Effect of Er,Cr:YSGG laser on the Bonding strength of the elderly non-carious sclerotic dentin
LIU yan
FU qiang
GE Zhi-hua
JIA Xing-ya
Abstract：AIM:To evaluate the effect of Er , Cr:YSGG laser preparation on the bonding properties be-tween composite resin and the the sclerotic dentin of elderly subjects .METHODS:40 extracted premolars with cervi-cal wedge-shaped defect and sclerotic dentin on the surface from 60~70 year-old people were randomly divided into 2 groups (n=20).In the experimental group Er,Cr:YSGG laser was used for cavity preparation , in the control group regular burs with high-speed turbines was used for cavity preparation .The cavies of all teeth were filled with composite resin Filtek Z350.15 samples in each group were cut into dumbbell-shaped specimens with a bonding area of 1 mm2 . The micro-tensile bond strength (MBS) was tested on Instron 5848 Micro Tester.Each tooth of the remaining 5 sam-ples in each groupe were divided into two parts along buccolingual directions parallel to the long axis of the tooth .The bonding interface was observed by SEM .RESULTS: The MBS ( MPa ) of experimental and control groups was (35.24 ±7.05)MPa and(27.56 ±4.79)MPa respectively(P<0.05).SEM observation showed that hybrid layer be-tween sclerotic dentin and composite resin was thinner in experimental group , resin tags, and crystallizing column with-in dentinal tubules connected together tightly .CONCLUSION:Er,Cr:YSGG laser preparation can improve the bond strength between elderly non-carious sclerotic dentin and composite resin .
Keywords：ErCr:YSGG lLasermicro-tensile bond strengthselderlynon-caries sclerotic dentincomposite resin
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 530-533 )