A comparison of three different methods for the quantification of the in vitro wear of dental materials

Autor: A. Cavalleri, Valentin Rousson, G. Zellweger, M. Forjanic, Siegward D. Heintze
Přispěvatelé: University of Zurich, Heintze, S D
Rok vydání: 2005
Předmět:
Materials science
Laser scanning
Surface Properties
Polyurethanes
Acrylic Resins
610 Medicine & health
engineering.material
Composite Resins
Dental Amalgam
Urethane
Stress (mechanics)
Dental Materials
2211 Mechanics of Materials
Materials Testing
medicine
Forensic engineering
Humans
General Materials Science
Attrition
Bisphenol A-Glycidyl Methacrylate
Ceramic
Composite material
General Dentistry
10060 Epidemiology
Biostatistics and Prevention Institute (EBPI)
medicine.disease
3500 General Dentistry
Dental Porcelain
2500 General Materials Science
Dental Restoration Wear
Resin Cements
Amalgam (dentistry)
Herculite XRV
Mechanics of Materials
Glass Ionomer Cements
visual_art
visual_art.visual_art_medium
engineering
Methacrylates
Aluminum Silicates
Profilometer
Stress
Mechanical
Silicate Cement
Wear simulator
Zdroj: Dental materials : official publication of the Academy of Dental Materials. 22(11)
ISSN: 0109-5641
Popis: Objective Different approaches are utilized to quantify the wear generated on flat specimens with a wear simulator. However, there are no systematic studies comparing different wear quantification methods with a series of materials that exhibit different wear rates. Methods Sixteen restorative materials, including 14 composites (BelleGlass, Chromasit, Estenia, Esthet-X, Four Seasons, Heliomolar RO, Heliomolar HB, Herculite XRV, InTen-S, Point 4, SureFil, Targis cured at 95 and 130 °C, Tetric Ceram) as well as an amalgam (Amalcap) and a ceramic (Empress) material, were subjected to attrition wear against standardized Empress antagonists in the Willytec wear simulator (120,000 cycles, 5 kg, 1.6 Hz). The volume and maximal vertical loss were quantified directly on the specimens with a profilometry device (Perthometer) and the FRT MicroProf optical sensor. After the fabrication of plaster replicas, the loss was also determined with a 3D laser scanning device. For the statistical analysis, the data were subjected to a logarithmic transformation. Intraclass correlation was calculated to measure the agreement among all three methods, while limits of agreement were used to compare one method against another. Results There was a very good agreement between all three quantification methods for both volume and vertical loss. The mechanical sensor measured consistently higher values compared to the optical sensors for the volume loss (correction factor 0.95), whereas for the vertical loss, consistently lower values were obtained (correction factor 1.17). However, the ranking of the materials was only marginally influenced by the quantification method. Significance All three sensors are suitable for the quantification of wear facets. Due to speed and simplicity, the laser sensor has greater advantages over the two other sensors.
Databáze: OpenAIRE
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