Remineralization of Acid Etched Dentin Using Portland Cement and Phosphate Containing Fluids

Abstract

This study contained an in vitro remineralization study of 144 partially demineralized dentin surfaces .The proximal dentin surfaces of the specimens received portland cement ( group 1 ) , or calcium hydroxide ( group 2) , or the dentin surfaces of the specimens acted as negative control and did not receive Portland cement or calcium hydroxide (group3) . The teeth were aged in phosphate containing fluid (subgroup 1), phosphate containing fluid plus polyacrylic acid (subgroup 2), phosphate containing fluid plus polyvinyl phosphonic acid (subgroup 3) and phosphate containing fluid containing the dual biomimetic analogs ( subgroub 4) for periods of one month and three months,then specimens restored with a universal composite using two self etch adhesive systems. and the remineralization was evaluated at dentin according to SEM and EDX results .The results indicating a progressive increase in remineralization through out the aging periods. Ca(OH)2 group has shown the best remineralization , also, portland cement group resulted in a more remineralization relative to the control group. Furthermore, aging in PCF+PVPA had the greatest increase in remineralization followed by PCF+VPA+PAA then PCF while aging in PCF+PAA had the least effect on remineralization . The shear bond strength of control group is significantly higher than other two groups. Significant difference was recorded only for PCF+PVPA+PAA remineralizing solution . Significant difference was found between one month and three months aging period . No significant difference was found between two adhesive types .