An In Vitro Study to Evaluate Retentive Property of Resinous Dental Adhesives and other Dental Luting Cements

Background: Retention of crowns depends on various factors such as the retentive properties of the luting cements and the type of cast metal. Limited information is available regarding the retentive strengths of crowns, cemented with resin cements.

Objective: The purpose of the study was to evaluate the retentive property of resinous dental adhesives with three other luting cements.

Material and methods: Twenty freshly extracted human sound first mandibular molar was used for the study. The ischolar_main of each tooth was embedded into a cylindrical shape block of self cured resin. Each of the tooth samples was prepared to receive a full metal crown. Total samples were divided into four groups, each containing five samples, for cementation of the metal crown in order to compare retentive properties of resinous adhesive and other luting agents; group A- resinous adhesive Panavia, group B - Zinc Phosphate cement, Group C- Glass ionomer cement, and group D- polycarboxylate cement. After 10min of cementation, the retention test was performed in an Instron tensile testing machine, to analyze the retentive properties of different luting cements. A one-way analysis of variance was used to analyze the data, with a significance level of alpha =.05.

Results: Result showed a maximum mean retentive strength in Panavia Ex. (281.34kg), followed by Glass Ionomer (70.21kg), Polycarboxylate (63.06kg), and least in Zinc Phosphate cement (40.31 kg), which was statistically significant.

Conclusion: Within the limitation of the present study, it was concluded that resinous adhesive Panavia Ex. cement has better retentive properties compare to other luting cements.