateral), ! Naming sequence 1 canine, 2 molars ! Jaw-» side »tooth name st nd ! Mandibular left central (1 and 2 ) incisor Pre- Dentition Primary Dentition Anterior Gray’s Anatomy Gray’s Anatomy 9 months Newborn Primary Dentition Mixed Dentition Gray’s Anatomy Gray’s Anatomy 8 years 3 years Permanent Dentition Permanent Dentition 15 years 12 years 17 years Conclusion : Oral Cavity Anatomy Teeth ! The oral cavity has 4 imaging subsites: ! Oral mucosal space, Sublingual space, Submandibular space, Root of tongue ! Naming sequence ! Dentition-»jaw-»side ! “Floor of mouth” »tooth name ! Mylohyoid + geniohyoid ! Mucosal surface of anteroinferior oral cavity ! Primary maxillary ! Sublingual space right 2nd molar ! The Retromolar Trigone is an anatomic crossroad ! Maxilla and Mandible have permanent & primary 7 year old boy teeth between 6 months-12 years James Abbott Mcneill Whistler .
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