Bond strength of ceramic brackets with various bonding systems
Abstract
The purpose of this investigation was to determine the shear and tensile bond strengths of various ceramic and ceramic-filled brackets in combination with commonly used bonding systems, One monocrystalline, two polycrystalline and one ceramic-filled plastic bracket types were tested in combination with one light-cured and two chemically-cured bonding systems. Bonding procedures were performed on properly prepared human teeth. Shear and tensile tests were performed on an Instron test machine. The shear bond strength of the mono-and polycrystalline ceramic brackets was not affected by the bonding system. There was a difference among bonding systems used with the ceramic-filled plastic bracket. Ceramic-filled plastic and polycrystalline ceramic brackets exhibited the greatest resistance to tensile force, while monocrystalline brackets showed the highest propensity for tensile fracture of the wings.
Contributor Notes
S.J. Chaconas is a Professor and Clinical Director of the Section of Orthodontics at the University of California Los Angeles
A.A. Caputo is a Professor and Chairman of the Section of Biomaterials Science at the University of California Los Angeles
G.S. Niu is in private practice in Irvine, California