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Two-body wear of dental restorative materials.

Abstract：

AIM:The aim of this in vitro study was to determine the two-body wear resistance of modern direct dental restorative materials. METHODS:Eight standardized specimens were prepared from 14 dental restorative materials (nano-, micro-, hybrid-, macrofilled composites; compomer, silorane, ormocer); a veneering composite (Sinfony) and enamel were used for reference. Vickers hardness (HV) and inorganic filler weight were determined. Specimens were subjected to mastication simulation using a mastication simulator (50 N, 1.2×10(5) cycles, 1.2 Hz) in a pin-on-block design and simultaneous thermal cycling (600 cycles, 5/55 °C, 2 min/cycle). Steatite balls were used as antagonists. Vertical substance and volume loss were determined using cast replicas and a 3D laser scanning device. Means and standard deviations were calculated, and statistical analysis was performed using one-way ANOVA and the Games-Howell test for post hoc analysis (α=.05). RESULTS:HV ranged between 19 and 76; inorganic filler weight ranged between 44% and 88%. Significantly lowest vertical substance and volume loss were detected for the microfilled composite Heliomolar; enamel yielded similar vertical substance and volume loss. Intermediate wear was found for the other microfilled and hybrid composites as well as the silorane and the ormocers. Significantly highest wear was found for the macrofilled composite Quixfil and the compomer Compoglass F. DISCUSSION:Within the limitations of an in vitro study, the findings indicate similar wear behaviour for silorane- and ormocer-based dental restorative materials. However, correlations between HV, filler content, and wear resistance were poor.

journal_name

J Mech Behav Biomed Mater

journal_title

Journal of the mechanical behavior of biomedical materials

authors

Hahnel S,Schultz S,Trempler C,Ach B,Handel G,Rosentritt M

doi

10.1016/j.jmbbm.2010.06.001

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

237-44

issue

3

eissn

1751-6161

issn

1878-0180

pii

S1751-6161(10)00077-9

journal_volume

4

pub_type

杂志文章

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