Warning: mkdir(): Permission denied in /home/virtual/lib/view_data.php on line 81

Warning: fopen(upload/ip_log/ip_log_2024-12.txt): failed to open stream: No such file or directory in /home/virtual/lib/view_data.php on line 83

Warning: fwrite() expects parameter 1 to be resource, boolean given in /home/virtual/lib/view_data.php on line 84
Influence of Sodium Ascorbate on Microtensile Bond Strengths to Pulp Chamber Dentin treated with NaOCl


Your browser does not support the NLM PubReader view.

Go to this page to see a list of supporting browsers.

Influence of Sodium Ascorbate on Microtensile Bond Strengths to Pulp Chamber Dentin treated with NaOCl

Article information

Restor Dent Endod. 2008;33(6):545-552
Publication date (electronic) : 2008 November 30
doi : https://doi.org/10.5395/JKACD.2008.33.6.545
Soo-Yeon Jeon, Kwang-Won Lee, Mi-Kyung Yu
Department of Conservative Dentistry, School of Dentistry, Chonbuk National University, Korea.
Corresponding Author: Mi-Kyung Yu. Department of Conservative Dentistry, School of Dentistry, Chonbuk National University, Geumam-Dong, Deokjin-Gu, Jeonju, Jeonbuk, 561-712, Korea. Tel: 82-63-250-2045, Fax: 82-63-250-2129, mkyou102@hanmail.net
Received 2008 August 13; Revised 2008 September 09; Accepted 2008 October 14.

Abstract

The purpose of this study was to evaluate the influence of sodium ascorbate on microtensile bond strengths of total-etching adhesive system to pulp chamber dentin treated with NaOCl.

Pulp chambers of extracted human non-caries permanent molars were treated as follows: group 1, with 0.9% NaCl; group 2, with 5.25% NaOCl; group 3, with 5.25% NaOCl and 10% sodium ascorbate for 1min; group 4, with 5.25% NaOCl and 10% sodium ascorbate for 1 min and 10ml of water; group 5, with 5.25% NaOCl and 10% sodium ascorbate for 5 min; group 6, with 5.25% NaOCl and 10% sodium ascorbate for 5 min and 10ml of water; group 7, with 5.25% NaOCl and 10% sodium ascorbate for 10 min; group 8, with 5.25% NaOCl and 10% sodium ascorbate for 10 min and 10ml of water. Treated specimens were dried, bonded with a total-etching adhesive system (Single bond), restored with a composite resin(Z250) and kept for 24h at 100% humidity to measure the microtensile bond strength.

NaOCl-treated group (group 2) demonstrated significantly lower strength than the other groups. No significant difference in microtensile bond strengths was found between NaCl-treated group (group 1) and sodium ascorbate-treated groups (group 3-8). The results of this study indicated that dentin treated with NaOCl reduced the microtensile bond strength of Single bond. Application of 10% sodium ascorbate restored the bond strength of Single bond on NaOCl-treated dentin. Application time of sodium ascorbate did not have a significant effect.

Keywords: Microtensile bond strengths; NaOCl; Pulp chamber dentin; Sodium ascorbate; Total etching adhesive system

References

1. Gutmann JL. The dentine-root complex : anatomic and biologic considerations in restoring endodontically treated teeth. J Prosthet Dent 1992. 67458–467.
2. Wagnild GW, Mueller KI. In : Cohen S, Burns RC, eds. Restoration of endodontically treated tooth. Pathways of the pulp 1994. ed 7th ed. St. Louis: Mosby; 691–717.
3. Ray HA, Trope M. Periapical status of endodontically treated teeth in relation to the technical qualty of the root filling and the coronal restoration. Int Endod J 1995. 2812–18.
4. Ausiello P, De Gee AJ, Rengo S, Davidson CL. Fracture resistance of endodontically-treated premolars adhesively restored. Am J Dent 1997. 10237–241.
5. Hernandez R, Bader S, Boston D, Trope M. Resistance to fracture of endodontically treated premolars restored with new generation dentine bonding systems. Int Endod J 1994. 27281–284.
6. Belli S, Zhang Y, Pereira PN, Pashley DH. Adhesive sealing of the pulp chamber. J Endod 2001. 27521–526.
7. Lim YA, Yoo YD, Lee YK, Lee SJ, Im MK. The Effect of Smear Layer Removal and Position of Dentin on Shear Bond Properties of Dentin Bonding Systems to Internal Cervical Dentin. J Korean Acad Conserv Dent 1999. 24465–472.
8. Cho JY, Jin MU, Kim YK, Kim SK. The Influence of AH-26 and Zinc Oxide-Eugenol Root Canal Sealer on the Shear Bond Strength of Composite Resin to Dentin. J Korean Acad Conserv Dent 2006. 31147–152.
9. Nikaido T, Takano Y, Sasafuchi Y, Burrow MF, Tagami J. Bond strength to endodontically-treated teeth. Am J Dent 1999. 12177–180.
10. Lai SC, Mak YF, Cheung GS, Osorio R, Toledano M, Carvalho RM, Tay FR, Pashley DH. Reversal of compromised bonding to oxidized etched dentin. J Dent Res 2001. 80(10)1919–1924.
11. Morris MD, Lee KW, Agee KA, Bouillaguet S, Pashley DH. Effects of sodium hypochlorite and RC-Prep on bond strengths of resin cement to endodontic surfaces. J Endod 2001. 27(12)753–757.
12. Vongphan N, Senawongse1 P, Somsiri W, Harnirattisai C. Effects of sodium ascorbate on microtensile bond strength of total-etching adhesive system to NaOCl treated dentine. J Dent 2005. 33(8)689–695.
13. Rueggeberg FA, Margeson DH. The effect of oxygen inhibition on an unfilled/filled composite system. J Dent Res 1990. 691652–1658.
14. Weston CH, Ito S, Wadgaonkar B, Pashley DH. Effects of time and concentration of sodium ascorbate on reversal of NaOCl-induced reduction in bond strengths. J Endod 2007. 33(7)879–881.
15. Gutteridge JM. Biological origin of free radicals, and mechanisms of antioxidant protection. Chem Biol Interact 1994. 91133–140.
16. VanDuijn MM, Tijssen K, VanSteveninck J, Van Den Broek PJ, Van Der Zee J. Erythrocytes reduce extracellular ascorbate free radicals using intracellular ascorbate as an electron donor. J Biol Chem 2000. 27527720–27725.
17. Torneck CD, Titley KC, Smith DC, Adibfar A. Adhesion of light-cured composite resin to bleached and unbleached bovine dentin. Endod Dent Traumatol 1990. 697–103.
18. Inai N, Kanemura N, Tagami J, Watanabe LG, Marshall SJ, Marshall GW. Adhesion between collagen depleted dentin and dentin adhesives. Am J Dent 1998. 11123–127.
19. Pioch T, Kobaslija S, Schagen B, Gotz H. Interfacial micromorphology and tensile bond strength of dentin bonding systems after NaOCl treatment. J Adhes Dent 1999. 1135–142.
20. Frankenberger R, Kramer N, Oberschachtsiek H, Petschelt A. Dentin bond strength and marginal adaption after NaOCl pre-treatment. Oper Dent 2000. 2540–45.
21. Prati C, Chersoni S, Pashly DH. Effect of removal of surface collagen fibrils on resin-dentin bonding. Dent Mater 1999. 15323–331.
22. Rose RC, Bode AM. Biology of free radical scavengers : an evaluation of ascorbate. FASEB J 1993. 71135–1142.

Article information Continued

Copyright © 2008 The Korean Academy of Conservative Dentistry
(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.

Figure 1

Figure 1

Schematic of specimen preparation.

Figure 2

Figure 2

Upper view of Micro Tensile Tester.

Figure 3

Figure 3

Diagram of microtensile bond strengths between eight experimental groups

Figure 4

Figure 4

0.9% NaCl (1K).

Figure 5

Figure 5

0.9% NaCl (5K).

Figure 6

Figure 6

5.25% NaOCl (1K)

Figure 7

Figure 7

5.25% NaOCl (5K)

Figure 8

Figure 8

NaOCl+sodium ascorbate(1K)

Figure 9

Figure 9

NaOCl+sodium ascorbate (5K)

Figure 10

Figure 10

NaOCl + sodium ascorbate + water (1K)

Figure 11

Figure 11

NaOCl + sodium ascorbate + water (5K)

Table 1

Experimental groups and treatments

Table 1

Table 2

Means and standard deviations of the microtensile bond strength of experimental groups to dentin of pulp chamber wall

Table 2