Jotttnal of Otal Rehabilitation, 1992, Volume 19, pages 21-29

Effects of ultrasonic instrumentation on microleakage in composite restorations with glass ionomer liners C.J. ARCORIA, J.P. GONZALEZ, B.A. WITASEKf

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M . J . W A G N E R * Departtitetit of Operative Dentistry atid '^'Departtnent of Biochetnistry, : j Baylor College of Detttistry. Dallas, Te.xas, U.S.A.. attd fChal-B Laboratoties. Redwood City, ' Califorttia.

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Summary . . . , The aim of this study was to determine the effeet of ultrasonie instrumentation on composite resin restorations lined with glass ionomer cement by measuring the extent of dye penetration at the restoration/tooth interface. Preparations, 2-0 mm in diameter and 2-5 mm in depth, were made with a 331 bur in 96 human molar teeth without a bevel. The teeth were restored with glass ionomer eement liners (Shofu) and one of two types of eomposite resin (Silux® and P-30®). Half of the samples were ultrasonically instrumented for 10 s. The teeth were immersed in 0-5% methylene blue dye solution and vertieally sectioned. Mieroleakage was scored visually using a seale of 0 to 4. Statistical comparisons were made with / ' analysis and the Marin-Whitney t/-test at the F

Effects of ultrasonic instrumentation on microleakage in composite restorations with glass ionomer liners.

The aim of this study was to determine the effect of ultrasonic instrumentation on composite resin restorations lined with glass ionomer cement by mea...
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