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- Title
Effect of the incorporation of hydroxyapatite on the diametral tensile strength of conventional and hybrid glass ionomer cements.
- Authors
Mederos, Matias; Cuevas-Suarez, Carlos Enrique; Sanchez, Walter; Miranda, Pablo; Francia, Alejandro; Pardo, Helena; Villanueva-Stark, Juan Pablo; Kreiner, Marcelo; Grazioli, Guillermo
- Abstract
The objective was to evaluate the effect of the incorporation of calcium hydroxyapatite particles (HAp) in the diametral tensile strength of a conventional type II glass ionomer (GC Gold Label 2) and a resin-modified glass ionomer cement (GC Gold Label 2 LC R). Two experimental HAp (E1HAp or E2HAp) were synthesized and characterized using X-ray diffraction and Confocal Raman spectroscopy. Both HAp were added into the powder of a conventional or resin-modified glass ionomer cement at 5 or 10 wt.%. A commercial HAp (CHAp) was used as reference material. For each glass ionomer cement, a group without the incorporation of HAp was used as a control. A universal testing machine was used for the mechanical test. The results were analyzed through a two-way ANOVA test followed by a complementary Tukey test. For all analyzes, the level of significance was set at α = 0.05. The average particle size for E1Hap was 15 µm, E2HAp was 35 μm and for CHAp was 1 µm. For conventional GIC, the addition of 10% E1HAp and 5% CHAp significantly increased the diametral tensile strength values (p ≤ 0.005). On the other hand, for the resin-modified GIC, except for the 5% E2HAp group, all experimental groups significantly reduced the values of diametral tensile strength (p ≤ 0.007). The addition of HAp improved the mechanical properties only for the conventional glass ionomer cement.
- Subjects
TENSILE strength; HYDROXYAPATITE; CEMENT; GLASS; TWO-way analysis of variance
- Publication
Odontology, 2021, Vol 109, Issue 4, p904
- ISSN
1618-1247
- Publication type
Article
- DOI
10.1007/s10266-021-00624-1