The purpose of this in vitro study was to evaluate the marginal microleakage of Class II composite resin inlay restoration and to compare the marginal leakage of inlay with indirectly placed composite restoration and that of direct filling
composite
restoration. MO or DO cavity preparations were cut in 60 extracted human permanent molars. The experimental group was restored with Herculite XR inlay, Clearfil inlay, and E.O.S. in lay with dual cement. The specimens were thermocycled 1,000
times
between 5℃and 55℃. Microleakage was evaluated by use of the Methylene bule staining technique. The depth of microleakage was measured with stereomicroscope after the teeth were sectioned.
The obtained results were as follows :
1. The marginal leakage was reduced in the order of Clearfil inlay, Herculite XR- inlay, E.O.S. inlay, and Herculite XR-direct filling group at the occlusal margin.
2. The marginal leakage was reduced in the order of Clearfil inlay, Herculite XR-inlay, Herculited XR-direct fillig group and E.O.S. inlay at the gingival margin.
3. generally, th4 marginal leakage was more greatly showed at the gingival margin than at the occlusal margin.
4. The marginal leakage was greatest at the gingival margin of E.O.S. inlay, and was the least at the occlusal margin of Clearfil inlay.
|