Aim: The aim of this study is to evaluate the effect of three treatment modalities for white spot enamel lesion namely; resin infiltration, remineralization and micro-abrasion on enamel surface roughness and micro-hardness.
Materials and methods: Artificial white spot lesions were produced in enamel surface from a sixty intact extracted human permanent premolars were selected for the study. The selected teeth were divided into two groups according to variables to be tested (30 teeth for each group); surface roughness measuring and micro-hardness measuring. Each group was further sub-divided into three subgroups according to methods of treatment of white spot lesion (10 teeth each); resin infiltration, micro-abrasion and remineralization. For both surface roughness and micro-hardness, the assessment was done three times; prior to WSLs productions , after WSLs production and after treatment .
Results: The results of the current study showed that after treatment of WSLs the surface roughness improved significantly in all tested groups. Also, the results of the current study showed that after treatment of the WSLs the microhardness increased in all groups but there was statistically significant difference between Icon ® treated group compared to both Opalustre® and Tooth Mousse® treated groups.
Conculsions: The three tested modalities for the treatment of white spot lesions could improve the surface roughness and the micro-hardness of the treated enamel but the Opalustre® and Tooth Mousse™ were equally effective in improving the microhardness® and more effective than Icon.