The Effect of Two Acidic Time Exposure Followed by Remineralization Process on Roughness of Dental Ename

Objective: The objective of the study was to assess the surface roughness of dental enamel and morphological effects produced in vitro by two acidic time exposure followed by remineralization process on enamel. Materials and Methods: Samples of 120 sound human mandibular first premolars, extracted for orthodontic reasonfrom patients (18-25) years old were used in this study, the samples collected from Al-Noor dental center in Mosul city/ Iraq. The samples were randomly divided into six groups as follows: (A) artificial saliva exposing (control –ve), (B) Miranda exposing then managed by artificial saliva (control +ve) while the other four groups were demineralized by Miranda for 3 and 7 days, then the samples treated by four different dentifrices, all samples tested by rough-meter analysis and stereo-light microscope. Results: fluoridated dentifrices and artificial saliva exhibited a surface roughnesssignificantly at P < 0.05 than other samples. SnF2 dentifrice showed better and higher acid resistant than other types of dentifrice while Miranda inhibited the enamel surface roughness of teeth dental enamel. Conclusions: The current study demonstrated the benefits of fluoridated dentifrices and artificial saliva in lowering the surface roughness of the previously demineralized enamel. On the other hand, increase exposure time to Miranda as soft acidic drink led to more erosion of the enamelsurface of the teeth.