• DR VIJAYA KUMAR R
• DR M VISWAMBARAN
• DR RK DHIMAN

Abstract Background - The need to disinfectant dental impressions is a pertinent protocol which should be followed. In the recent past, researchers and manufacturers have suggested different protocols for disinfection of dental impressions creating confusion in the minds of the operator. Methods – An in-vitro study was undertaken to evaluate effect of four recommended commercially available disinfectant solutions on the wettability of three types of elastomeric impression materials at 10 and 30 minutes time intervals. The impression materials evaluated were addition silicone, condensation silicone and polyether. The disinfectants used were 2% glutaraldehyde, 0.5% sodium hypochlorite, 0.05% iodophor and 0.25% benzalkonium chloride. 100 samples of each impression material was made and subjected to 10 different immersion protocols including distill water as control. The surface wettability (contact angle) of all samples was measured using the contact angle analyzer (Digidrop, Contact angle meter, GBX products, France). The data obtained was statistically analyzed. ‘Two-sample t-tests’, ‘two- way- ANOVA’ and ‘tukey simultaneous test’ was applied. Results – The mean contact angle values of condensation silicone samples were highest among elastomers followed by addition silicone and polyether samples. The mean value of contact angles for 30 minutes immersion time interval was highly significant compared to the corresponding values of 10 minutes immersion time interval (P< 0.0001). In each case, the mean contact angles were higher for 30 minutes immersion time interval. Conclusion - Among the elastomeric impression materials evaluated, wettability wise polyether proved to be the best impression material followed by addition silicone and condensation silicone. Disinfection with 2% glutaraldehyde had shown lowest contact angle values followed by 0.5% sodium hypochlorite solution, 0.25% benzalkonium chloride and 0.05% iodophor respectively.

Key words – Disinfection, hydrophilic, wettability, contact angle, elastomers.

"A COMPARATIVE STUDY ON THE EFFECT OF FOUR DISINFECTANT SOLUTIONS ON WETTABILITY OF ELASTOMERIC IMPRESSION MATERIALS: AN IN-VITRO STUDY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.1055-1063, August-2018, Available :http://www.jetir.org/papers/JETIR1808638.pdf

"A COMPARATIVE STUDY ON THE EFFECT OF FOUR DISINFECTANT SOLUTIONS ON WETTABILITY OF ELASTOMERIC IMPRESSION MATERIALS: AN IN-VITRO STUDY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp1055-1063, August-2018, Available at : http://www.jetir.org/papers/JETIR1808638.pdf