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Oral Cavity Flashcards

(55 cards)

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1
Q

The dental arches subdivide oral cavity into ____

A

Vestibule and oral cavity proper

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2
Q

Vestibule contents

A

. U-shaped space located between lips/cheeks and teeth/gums
. Labial and buccal mucosa line lips/cheeks and teeth/gums
. Opening to parotid duct pierced buccinator m. And opens into vestibule opposite of M2 teeth
. Buccinator
. Orbicularis oris m.
. Gingivae

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3
Q

Oral cavity proper

A

. Space btw dental arched ant. And lat., palatoglossal folds post., palate sup., and muscular floor of mouth inf.
. Contains tongue, submandibular and sublingual glands and their ducts

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4
Q

Dental arches

A

Alveolar processes of maxilla and mandible

. House dentition

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5
Q

Deciduous dentition

A

. 1st teeth (lower central incisors) erupt at 6-8 mo
. Final teeth erupt 2024 mo
. Teeth and shed and replaced w. Adult teeth age 6-12
. 2 incisors, 1 canine, 2 molars per quadrant (20 teeth total)
. Molars important for maintaining spacing for adult dentition
. Deciduous molars replaced by adult premolars

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6
Q

Permanent dentition

A

. 1st tooth at 6 y/o
. Final teeth (3rd molars/wisdom teeth) at 1 y/o
. 2 incisors, 1 canine, 2 premolars (bicuspids), 3 molars (32 total)

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7
Q

Oral cavity cavity proper post. Boundary

A

. Palatoglossal folds border oropharyngeal isthmus

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8
Q

Oral cavity proper roof

A

. Palates covered by mucoperiosteum w/ mucous glands
. Hard palate: palatine processes of maxillary bones w/ incisive foramina ant. And horizontal plate of palatine bones w. Greater and lesser palatine foramina post.
. Soft palate: post. Extent of palate, has membranous aponeurosis, skeletal mm., and mucous membranes, continuous lat. w/ palatoglossal and palatopharyngeal arches

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9
Q

Oral cavity proper floor boundary

A

. Mylohyoid m.

. Geniohyoid m.

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10
Q

Mylohyoid OIAN

A

O: mylohyoid line
I: body of hyoid and fibers from opposite site to form median raphe
A: elevates hyoid and floor of mouth during swallowing
N: n. To mylohyoid

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11
Q

Geniohyoid m. OIAN

A

O: genial tubercle of mandible
I: body of hyoid bone
A: pulls hyoid sup.
N: Ca ventral ramus coursing w/ hypoglossal n.

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12
Q

Maxillary teeth and sinuses innervation

A

. Ant., and middle sup. Alveolar nn. Branch from infraorbital n. In infraorbital canal
. Post. Sup. Alveolar n. Splits from maxillary n. And enters infratemporal surface of maxilla

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13
Q

Maxillary labial and buccal gingivae and mucosa innervation

A

. Sup. Labial n.: branches from infraorbital n. At infraorbital foramen
. Post. Sup. Alveolar n.

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14
Q

Hard palate mucosa, palatal gingivae of maxillary dental arches innervation

A

. Nasopalatine n.: supplies ant. Palatal mucosa and gingivae, passes from nasal cavity through incisive
. Greater palatine n: supplies palatal mucosa gingivae, courses from greater palatine canal through greater palatine foramen

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15
Q

Soft palate mucosa innervation

A

. Lesser palatine n.: mucosa of soft palate, courses from greater palatine canal through greater foramen
. Branches of glossopharyngeal n.

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16
Q

Mandibular teeth innervation

A

. Inf. Alveolar n. Branches from mandibular n., courses inf. To lat. pterygoid m. And enters mandibular foramen

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17
Q

Lower lip, chin, labial gingivae and mucosa innervation

A

. Mental n.: ranches from inf. Alveolar n. W/in mandible and emerges from mental foramen
. Buccal n. (Long buccal n.)

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18
Q

Lingual gingivae and mucosa of Floor of mouth, plus mucous membranes of ant. 2/3rds of tongue innervation

A

. Lingual n. Courses lat. hyoglossus m.

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19
Q

Blood supply to maxillary teeth and sinuses

A

. Ant. And middle sup. Alveolar aa. Branch from the infraorbital a. In the infraorbital canal
. Post. Sup. Alveolar a.: splits from maxillary a. And enters infratemporal surface of maxilla

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20
Q

Hard palate, palatal gingivae, of maxillary dental arches blood supply

A

. Septal branches of sphenopalatine a. Pass from nasal cavity through incisive foramen
. Greater palatine a. Branches from descending palatine a. And courses from greater palatine canal through greater palatine foramen

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21
Q

Soft palate blood supply

A

. Lesser palatine a. Branches from descending palatine a. And courses from greater palatine canal through greater palatine foramen

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22
Q

Mandibular teeth blood supply

A

. Inf. Alveolar a. Branches from maxillary a. And courses inf. To the lat. pterygoid m. To enter mandibular foramen

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23
Q

Lower lip, chin, and labial gingivae and mucosa blood supply

Study These Flashcards
A

. Mental a. Branches from inf. Alveolar a. W/in mandible and emerges from mental foramen

24
Q

Lingual gingivae and floor of mouth and tongue blood supply

Study These Flashcards
A

. Lingual a. Branches from ECA and courses deep to hyoglossus m. To give rise to several branches

25
Buccal gingivae and mucosa of vestibule blood supply
. Facial a. And labial branches supply check and lips, buccinator and orbicularis oris mm., and buccal and labial mucosa fo cheeks
26
Dorsal surface of tongue
. Sulcus terminalis: V-shaped groove dividing tongue into ant. Oral surface and post. Pharyngeal surface . Oral surface w/ lingual papillae . Pharyngeal surface w. Scatter taste buds and lingual tonsils
27
Oral surface papillae
. Filiform: general sensory but no taste buds, mechanical purpose to inc. SA of tongue, draw food to esophagus, and distribution saliva . Fungiform: have taste buds, pink spots . Vallate: large, flat, just ant. To sulcus terminalis, has taste buds . Foliate: small lat. folds of lingual mucosa on tongue sides, has taste buds
28
Foramen caecum
. At apex of sulcus terminalis . Site of origin of thyroid gland . On pharyngeal surface of tongue
29
Ventral surface of tongue
. Frenulum . Sublingual caruncle: where submandibular duct opens . Sublingual fold: fold of mucous membrane containing opening of sublingual ducts
30
Intrinsic mm. Of tongue
. All arise from midline septum and intertwine each other . Innervated by CN XII . Change shape of tongue . Divided into sup. And inf. Longitudinal, vertical, and transverse groups
31
Extrinsic muscles of tongue
. Intertwine w. Intrinsic mm. . Change position of tongue . All innervated by CN XII except palatoglossus that is innervated by vagus n. And pharyngeal plexus
32
Palatoglossus mm. OIA
O: Palatine aponeurosis of soft palate I: Side of tongue A: Elevates the tongue and narrows the oropharyngeal isthmus
33
Styloglossus OIA
O: Styloid process and stylohyoid ligament I: Side of the tongue A: Retracts the tongue and draws the sides up
34
Hyoglossus m. OIA
O: Body and greater horn of hyoid bone I: Side of the tongue A: Depresses and retracts the tongue; it also acts on hyoid bone
35
Genioglossus m. OIA
O: Genial tubercle I: Along the length of the dorsum of the tongue and hyoid bone A: Depresses tongue; posterior part pulls tongue anteriorly
36
General sensory innervation to tongue
. Lingual n. To ant. 2/3 . Glossopharyngeal n. To post. 1/3 . Internal laryngeal n. To root of tongue
37
Special sensory to tongue innervation
. Chordatympani (facial n.) from ant. 2/3 . Glossopharyngeal from post. 1/3 . Vagus n. Branches from root of tongue, epiglottis, and palate
38
Blood supply to tongue
. Lingual a. Courses deep to hyoglossus m.
39
Palatal mucous glands innervation
. Parasympathetic: pre-ganglionic fibers from greater petrosal n. Synapse in pterygopalatine ganglion, postganglionic follow V2 branches to mucous glands . SNS: postganglionic fibers from sup. Cervical ganglion and travel w/ blood vessels to oral cavity
40
Parotid gland location and innervation
. Largest salivary gland . Ant. To external eat and superficial to masseter . PNS: preganglionic w/ lesser petrosal n. And synapse at otic ganglion, postganglionic fibers then travel w/ auriculotemporal n. . SNS: postganglionic fibers from sup. Cervical ganglion and course w/ blood vessels to reach gland
41
Parotid duct
. Courses across ant. Border of masseter m. And pierces buccinator . Opens into vestibule of mouth near upper M2
42
Submandibular gland location and innervation
. Submandibular triangle along post. Edge of mylohyoid m. Superficial to hyoglossus m., partially wraps around mylohyoid. . PNS: preganglionic from chorda tympani course w/ lingual n., synapse in submandibular ganglion, the postganglionic fibers w/ distal lingual n. To gland . SNS: postganglionic from sup. Cervical ganglionic course on lingual a. To gland
43
Submandibular/Wharton’s duct
. On medial deep surface of gland between mylohyoid m. Lat. and hyoglossus and genioglossus mm. Med. . Crosses lingual n. Sup. Before opening into mouth at sublingual caruncle
44
Sublingual gland
. Almond-shaped, located just inf. To sublingual fold deep to mucous lining of mouth . Sublingual ducts: open into mouth along sublingual fold . Visceral motor innervation is same as submandibular gland
45
What nodes drain the area supplied by facial and lingual aa.?
. Superficial cervical . Submandibular . Submental
46
Deep cervical lymph nodes
. Located along internal jugular v. . Run from clavicle to base of skull . Receive lymph from superficial nodes and tongue
47
Tongue lymphatics
. Post. 1/3 drains bilaterally to sup. Deep cervical lymph nodes . Tip and central regions of tongue drain bilaterally but to lesser extent, drain into submandibular, submental, and inf. Deep cervical lymph nodes
48
Lymphatic spread fo intraoral carcinoma
. Involves first uppermost, then middle, then lower deep dervical nodes . Cross drainage btw R and L sides is common . Tumor size and extent of metastatic spread are best indicators of patient prognosis
49
HPV 16
. Leading cause of oropharyngeal cancers | . Also assoc. w/ cancers of cervix penis and anus
50
What week does palate form by?
. Week 10 | . Separates nasal and oral cavities
51
Development of primary palate
. Derives from intermaxillary segment (arch 1) along w/ upper lip and maxillary incisors . Intermaxillary segment forms median palatal process projection that becomes primary palate . Segment is continuos w/ rostral part of nasal septum that arises from frontonasal prominence
52
Development of secondary palate
. Derived from paired maxillary prominences (arch 1) . Week 6: prominences develop med. projecting palatine shelves that grow into primitive nasal/oral cavity on either elide of tongue . Week 7: mandible grows down and out and pulls tongue w/ it permitting palatine shelve to rotate into horizontal plane and grow to one another to fuse at midline . Also fuse to nasal septum sup. That arises from frontonasal prominence and cartilages of basicranium
53
Cleft palate prevalence
1/700 births | . Most common in native Americans and people of East Asian ancestry
54
Anterior cleft lip and palate anomalies
. Involve upper lip and primary palate . If severe is can extend from lip into nostril . May result from mesenchyme deficiency in maxillary prominences and intermaxillary segment
55
Posterior cleft palate anomalies
. Involves secondary hard palate and/or soft palate | . May result from defective development of secondary palate and growth distortions in last. Palatine processes

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