Dental and Orofacial Anatomy Final Exam Review ( weeks 10-17) Questions & Answers Rated 100% Correct!!
the 4 tissues of the teeth Answer- enamel, dentin, pulp, cementum
the 3 hard tissues of the teeth Answer- enamel, dentin, cementum
the soft tissue of the teeth Answer- pulp
enamel Answer- hard, outermost layer of a tooth
what is enamel made up of? Answer- 96% inorganic material and 4% organic material and water
function of enamel Answer- This dense mineralization gives enamel the ability to resist the wear the crown of a tooth is subjected to
true or false: enamel has a self cleaning ability? Answer- true, due to it's smoothness
Dentin Answer- Dense tissue forming the bulk of a tooth.
What is dentin made of? Answer- 70% inorganic matter (calcium/phosphorous) and 30% organic matter + water
Where is dentin located? Answer- Under the enamel and cementum
secondary dentin Answer- Dentin that forms after eruption and continues at a very slow rate throughout the life of the tooth.
reparative dentin Answer- Localized formation of dentin in response to local trauma, such as occlusal trauma or caries.
Odontoblasts Answer- Cells that form dentin
Cementum Answer- Specialized, calcified (bone-like) connective tissue that covers the anatomic root of a tooth.
what is cementum made up of? Answer- 45% inorganic and 55% organic function of cementum Answer- to serve as an attachment for supportive fibers of the
periodontal membrane
what are the two types of cementum? Answer- acellular and cellular
Cellular cementum Answer- Apical 1/3
(think that the cells are down where the blood supply is coming from) and can reproduce itself
Acellular cementum Answer- covers most of the anatomic root, cells that produce cementum are called cemetoblasts
where does nutrition for cementum come from? Answer- derived from outside the tooth through blood vessels coming directly from bone
Cementoblasts Answer- Cells that form cementum
what is the pulp made up of? Answer- blood vessels, lymph vessels, connective tissue, nerve tissues and dentin forming cells (odontoblasts)
Pulp Answer- soft tissue within a tooth, containing nerves and blood vessels
function of pulp Answer- to form and supply nutrients to dentin and transmit sensory stimuli
anatomy of the root of the tooth Answer- Root concavities Answer- Indentations on the root surface
what tooth is least likely to have proximal root concavities? Answer- maxillary central incisor
Incisors Answer- anterior teeth that are designed to cut food & the lingual surface is shovels shaped to guide food into the mouth
canines Answer- anterior teeth that are designed to hold or grasp food
design of canines Answer- length and thickness of canines protects the jaw joint during side jaw movements
what are the longest teeth in the human dentition? Answer- canines
premolars Answer- posterior teeth that are designed to hold and grind food, pointed buccal cusps hold the food and the lingual cusps grind it
molars Answer- posterior teeth that are designed to chew/grid food, cusps are designed to interlock the upper and lower molars
what are the largest teeth Answer- molars
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