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1 Chinese Journal of Tissue Engineering Research November 18, 2016 Vol.20, No.47 ( ). [J] (47): DOI: /j.issn ORCID: () EmbraceCore TM Resin Cement :R318 :A : (2016) () EDTA EmbraceCore TM Resin Cement 25 5 (n=5)() 35% 15 s CLEARFIL TM SE BOND 20 s 35% 15 s single bond 2 CLEARFIL TM SE BOND 20 s CLEARFIL TM SE BOND 5 EmbraceCore TM Resin Cement (8.66±2.43) (7.05±3.03) (7.37±2.83) (9.88±2.93) (10.04±2.86)MPa(P < 0.05) (P > 0.05) A1 A2 B1 B2 A1 A2 A1 A2 B1 B2 EmbraceCore TM Resin Cement ISSN CN /R CODEN: ZLKHAH 7083

2 . Feng Xin-yan, M.D., Attending physician, Department of Stomatology, Peking University People s Hospital, Beijing100044, China Effects of pretreatment in post space on the bonding strength of self-adhesive resin cement to fiber posts Feng Xin-yan, Gao Cheng-zhi (Department of Stomatology, Peking University People s Hospital, Beijing100044, China) Abstract BACKGROUND: The bonding interface of resin cements with dentin is unstables, therefore, improvement on the bonding strength is of great significance. OBJECTIVE: To evaluate the effects of different pretreatments to post space on bonding strength of the self-adhesive resin cement EmbraceCore TM Resin Cement to fiber posts after phosphoric acid etching or self-etching. METHODS: Twenty-five human mandible canines or premolars with single-rooted canal were selected. After conventional root canal treatment and post space preparation, they were randomly divided into five groups (n=5 per group): group I (control group): 0.9% normal saline irrigation; group II: etching with 35% phosphoric acid for 15 seconds; group III: self-etching with CLEARFIL TM SE BOND binder for 20 seconds; group IV: etching with 35% phosphoric acid for 15 seconds and bonding with single bong 2; group V: self-etching with CLEARFIL TM SE BOND binder for 20 seconds and bonding with CLEARFIL TM SE BOND binder. Fiber posts were edusing self-adhesive resin cement EmbraceCore TM Resin Cement. The thin-slice push-out test was performed to record the bonding strengths, and the failure modes of fiber posts were observed by stereomicroscope. RESULTS AND CONCLUSION: The bond strength of groups IV were as follows: (8.66±2.43), (7.05±3.0), (7.37±2.83), (9.88±2.9), and (10.04±2.86) MPa. Groups II, IV and V showed significantly different bond strength from the group I (P < 0.05), but there were no significant differences between groups III and I (P > 0.05). The main failure models in the groups I, II and III were A1 and A2, and less B1 and B2 appeared. The failure modes in the groups IV and V also focused on the A1 and A2, but B1 and B2 increased gradually. These results indicate that neither the pretreatments by phosphoric acid etching nor by self-etching in root canal dentin can improve the bonding strength of EmbraceCore TM Resin Cement to fiber posts, but the use of binder relative to phosphoric acid etching or self-ctching is helpful. Subject headings: Tooth Preparation, Prosthodontic; Dental Cement; Tissue Engineering Cite this article: Feng XY, Gao CZ. Effects of pretreatment in post space on the bonding strength of self-adhesive resin cement to fiber posts. Zhongguo Zuzhi Gongcheng Yanjiu. 2016;20(47): Introduction [1-4] 3 [5-6] [7] [8] [9] [10] [11] [212-13] [714] [15-16] 7084 P.O. Box 10002, Shenyang

3 . [16-23] [22-23] EmbraceCore TM Resin Cement 1Materials and methods EmbraceCore TM Resin Cement(Pulpdent ) CLEARFIL TM SE BOND()35% Gluma TM Etch 35 Gel(Heraeus Kulzer) Adper TM Single Bond 2(3M ESPE)3# Macro-Lock Post IllusionX-RO (RTD)P(Mani )Starlight s(mectron, ) SYJ-150() AG-IS MO(Shimadzu) SMZ-B3(Nikon) mm 4.5 mm 70% mm 3 d 12# P 13# 10 mm3 mm 551 ( ) EmbraceCore TM Resin Cement3# 24 h 1.5 [24] 61 mm mm/minf S=π(d1+d2)h/2(Sd1d2 hπ=3.14) P=F/S 40 5A1 A2 B1 B2 C 1.6 SPSS17.0 (one-way ANOVA) (LSD-t ) P < 0.05 ISSN CN /R CODEN: ZLKHAH 7085

. 1 ( 40) Figure 1 The failure modes in push-out tests ( 40) a A1 b A2 c B1 d B2 1

ml CLEARFIL SE BOND20 s 35%15 s10 mladper Single Bond 2 15 s CLEARFIL SE BOND20

push-out tests in each group n A1 A1 A2 B1 B2 C 2Results A2 B1 B2 30 15 12 2 1 0 30

03)(7.37±2.83) (9.88±2.93)(10.04±2.86) MPa >>>> 5 (P < 0.05) (P > 0.05)(P < 0.05) 2.

4 . 1 ( 40) Figure 1 The failure modes in push-out tests ( 40) a A1 b A2 c B1 d B2 1 Table 1 Pretreatments in the post space root canal in each group () 10 ml 35%15 s10 ml CLEARFIL SE BOND20 s 35%15 s10 mladper Single Bond 2 15 s CLEARFIL SE BOND20 sclearfil SE BOND 15 s 2 (n) Table 2 Distribution of the failure modes after push-out tests in each group n A1 A1 A2 B1 B2 C 2Results A2 B1 B C 2.1 (8.66±2.43)(7.05±3.03)(7.37±2.83) (9.88±2.93)(10.04±2.86) MPa >>>> 5 (P < 0.05) (P > 0.05)(P < 0.05) 2.2 (C) A1A2B1B2 A1A2A1 A2B1B2 21 3Discussion [10] [25-27] [9] 7086 P.O. Box 10002, Shenyang

5 . [15-16] [22-23] () [28] [23] [29-31] CLEARFIL TM SE BOND () EmbraceCore TM Resin Cemet ISSN CN /R CODEN: ZLKHAH 7087

6 . 3 [616-23] [212-13] EmbraceCore TM Resin Cement EmbraceCore TM Resin Cement 67%() EmbraceCore TM Resin Cement EmbraceCore TM Resin Cement EmbraceCore TM Resin Cement CNKI 3 ( ) 4 References [1] Coelho CS,Biffi JC,Silva GR,et al.finite element analysis of weakened roots restored with composite resin and posts.dent Mater J.2009;28(6): [2],,.176 [J]., 2015, 44(32): [3]. [J].,2013,51(18): [4],,. [J]., 2014, 43(1): P.O. Box 10002, Shenyang

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Literaturverzeichnis: 1. Tay FR, Frankenberger R, Krejci I et al. (2004) Single-bottle adhesives behave as permeable membranes after polymerization. I

Literaturverzeichnis: 1. Tay FR, Frankenberger R, Krejci I et al. (2004) Single-bottle adhesives behave as permeable membranes after polymerization. I. In vivo evidence. J Dent 32: 611-621. 2. Frankenberger