Читать книгу Handbook of Oral Pathology and Oral Medicine - S. R. Prabhu - Страница 159

 Attrition:Deciduous and permanent dentitions are affectedIncisal and occlusal surfaces are commonly affected and rarely the entire dentition may be involved (Figure 4.1a)Other teeth may include lingual surfaces of the maxillary anterior teeth and labial surfaces of the lower anterior teethFlat large wear facets corresponding to the pattern of occlusion are commonly seenInterproximal contact points are also affectedUsually asymptomaticAttrition is a slow processDental pulp is usually protected by reactionary dentin and dentinal tubular sclerosisFigure 4.1 (a) Generalized attrition of the incisal and occlusal surfaces. (b) Abrasion of the labial surfaces of maxillary canine and premolars. (c) Erosion of the palatal surfaces in a patient with bulimia(Source: by kind permission of Associate Professor N. Narayana, UNMC Nebraska, USA.)

  Abrasion:Incisal and occlusal wear is related to abrasive dietCervical wear of posterior teeth is related to faulty brushing techniquesA horizontal V‐shaped groove is commonly seen at the cervical margin of teeth in those who brush teeth vigorously or use abrasive dentifrice (Figure 4.1b)V‐shaped notches on the incisal edges of anterior teeth are seen in those who use pipes or bobby pins, and in thread bitingAbrasion of the interproximal surfaces is seen in those who use dental floss or toothpicks inappropriately

 Erosion:Palatal, occlusal, and labial surfaces of maxillary teeth are commonly affectedCommon among those with bulimia and gastroesophageal reflux disease (Figure 4.1c)Concave facets on palatal and buccal surfaces are seenCusps are dimpledIncisal labial enamel is seen with thin, sharp, and translucent ridgeDentinal hypersensitivity is common

 Abfraction:Wedge‐shaped deep defects limited to cervical area like those of abrasionOccasionally subgingival defectsFacial surfaces of premolars and molars are involved