2 TOOTH WEAR Definition: ‘Tooth wear is defined as loss of tooth tissue due to causes other than caries’Types:Physiological ( occurs with age)Pathological ( excessive tooth wear)Three types have been described,AttritionAbrasionErosion
4 ATTRITION Definition: Attrition is tooth wear caused by tooth-to-tooth contactOccurs as a normal part of aging and it is usually the incisal edges which wear away first, followed by the occlusal surfaces of molar teethExcessive occlusal wear may occur in the following situations:Patients with Bruxism ( excessive grinding of teeth by patients)Patients who have lost several posterior teeth may show excessive attrition of the anterior teeth, especially if these are used for chewingPatients who suffer from developmental disturbances of tooth structure, such as Amelogenesis and Dentinogenesis Imperfecta
6 ABRASION Definition: Causes: It is always pathological Abrasion is frictional tooth loss caused by extrinsic agentsCauses:It is always pathologicaland may be caused byTooth brushingBiting on a pipe or a pencilTooth brush abrasion is caused by poor tooth brushing technique
7 Characteristics of abrasion It has following characteristics:Particularly affects the labial and buccal surfaces of the maxillary incisor, canine and premolar teethResulting cavity is wedge-shapedThe problem is often compounded by the use of hard tooth brushes and abrasive toothpaste
9 EROSIONErosion is the loss of tooth substance caused by chemical agents and is non-bacterial and therefore does not include loss by cariesMost erosion is caused by acids and is seen in following groups:Those with gastric reflux and with bulimia and anorexia. Regurgitation of acid from the stomach particularly affects the palatal surfaces of the maxillary teeth
10 EROSION 2. As an occupational hazard: Those who work in an acidic environment e.g in factories making batteriesErosion in these groups is relatively rare but because the acid is in the environment the erosion is particularly seen on the labial surfaces of both upper and lower incisor teeth3. Those who consume excessive amounts of carbonated soft drinks or fruit juices. The teeth which are most commonly affected are the palatal surfaces of the upper anterior teeth. Teeth may appear yellow due to reduction in the thickness of enamel. Typically cavities are shallow and broad
13 TREATMENT Diagnose the most likely cause In many cases the causes may be multipleAbrasion caused by tooth brushing may be reduced by improving brushing techniqueA careful history and detailed notes on the position of erosion are important in order to determine the exact causeDietary analysis and advice are essential for those suffering from erosion due to dietary causes
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