The effect of in vitro corrosion on the ultimate tensile strength of pins in dentin
Marei, Mona K.
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Rebuilding badly broken-down teeth with pin retained amalgams or composite resin has become an important and popular service provided by the dentist. Teeth previously condemned to extraction are now being salvaged for further use as part of a splint, or as an abutment for fixed bridges or partial dentures. The use of retentive pins to anchor restorative material to a tooth structure is now a well established clinical procedure. Corrosion of intracoronal retentive pins has been observed in previous research (Mobasherat, Pameijer, 1978). The purpose of this investigation was to investigate whether initial corrosion affects the retention of pins in dentin. Various types of pins manufactured by different companies were tested, i.e., gold coated and stainless steel pins. The experimental group was stored in artificial saliva for a period of three (3) months in order to imitate corrosion. The control group was prepared just prior to the actual testing. All pins were exposed to tensile force on an Instron machine. The data indicates that there was no statistically significant difference between the experimental pin systems and their control groups. It is felt that the three (3) month period was not sufficient to determine the possible loss of retention due to corrosion.
PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact firstname.lastname@example.org.Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1981 (Prosthodontics)Bibliography : leaves 49-56.
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