Remineralizzazione dello smalto esposto all’azione erosiva delle bevande acide.

Objective: Aim of this in vitro study was to evaluate the effect of a calcium-phosphate based (CPP-ACP) paste in remineralisation of enamel surfaces eroded by acid soft drinks by atomic force micro- scopy (AFM). Methods: Twenty-four human caries-free central incisors were ran- domly and equally divided into four groups; teeth were exposed to the erosive action of two different acid soft drinks (Coca Cola and Gatorade) for 10 minutes twice a day for two weeks. After the second exposure, the teeth of two groups were covered with CPP-ACP paste for 10 minutes every day. Then, the samples were observed under AFM. Results: All samples revealed increased values of surface roughness after exposure to acid soft drinks. Samples treated with CPP-ACP paste showed a significative reduction of roughness values (p < 0,01). Conclusions: This study showed that acid soft drinks could erode tooth enamel surface; the use of CPP-ACP paste can enhance enamel remineralization.