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The stress reducing capacity of unfilled resin in a Class V cavity
Author(s) -
Rees J. S.,
O'dougherty D.,
Pullin R.
Publication year - 1999
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1046/j.1365-2842.1999.00393.x
Subject(s) - composite material , class (philosophy) , materials science , stress (linguistics) , computer science , linguistics , philosophy , artificial intelligence
This study examined the stress reducing capacity of varying thicknesses of unfilled resin in a Class V cavity. A two dimensional plane strain mesh of a Class V cavity, 3 mm in diameter and 2 mm deep, was produced and the thickness of the unfilled resin layer was varied from 0 to 80 μm. A polymerization shrinkage of 1·5% was applied to the composite resin and the interfacial forces examined. The maximum shear stresses were found to occur along the pulpal floor of the restoration at the unfilled resin–dentine interface. The maximum shear stress values varied from 11·1 to 22·4 MPa and the shear stresses decreased by up to 38% as the thickness of the unfilled resin increased to 80 μm.