Dental Block 1 Flashcards
What is the vermillion border a junction between?
What type of cells is it made of?
Skin and Mucous membranes
Stratified squamous
What type of glands are located in the vermillion border?
Fordyce Granules- Ectopic sebaceous glands at corners of the mouth and cheeks opposite molar teeth
What are the characteristics of the Masicatory Mucosa
25%, Gingiva covering hard palate, primary mucosa in contact w/ food during chewing,
Keratinized
What are the characteristics of the Lining Mucosa
60%, floor of mouth, ventral tongue, and tissues of soft palate with no function during mastication,
Non-keratinized
What are the characteristics of Specialized Mucosa?
15%, covers dorsal tongue
Non/cornified papillae
How does the Lamina Propria differ between the Lining and Masticatory Mucoasa?
Lining- NKSS loose CT w/ collagen, contains glands
Masticatory- P/KSS, variable lamina propria, para/kartinized strat squamous
Gingiva belongs to what category of mucosa?
What are the 3 parts of the gingiva?
Masticatory
Attached, Interdental, Free (includes sulcus)
Characteristics of Attached Gingiva
Keratinized, stippled, separated from aveolar mucosa by mucogingival groove, attached to tooth by junction of epithelium
Characteristics of Marginal/Free Gingiva
Keratinized, not stippled, bound on inner margin by gingival sulcus (separate from tooth), bound to outer margin by oral cavity and apically by free gingival groove
How does gingiva attach to teeth?
Attach on neck of tooth by junctional epithelium
What type of muscle makes the tongue?
What divides it into halves?
What are the three parts and two surfaces of the tongue?
Striated
Median septum
Parts: oral, pharyngeal, root
Surface: dorsal, ventral
What is the most important articulator for speech production?
What is a second function of the tongue?
Tongue
Taste
Where are bitter, sour, salty and sweet tastes located on the anterior 2/3s of the tongue?
Bitter- posterior surface
Sour- inner middle
Salty- peripheral except tip
Sweet- tip
What are the four types of papillae on the tongue?
Filiform- anterior 2/3, fine hair-like
Fungiform- anterior 2/3, round red spots
Circumvallate- V shaped row near posterior
Foliate- posterior lateral border of the tongue
There are no taste buds on the posterior 1/3 of tongue, but what is located there?
What is the most numerous type of papillae?
Nodular surface due to lingual tonsils
Filliform, lack any taste buds
What CN innervates the general/taste sensations of the anterior 2/3 of tongue?
Sensation- lingual nerve, CN5 general sensory
Taste- chorda tympani, CN7 special sensory
What CN innervates the general/taste sensations of the posterior 1/3 of tongue?
Glossopharyngeal nerve- CN9, general and special
What CN innervates the generals sensation at the base of the tongue?
Internal laryngeal nerve- CN10
What types of muscle fibers make up the intrinsic tongue muscles and what is their function?
Longitudinal, Transverse, Vertical
Alter shape of tongue
What are the four extrinsic muscles of the tongue?
What is their function?
Palatoglossus, Genioglossus, Hypoglossus, Styloglossus
Tongue movement, connect tongue to surrounding structures: soft palate/bones (mandible, hyoid, styloid)
What are the functions of the extrinsic muscles?
Tongue movement
Connect tongue to surrounding structures: soft palate and bones (mandible, hyoid, styloid)
What muscle is responsible for tongue protrusion?
What muscle is responsible for tongue retraction?
What muscle is responsible for tongue depression?
What muscle is responsible for tongue elevation?
Genioglossus
Styloglossus
Hyoglossus and Genioglossus
Styloglossus and Palatoglossus
What nerve innervates the intrinsic nerves?
What nerve innervates the extrinsic muscles?
Hypoglossal
Hypoglossal EXCEPT the palatoglossus muscle- supplied by CN10
What artery and vein supply the tongue/mouth?
Artery: Dorsal lingual artery
Vein: Lingual Vein- drains to internal jugular