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| Year : 2003 | Volume
: 6
| Issue : 2 | Page : 45-50 |
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Polymerization Shrinkage Of Packable Resin Composites In Air - A Strain Gauge Study
Johncen George, C. V. N Rao, L Lakshmi Narayanan
Correspondence Address:
Johncen George
 Source of Support: None, Conflict of Interest: None  | Check |
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Polymerization shrinkage is one of the most critical properties of resin based esthetic restorative materials. Post operative pain, fracture of the tooth, opening of the margins of restorations which may result in microleakage of fluids, staining of marginal gaps and recurrent caries, are the clinical problems caused by polymerization shrinkage. This study investigated the polymerization shrinkage of two packable resin composites Surefil and Solitaire in air using a strain gauge. The composite specimens were light polymerized with visible light curing system and the dimensional change during different time intervals of 20 sec., 40 sec., 60 sec., 2 mins., 10 mins., 30 mins., 1 hrs., 2 hrs., 3 hrs., 1 day, 3 days, 5 days and 7 days was monitored. The results showed that Surefil exhibited significantly lower polymerization shrinkage than Solitaire, however, the initial shrinkage of Solitaire upto 40 sec. was less compared to Surefil. |
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