Effect of PMMA filler particles addition on the physical properties of resin composite.
The aim of this study was to evaluate the effect of additional polymethyl methacrylate (PMMA) fillers on the physical properties of experimental resin composites. PMMA particles (d=30 µm) were added to an experimental methacrylate-based resin composite in five concentrations of 0, 2.0, 4.8, 9.1, and 23.1 wt%. Properties such as contact angle, water sorption and compressive strength were measured and the fractured specimens were observed with a scanning electron microscope. The results showed that a small amount (2 wt%) of additional PMMA fillers inhibited the crack propagation and enhanced compressive strengths of the resin composites, without a significant change in water contact angle of surface or increased water sorption. However, in higher portions, the mechanical properties were not improved as a debonding at the interface between untreated fillers and the matrix, or failure within the organic filler could reduce the compressive yield strength of the composite.
Kondo
Yoshiko
Y
Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 5-45 Yushima 1-chome, Bunkyo-ku, Tokyo 113-8549, Japan.
Takagaki
Tomohiro
T
Okuda
Makoto
M
Ikeda
Masaomi
M
Kadoma
Yoshinori
Y
Yamauchi
Junichi
J
Okada
Koichi
K
Sadr
Alireza
A
Nikaido
Toru
T
Tagami
Junji
J
D000042:Absorption; D000268:Adhesiveness; D000327:Adsorption; D055598:Chemical Phenomena; D003188:Composite Resins / Q000737:chemistry*; D019245:Compressive Strength; D003764:Dental Materials / Q000737:chemistry*; D055119:Elastic Modulus; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D014867:Water / Q000737:chemistry; D017155:Wettability
D003188:Composite Resins; D003764:Dental Materials; D008689:Methacrylates; D014867:Water; D019904:Polymethyl Methacrylate