Share Email Print

Proceedings Paper

Effect of Nd:YAG laser on dentinal bond strength
Author(s): Douglas N. Dederich; John Tulip
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Carbon dioxide laser energy has been shown to possess the ability of enhancing dentinal bond strength of a recently introduced dentinal bonding agent. It is presently unclear as to whether Nd-YAG laser energy can have the same effect. The objective of this study was to measure the effect of Nd-YAG laser pretreatment of dentin on the dentinal bond strength. Thirty extracted molars were mounted vertically in an acrylic base, to a depth of their cervical lines. The bottom of the base was flattened, and a plane perpendicular to this base was ground into one buckle surface of each molar. This exposed a dentin surface 6 mm or greater in diameter. These teeth were randomly distributed into two groups, with 15 teeth per group. Brass rings of approximately 5 mm in diameter were placed on these flat surfaces, and filled using Scotchbond 2 (3M) and P-50 (3M) composite material as per manufacturer's instructions. The experimental group was treated identically to the control group with the exception of laser treatment of the dentin at 51 Watts/cm2 for 0.2 sec. before application of Scotchbond 2. After curing, these restorations were shear tested using an Instron machine at 0.1 in/min. crosshead speed. The mean shear strength and standard deviation for the control group were 1.29, 1.74 MPa, and for the irradiated group 1.05, and 1.07 MPa, respectively. Students t-test found no significant difference (P equals 0.2914) between the groups. It does not appear that, at these powers, the Nd-YAG laser possesses the ability to enhance the bond strength of Scotchbond 2 dentinal bonding agent.

Paper Details

Date Published: 1 May 1991
PDF: 4 pages
Proc. SPIE 1424, Lasers in Orthopedic, Dental, and Veterinary Medicine, (1 May 1991); doi: 10.1117/12.44000
Show Author Affiliations
Douglas N. Dederich, Univ. of Pittsburgh (United States)
John Tulip, Univ. of Alberta (Canada)

Published in SPIE Proceedings Vol. 1424:
Lasers in Orthopedic, Dental, and Veterinary Medicine
Stephen J. O'Brien; Douglas N. Dederich; Harvey Wigdor; Ava Micky Trent, Editor(s)

© SPIE. Terms of Use
Back to Top