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The International Journal of Prosthodontics



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Int J Prosthodont 8 (1995), No. 3     1. May 1995
Int J Prosthodont 8 (1995), No. 3  (01.05.1995)

Page 233-238

Tensile Bond Strength of Two Ceramic and Three Resin Composite Inlay Materials Placed Using a Resin Luting Agent
Thordrup / Isidor / Ravnholt
The tensile bond strength ofinlay materials to dentin was evaluated. Five materials, two direct resin composite inlay products, one hybrid resin composite, a preformed ceramic block, and a conventional porcelain material were bonded to bovine dentin and bonded together using a dual-polymerizing resin luting agent. Specimens were tested with and without thermocycling. Some bar-to-bar bonding groups fractured through the bar. Significantly higher (P<.05) bar-to-bar bonds were recorded than the bar-dentin bonds, irrespective of the inlay materials. VitaDur N Showed the lowest bar-to-bar failure values (7.6 MPa) compared to the four other inlay materials (14.4 MPa to 22.2 MPa), but had the highest dentin bond strength (4.5 MPa). Unexpectedly, thermal loading increased the bond strength to bovine dentin, although this was only statistically significant for VitaDur N. The dentin bond strength of Charisma (1.4 MPa) was inferior (P<.02) to all othe materials (2.6 MPa to 4.5 MPa) when thermocycled before testing.