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Faculty of Dentistry
Document Details
Document Type
:
Article In Journal
Document Title
:
A Comparative Study On The Effect Of Two Laser Treatments On The Shear Dentin
دراسة مقارنة لتأثير نوعين من المعالجة السطحية على قوة ربط القصية للراتنج على العاج والميناالسينة
Document Language
:
English
Abstract
:
Great advances in laser technology have occurred in the field of dentistry. The application of different lasers on hard tissue was investigated since 1964. But now having Er-YAG and Nd -YAG coupled with cooling streams of water, they can effectively remove the dental hard tissue forming a rough surface that might be suitable for resin bonding. In this study the shear bond strength of composite resin to acid, Er-YAG and Nd- YAG lasers etched enamel and dentin were measured and the topographical difference on enamel and dentin surfaces were further studied using the (SEM) on extracted human teeth. The Nd- YAG laser used on hard tooth structures in this study was at 320mJ/pulse at pulse frequency of 8 Hz. Also, Er-YAG was used at 200mJ/pulse at a rate of 3 Hz with cooling water spray for both. The control group was ac id etched with 37% phosphoric acid for 15 seconds. Shear bond strength was tested at a crosshead speed of 2mm/min. There was no significant difference among the three groups of composite bonded to enamel. However, significant difference (P < .05) between acid versus Nd-YAG, and acid versus Er-YAG on dentin. When the bond strength of each group was compared between enamel and dentin, the dentin lazed with Nd -YAG was significantly lower in shear bond strength than enamel (P<.05). Enamel lazed with Nd-YAG and Er- Y AG showed similar topographical changes. In both conditions enamel exhibited raised flaky protuberances with cracking and crazing of the surface . The dentin lazed with Er-YAG exhibited more pronounced hills and valley like appearance more than dentin lazed with Nd-YAG.
ISSN
:
1
Journal Name
:
Alexandria Dental Journal
Volume
:
23
Issue Number
:
1
Publishing Year
:
1998 AH
1998 AD
Article Type
:
Article
Added Date
:
Thursday, December 6, 2007
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
هناء جمجوم
Jamjoom, Hana
Investigator
Doctorate
hjamjoom@kau.edu.sa
عمرو محروس
Mahrous, Amr
Researcher
Doctorate
Files
File Name
Type
Description
A Comparative Study On The Effect Of Two Laser Treatments On The Shear Bond Strength Of Composite To Enamel And Dentin.pdf
pdf
عربيA COMPARATIVE STUDY ON THE EFFECT OF TWO LASER TREATMENTS ON THE SHEAR BOND.pdf
pdf
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