Effect of Different Surface Treatment Methods on Adhesion and Retention of Root Canal Wall
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摘要:
目的 研究不同纤维桩表面处理方法对根管壁粘接固位力的影响。 方法 收集50颗半年内因正畸拔出的完整离体单根管下颌双尖牙，随机分为5组。A组：空白组；B组：硅烷偶联剂处理组；C组：选择性酸蚀处理组；D组：过氧化氢溶液处理组；E组：喷砂处理组；按统一标准制作力学测试件进行力学测试，扫描电镜观察处理后的纤维桩表面相貌。 结果 各组样本中拉力值最大值与最小值的比较：A组、B组、C组、D组、E组的最大值分别为13.16 MPa、13.42 MPa、18.31 MPa、22.67 MPa、21.05 MPa，最小值分别为8.9 MPa、8.94 MPa、12.98 MPa、17.69 MPa、14.39 MPa，D组、E组内的样本最大值及最小值均比A组大，且是5组实验样本中最大的。各实验组断裂模式的比较：通过卡方检验分析得出，断裂方式之间的差异具有统计学意义（α < 0.05），大多为粘接剂与纤维桩之间的粘接界面破坏，其中D组和E组以混合破坏占主导地位，而A组、B组和C组是I型粘结破坏占主导地位；4种不同的处理方法均不同程度的改变了玻璃纤维桩表面形貌，纤维束保存完整表面覆盖基质发生不同程度溶解。 结论 综合评价4种纤维桩表面处理方法得出经过氧化氢溶液处理和喷砂处理的纤维桩的粘接强度在这4种方法中是最强的，临床值得推广运用。 Abstract:Objective To explore the effect of different treatment methods on adhesion and retention of root canal wall of fiber post . Methods 50 single canal mandibular bicuspid teeth were collected and randomly divided into 5 groups. Group A was the control group; group B was treated with silane coupling agent; group C was the selective acid etching group; group D was treated with hydrogen peroxide solution, group E was the sandblasting treatment group. The mechanical test pieces were made according to the unified standard for mechanical test, and the surface appearance of the treated fiber pile was observed by scanning electron microscope. Results Co mparison of the maximum value and minimum value of tensile force in each group, the maximum values of group A, B, C, D and E were 13.16 MPa、13.42 MPa、18.31 MPa、 22.67 MPa and 21.05 MPa respectively, and the minimum values were 8.9 MPa, 8.94 MPa, 12.98 MPa, 17.69 MPa and 14.39 MPa respectively. The maximum and minimum values of samples in groups D and E were larger than those in group A, and were the largest among the five groups. Chi-square test was used to analyze the fracture modes of each experimental group, and the difference between the fracture modes was statistically significant （α < 0.05）. Most of the fracture modes were the bonding interface damage between the adhesive and the fiber pile. The mixed damage in groups D and E was dominant, while the type I bond damage in groups A, B and C was dominant. Four different treatment methods all changed the surface apperance of the glass fiber pile to different degrees, the integrity of the fiber bundle was preserved, and the surface covering matrix was dissolved at different degrees. Conclusion A comprehensive evaluation of the four surface treatment methods of fiber post suggests that the fiber post treated with hydrogen oxide solution and sandblasting treatment is the most significant to improve the bond strength, and the fracture mode of the bond interface is mainly mixed bond failure, which is worthy of clinical application . -
Key words:
- Fiber post /
- Surface treatment /
- Bonding strength
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图 13 试件粘接界面破坏模式柱状图
注：I型：粘接剂与纤维桩分离，纤维桩表面无粘接剂覆盖；Ⅱ型：粘接剂与根管壁分离，纤维桩表面为粘接剂覆盖；Ⅲ型：混合型粘接破坏，纤维桩表面部分有粘接剂覆盖，部分无粘接剂覆盖。
Figure 13. Histogram of damage modes of adhesive interface of group
表 1 各试件粘接强度数值（MPa）
Table 1. Bonding strength of each group （MPa）
组别 1 2 3 4 5 6 7 8 9 10 A组 10.52 8.9 12.3 10.75 9.74 11.37 10.77 13.16 9.31 8.96 B组 12.58 13.42 9.46 10.37 10.26 8.94 12.31 11.68 10.47 9.36 C组 15.48 16.37 12.98 17.68 18.31 14.64 16.26 15.39 14.96 13.96 D组 19.84 22.67 19.79 18.39 22.05 20.38 17.69 19.47 22.48 17.72 E组 17.36 14.39 18.46 16.79 19.38 21.05 20.43 19.68 15.95 18.52 
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表 2 各试件粘接强度平均值[MPa，（
$\bar x \pm s $ ）]Table 2. Average bond strength of each group [MPa，（
$\bar x \pm s $ ）]组别 样本 数值 A组 10 10.58 ± 1.41 B组 10 10.89 ± 1.52 C组 10 15.60 ± 1.62 D组 10 20.04 ± 1.86 E组 10 18.20 ± 2.08
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表 3 各试件粘接强度最大值与最小值（MPa）
Table 3. Maximum and minimum values of bonding strength of each group （MPa）
组别 样本 最大值 最小值 A组 10 13.16 8.9 B组 10 13.42 8.94 C组 10 18.31 12.98 D组 10 22.67 17.69 E组 10 21.05 14.39
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表 4 试件粘接界面破坏模式
Table 4. Damage modes of bonding interface of specimens
组别 A组 B组 C组 D组 E组 Ⅰ 10 10 7 2 3 Ⅱ 0 0 0 2 2 Ⅲ 0 0 3 6 5
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表 5 试件粘接界面破坏模式卡方检验
Table 5. Chi-square test of damage mode of bonding interface of specimens
方法 值 自由度 渐进显著性 皮尔逊卡方 25.938a 8 0.001 似然比（L） 32.595 8 0 线性关联 17.904 1 0
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