engleski

Microleakage evaluation of composite restoratives

Almost total understanding of microleakage was obtained using the method of extracting the filling out of the cavity and observing the pattern of dye leakage. The aim of this study was to evaluate three restorative systems by observing microleakage using this method. Fortyeight intact premolars extracted for orthodontic reasons have received buccal cervical cavities of uniform dimensions. Teeth were divided in four groups of twelve and restored (Group 1 - T.P.H. + Prime&Bond 2.0. ; Group 2 - Heliomolar + Syntac S.C. ; Group 3 - Tetric + Syntac S.C. ; control group 4 - Fuji II LC). Teeth were thermocycled, protected with wax, immersed in acid resistant ink (Rotring Ink) for 24 hours, then immersed in 5% nitric acid (3 days) until softened enough to pull the fillings out of their cavities. Leakage pattern was observed on extracted fillings and maximal depth of leakage (scores or levels from 0 to 4) was measured through a dissecting microscope. Results show that leakage occurred at levels 1 and 2 in Group 1 in 10/12 specimen (83.3%), in Group 2 in 4/12 (33.3%), in Group 3 in 2/12 specimen (16.6%) and in Group 4 in 8/12 (58.3%). Differences between Groups 1 and 4 were not statistically significant (P<0.05). Differences between Groups 2 and Groups 3 and 4 were not statistically significant (P<0.05). Differences between Groups 3 and 4 were statistically significant (P<0.05). Although differences between some groups were significant to evaluate certain material further investigation should be performed using this method of investigation.

microleakage; evaluation; restoratives

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