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43 Cards in this Set
- Front
- Back
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What is Turner Tooth/Turner's Spots?
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Periapical inflammatory disease of overlying deciduous tooth. Enamel defects from white, yellow or brown discoloration to extensive hypoplastia. Commonly in biscuspid area due to proximity to molars.
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What is Eruption?
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Movement of teeth through bone and overlaying mucosa of the jaw to appear in teh oral cavity and reach occlusal plane. It is a Continuous process, even into Adulthood
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Crown complete, root starts to form=
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Tooth Eruption
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What the three phases in tooth eruption?
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Pre-eruptive, Eruptive, and Functional.
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What happens during the pre-eruptive phase?
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From initiation of crown formation and completion to early root formation. Total bodily and eccentric movement.
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What happens during Eruptive Phase?
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Ends with tooth reaching the occlusal plane. Continual remodeling of the PDL to accommodate tooth movement. Formation of a junctional epithelium and gingiva. 4 stages: Root formation, movement, penetration, adn occlusal contact.
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What happens during the Functional (post-eruptive) Phase?
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Begins when the tooth reaches the oral cavity. Accommodates jaw growth and parafunctional habits wear.
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What are the 4 stages of Eruptive Tooth Movement?
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Root Formation
Movement Penetration of Tooth's crown tip through the fused epithelial layers 4. Intraoral incisal or occlusal movement of the erupting tooth. |
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What is Root formation?
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Proliferation of epithelial root sheath. Initiation of root dentin and pulp. Increase in fibrous tissue of the follicle.
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What takes place in the 4 stages of eruptive tooth movement.
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Allows the roots to form. Reduced enamel epithelium fuses and contacts the oral epithelium.
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What happens when the tooth crown tip penetrates?
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Eruption of tooth into the oral cavity. Junctional Epithelium.
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What does Intraoral incisal or occlusal movement of the erupting tooth allow?
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Occlusal contact with opposing tooth.
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What are 3 types of post eruptive tooth movement?
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To accommodate the growing jaws (Formation of new bone at alveolar crest adn base of socket to keep pace with increasing height of jaws.)
To compensate for continued occlusal wear (Cementum around apex of tooth To accommodate interproximal wear. (Mesial Drift) |
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What are the steps of movement to accommodate interproximal wear?
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1. Contraction of the transseptal fibers.
2. Adaptability of bone tissue 3. Anterior component of occlusal force 4. Pressure from soft tissue. |
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In a patient who is growing normally, the amount of tooth eruption after the teeth have come into occlusion equals what?
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The vertical growth of the ramus.
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How do mandibular and maxillary teeth divide the vertical space between the jaw?
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Equally
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What are 6 theories of how eruption occurs?
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1. Vascular pressure and blood vessel thrust
2. Pulpal pressure and pulpal growth 3. Traction by periodontal fibroblasts 4. Root Formation 5. Bone Remodeling 6. Dental Follicle. |
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Are rates of bone resorption and Tooth Eruption under the same control?
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No. Seperate
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Which is the Rate limiting factor, Resorption or Eruption?
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Resorption. When the Root formation begins, the resorption of coronal structures occurs, which leads to eruption.
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What happens if eruption is mechanically blocked?
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May result in resorption of the root or dilaceration
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When is the eruption of Primary Teeth?
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6 months-2years
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Give the order of eruption of primary teeth.
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Mandibular centrals, Max Centrals
Mand Laterals Max Laterals Mand then max 1st molars Mand then max canines Mand then max 2nd molars |
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What is the rule of 4?
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Eruption of four (primary) teeth every four months beginning with 4 teeth at seven months.
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When do crowns begin to form and when do they complete?
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4-6 months in utero, completed at 10 months after initiation.
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Root formation takes place when?
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During eruption process after crown completion. Roots complete about 1.5-3 years after emergence. According to D. Deck, root is completely formed within 1 year of tooth eruption into mouth.
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Where does Resorption of the primary tooth occur?
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At the apex due to pressure of succedaneous dental follicle.
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What follows exfoliation of primary tooth?
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Emergence of succedaneous tooth.
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Mnd teeth erupt before MX in permanent dentition except in _________
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U5>L5
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A quiescent period of 1-1.5 years occurs between eruption of ____________
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Between 6s and incisors and eruption of 3-5's
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Anterior to posterior eruption in permanent except for
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U4, 3, 5 or U4, 5, 3.
L3, 4, 5 or L4, 3, 5 |
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When do secondary crowns begin to form/calfify?
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At birth for 6s, and through 8-10 years for 8s.
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When do crowns reach complete calicifaction?
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about 3 to 4+ years prior to eruption.
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When do roots complete?
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About 3 years after emergence. Active eruption of teeth occurs after one-half of the root is formed.
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WHat is the deciduous primary period?
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8 (6-10) mos to 6 years-only primary teeth
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What is the Mixed (Transitional) period?
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6 yrs to 12 yrs both primary and permanent teeth
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What is the Permanent Period?
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After 12 yrs: only permanent dentition.
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The rules of "fours" for permanent tooth (3rd molars not included)
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At birth 4 1st molars have initiated calcification. At 4 years of age, all crowns have initiated calcification. At 8 years, all crowns are completed at 12 years, all crowns emerge, at 16 years, all roots are complete.
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What is leeway Space?
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The extra space of "de"> "34"
5 mm per mandibular arch 3 mm per maxillary arch To be used judiciously at growth spurt to help.minimize/resolve crowding. -Flared roots of primary molars resists the mesial displacement of erupting 6s. |
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What do teh primate spaces do?
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For proper alignment of permanent incisors and canines.
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Who's teeth usually erupt first, girls or boys?
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Girls.
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Who many teeth do you see during the quiescent period in a child?
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24
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What is the Angle Class 1 relationship?
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The alignment of the mesiobuccal cusp of the permanent maxillary 1st molar with the mesiobuccal groove of the permanent mandibular 1st molar.
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The mandibular right primary central incisor contacts the following teeth in in occlusion in an ideal situation?
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Maxillary right primary central incisor
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