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16 Cards in this Set
- Front
- Back
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What is GEMINATION?
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Single tooth germ trying to form two crowns
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What is FUSION?
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Union of two normally separated tooth germs
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What is CONCRECENCE?
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Fusion of of tooth after root formation
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What is DILACERATION:?
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Refers to angulatioin, or sharp bend or curve in root or crown of a formed tooth
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Where can dilaceration occur?
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It could occur at the coronal,
middle or apical third of the root |
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What is Taurodontism?
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body of the tooth is enlarged at the expense of the root.
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Types of DGI?
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Type 1: related to osteogenesis imperfecta
Type 2: DGI without OGI Type 3: Large pulp due to ineffective dentine formation |
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DENTICLES PULP STONE if exist is found in where?
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apical third of the roots
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Pulp stone are classification?
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True denticles: resemble dentine
False denticles: not resemble dentine Diffuse calcification:irregular calcific deposits |
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Krasner and Rankow's laws regarding Location of canal orifice?
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1. Law of symmetry
2. Law of orifices location 3. Law of color change |
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Law of symmetry applies to all teeth except?
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upper molars
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Law of color change states:
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that pulp chamber floor is darker than the walls
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Law of orifices location
The orifices of the root canals are always located at the: |
junction of the walls and the floor
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Schilder's Five design objectives?
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1 Continuously tapering funnel
2 narrower X sectional diameter 3 RC Prep should follow the shape of the original canal 4 Apical foramen remain at the original position 5 Apical opening kept small |
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Schilder's Four biological objectives?
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1. Confine all instrumentation within the root canal
2. Avoid forcing necrotic debris beyond the foramen 3. Remove all tissue from the root canal space 4. Create sufficient space for intra-canal medicaments |
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Fish's zones of infection?
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1. Zone of infection- in this zone bacteria is present and is
characterized by the presence of PMN 2. Zone of contamination- containing inflammatory cells but no bacteria 3. Zone of irritation- contained histocytes and osteoclasts 4. Zone of stimulation- contained mostly fibroblasts, capillary buds, and osteoblasts. |
