The purpose of this in vitro study was 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. inlay with dual cement. The control group was directly filled with
Herculite XR after being etched and applied with dentin bonding agent. 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 sectioned.
@ES The obtained results were as follows:
@EN 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, Herculite XR-direct filling group and E.O.S. inlay at the gingival margin.
3. Generally, the marginal leakage was more greatly showed at the gingival margin that 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.
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