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Table 1 Prevalence of occlusal/incisal tooth wear and non-occlusal/non-incisal tooth wear in permanent and deciduous teeth

From: Association of dietary habits and parental-reported sleep tooth grinding with tooth wear in children with mixed dentition

Occlusal/Incisal Tooth Wear
Grading Scale Number of teeth with tooth wear (%)
Permanent teeth (n = 637)a
 0 575 (90.3)
 1a 59 (9.3)
 1b 1 (0.1)
 1c 0 (0)
 2 2 (0.3)
 3a 0 (0)
 3b 0 (0)
 4 0 (0)
Deciduous teeth (n = 291)b
 0 126 (43.3)
 1 132 (45.4)
 2 27 (9.3)
 3 6 (2.1)
 4 0 (0)
Non-occlusal/Non-Incisal tooth wear
Grading scale25 Number of teeth with tooth wear (%)
Permanent teeth (n = 430)c
 0 400 (93.0)
 1 29 (6.7)
 2 1 (0.2)
Deciduous teeth (n = 279)c
 0 234 (83.8)
 1 34 (12.1)
 2 11 (3.9)
  1. aOcclusal/Incisal tooth wear in permanent teeth: 0 = no wear; 1a = minimal wear within the enamel of cusps or incisal tips; 1b = Facets within the enamel parallel to the normal planes or contour; 1c = Noticeable flattening of cusps or incisal edges within the enamel; 2 = Wear with dentine exposure and loss of clinical crown high <1/3; 3a = Wear with dentine exposure and loss of clinical crown high of 1/3 – ½; 3b = Wear with dentine exposure and loss of clinical crown of ½- 2/3 and 4 = Wear with dentine exposure and loss of clinical crown of >2/3
  2. bOcclusal/Incisal tooth wear in deciduous teeth: 0 = no wear; 1 = visible wear within the enamel; 2 = visible wear with dentin exposure and loss of clinical crown height of ≤1⁄3; 3 = loss of crown height > 1⁄3 but <2⁄3; and 4 = loss of crown height ≥ 2⁄3
  3. cNon-Occlusal/Non-Incisal tooth wear in permanent and deciduous teeth: 0 = No wear; 1 = Wear confined to the enamel; 2 = Wear into the dentine