Toothbrush abrasion of paint-on resins for shade modification and crown resins: effect of water absorption.
In order to investigate the clinical application of paint-on resins, the effect of water absorption on toothbrush abrasion and light transmittance of ten crown resins including three paint-on resins was examined. Water absorption into each material ranged from 0.29 to 0.89 mg/cm2 after storage in distilled-water for 6 weeks and their hardnesses decreased by 3.5-22.3%. Maximum surface roughness (Rmax) of the materials stored in distilled water for 6 weeks increased with an increasing number of toothbrush abrasion cycles and ranged from 1.9 to 10.5 microm after 100,000 cycles. Also, Maximum depth and weight loss as an indicator of the amount of each material lost by abrasion showed similar behaviors similar to Rmax. These results indicated that the abrasion resistance of paint-on resins was located in the middle among all materials examined.
Department of Biomaterials Science, Field of Oral and Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan. fuji@dentb.hal.kagoshima-u.ac.jp
Koichi
K
Fujii
Hiroyuki
H
Arikawa
Takahito
T
Kanie
Seiji
S
Ban
D000042:Absorption; D003116:Color; D003442:Crowns; D003801:Dental Veneers; D006244:Hardness; D008027:Light; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D013499:Surface Properties; D014099:Toothbrushing; D014867:Water
D008689:Methacrylates; D011140:Polyurethanes; D014867:Water; C029824:urethane dimethacrylate luting resin