Three body wear studies of five dental composites preconditioned in food simulating media

Article type: Research Article

Authors: Mair, L.H. | Krishnan, V. Kalliyana^;

Affiliations: Department of Clinical Engineering, University of Liverpool, Liverpool L69 3BX, UK

Note: [] Address correspondence to present address: Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences & Technology, Trivandrum, India 695 012. E‐mail: kalyankv@sctimst.ker.nic.in.

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^{\circ}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\mum). The storage media is found to attack and degrade glass filler particles compared to composites having quartz fillers.

Keywords: Three body wear, food simulating media, dental composite

Journal: Bio-Medical Materials and Engineering, vol. 9, no. 3, pp. 145-149, 1999