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An evaluation of retention of implant supported crown on short abutment with surface modifications using different luting agents

Author: 
Dr. Babina Chirom, Dr. Rathika Rai, Dr. Menaga, V., Dr. Sh. Priyadarshani, Dr. Varun Deshpande, Dr. Arun. Kumar, S. and Dr. Kangjam Gunadhar
Subject Area: 
Health Sciences
Abstract: 

Aims and Objectives: This study was done to compare and evaluate the retention of crown on abutment with polished surface, circumferential grooves, sandblasted and abutment both with grooves and surface abrasion using different cements. Materials and Methods: In this study, 10 test samples each with polished surface, circumferential grooves, sandblasted, both with grooves and surface abrasion were used. The copings were fabricated in conventional way with a wax ring attached to the occlusal portion. Different cements tempbond, Resin modified GIC (GC Fuji Cem), polycarboxlate cement (Harvard Cement) was applied. Each coping was seated and a static load of 50 N was applied. The specimens were assembled in the universal testing machine and subjected to a pullout test. The forces required to remove the copings were recorded in new tons. To compare the mean values between Cements and Models two way ANOVA was applied, for pair wise comparison of mean values Tukey HSD post hoc test were used. Results: The mean peak load was highest 272.85 in grooves and sandblasted surface using polycarboxylate cement .The mean break load highest 40.080 in sandblasted surface. The mean ultimate tensile strength was significantly highest 15.142 in grooves & sandblasted using polycarboxylate cement. Conclusion: The retention of the crown on abutment with the sandblasted Surface and grooves provided better retention under peak load and impart ultimate tensile strength. The break load was maximum in sandblasted surface using definitive cement GC Fuji cem.

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