Conference Paper

In vitro Three-Body Wear of Five Composites and Amalgam

Authors:
To read the full-text of this research, you can request a copy directly from the authors.

Abstract

Objective: To evaluate the wear resistance of 5 commercially available resin composites and a high copper amalgam using an in vitro three-body wear tester. Methods: Eight flat disc specimens of each composite (d=6mm/t=4mm) were prepared using a flexible mold following manufacturers' instructions, in two increments. Top layer was cured through a glass slide (Bluephase-IvoclarVivadent/1100mW/cm2). Amalgam was triturated (Optimix-Kerr/14seconds/3800rpm) and condensed into an elastic mold (d=6mm/t=6mm) in three increments. Specimens were stored in distilled water (24h/37C) and then mounted in brass holders (d=10mm) using a self cured acrylic resin. They were polished with 600- and 1200-grit SiC paper using a rotational polishing device, wet finished with 0.05 alumina slurry on a polishing cloth and cleaned in an ultrasonic bath for 10mins. Wear test was conducted using a 50 polymer-bead slurry (15g+9g H2O) and 75N load for 400,000 cycles with stainless steel styli (Type 440C, d=4.70mm) at 1.2Hz. Specimens were scanned before and after testing using a 3D non-contact profilometer (PROSCAN2000/Scantron/UK). Wear volumes and maximum wear depths were measured by superimposing before and after images (ProForm Software/Scantron/UK). Data was analyzed using one-way ANOVA and Tukey/Kramer tests (p=0.05). Results: (MeanSD) Materials Type Volume(mm3) Depth() Estelite Flow Quick/Tokuyama Nano filled 0.0070.001 42.89 Filtek Supreme Plus/3M-ESPE Nano-filled 0.0110.005 58.126 Durafill VS/Heraeus-Kulzer Micro-filled 0.0320.017 92.511 EsthetX HD/Dentsply-Caulk Nano-filled 0.0110.002 58.78 Herculite Ultra/Kerr Nano-hybrid 0.0110.001 63.37 Dispersalloy/Dentsply-Caulk High-Cu Amalgam 0.0110.003 77.69 Volume: Durafil had significantly greater wear volume than all the other materials tested (p<0.0001). Depth: Durafil had significantly higher wear depth compared to other materials except for amalgam. Other differences were found between Estelite Quick Flow and amalgam; and Estelite Quick Flow and Herculite Ultra (p<0.05). Conclusion: Newer composite resins have wear resistant comparable to a high copper amalgam. Funded in part by a grant from Tokuyama Dental Corp.

No full-text available

Request Full-text Paper PDF

To read the full-text of this research,
you can request a copy directly from the authors.

ResearchGate has not been able to resolve any citations for this publication.
ResearchGate has not been able to resolve any references for this publication.