Term
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Definition
- the main componet of the crystalline formation in mature enamel
- chemical formula: Ca10(PO4)6(OH)2
- simular to what is found in lesser %s in bone, dentin and cementum
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Term
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Definition
- hardest calcified tissue in the human body
- avascular wih no nerves
- a crystalline formationof mainly calcium hydroxyapate
- other minerals such as carbonate, magnesium,potassium, sodium, and fluoride are also present in smaller amounts
- 96% inorganic, 1% organic, 3% water
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Term
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Definition
- the process of enamel formation that occurs during the apposition stage of tooth development
- accurs in two waves
- first wave- enamel matrix is first formed in the incisal/occlusal portion of the future crown.
- second wave- over laps the first wave, entire process then moves cervically to the CEJ
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Term
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Definition
- columnar cell
- differentiate during the apposistion stage in the crown area
- produce enamel matrix
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Term
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Definition
- the secretory surface of teh ameloblast that faces the DEJ
- secretes enamel matrix
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Term
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Definition
- wearing away of hard tissue as a result of tooth-to-tooth contact
- increases with age
- permanent 1st molars wear more than seconds, seconds more than thirds
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Term
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Definition
- mechanical wear
- enamel loss caused by excessive tootbrushing or abrasive tooth paste
- usually on facial cervical areas
- lesions are more wide than deep
- canines often affected due to their postion in the arch
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Term
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Definition
- enamel loss through chemical means
- process by which is cavity is created through demineralization
- due to acid
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Term
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Definition
- loss of enamel through tensile and compressive forces during tooth flexure (parafunctional habits)
- can affect both the facial and lingual cervical areas
- consists of cervical lesions that cannot be attributed to any particular cause
- enamal pops off starting at cervial region exposign the area to further wear, dentin hypersensitivity or caries
- deep, narrow V shaped notch
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Term
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Definition
- loss of enamel through chemical means
- caused by acids NOT involving bacteria- eg vomit, gastric reflux, soft/sports drinks
- broad concavities within smooth surface enamel
- cupping of occlusal surfaces with dentin
- yellow underlying dentin is exposed and can undergo attrition bc it is less mineralized than enamel
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Term
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Definition
- process of dentin matrix, or pre-dentin formation
- occurs during the apposition stage of tooth development
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Term
| imbrication lines of von Ebner |
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Definition
- microscopic feature of dentin
- incremental lines or bands that stain darkly
- show the incremental nature of dentin apposition
- run at right angles to the dentinal tubules
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Term
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Definition
- microscopic feature of dentin
- a number of adjoining parallel inbrication lines
- demonstrate a disturbance in the body metabolism that affects the odontoblasts by altering their formation efforts
- appear as a series of dark bands
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Term
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Definition
- microscopic feature of dentin
- most pronounced contour line
- occurs during the trauma of birth
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Term
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Definition
- microscopic contour lines
- the antibiotic becomes permanently and chemically bound to the dentin
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Term
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Definition
- innermost tissue of the tooth
- a connective tissue that forms from the central cells of the dental papilla of the tooth germ
involved in - support
- maintenance
- pain perception
- continued formation of dentin- inner layer of the cell bodies of odontoblasts remain along the outer pulpal wall
- nutritional functions for dentin- bc dentin has no blood supply of its own
- protective functions due to its involvement in the formation of secondary dentin, which increases pulp coverage
- contains WBCs- allows triggering of inflammatory and immune response
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