Nerve Supply of Oral Cavity in Dentistry
Explore the intricate nerve supply of the oral cavity including lips, buccal mucosa, palate, and tongue. Learn about the various sensory nerves that innervate different regions and their origins from major cranial nerves. Enhance your knowledge of oral anatomy for comprehensive dental practice.
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Presentation Transcript
PURPOSE STATEMENT BY THE END OF THIS LECTURE THE STUDENT MUST BE ABLE TO- Enumerate various nerves s that supply the oral cavity that is- Lips Buccal mucosa Palate Tongue Floor of mouth Gingiva Teeth
LEARNING OBJECTIVES At the end of the lecture the student should be able to S.N. Learning Objectives Domain Level Criteria Condition Condition 1 Enumerate various nerves s that supply the oral cavity Cognitive Must Know All
LIPS Sensory Nerves of the Lips- The sensory nerves of the upper and lower lips are from the infraorbital and mental nerves, which are branches of the maxillary (CN V2) and mandibular (CN V3) nerves.
BUCCAL MUCOSA Sensory Nerves of the buccal mucosa- These are branches of the maxillary and mandibular nerves. They supply the skin of the cheeks and the mucous membrane lining the cheeks.
PALATE Nerves of the Palate - The sensory nerves of the palate, which are branches of the pterygopalatine ganglion, are the greater and lesser palatine nerves. They accompany the arteries through the greater and lesser palatine foramina, respectively.
The greater palatine nerve supplies the gingivae, mucous membrane, and glands of the hard palate. The lesser palatine nerve supplies the soft palate.
Another branch of the pterygopalatine ganglion, the nasopalatine nerve, emerges from the incisive foramen and supplies the mucous membrane of the anterior part of the hard palate.
TONGUE Anterior 2/3 of tongue- Motor Innervation- All muscles by hypoglossal nerve (CN XII) except palatoglossus muscle (by the pharyngeal plexus) General Sensory Innervation- Lingual nerve (branch of mandibular nerve CN V3)
Posterior 1/3rd-Glossopharyngeal nerve (CN IX) Special Sensory Innervation- Chorda tympani nerve (branch of facial nerve) Posterior 1/3rd- Glossopharyngeal nerve (CN IX)
FLOOR OF MOUTH The floor of mouth is supplied by- Lingual branch of trigeminal nerve. Hypoglossal nerve Pharyngeal branch of Vagus nerve
GINGIVA The gingiva is well innervated, Different types of nerve endings such as the Meissner or Krause corpuscules end bulbs, loops or fine fibers that enter the epithelium as ultraterminal fibers supply it with sensory impulses.
TEETH The abudant nerve supply in the pulp of teeth in the oral cavity. The peripheral axons form a network of nerves locatrd adajacent to cell rich zone. This is termed as the parietal layer of nerves also known as plexus of Raschkow.
Location and function Muscles Nerve Epicranius: Frontalis and Occipitalis facial nerve eyebrows and scalp Orbicularis oris facial nerve closes lips Zygomaticus major facial nerve smiling Zygomaticus minor facial nerve smiling Levator labii superioris facial nerve upper lip Levator labii superioris alaeque nasi facial nerve upper lip
Location and function Muscles Nerve Lower lip Depressor labii inferioris Facial nerve Depressor anguli oris facial nerve frowning frowning (during fear or shock) Platysma facial nerve Buccinator facial nerve cheeks Mentalis facial nerve chin Platysma facial nerve frowning
Location and function Muscles Nerve Orbicularis oris Facial nerve closes eye closing and protruding mandible, Masseter Trigeminal nerve elevates and controls side to side movement of mandible elevates mandible, protracts mandible, opens mouth. Temporalis Trigeminal nerve Medial pterygoid Trigeminal nerve Lateral pterygoid Trigeminal nerve Genioglossus Hypoglossal nerve protraction, Styloglossus Hypoglossal nerve elevation and retraction,
Muscles Nerve Location and function Hypoglossus Hypoglossal nerve depresses tongue Pharyngeal plexus, pharyngeal branch of vagus nerve Trigeminal nerve and Facial nerve elevates tongue while swallowing Palatoglossus hyoid and mandible movement Digastric Stylohyoid Facial nerve elevates hyoid hyoid and mandible movement Mylohyoid Trigeminal nerve hyoid, tongue, and mandible movement Geniohyoid Cervical nerve C-1 Sternocleidomastoid Accessory nerve nodding and turning
SUMMARY Enumerate various nerves s that supply the oral cavity that is- Lips Buccal mucosa Palate Tongue Floor of mouth Gingiva Teeth
BIBLIOGRAPHY BIBLIOGRAPHY Color Atlas And Text Book Of Oral Anatomy, Histology Berkovitz, B. 1STedition. Oral Development and Histology Avery, j. K.1st edition. Oral Histology : Development, Structure and Function Tencate, 4thedition. Dental Embryology, Histology & Anatomy. Marry Bath- Balogh Inergaret. 2ndedition.
