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35 Cards in this Set
- Front
- Back
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Which primary tooth does not resemble any other tooth?
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Mand first primary molar
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How big are primary teeth
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Volume and enamel area are approx 1/2 the size of permanent teeth
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Which teeth are whitest, primary or permanent?
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Primary
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Which teeth have greater cervical constriction?
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Primary, bell shaped. Also have distinct buccogingival ridge, Broad, flat proximal contacts.
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Pulps of the primary molars tend to have....
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Long mesial pulpal horns that lie closer to the mesial than to the distal surfaces
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Primary max second molar is a smaller version of the
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Perm max first molar.
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Describe primary roots
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More slender and tapering, Longer in proportion to the crown than in corresponding permanent teeth, and primary molar roots diverge and bulge to envelope the developing crowns of the underlying premolars.
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Describe Pulp in primary teeth
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Pulp horns are longer and more pointed, mesiobuccal pulp horn is the most prominent. Pulps are larger, dentin is 1/2 the thickness of permanent dentition. Canal space is not readily filled when root canal therapy is indicated.
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Describe enamel rods in primary teeth
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Extend occlusally from the DEJ
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Describe Enamel in primary teeth
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Primary enamel is half the width of the enamel of corresponding permanent teeth. Primary enamel is approx 1 mm thick.
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Describe Dentin in primary teeth
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Thickness of dentin is approx half that of corresponding permanent teeth and is less dens. Dentin is cut more easily than that of permanent teeth.
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Describe Gingiva in primary mouth
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Interdental papilla is usually high and extends to the interproximal contact area.
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Explain attrition in primary teeth
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Much attrition due to thinner enamel. Primary molars show a flat occlusal table
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Is time of eruption important?
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Not unless it really deviates. Sequence is more important.
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What is rule of 4s
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every 4 months at 6-7 months you get 4 teeth.
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A fifteen month old child would normally have all of their teeth except for
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Primary canines and second molars
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Where are primate spaces?
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Mesial to max canines
Distal to mand canines |
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When should primary teeth should be in normal alignment and occlusion?
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Shortly after the age of 2, with all the roots fully formed by the time the child is 3 years old.
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Mesial Step is
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Class 1 canine
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Distal step is
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Class II canine
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Best predictor or determining factor is combining the canine with...
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The second molar relationships
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When does late mesial shift usually occur?
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When no primate spaces exist
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What happens when you get loss of primary molar at 5 years or younger?
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Delayed eruption
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Mandibular second permanent molar erupting before second premolar can result in....
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Arch length loss
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What causes molar to move into premolar space before premolar erupts?
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Mesial Force
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What are Natal teeth?
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Present at birth
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What are neonatal teeth?
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Erupt during first month of life
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What is a Riga-Fed Disease?
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Traumatic ulceration of the ventral surface of teh tongue, most commonly associated with natal and neonatal teeth in newborns
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What is gemination?
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Abortive attempt by a single tooth to bud and divide. Hereditary pattern
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What is Fusion?
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union of 2 discrete teeth. 2 roots. potential congenitally missing tooth.
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What is concresence?
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Fusion of 2 teeth along root surface. Can occur after root formation. Non-developmental defect.
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What is Turner's tooth?
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Defect associated with trauma or insult during development. Localized enamel hypoplasia-trauma or localized infection during the apposition stage of development.
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Hyperdontia is more common in the...
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Maxilla
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Hypodontial is more common in the...
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Mandible
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Do males or females get hyperdontia more often?
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Males 2:1. Mesiodens most common
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