Journal of Prevention and Treatment for Stomatological Diseases ›› 2017, Vol. 25 ›› Issue (12): 779-783.doi: 10.12016/j.issn.2096-1456.2017.12.006

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Effect of different treatment methods of polymeric porcelain surface on its adhesion to metal brackets

Li JI1(), Zhinong ZHU2, Wenwei LIAN1(), Dongfang LI1()   

  1. 1. Department of Prothodontics The Affiliated Stomatological Hospital of Nanchang University Nanchang 330006 China
    2. Department of Oral and Maxillofacial Surgery The Affiliated Stomatological Hospital of Nanchang University; The Key Laboratory of Oral Biomedicine Nanchang 330006 China
  • Received:2017-02-21 Revised:2017-04-23 Online:2017-01-04 Published:2018-09-03

Abstract:

Objective To analyze and discuss the effect of 4 different surface treatment methods on the bonding effect between polymerization porcelain and metal bracket s. Methods 45 polymer-ceramics specimens were made and 40 of them were selected and randomly divided into 5 groups according to different surface treatment methods. A group:surface without special treatment. B group: 9.6% hydrofluoric acid gel combine with bonding agent, C group: 9.6% hydrofluoric acid gel combine with silane, D group: 35% phosphoric acid gel combine with bonding agent, E group: 35% phosphoric acid gel combine with silane. All specimens were stored in water for 24 hours at 37 ℃ after bonding 10 min utes and then cycled 500 cycles (5 ℃ to 55 ℃). To measure the shear bonding strength and record the damage cases and the adhesive remnant index. Results The shear strength values were: 3.24 in the control group, 7.24 MPa in the hydrofluoric acid etching treatment group. 10.78 MPa in the hydrofluoric acid gel combined with silane group. 4.17 MPa in the phosphoric acid-only group, 6.84 MPa in the phosphoric acid gel combined with silane group. The results of each group were statistically different from those of the other four groups (P < 0.001). The rate of breakage after the removal of brackets of the hydrofluoric acid gel combined with silane group is higher than the others. Conclusion As to the high shear bonding strength and low rate of breakage after the removal of brackets, we recommend 35% phosphoric acid etching combining with silane coupling agent in clinical.

Key words: Po lymeric porcelain, Orthodontic, Metal brackets, Surface treatment, Shear strength

CLC Number: 

  • R783.5

Table 1

Shear Bond Strength (MPa) between metal brackets and ceramage under different surface treatments n=8, MPa"

组别 均值 ± 标准差 均值的 95% 置信区间
下限 上限
A 3.238 ± 0.066 3.183 3.293
B 7.244 ± 0.0591) 7.194 7.294
C 10.778 ± 0.0661)2) 10.723 10.832
D 4.173 ± 0.0601)2)3) 4.123 4.223
E 6.841 ± 0.0661)2)3)4) 6.786 6.895

Table 2

Statistical analysis of the five groups of specimens interface failure mode n=8"

组别 破坏形式
被粘体的内聚破坏 界面破坏 粘接剂内聚破坏 混合破坏
A 0 8 0 0
B 5 0 0 3
C 8 0 0 0
D 0 8 0 0
E 1 7 0 0

Table 3

Adhesive remnant index of the ceramage polymer-ceramics surface after the removal of brackets"

组别 粘接剂残留指数 聚合瓷折裂
0分 1分 2分 3分 4分
A 8 0 0 0 0 0
B 0 1 2 0 0 5
C 0 0 0 0 0 8
D 8 0 0 0 0 0
E 7 0 0 0 0 1

Figure 1

The surfaces of ceramage polymer-ceramics after different surface treatment ( × 1 000)"

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