The Oral Cavity

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dr. b.. thank you
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1 : The oral cavityand its associated structure Dr. Lorena C. Balacanao
2 : The External Mouth Composes primarily of the upper and lower lip Separated to the skin by vermillion border Bounded Superiorly – Philtrum Supero-laterally- Naso-labial fold Inferiorly- Mento-labial fold
3 : Parts of the External mouth Philtrum Vermillion border Mento-labial fold Naso-labial fold Angle of the mouth Oral fissure Upper lip Lower lip
4 : Muscle that supports the external mouth is the Orbicularis Oris Muscle
5 : Functions of mouth The first part of digestive system wherein mastication occur. It receives food (ingestion) and break up the food into smaller pieces (digestion). Takes part in respiration as well as in speech production Lastly it conveys emotion
6 : The 2 divisions of the oral cavity Oral vestibule Oral cavity proper The Internal Mouth
7 : The Oral vestibule A slit like space bounded Laterally by cheek and lips Medially by the buccal and labial surfaces of the upper and lower teeth Posteriorly by the Retromolar area
8 : Parts A- attached gingiva B- Free gingiva C- Upper labial frenum D- Mucobuccal fold E- Interdental Papilla F- Cheek G- Oral vestibula I- Mucolabial fold
9 : Oral vestibule Oral vestibule- Left side Oral vestibule- right side
10 : Part Upper buccal frenum Lower buccal frenum
11 : The oral cavity proper Bounded Laterally by palatal and lingual surfaces of the upper and lower teeth Superiorly by the palate (hard & soft) Inferiorly by the tongue and or the floor of the mouth Posteriorly by the isthmus of fauces
12 : Part of the Oral cavity proper Hard Palate Uvula Palatoglossal arch Palatine tonsil Tongue
13 : Superior boundary Palate- Parts Incisisve papilla Palatine Rugae Median palatine raphe Maxillary tuberosity Fovea Palatina
14 : Bony framework of the hard palate Palatine process of the maxilla Horizontal plate of the palatine bone
15 : Inferior boundary The Floor of the mouth Parts Ventral surface of the tongue Lingual Frenulum Sublingual fold Sublingual caruncle
16 : The tongue Composes of Anterior 2/3 (body)and Posterior 1/3 (root) Presence of lingual papillae that contains taste buds namely: Filiform papilla Fungiform papilla Foliate papilla Circumvallate papilla
17 : Nerve Innervations Anterior 2/3 of the tongue Posterior 1/3 of the tongue Taste sensation Chorda tympani of the VII CN or facial nerve General Sensation Lingual Nerve of the mandibular division of V CN or Trigeminal Nerve Taste and general sensation is by IX CN or glossopharyngeal Nerve and X CN or Vagus nerve via internal laryngeal Nerve
18 : Muscles of the tongue Both is innervated by the XII CN or Hypoglossal nerve Extrinsic muscles 1. Genioglossus 2. Hyoglossus 3. Stlyoglossus 4. Palatoglossus Its action is to change the size or mass of the tongue Intrinsic muscles 1. Superior longitudinal M 2. Inferior longitudinal 3.Transversus M 4. Vertical M Its action is to change the shape or form of the tongue
19 : Extrinsic Muscles of the tongue Genioglossus Muscle
20 : Extrinsic Muscle of the tongue Styloglossus muscle
21 : Intrinsic muscles of the tongue Superior longitudinal Muscle Vertical and Transverse Muscle Inferior longitudinal Muscle
22 : Posterior boundary Isthmus of fauces- parts Isthmus of fauces Uvula Palatopharyngeal arch
23 : The Salivary Glands 1. Parotid Gland- the largest of the 3 salivary gland Located anterior to the ear, extending from the cheek bone up to the lower jaw Parotid or Stensens’ duct opens at the oral vestibule opposite upper second molar 2. Submaxillary or submandibula gland- Located at the floor of the mouth posteriorly occupying the digastric triangle Whartons’ duct opens at the sublingual caruncle 3. Sublingual gland Located at the floor of the mouth anteriorly Bartolins and Ravinis are the duct of SL gland opens at the sublingual fold
24 : The Salivary glands Sublingual gland Submaxillary gland
25 : The Permanent Teeth
26 : Anterior teeth Central Incisor Canine Lateral Incisor
27 : Posterior teeth 2nd molar 1st molar 2nd premolar 1st premolar
28 : Upper permanent teeth Central incisor Lateral incisor Canine 1st premolar 2nd premolar 1st molar 2nd molar
29 : The Deciduous Teeth
30 : Anterior teeth Central incisor Lateral incisor canine
31 : Posterior teeth 2nd molar 1st molar
32 : Smile and everybody will smile at you Remember mouth expresses different type of emotions
33 : Thank you-The End


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The anatomy of the oral cavity and its structure- Slides
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