title: Three body wear studies of five dental composites preconditioned in food simulating media.
abstract: Progressive three body wear up to 30 min for five dental composites (Concise, Heliomolar, Occlusin, P-30, Profile, TPH) stored for 9 months at 37 degrees C in citrate, lactate and PBS buffers, 25 and 75% ethanol media, has been measured using a wear tester. Particle size of the filler and the storage media are found to play dominant roles in determining the extent of wear. Heliomolar, which is a microfilled composite, shows maximum wear whereas wear is least in composites containing filler particles of conventional and hybrid size such as P-30 (> 1 micron). The storage media is found to attack and degrade glass filler particles compared to composites having quartz fillers.
authors.affiliation: Department of Clinical Engineering, University of Liverpool, UK.
authors.forename: L H
authors.initials: LH
authors.lastname: Mair
authors.forename: V K
authors.initials: VK
authors.lastname: Krishnan
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002021:Buffers; D019343:Citric Acid / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003799:Dental Stress Analysis; D019544:Equipment Failure Analysis; D000431:Ethanol / Q000737:chemistry; D005502:Food; D006863:Hydrogen-Ion Concentration; D007773:Lactates / Q000737:chemistry; D008409:Mastication; D008954:Models, Biological; D010316:Particle Size; D010710:Phosphates / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D012995:Solubility; D013314:Stress, Mechanical; D013997:Time Factors; D014520:Urethane / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D002021:Buffers; C029012:Composite Dental Resin; D003188:Composite Resins; C513708:Heliomolar; D007773:Lactates; D010710:Phosphates; D011140:Polyurethanes; C403007:profile TLC; C056413:Occlusin; D019343:Citric Acid; C048711:P-30 composite resin; D014520:Urethane; D000431:Ethanol; D017438:Bisphenol A-Glycidyl Methacrylate