Email Alert | RSS

Journal of Peking University(Health Sciences) ›› 2019, Vol. 51 ›› Issue (5): 968-972. doi: 10.19723/j.issn.1671-167X.2019.05.030

Previous Articles     Next Articles

Evaluation of modified micro-push-out bond strength of glass fiber posts with chemically treated resin cements

Qian CHEN1,Xin-zhi WANG2,△()   

  1. 1. Second Clinical Division,Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100101, China
    2. Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
  • Received:2017-09-22 Online:2019-10-18 Published:2019-10-23
  • Contact: Xin-zhi WANG E-mail:xinzwang@sina.com.cn

RICH HTML

   

PDF (PC)

Abstract:

Objective: To evaluate the modified micro-push-out bond strengths of prefabricated glass fiber posts with silaneafter 35% phosphoric acid to resin cements. Methods: In the study, 40 glass fiber posts were randomly divided into 2 groups (20 posts in each group) for different surface treatments. Group 1, treated with silaneafter 35% phosphoric acid;group 2, no surface treatment (Control group). Then each group was randomly divided into 2 minor groups (modified group and traditional group), with each group with 10. So the four groups were group 1M (phosphoric acid + silane-modified), group 1T (phosphoric acid + silane-traditional), group 2M (control-modified), and group 2T (control-traditional). A modified micro-push-out bond strength test method was used in modified groups. In traditional groups, the 20 extracted human, single-rooted teeth were endodontically treated. Gutta-percha was removed with #1-2 Peeso Reamers (Mani), and the post space of each specimen was enlarged with a standard drill system from the corresponding fiber post system to create a 9 mm post space with at least 4 mm of filling material in the root apex. Following post cementation according to the manufacturer’s instructions, the traditional micro-push-out bond strengths were tested using a universal testing machine(0.5 mm/min). Both failure modes were examined with a stereomicroscope. The data of the four groups were statistically analyzed using the one-way ANOVA test(α= 0.05). Results: The bond strengths were (18.85±1.42) MPa for group 1M, (19.39±1.35) MPa for group 1T, (11.26±1.57) MPa for group 2M, and (11.27±1.83) MPa for group 2T. The bond strength of Group 1 was significantly higher than that of group 2(P<0.05), no matter which method was used. The fracture mode 100% in group M was the destruction of the post/resin interface, compared with 65.7% in group T. Conclusion: In contrasted to the traditional micro-push-out test, the modified test can evaluate the bond strength of fiber post to resin cement more effectively, and 35% phosphate acid + silane treatment can improve the bonding strength.

Key words: Modified, Micro-push-out, Glass fiber posts, Phosphate acid, Silane

CLC Number: 

  • R783.1

Table 1

Surface treatment of fiber posts in groups"

Group (post n=40) Surface treatment
Group 1, 30% phosphoric
acid+silane (n=20)		 The posts surface was ultrasonically cleaned in ethanol before use (50 Hz, 0.5 h) for 30 seconds followed by air drying, immersion in 35% phosphoric acid. A silane coupling agent (Prosil; FGM) was applied with a microbrush and left to dry 60 seconds according to the manufacturer’s instruction
Group 2, control (n=20) The posts surface was ultrasonically cleaned in ethanol before use (50 Hz, 0.5 h) for 30 seconds, dried

Table 2

Fiber post cemented of modified and traditional micro-push-out"

Tests Specific steps of fiber post cemented
Modified micro-push-out 1. Mix base past and catalyst paste into a homogenous paste within 20 seconds using a spatula according to the
manufacturer’s instructions. Avoid incorporating air bubbles. Apply the mixed cement evenly to the mold, a
Teflon post (special design RTD; 30 μm thicker than the #1 post) was used for 9 mm. The cement was cured for
20 seconds (Figure 1)
2. The teflon post was removed and freshly mixed cement was inserted into the space left by the Teflon post, followed
by the definitive placement of the fiber post (Figure 2)
Traditional micro-push-out 1. Twenty extracted human, single-rooted teeth were endodontically treated
2. Gutta-percha was removed with #1-2 peeso reamers (Mani), and the post space of each specimen was enlarged
with a standard drill system from the corresponding fiber post system to create a 9 mm post space with at least
4 mm of filling material in the root apex. The post space was rinsed with distilled water and dried with paper points.
3. Fiber posts for each group were cemented to the root canals with adhesive resin cement, according to the
manufacturer’s instructions

Figure 1

Step 1 of modifiedmicro-push-out"

Figure 2

Step 2 of modified micro-push-out"

Figure 3

Schematic illustration of measuring the test specimen"

Table 3

Micro push-out bond strength values in groupsand the distribution of failure modes"

Group
(n=10)		 Treatment Bond strength/MPa,
x?±s		 failure modes, n
Adhesive p/r* Adhesive d/r* Cohesive Mixed
1M 30%phosphoricacid+silane modified micro-push-out 18.85±1.42 60 - 0 0
1T 30%phosphoricacid+silane 19.39±1.35 44 10 5 1
2M traditional micro-push-out no treatment 11.26±1.57 60 - 0 0
2T modified micro-push-out no treatment
traditional micro-push-out		 11.27±1.83 35 16 4 5
[1] Soares CJ, Soares PV, de Freitas Santos-Filho PC, et al. The influence of cavity design and glass fiber posts on biomechanical behavior of endodontically treated premolars[J]. J Endod, 2008,34(8):1015-1019.
[2] Savychuk A, Manda M, Galanis C , et al. Stress generation in mandibular anterior teeth restored with different types of post-and-core at various levels of ferrule[J]. J Prosthet Dent, 2018,119(6):965-974.
[3] Strefezza C, Amaral MM, Quinto J Jr , et al. Effect of 830 nm diode laser irradiation of root canal on bond strength of metal and fiber post[J]. Photomed Laser Surq, 2018,36(8):439-444.
[4] Goracci C, Tavares AU, Fabianelli A , et al. The adhesion between fiber posts and root canal walls: comparison between microtensile and push-out bond strength measurements[J]. Eur J Oral Sci, 2004,112(4):353-361.
[5] Par M, Tarle Z, Hickel R , et al. Dentin bond strength of experimental composites containing bioactive glass: changes during aging for up to 1 year[J]. J Adhes Dent, 2018,20(4):325-334.
[6] Garcia C, Ruales-Carrera E, Prates LH , et al. Effect of different irrigations on the bond strength of self-adhesive resin cement to root dentin[J]. J Clin Exp Dent, 2018,10(2):e139-e145.
[7] Roydhouse RH . Punch-shear test for dental purposes[J]. J Dent Res, 1970,49:131-136.
[8] Garcia PP, da Costa RG, Garcia AV , et al. Effect of surface treatments on the bond strength of CAD/CAM fiber glass posts[J]. J Clin Exp Dent, 2018,10(6):e591-e597.
[9] Bohrer TC, Fontana PE, Wandscher VF , et al. Endodontic sealers affect the bong strength of fiber posts and the degree of conversion of two resin cements[J]. J Adhes Dent, 2018,20(2):165-172.
[10] Tuncdemir AR, Buyukerkmen EB, Celebi H , et al. Effects of postsurface treatments including femtosecond laser and aluminum-oxide airborne-partical abrasion on the bond strength of the fiber posts[J]. Niqer J Clin Pract, 2018,21(3):350-355.
[11] Shafiei F, Saadat M, Jowkar Z . Effect of laser heat treatment on Pull-out bond strength of fiber posts treated with different silanes[J]. J Clin Exp Dent, 2018,10(5):e413-e418.
[12] Feilzer AJ, De Gee AJ, Davidson CL . Setting stress in composite resin in relation to configuration of the restoration[J]. J Dent Res, 1987,66(11):1636-1639.
[13] Tay FR, Loushine RJ, Lambrechts P , et al. Geometric factors affecting dentin bonding in root canals: a theoretical modeling approach[J]. J Endod, 2005,31(8):584-589.
[14] Patierno JM, Rueggeberg FA, Anderson RW , et al. Push-out and SEM evaluation of resin composite bonded to internal cervical dentin[J]. J Endod Dent Traumatol, 1996,12(5):227-236.
[15] Bolhuis P, De Gee A, Feilzer A . The influence of fatigue loading on the quality of the cement layer and retention strength of carbon fiber post resin composite core restorations[J]. Oper Dent, 2005,30(2):220-227.
[16] Lin G, Geubelle PH, Sottos NR . Simulation of fiber debonding with friction in a model composite pushout test[J]. Int J Solids Struct, 2001,38(2):8547-8562.
[17] Soares CJ, Santana FR, Castro CG , et al. Finite element analysis and bond strength of a glass post to intraradicular dentin: comparison between microtensile and push-out tests[J]. Dent Mater, 2008,24(10):1405-1411.
[18] Belwalkar VR, Gade J, Mankar NP . Comparison of the effect of shear bond strength with silane and other three chemical presurface treatments of a glass fiber-reinforced post on adhesion with a resin-based luting agent: an in vitro study[J]. Contemp Clin Dent, 2016,7(2):193-197.
[19] Pyun JH, Shin TB, Lee JH , et al. Effects of hydrogen peroxide pretreatment and heat activation of silane on the shear bond strength of fiber-reinforced composite posts to resin cement[J]. J Adv Prosthodont, 2016,8(2):94-100.
[20] Cecchin D, Farina AP, Vitti RP , et al. Acid etching and surface coating of glass-fiber posts: bond strength and interface analysis[J]. Braz Dent J, 2016,27(2):228-233.
[21] Mosharraf R, Baghaei Yazdi N . Comparative evaluation of effects of different surface treatment methods on bond strength between fiber post and composite core[J]. J Adv Prosthodont, 2012,4(2):103-108.
[22] Aksornmuang J, Foxton RM, Nakajima M , et al. Microtensilebond strength of a dual cure resin core material to glass and quartz fibreposts[J]. J Dent, 2004,32(6):433-450.
[1] Qiwei WANG, Pengyu BAO, Shihao HONG, Xin YANG, Yu WANG, Yongping CAO. Therapeutic effect of modified femoral neck osteotomy on the surgical treatment of ankylosing spondylitis with severe flexion deformity [J]. Journal of Peking University (Health Sciences), 2024, 56(5): 884-889.
[2] Jian-xun MA,You-chen XIA,Bi LI,Hong-mei ZHAO,Yu-tao LEI,Xi BU. Choice of immediate breast reconstructive methods after modified radical mastectomy [J]. Journal of Peking University (Health Sciences), 2023, 55(4): 612-618.
[3] Yuan ZHANG,Jian-min HAN,Lin LIU,Xu-liang DENG. Study of bond strength of one-piece glass fiber posts-and-cores with flared root canals in vitro [J]. Journal of Peking University(Health Sciences), 2019, 51(2): 327-334.
[4] CHEN Qian, SU Yong-liang, CAI Qing, BAI Yun-yang, SU Jing, WANG Xin-zhi. Comparative research for micro-push-out bond strengths of glass fiber posts treated by poly-dopamine or silane coupling agent [J]. Journal of Peking University(Health Sciences), 2015, 47(6): 1005-1009.
[5] LI Zhi-Hong, LIU Dan, HE Zi-Jing, FAN Zhi-Yi. Influence of dexamethasone on the incidence of postoperative nausea and vomiting in breast cancer patients with neoadjuvant chemotherapy [J]. Journal of Peking University(Health Sciences), 2015, 47(4): 685-689.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Peking University (Health Sciences), All Rights Reserved.
Powered by Beijing Magtech Co. Ltd