Fig 1.
Modified tooth wear measurement index.
A—upper dental arch; B—lower dental arch; 0—absence of wear; 1—enamel wear only; 2—dentin wear, with the occlusal/incisal face showing more enamel than dentin; 3—dentin wear, with the occlusal/incisal face showing more dentin than enamel; 4—advanced wear stage, near or with pulp exposure.
Table 1.
Sample size (n), mean and range of tooth wear and age of riverine groups, indigenous (Assurini, Xicrin-Kaiapó and Arara) and urban (Belém, Pará).
Fig 2.
Association between tooth wear and age for the riverine population.
Linear regression was statistically significant (p <0.001), explaining 55% of age variability in this group. *p<0.05.