Wear of resin-modified glass ionomers: an in vitro study.
The purpose of this study was to evaluate the wear resistance and clinical applicability of resin-modified glass ionomer cements as restorative or fissure-sealing materials. The in vitro wear of resin-modified glass ionomers was compared to conventional glass ionomers, a resin-based sealant, and a composite resin. A three-body wear test (enamel block--polymethylmethacrylate powder--experimental dental material) was performed by 20,000 cycles with a load of 4 kgf/cm2. The depth of wear of the experimental materials was measured and calculated using a computerized laser surface scanner. The glass ionomers generally showed more wear than the resin-based sealant and the composite resin, but there was no difference in wear between resin-modified and conventional glass ionomers. Type III ionomers (used for sealant) showed lower wear resistance than type II ionomers (used for restoration).
Futatsuki
M
M
Department of Pediatric Dentistry, Kyushu University Faculty of Dentistry, Fukuoka, Japan. futam@dent.kyushu-u.ac.jp
Nozawa
M
M
Ogata
T
T
Nakata
M
M
D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins / Q000737:chemistry; D019554:Dental Restoration Wear; D003793:Dental Restoration, Permanent; D005899:Glass Ionomer Cements / Q000737:chemistry; D007834:Lasers; D008422:Materials Testing; D010895:Pit and Fissure Sealants; D012117:Resins, Synthetic; D012815:Signal Processing, Computer-Assisted; D012822:Silicon Dioxide; D015040:Zirconium
D003188:Composite Resins; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D010895:Pit and Fissure Sealants; D012117:Resins, Synthetic; C083568:Z100 composite resin; C090915:GC Fuji III; C084541:Fuji glass-ionomer lining cement; D017438:Bisphenol A-Glycidyl Methacrylate; D012822:Silicon Dioxide; D015040:Zirconium