Iranian Dental Association Journal of Iranian Dental Association 3060-8201 18 1 2006 04 01 Comparison of water absorption and solubility of Acropars and Viscogel tissue conditioners 105 111 EN Fariba Golbidi Bahar Behdadmehr Journal Article 2007 04 30 2013 02 25 Comparison of water absorption and solubility of Acropars and Viscogel tissue conditioners Dr. F. Golbidi*- Dr. B. Behdadmehr** *- Assistant Professor of Prosthodontics Dept.-Faculty of Dentistry – Isfahan University of Medical Sciences. ** - Dentist. Background and Aim: Soft denture lining materials have been used in dentistry for almost a century. The aim of this study was to measure water absorption and solubility of Acrosoft tissue conditioner samples and compare them with those of Viscogel samples. Materials and Methods: In this in vitro study, stainless steel molds were prepared in disk shape of 0.5±0.05 mm thickness and 50±7 mm diameter. Fifteen specimens were prepared from each material. At first, all of them were weighed and place into distilled water at 37 °C for 24 hours. Then they were removed and reweighed. These procedures were also repeated at 4 and 7 days. After 7 days, specimens were dried in a desicator at 37 C, removed and finally reweighed. Data were subjected to student T – test. Results: The mean values of water absorption at 24 h, 4 and 7 days were 1.4394±0.0146, 1.384±0.0078 and 1.3595±0.0027 percent for Viscogel gel and 1.2423±0.0260, 1.5520±0.0236 and 2.0537±0.0273 percent for Acropars. Statistical analysis showed significant differences in the mean water absorption at different time periods (P<0.001). Moreover, Acrosoft showed higher solubility (1.7452±0.0234 percent) than Viscogel (1.6850±0.0227 percent). This difference was also statistically significant (P<.0.001). Conclusion: Water absorption and solubility of Acrosoft samples were significantly higher than those of Viscogel samples. Key words: Water absorption – Solubility – Tissue conditioner – Soft liner.