Radwa Hamam Gaafer , Yasser Fathi Hussien And Amr Helmy Mostafa,

ABSTRACT


Introduction: Resin Modified Calcium Silicates Cement (RMCS) Has Been Reported To Stimulate Pulp Cells To Form Secondary Dentin In The Form Of Hydroxyapatite Crystals. Aim Of The Work: This Study Was Carried Out To Evaluate The Biological Effect, Compressive Strength And Diametral Tensile Strength Of Resin Modified Calcium Silicate Cement And MTA.

Materials and Methods: For Biological Effect On Dental Pulp Of Dog, Two Healthy Male Dogs Were Used For Direct Pulp Capping Procedure. Class V Cavities Were Prepared On The Labial Surface Of Posterior Teeth Till Pulp Exposure And Capped With Tested Materials And Filled With Glass Ionomer. After Four Weeks The Pulp Capped Teeth Were Extracted And Prepared For Study Of The Histopathological Effect On The Pulp. For Compressive Strength Test, 10 Samples From Each Material (resin Modified Calcium Silicate & MTA Cem) Were Prepared In A Cylindrical Teflon Mold (6 ?3 Mm). And Then Compressed In Instron Till Fracture. For The Diametral Tensile Strength Test 10 Samples From Each Material Were Prepared In A Cylindrical Teflon Mold (3 ?6 Mm). Then They Were Compressed Diametrically Till Fracture The Samples Into Two Halves.

Results: Data For Histopathological And Mechanical Were Collected, Tabulated And Statistically Analyzed Using One Way ANOVA Test For Mechanical Results And Independent T- Test For Histopathological Results, The Inflammatory Cell Response Of Resin Modified Calcium Silicate Cement Was More Than MTA. The Compressive Strength Of Resin Modified Calcium Silicate Cement Was 85.3�11.1 Mpa While The Compressive Strength Of MTA Cem And Was 3.4�0.9 Mpa. The Results Of Diametral Tensile Strength Were For Resin Modified Calcium Silicate Cement Higher Than MTA Cem. Conclusion: Resin Modified Calcium Silicate Cement Has Higher Inflammatory Cell Response And Mechanical Properties Than MTA.