Amr Mohammed Almesery , Mohamed Farag Ayad And Amany Mohammed Korsel,
ABSTRACT
Purpose: This Study Was Done To Evaluate The Influence Of Different Cementation Systems On The Bond Strength Of IPS E-max Press Ceramic Crowns To The Tooth Surface
Materials and Methods: Twenty Freshly Extracted Human Incisors Received Standardized Tooth Preparation For All Ceramic Crowns. The Specimens Were Divided Into 4 Groups Based On The Type Of Resin Cement Used, Each Group Included Five Teeth For Each Group .Group I: The Crowns Were Cemented With Variolink N(VN) Total Etch Resin Cement, Group II: The Cementaion With Variolink Veneer(VV) Total Etch Resin Cement, GroupIII: With Bifix SE Self Adhesive Resin Cement,while GroupIV: The Cemention With G Cem Self Adhesive Resin Cement. All Specimens Subjected To Tensile Bond Strength Test Using An Instron Testing Machine (Model 3345; Instron Industrial Products, Norwood, USA) With A Load Cell Of 5 KN At Cross Head Speed (1mm/min). Mean Values For Each Group Were Calculated, And Differences Between The Groups Were Tested For Statistical Significance By Use Of One-way Analysis Of Variance (ANOVA).
Results: The Highest Tensile Bond Strength Mean Value Recorded For VN Group (7.081�1.32 MPa) Followed By VV Group Mean Value (4.377�0.919 MPa) Then GC-CEM Group Mean Value (3.981�0.522 MPa) While The Lowest Tensile Bond Strength Mean Value Recorded For Bifix Group (3.497�0.602 MPa). The Difference Between All Cement Groups Was Statistically Significant As Revealed With One-way ANOVA Test (p<0.05). ). Pair-wise Tukey?s Post-hoc Test Showed Non-significant (p>0.05) Differences Between ( VV Group And GC-CEM Group), (VV Group And Bifix Group) And (GC-CEM Group And Bifix Group)-
Conclusion: The Total Etch Resin Cements Represent The Most Reliable Way For Achieving The Best Bond Strength To E-max Press Ceramic Crowns In In-vitro Study, Where E-max Press Ceramic Crowns Showed Better Bonding Strength To Tooth Structure When Luted With Variolink N(VN) Total Etch Resin Cement Compared To Other Cement Systems
