Publication: Effect of 4% HF etching intervals on microtensile bond strength of fiber posts to resin composite cores
Accepted Date
2010-08-25
Issued Date
2010-09
Resource Type
Language
eng
ISSN
0125-5614 (printed)
Rights
Mahidol University
Rights Holder(s)
Faculty of Dentistry Mahidol University
Bibliographic Citation
Asawaworarit W, Piyawattanatawon W, Senawongse P. Effect of 4% HF etching intervals on microtensile bond strength of fiber posts to resin composite cores. M Dent J. 2010; 30(3): 153-62.
Suggested Citation
Widcha Asawaworarit, วิชชา อัศววรฤทธิ์, Wisit Piyawattanatawon, วิศิษฎ์ ปิยะวัฒนาถาวร, Pisol Senawongse, พิศลย์ เสนาวงษ์ Effect of 4% HF etching intervals on microtensile bond strength of fiber posts to resin composite cores. Asawaworarit W, Piyawattanatawon W, Senawongse P. Effect of 4% HF etching intervals on microtensile bond strength of fiber posts to resin composite cores. M Dent J. 2010; 30(3): 153-62.. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/1084
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Title
Effect of 4% HF etching intervals on microtensile bond strength of fiber posts to resin composite cores
Alternative Title(s)
กำลังแรงยึดไมโครเทนไซล์ระหว่างเรซินคอมโพสิตชนิดทำแกนกับเดือยชนิดเส้นใยที่ถูกกัดด้วยกรดไฮโดรฟลูออกริก 4% ในช่วงเวลาต่างๆ
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Abstract
Objective: This study investigated the effect of different etching intervals
of 4% HF on the microtensile bond strength of fiber posts to the resin
composite cores.
Materials and methods: Forty fiber posts were randomly divided into
5 groups. The posts of groups 1-4 were treated with 4% hydrofluoric acid
(HF) for 15,30,45 and 60 sec, respectively and silanized for 60 sec. The
posts of group 5 were silanized for 60 sec and served as the control
group. After surface treatment, two posts from each group were randomly
selected to examine the post surface using a SEM. The remaining posts
were core built up with Multicore flow using a cylindrical plastic matrix as a
mold. The posts and resin composite cores were sectioned into stick specimens
and subjected to microtensile bond strength test. The microtensile
bond strength was analyzed using One-way ANOVA and Dunnett T 3 at
0.05 significance level. The fracture mode was examined using an SEM
and analyzed using Kruskal-Wallis.
Results: The microtensile bond strength of all experimental groups was
significantly higher than those obtained from the control group (p<0.05).
Among the experimental groups, the microtensile bond strength of group 1
was higher than those of groups 3 and 4. The fracture modes of the experimental
groups were adhesive and cohesive failure while the posts in the
control group revealed adhesive failure. Statistical analysis showed that
the experimental groups demonstrated a significant difference from the
control group (p<0.05).
Conclusion: Etching the fiber posts with 4% HF increased the microtensile
bond strength of the fiber posts to the resin composite cores. The etching
interval of 15 sec showed significantly higher microtensile bond strength
compared to the groups of 45 and 60 sec.