HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (5) Citing Articles via Google Scholar Google Scholar Articles by Xu, H.H. K. Articles by Giuseppetti, A.A. Search for Related Content PubMed PubMed Citation Articles by Xu, H.H. K. Articles by Giuseppetti, A.A.

Wear and Mechanical Properties of Nano-silica-fused Whisker Composites

Paffenbarger Research Center, American Dental Association Foundation, National Institute of Standards and Technology, Building 224, Room A-153, Stop 8546, Gaithersburg, MD 20899-8546, USA;

^* corresponding author, hockin.xu{at}nist.gov

Resin composites must be improved if they are to overcome the high failure rates in large stress-bearing posterior restorations. This study aimed to improve wear resistance via nano-silica-fused whiskers. It was hypothesized that nano-silica-fused whiskers would significantly improve composite mechanical properties and wear resistance. Nano-silicas were fused onto whiskers and incorporated into a resin at mass fractions of 0%-74%. Fracture toughness (mean ± SD; n = 6) was 2.92 ± 0.14 MPa•m for whisker composite with 74% fillers, higher than 1.13 ± 0.19 MPa•m for a prosthetic control, and 0.95 ± 0.11 MPa•m for an inlay/onlay control (Tukey’s at 0.95). A whisker composite with 74% fillers had a wear depth of 77.7 ± 6.9 µm, less than 118.0 ± 23.8 µm of an inlay/onlay control, and 172.5 ± 15.4 µm of a prosthetic control (p < 0.05). Linear correlations were established between wear and hardness, modulus, strength, and toughness, with R = 0.95–0.97. Novel nano-silica-fused whisker composites possessed high toughness and wear resistance with smooth worn surfaces, and may be useful in large stress-bearing restorations.

KEY WORDS: dental resin composite • nano-silica-fused whiskers • wear • mechanical properties • mechanisms

This article has been cited by other articles:

				H.H.K. Xu, L. Sun, M.D. Weir, J.M. Antonucci, S. Takagi, L.C. Chow, and M. Peltz Nano DCPA-Whisker Composites with High Strength and Ca and PO4 Release. J. Dent. Res., August 1, 2006; 85(8): 722 - 727. [Abstract] [Full Text] [PDF]