IADR Abstract Archives
Flexural Strength Properties of Light Cured Composite Resin and Zirconia Reinforced Glass Ionomer
Objectives: To evaluate the flexural strength of Zirconia reinforced Glass Ionomer Cement compared to Conventional Light Cured Composite Resin.
Methods: The experimental method of research was used in the study that was yield on qualitative data. It is defined as a type of research that experiments a state of affairs as fully as possible. In vitro biophysiologic measurement by laboratory analytical (Universal Testing Machine) was used to appropriate in comparing the flexural strength properties of light cure composite resin and zirconia reinforced glass ionomer.
The study is conducted among 8 samples for light cured composite resin and zirconia reinforced glass ionomer, relatively with size of 2mm x 2mm x 25mm prepared under the same room temperature and humidity, and tested using the Universal Testing Machine for flexural strength. Samples were prepared and tested under the restrictions of ISO 9917-1 for powder/liquid acid-base cements and ISO 9917-2 for resin-modified cements.
Results: Light cure composite resin shows a mean value of 65.18MPa. Zirconia reinforced glass ionomer presents a mean value of 21.77 MPa. Means and standard deviation of both research variables showed a standard deviation of 15.52 for composite resin and 6.67 for zirconia reinforced glass ionomer. The computed value and tabular value of the flexural strength between the 2 variables using t-test were: composite resins (15.52) having greater standard deviation than zirconia reinforced glass ionomer (6.67).
Conclusions: Both samples have shown properties of applicable medication for posterior tooth restoration but, one has an outstanding result which is proven to be long lasting and can withstand wear and tear process of the oral cavity for the permanent dentition. Based on the results, light cured composite resin has a higher flexural strength as compared to zirconia reinforced glass ionomer.
However, because of the favorable properties of glass ionomer such as fluoride release (Forsten,1977; deschepper et al., 1990), It’s adhesion to mineralized dental tissues, (Wilson and McLean, 1988) the Zirconia reinforced Glass ionomer cement can be good option for dental restorations for areas that do not require heavy forces of mastication such as deciduous tooth fillings and class V cavity preparations.
Methods: The experimental method of research was used in the study that was yield on qualitative data. It is defined as a type of research that experiments a state of affairs as fully as possible. In vitro biophysiologic measurement by laboratory analytical (Universal Testing Machine) was used to appropriate in comparing the flexural strength properties of light cure composite resin and zirconia reinforced glass ionomer.
The study is conducted among 8 samples for light cured composite resin and zirconia reinforced glass ionomer, relatively with size of 2mm x 2mm x 25mm prepared under the same room temperature and humidity, and tested using the Universal Testing Machine for flexural strength. Samples were prepared and tested under the restrictions of ISO 9917-1 for powder/liquid acid-base cements and ISO 9917-2 for resin-modified cements.
Results: Light cure composite resin shows a mean value of 65.18MPa. Zirconia reinforced glass ionomer presents a mean value of 21.77 MPa. Means and standard deviation of both research variables showed a standard deviation of 15.52 for composite resin and 6.67 for zirconia reinforced glass ionomer. The computed value and tabular value of the flexural strength between the 2 variables using t-test were: composite resins (15.52) having greater standard deviation than zirconia reinforced glass ionomer (6.67).
Conclusions: Both samples have shown properties of applicable medication for posterior tooth restoration but, one has an outstanding result which is proven to be long lasting and can withstand wear and tear process of the oral cavity for the permanent dentition. Based on the results, light cured composite resin has a higher flexural strength as compared to zirconia reinforced glass ionomer.
However, because of the favorable properties of glass ionomer such as fluoride release (Forsten,1977; deschepper et al., 1990), It’s adhesion to mineralized dental tissues, (Wilson and McLean, 1988) the Zirconia reinforced Glass ionomer cement can be good option for dental restorations for areas that do not require heavy forces of mastication such as deciduous tooth fillings and class V cavity preparations.