Microtensile bonding of resin fiber reinforced post to radicular dentin using resin cement

Jin-Woo Kim; Mi-Kyung Yu; Se-Joon Lee; Kwang-Won Lee

doi:10.5395/JKACD.2003.28.1.080

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Kim, Yu, Lee, and Lee: Microtensile bonding of resin fiber reinforced post to radicular dentin using resin cement

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2003; 28(1): 80-88.

Published online: 31 January 2003

DOI: https://doi.org/10.5395/JKACD.2003.28.1.080

Microtensile bonding of resin fiber reinforced post to radicular dentin using resin cement

Jin-Woo Kim, Mi-Kyung Yu, Se-Joon Lee, Kwang-Won Lee

Department of Conservative Dentistry & Institute for Oral Bioscience, College of Dentistry, Chonbuk National University, Korea.

Corresponding author (lkw@moak.chonbuk.ac.kr)

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Object

The purpose of this study were to evaluate the microtensile bond strength of resin fiber reinforced post to radicular dentin using resin cement according to various dentin surface treatment and to observe the interface between post and root dentin under SEM.

Material and Method

A total 16 extracted human single rooted teeth were used.

A lingual access was made using a #245 carbide bur in a high-speed handpiece with copious air water spray. The post space was mechanically enlarged using H-file(up to #60) and Gates Glidden bures(#3). This was followed by refining of the canal space using the calbrating drill set provided in ER Dentinpost(GEBR, BRASSELER GmbH&Co. KG).

The 16 teeth were randomly distributed into 4 group of 4 teeth.

Group 1 teeth had their post space prepared using 10% phosphoric acid as root canal surface treatment agent during 20s. The canal was then rinsed with saline and dried with paper point.

Group 2 teeth had their post space prepared using 3% NaOCl as root canal surface treatment agent during 30min. The canal was then rinsed with saline and dried with paper point.

Group 3 teeth had their post space prepared using 17% EDTA as root canal surface treatment agent during 1min. The canal was then rinsed with saline and dried with paper point.

Group 4 teeth had their post space prepared using 17% EDTA as root canal surface treatment agent during 1min. After rinsing with saline, the canal was rinced 10ml of 3% NaOCl for 30min.

After drying with paper point, the post(ER Dentinpost, GEBR, BRASSELER GmbH&Co. KG) was placed in the treated canals using resin cement. Once the canal was filled with resin cement(Super bond C&B sunmedical co. Ltd.), a lentulo was inserted to the depth of the canal to ensure proper coating of the root canal wall.

After 24 hours, acrylic resin blocks(10·10·50mm) were made. The resin block was serially sectioned vertically into stick of 1·1mm. Twenty sticks were prepared from each group. After that, tensile bond strengths for each stick was measured with Microtensile Tester.

Failure pattern of the specimen at the interface between post and dentin were observed under SEM.

Results

1. Tensile bond strengths(meen±SD) were expressed with ascending order as follows ; group 4, 12.52±6.60 ; group 1, 7.63±5.83 ; group 2, 4.13±2.31 ; group 3, 3.31±1.44.

2. Tensile bond strengths of Group 4 treated with 17% EDTA +3%NaOCl were significant higher than those of group 1, 2 and 3 (p<0.05).

3. Tensile bond strengths of Group 1 treated with 10% phosphoric acid were significant higher than those of group 2 (p<0.05). Tensile bond strengths of Group 4 treated with 17% EDTA +3% NaOCl was significant higher than those of other groups.

Figures and Tables

Fig. 1

Schematic illustration of serial section of tooth.

Fig. 2

Section of teeth.

Fig. 3

Specimen preparation for testing.

Fig. 4

The specimen was glued to jig with cyanoacrylate cement.

Fig. 5

Isomet saw(Buehler Ltd.,Lake Bluff.IL).

Fig. 6

Microtensile bond strength tester.

Fig. 7

Bar graph of bond strengths of experimental Groups.

Fig. 8

Post surface of fractured specimen of group 1 (SEM×1000).

Fig. 9

Dentin surface of fractured specimen of group 1 (SEM×1000).

Fig. 10

Post surface of fractured specimen of group 2 (SEM×500).

Fig. 11

Dentin surface of fractured specimen of group 2 (SEM×1000).

Fig. 12

Dentin surface of fractured specimen of group 3 (SEM×1000).

Fig. 13

Post surface of fractured specimen of group 3 (SEM×500, RC;resin cement, D;dentin).

Fig. 14

Dentin surface of fractured specimen of group 4 (SEM×1000).

Fig. 15

Post surface of fractured specimen of group 4 (SEM×1000).

Table 1

Materals used in this study.

Table 2

Experimental Groups.

Table 3

Tensile bond strengths of experimental Groups(MPa).

Table 4

Comparision of microtensile bond strengths among Groups.

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