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55 Cards in this Set
- Front
- Back
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What are the three developmental periods of tooth formation?
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Growth, Caclification, Eruption
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Dental development usually begins when?
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in the 5th or 6th week of prenatal life
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What are the three stages in the growth period of development?
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bud, cap, and bell stages
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When do the tooth buds for permanent teeth form?
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between the 17th week of fetal life through the age of 5 years.
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Cap stage is also known as?
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Proliferation
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Bell stage is the last period of growth also known as?
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Histodifferentiation
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What is morphodifferentiation?
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enamel forming cells (ameloblast) and dentin forming cells (odontoblast)
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What is Apposition?
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refers to the depositing of the matrix for the hard dental structures
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What is Calcification?
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the process by which organic tissue becomes hardened by a deposit of calciuim or any mineral salts.
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What is Eruption?
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three years from crown completion to the time the tooth emerges in the mouth.
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What is Exfoliation?
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(shedding) when primary teeth prepare to fall out and make way for the eruption of permanent teeth.
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What is Oral Histology?
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desribes in detail the tissues of the teeth, periodontium, and the surrounding oral mucosa
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What makes up the structure of teeth?
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The crown and one or more roots
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What are the two types of crown?
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Anatomic and Clinical
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What is Furcation?
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the region where roots seperate.
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What is bifurcated?
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a tooth that has two roots
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What is trifurcated?
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a tooth that has three roots
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What is multi-rooted?
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a tooth that has four or more roots
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What what color is Enamel?
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translucent and can vary in color from yellowish to grayish white
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What is Enamel?
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the hardest tissue in the body.
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What is Enamel made of?
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Calcium and phosphorus
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How much pressure can Enamel endure?
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approximately 100,00psi
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T or F: After formation enamel has no power of further growth or repair?
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True
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What color is Dentin?
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light yellow
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What constitutes the the largest portion of the tooth?
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Dentin
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T or F: Dentin has the ability for growth and repair.
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True
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What color is Cementum?
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light yellow
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What is the main function of Cementum?
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anchor the teeth to the bony walls of the tooth sockets in the periodontium.
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What is the chief function of Dental Pulp?
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the formation of dentin
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What is the color of healthy gingiva?
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pale pink to darker shades- purpler to black.
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What are the two types of gingiva?
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attached and unattached
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What is the "meat between the teeth" called?
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Interdental Papilla
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What are the three dentition periods?
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primary, permanent, mixed
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What are the teeth of the upper arch called?
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Maxillary teeth
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what are the teeth of the lower arch?
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mandibular teeth
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What do incisors do?
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cut
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What do cuspids do?
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cut and tear
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What do bicuspids do?
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cut, tear, crush
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What do Molars do?
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grinding and chewing solid masses of food
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What is the Universal Numbering System?
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a simplified method of identifying teeth that is approved by the American Dental Association and used by the armed services.
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What letters are the 20 primary teeth identified with?
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A through T
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What is the facial surface of a tooth?
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the surface that faces toward the lips or cheeks
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What is the mesial surface of a tooth?
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the proximal surface closest to the midline or middle of the arch
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What is the distal surface of a tooth?
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oriented away from the midline of the arch.
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What is the labial surface of a tooth?
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the surface of an anterior tooth that faces toward the lips.
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What is the lingual surface of a tooth?
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the surface of an anterior or posterior tooth that faces toward the tongue.
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What is the contact point?
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the point on the proximal surface where two adjacent teeth actually touch eachother.
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What is the inter-proximal space?
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the are between the teeth.
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The part of the inter-proximal space not occupied by the interdental papilla?
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the embrasure
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What is the are between the teeth if there is no contact point?
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diastema, instead of embrasure.
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What is a cusp?
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a pointed or rounded elevation of enamel found on cuspids and on the chewing surfaces of bicuspids and molars.
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What is a fissure?
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a linear fault that sometimes occurs in a devlopmental groove
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What is a pit?
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usually found at the end of a developmental groove or a place where two fissures intersect.
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What is a fossa?
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A rounded or angular depression
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Whiat is a groove?
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a small linear depression on the surface of a tooth.
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