Comparison of Mechanical Properties of Resin Composites with Resin Modified Glass Ionomers
Journal Title: Journal of Dental Biomaterials - Year 2015, Vol 2, Issue 2
Abstract
Statement of Problem: There are controversial reports regarding physical and mechanical properties of resin composites and glass ionomer cements. Some revealed higher strength and hardness for resin composites while others showed a comparable value for glass ionomer cements. Evaluation of mechanical properties of different types of resin composites in comparison with resin modified glass ionomers is not widely studied. Objectives: To measure and compare the flexural strength and Vickers hardness of three resin composites and two resins modified glass ionomer cements before and after ageing. Materials and Methods: Three resin composites, i.e. Filtek Supreme XTE (3M ESPE), Ice (SDI), Gradia (GC), and two resins modified glass ionomers, i.e. Fuji II LC (GC) and Riva Light Cure (SDI), were selected. Ten barshaped specimens were prepared for each material and cured using LED curing light. After 24 hours storage in distilled water at 37oC, the specimens were randomly divided into two equal groups (n=5). The first group was tested as a baseline and the second group was restored at 37oC for another 29 days. Flexural strength was performed by four-point bending test using universal testing machine at crosshead speed of 0.5mm/min, and the maximum load at failure was recorded. The specimen’s halves were used for evaluating Vickers hardness, using a Digital Hardness Tester (300 g/15 sec) and the Vickers hardness number (VHN) was recorded. Data were analyzed using one-way analysis of variance (ANOVA), Tukey’s and student’s t-test. Results: After 24 hours of immersion, the highest hardness number was found for Filtek Supreme and Ice and the highest flexural strength was obtained for Gradia. After 30 days of storage, hardness of Fuji II LC and Gradia showed a significant decrease; flexural strength of Ice and Fuji II LC revealed a significant increase while Gradia and Filtek Supreme showed a significant decrease. Conclusions: Resin modified glass ionomers showed a comparable result for hardness and flexural strength with some of the tested resin composites and lower values than some others.
Authors and Affiliations
NA Taha, A Ghanim, MS Tavangar
Keywords
Related Articles
- EP ID EP248907
- DOI -
- Views 80
- Downloads 0
The Effect of Four Commonly Used Root Conditioner Agents in Different Time Periods Applied on Periodontally Diseased and Healthy Teeth
Statement of Problem: Root surface contamination or infection can potentially change the consequences of regenerative periodontal therapies and therefore the modification and disinfection of the contaminated root surface...
Impacted Mandibular Third Molar, Associated Pathoses, and Their Relation to Angulation and Impaction Depth: A Cone Beam CT Study
Statement of problem: prophylactic removal of the impacted lower third molar (ILTM) is controversial and accompanying pathologic conditions play an important role. Objectives: The aim of the present study is to evaluate...
The Effect of Two Types of Denture Adhesive on the Satisfaction Parameters of Complete Denture Wearers
Statement of Problem: Patient satisfaction is highly influenced by the retention of the denture. In some instances using denture adhesives may help the patient to achieve this goal. Objectives: The purpose of this study...
The Effect of Fracture Pattern of Anterior Teeth on Fracture Strength of Silorane- Based and Nanohybrid Composite Restorations
Statement of problem: One of the most important concerns in choosing a treatment plan for a fractured anterior teeth is their fracture pattern. Selecting the best restorative material is crucial in restoration of them....
Comparing the Accuracy of Silicone and Polyether in Reproducing Gingival Height for Implant Supported Crown: an in vitro study
Statement of Problem: Accurate impressions are one of the most critical factors in achieving acceptable restorations. When pouring the impressions of implant supported restorations, soft materials like silicone and polye...