MOUTH CAVITY DR.AYAT ELDOMOUKY. ORAL ANATOMY GOOD OVERALL HEALTH STARTS WITH THE ORAL CAVITY…
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Transcript of MOUTH CAVITY DR.AYAT ELDOMOUKY. ORAL ANATOMY GOOD OVERALL HEALTH STARTS WITH THE ORAL CAVITY…
MOUTH
CAVIT
YD
R. A
Y AT
EL D
OM
OU
KY
ORAL ANATOMYG O O D OV E R A L L H E A LT H S TA RT S
W I T H T H E O R A L C AV I T Y…
THE LIPS
Def.CoveringContentsPhiltrumLabial frenulae
THE MOUTH CAVITY:
1-EXTENTION
2-THE OROPHARYNGEAL ISTHMUS
3-DIVISION
DIVISION OF THE MOUTH CAVITY: A-VESTIBULE B- MOUTH PROPER
VESTIBULE OF THE MOUTH
BoundariesCommunicationLateral wallOpening of parotid duct
MOUTH PROPER
Roof of mouthFloor of mouth
FLOOR OF THE MOUTH
Frenulum of the tonguePlica fimbriataSublingual fold
MUCOUS MEMBRANE OF THE MOUTH
Is strongly attached to alveolar periosteum Sensory inervation of the moutha. Roofb.Floorc. cheek
DECIDUOUS ERUPTION CHART
PERMANENT ERUPTION CHART
THE TEETH
Permanent teeth: number and eruption
Deciduous teeth
TEETH
THE TONGUE
BLOOD SUPPLY OF TONGUE
INTRINSIC MUSCLES OF THE TONGUEALL MUSCLES OF THE TONGUE ARE INNERVATED BY HYPOGLOSSAL NERVE EXCEPT PALATOGLOSSUS INNERVATED BY CRANIAL ROOT OF ACCESSORY NERVE.
EXTRINSIC MUSCLES OF THE TONGUE
GENIOGLOSSUS MUSCLE
HYOGLOSSUS, STYLOGLOSSUS, PALATPGLOSSUS
LYMPH DRAINAGE
Submental lymph nodeAubmandibular lymph nodeDeep cervical lymph node
SENSORY INERVATION
THE PALATE
Hard palate soft palate
THE HARD PALATE
UVULA
PALATINE APONEUROSIS
MUSCLES OF SOFT PALATE
MUSCULUS UVULAE
NERVE SUPPLY
BLOOD SUPPLY
PALATOGLOSSUS AND PALATOPHARYNGEAL FOLDS
SUBMANDIBULAR SALIVARY GLANDSite: it lies in submandibular (digastric triangle)
Parts: divided into two parts by mylohyoid muscle
superficial part :Shape: wedge shape with
.1superficial surface cover by skin and fascia
.2Lateral surface related to the mandibule
.3Medial surface related to the floor of the mouse
Deep part :.4Lies deep to mylohyoid muscle
.5Related to lingual and hypoglossal nerve
Submandibular duct
.6Emerge from the anterior end of the deep part
.7Open at side of the frenulum of the tongue
SUBLINGUAL SALIVARY GLANGS
Is the smallest of the three main salivary glands
It has both serous and mucous aciniSite: related to sublingual fossa of
mandibular under cover of mucous membrane of the mouth (sublingual fold)
Ducts: open into the floor of the mouse (8-20)
SITE: SUPERFICIAL SURFACE
PARTS: SURFACE OF SUPERFICIAL PART
PARTS: DEEP PART
DUCT
OPENING
NERVE SUPPLY
PAROTID GLAND
Definition
Shape
site
SURFACES AND RALATION OF PAROTID GLAND
STRUCTURE INSIDE PAROTID GLAND
PAROTID GLAND AND FACIAL NERVE
PAROTID DUCT
WORK SHEETSTRUCTURE INSIDE PAROTID GLAND
A) Auriculo-temporal n.b) Ext. carotid a → divides (behind the neck of mandible) into maxillary and superficial temporal arteries c) Retromandibular v .
d) Facial n.→ divides into 5 terminal brs.e) Deep parotid L.Ns .
NERVES OF THE GLAND
Parasympathetic (secretomotor): The preganglionic fs. reach the otic ganglion
from the lesser petrosal n. (br. from the glossopharyngeal n.)
The postganglionic fs. Arising from the otic ganglion and
Carried to the gland by the auriculo-temporal n .
IMPORTANT QUESTIONSSensory innervation of the mouth
Roof: The greater palatine and nasopalatine nerves from the maxillary division of the trigeminal nerve
Floor: The lingual nerve (common sensation), a branch of the mandibular division of the trigeminal nerve.
The taste fibers travel in the chorda tympani nerve, a branch of the facial nerve.
Cheek: The buccal nerve, a branch of the mandibular division of the trigeminal nerve (the buccinator muscle is innervated by the buccal branch of the facial nerve)
SENSORY INNERVATION OF THE TONGUE
Anterior two thirds: Lingual nerve branch of mandibular division of trigeminal nerve (general sensation) and chorda tympani branch of the facial nerve (taste)
Posterior third: Glossopharyngeal nerve (general sensation and taste)
Sensory innervation of the teeth
A. the upper teeth: supplied by ant., middle, post. Superior alveolar nerves which are branches from maxillary division of trigeminal nerve.B. the lower teeth: supplied by inferior alveolar nerve which are branches from post. Division of mandibullar division of trigeminal nerve
Mention sites of salivary glands openings
a. Opening of parotid gland duct in the vestibule of the mouth opposite the upper second molar tooth
b. Opening of submandibular duct on floor of mouth on the pilca fimbriata
c. Openings of sublingual gland open on the floor of mouth on sublingual fold
MCQWhich of the following nerves carry taste sensation from post 1/3 of the tongue
A. Lingual nerve
B. Glossopharyngeal nerve
C. Greater petrosal nerve
D. Chorda tympanic nerve
Which of the following nerves carry taste sensation from ANT 2/3of the tongue
E. Lingual nerve
F. Glossopharyngeal nerve
G. Greater petrosal nerve
H. Chorda tympanic nerve
All muscles of the tongue are innervated by hypoglossal nerve except------------
I. Styloglossus muscle
J. Palatoglossus muscle
K. Hyoglossus muscle
L. Intrinsic muscles
A patient is unable to taste a piece of sugar placed on the anterior part of the tongue. Which cranial nerve is likely to have a lesion?
(a) Hypoglossal
(b) Vagus
(c) Glossopharyngeal
(d) Facial
The intrinsic muscles of the tongue -------------------- the tongue
A. Protrude
B. Retract
C. Depress
D. Alter the shape of
The hyoglossus muscle -------------------- the tongue
E. Protrude
F. Retract
G. Depress
H. Alter the shape of
The genioglossus muscle-------------------- the tongue
I. Protrude
J. Retract
K. Depress
L. Alter the shape of
The styloglossus muscle -------------------- the tongue
M. Protrude
N. Retract
O. Depress
P. Alter the shape of
There are -------------- deciduous teeth in each jaw
A. 5
B. 10
C. 15
D. 20
There are -------------- permanant teeth in each jaw
E. 8
F. 16
G. 24
H. 32
The following facts concerning the tongue are correct except which?
(a) The intrinsic muscles are innervated by the hypoglossal nerve.
(b) The posterior third of the tongue forms part of the anterior wall of the oral pharynx.
(c) Lymphoid tissue is found on the posterior third of the dorsum of the tongue.
(d) On either side of the frenulum of the tongue are situated the openings of the parotid ducts.
The following statements concerning the submandibular salivary gland are correct except which?
(a) The facial nerve passes through it
(b) The secretomotor nerve supply is derived from the facial nerve.
(c) The submandibular duct opens into the floor of the mouth.
(d) Has same parasympathetic nerve supply like sublingual gland
Which of the following muscles form the palatine aponeurosis?
(a) Tensor veli palatini
(b) Palatoglossus
(c) Palatopharyngeus
(d) Levator veli palatine
All muscles of the soft palate are innervated by pharyngeal plexus (cranial accessory nerve) except ------------
A. Levator palati muscle
B. Palatoglossus muscle
C. palatopharyngeal muscle
D. tensor palati muscle
The following statements concerning the parotid salivary gland are correct except which?
(a) The facial nerve passes through it
(b) The secretomotor nerve supply is derived from the facial nerve.
(c) The parotid duct pierces the buccinator muscle and opens into the mouth.
(d) The external carotid artery divides within its substance
Which of the following muscles elevates the soft palate during swallowing?
(a) Tensor veli palatini
(b) Palatoglossus
(c) Palatopharyngeus
(d) Levator veli palatini
(e) Salpingopharyngeus
Which of the following muscles tense the soft palate?
(a) Tensor veli palatini
(b) Palatoglossus
(c) Palatopharyngeus
(d) Levator veli palatine