Influence of Octacalcium Phosphate addition on physical-mechanical properties of Glass Ionomer Cement

Gabriela De Souza Balbinot,Isadora Martini Garcia,Susana Maria Werner Samuel,Fabricio Mezzomo Collares,Vicente Castelo Branco Leitune

doi:10.15448/1980-6523.2017.3.28062

Gabriela De Souza Balbinot, Isadora Martini Garcia + Show 3 more

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https://doi.org/10.15448/1980-6523.2017.3.28062

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Abstract

OBJECTIVE: The aim of this study was to evaluate the influence of octacalcium phosphate (OCP) addition to conventional glass ionomer cement (GIC).METHODOLOGY: A commercial glass ionomer cement (Vidrion R – S.S. White Artigos Dentários Ltda – Rio de Janeiro, Brazil) was used in this study. OCP was added to powder in 1.5 and 3 wt%. GIC without OCP addition was used as control. Specimens were produced to evaluate radiopacity, setting time and diametral tensile strength of cements. Radiopacity was assessed by phosphor plate system with alluminium step-wedge for comparison. For setting time determination, Gilmore needle (100 g) was used to determine final setting reaction. Diametral tensile strength was measured in a universal testing machine. Data were analyzed by one-way ANOVA at a significance level of 95%.RESULTS: Results showed no statistically significant difference in tested properties with octacalcium phosphate addition in any concentration.CONCLUSION: OCP addition to GIC did not influence materials properties.

Highlights

Selective removal of carious lesions is a current strategy for minimal intervention in deep dentin [1]
This is essential for Glass Ionomer Cements (GIC)’s application as calcium ions are responsible for bonding between cement and surrounding tissues which is key for good sealing of deep carious dentin cavities [2, 3]
Addition, no statistically significant difference was found for cement radiopacity and setting time

Summary

Introduction

Selective removal of carious lesions is a current strategy for minimal intervention in deep dentin [1]. It is expected that physiological reaction in the pulp-dentin complex promote reactional dentin formation and pult tissue protection [1, 2] Success of this technique requires sealing of cavities to prevent bacterial infiltration and caries progression. GIC’s are water-based cements dispensed as a fluoro-aluminosilicate glass and a polyalkenoic acid, which reacts through acidic attack to the glass particles leading to ion release from the glass matrix. This is essential for GIC’s application as calcium ions are responsible for bonding between cement and surrounding tissues which is key for good sealing of deep carious dentin cavities [2, 3]

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Conclusion