8d46the oral cavity
TRANSCRIPT
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Dr. Lorena C. Balacanao
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The External Mouth
Composes primarilyof the upper andlower lip
Separated to theskin by vermillionborder
Bounded
Superiorly Philtrum
Supero-laterally-Naso-labial fold
Inferiorly-
Mento-labial fold
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Parts of the External mouth
Philtrum
Vermillion
borderMento-labialfold
Naso-labialfold
Angle ofthemouth
Oralfissure
Upperlip
Lower lip
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Muscle that supports the external
mouth is the Orbicularis OrisMuscle
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Functions of
mouth1. The first part of
digestive systemwherein masticationoccur.
2. It receives food
(ingestion) and breakup the food intosmaller pieces(digestion).
3. Takes part in
respiration as well asin speech production
4. Lastly it conveysemotion
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The 2 divisionsof the oral cavity
1. Oral vestibule
2. Oral cavity proper
The Internal Mouth
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The Oral
vestibuleA slit like spacebounded
Laterallyby cheek
and lips
Mediallyby the
buccal and labialsurfaces of the
upper and lowerteeth
Posteriorlyby theRetromolar area
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Parts A- attachedgingiva
B- Free gingiva C- Upper labial
frenum
D- Mucobuccalfold
E- InterdentalPapilla
F- Cheek G- Oral vestibula
I- Mucolabial fold
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Oral vestibule
Oral vestibule- Leftside
Oral vestibule- rightside
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Part
Upper buccalfrenum
Lower buccalfrenum
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The oralcavity
properBounded
Laterallyby palatal andlingual surfaces of theupper and lower teeth
Superiorlyby the palate(hard & soft)
Inferiorlyby the tongue
and or the floor of themouth
Posteriorlyby theisthmus of fauces
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Part of the Oralcavity proper
Hard Palate
Uvula
Palatoglossalarch
Palatine
tonsil
Tongue
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Superior boundary
Palate- PartsIncisisve papilla
Palatine Rugae
Median
palatineraphe
Maxillary
tuberosity
FoveaPalatina
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Bony framework of the hard palate
Palatineprocess ofthe maxilla
Horizontalplate of the
palatine bone
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InferiorboundaryThe Floor of the mouth
Parts
Ventralsurface of thetongue
LingualFrenulum
Sublingualfold
Sublingualcaruncle
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The tongue
Composes of
Anterior 2/3 (body)andPosterior 1/3 (root)
Presence of lingualpapillae that containstaste buds
namely:Filiform papilla
Fungiform papilla
Foliate papilla
Circumvallate papilla
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Nerve Innervations
Anterior 2/3 of thetongue
Posterior 1/3 of thetongue
Taste sensation Chorda tympani of
the VII CN or facialnerve
General Sensation
Lingual Nerve of themandibular division ofV CN or TrigeminalNerve
Taste and generalsensation is by
IX CN orglossopharyngeal
Nerve and X CN or Vagus nerve
via internal laryngealNerve
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Muscles of the tongue
Both is innervated by theXII CN or Hypoglossalnerve
Extrinsic muscles
1. Genioglossus
2. Hyoglossus
3. Stlyoglossus 4. Palatoglossus
Its action is to changethe 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 ofthe tongue
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Extrinsic Musclesof the tongue
GenioglossusMuscle
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Extrinsic Muscleof the tongue
Styloglossus
muscle
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Intrinsic musclesof the tongue
Superior
longitudinal
Muscle
Vertical and
Transverse
Muscle
Inferior
longitudinal
Muscle
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Posterior boundary
Isthmus of fauces-parts
Isthmus offauces
Uvula
Palatopharyngeal
arch
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The Salivary Glands
1. Parotid Gland- thelargest of the 3salivary gland
Located anterior tothe ear, extendingfrom the cheekbone up to thelower jaw
Parotid orStensens duct
opens at the oralvestibule oppositeupper second molar
2. Submaxillary orsubmandibula gland-
Located at the floor ofthe mouth posteriorlyoccupying the digastrictriangle
Whartons duct opens
at the sublingualcaruncle
3. Sublingual gland
Located at the floor ofthe mouth anteriorly
Bartolins and Ravinisare the duct of SL glandopens at the sublingualfold
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The Salivary glands
Sublingual gland
Submaxillary gland
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Anterior teeth
Central Incisor
Canine
Lateral Incisor
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Posterior teeth
2nd molar
1st molar
2nd premolar
1st premolar
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Upper permanentteeth
Central incisor
Lateral incisor
Canine
1st premolar
2nd premolar
1st molar
2nd molar
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Anterior teeth
Central incisor
Lateral incisor
canine
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Posterior teeth
2nd molar
1st molar
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Smile andeverybody will smileat youRemember mouthexpresses differenttype of emotions
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Thank you-The End