Hazim F. El-Mobayed, Sherif Bahget And Rania Abdullah Nasr,

ABSTRACT
Objective: The Aim Of The Study Was To Evaluate The Shear Bond Strength Of GC Fuji IX GP And Riva Resin Modified Glass Ionomer As A Filling Material Of Deciduous Molars With And Without Salivary Contamination By Using Instron Universal Testing Machine (an In-vitro Study). Method: A Total Number Of 140 Caries Free Second Primary Molars Freshly Extracted For Orthodontic Reasons Or Sheded Which Material Tested Were Glass Ionomer Restorations GC Fuji IX GP ( Regular, Fast, Extra Fast) And Riva SDI ( Self Cure Regular, Self Cure HV, Light Cure Regular, Light Cure HV) Were Divided Into 2 Groups. Group I Which Includes 60 Second Primary Molars Had Been Filled With Fuji IX Which Subdivided Into 3 Subgroups Each Subgroup Had 10 Primary Molars With Saliva Contamintion And 10 Primary Molars Without Saliva Contamination Group II Which Include 80 Second Primary Molars Had Need Filled With Riva SD Which Subdivided Into 4 Groups Each Groups Had 10 Primary Molar With Saliva Contamintamin And 10 Primary Molars Without Saliva Contamination Each Tooth Was Vertically Embedded Into Acrylic Mould Polyvinyl Chloride Rings.In The Salivary Contaminated Subgroups, The Dentinal Surface Was Contaminated With Human Saliva.The Specimen Were Individually And Horizontally Mounted On A Computer Controlled Materials Testing Machine. Result: The Mean Shear Bond Strength In GroupI: Fuji IX That GC Fuji IX ?Regular, It Was Found That Saliva Non-contaminated Group Recorded Statistically Significantly (P<0.05) Higher Shear Bond Strength Mean Value (3.32 � 0.51 MPa) Than Contaminated Group (2.78� 0.48 MPa) As Indicated By Paired T-test.GC Fuji IX ? Fast, It Was Found That Saliva Contaminated Group Recorded Statistically Non-significant (P>0.05) Higher Shear Bond Strength Mean Value (3.35 � 0.45 MPa) Than Non-contaminated Group (3.3� 0.4 MPa). GC Fuji IX ? Extra Fast, It Was Found That Saliva Non-contaminated Group Recorded Statistically Non-significant (P>0.05) Higher Shear Bond Strength Mean Value (2.89 � 0.72 MPa) Than Contaminated Group (2.09� 0.41 MPa Group II (Riva SDI) Light Cure ?Regular, It Was Found That Saliva Non-contaminated Group Recorded Statistically Non-significant (P>0.05) Higher Shear Bond Strength Mean Value (8.173 � 2.7 MPa) Than Contaminated Group (7.03�1.7 MPa) Where Light Cure ? High Viscosity, It Was Found That Saliva Non-contaminated Group Recorded Statistically Non-significant (P>0.05) Higher Shear Bond Strength Mean Value (6 � 1.3 MPa) Than Contaminated Group (5.99 � 0.65 MPa) ,Self Cure ?Regular; It Was Found That Saliva Non-contaminated Group Recorded Statistically Non-significant (P>0.05) Higher Shear Bond Strength Mean Value (3.5 � 0.78 MPa) Than Contaminated Group (3.38 � 1.1 MPa) Self Cure ? High Viscosity, It Was Found That Saliva Contaminated Group Recorded Statistically Non-significant (P>0.05) Higher Shear Bond Strength Mean Value (4.78 � 1.7 MPa) Than Non-contaminated Group (3.6 � 0.87 MPa). Conclusion: The Shear Bond Strength Of The Glass Ionomer Materials Without Saliva Contamination Showed Highest Bond Strength Than With Saliva Contamination Except Fuji- Fast And Riva Self Cure ? High Viscosiy.The Riva Light Cure ? Regular Without Saliva Contamination Revealed Highest Shear Bond Strength Where The Fuji IX Extra Fast With Saliva Contamination Revealed Lowest Shear Bond Strength.