Four major types of tooth wear....
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Table. The four major types of tooth wear.
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Term
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Definition
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Clinical features
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Erosion
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Loss of tooth structure by chemical process that does not involve bacteria
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Cupping of occlusal surfaces of teeth; broad concavities within smooth surface enamel; increased incisal translucency ; hypersensitivity; pulpal exposure in primary teeth; wear on non-occlusal surfaces; raised amalgam restorations; loss of surface characteristic of enamel in young children; clean, nontarnished appearance of enamel; preservation of enamel cuff in gingival crevice
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Attrition
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Surface wear on tooth or restoration caused by tooth-to-tooth contact during mastication or parafunction
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Matching wear on occluding surface; shiny facets on enamel contact; enamel and dentin wear at the same time; possible fracture of the cusps and restorations
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Abrasion
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Loss of dental tissues caused by abrasion from foreign substances (for example, toothbrushes, dentrifices)
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Usually seen in cervical areas of teeth; lesions are wider than they are deep; premolars and canines are commonly affected
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Abfraction
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Loss of tooth surface at the cervical areas of teeth caused by tensile and compressive forces during tooth flexure (some researchers dispute whether abfraction actually exists, claiming that engineering models used to study this phenomenon failed to account for the cushioning effect of alveolar bone and periodontium)
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Affects buccal/labial cervical areas of teeth; deep, narrow V-shaped notch; commonly affects single teeth with excursive interferences or eccentric occlusal loads
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www.agd.org General Dentistry September/October 2009 521
Categories:
Dental Health
08:08:19 | 
