Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Operative Dentistry

Aim: This study was conducted to evaluate and compare the thickness of calcific bridge that would be produced by light activated calcium silicate versus light activated calcium hydroxide by indirect pulp capping and measured the thickness of calcific bridge immediately after restoration and one year later using digital radiography. Methodology: 30 participants were recruited in this study for having 60 carious molars with deep occlusal carious lesion. Molars of each patient were randomly divided in to two groups treated with partial caries removal technique the first group represented teeth treated with application of light activated calcium silicate prior to final permanent resin composite restoration, the second group represented comparator group represented teeth treated with light activated calcium hydroxide. Radiographic images were obtained with photo stimulable phosphor plate and radiographic dentin bridge thicknesses were evaluated using Digora for windows computer software at baseline immediately after restoration and after one year. Results: The formed dentin bridge thickness was thicker in the calcium hydroxide group than calcium silicate (TheraCal) group (0.24%mm and 0.16%mm respectively) and the percentage of change in dentin bridge thickness after one year was thicker in calcium hydroxide group than calcium silicate (TheraCal) group (24% and 16.26% respectively). Conclusions: calcium hydroxide still effective as a pulp capping material if compared to resin modified calcium silicate by indirect pulp capping and radiographic assessment of thickness the calcific bridge formation to monitor the clinical behavior of capping materials is a reliable method

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