硼酸与传统冲洗液对纤维桩与根管牙本质间粘结强度的影响。

Effect of Boric Acid Versus Conventional Irrigation Solutions on the Bond Strength Between Fiber Post  and Root Dentin.

出版信息

J Adhes Dent. 2017;19(2):137-146. doi: 10.3290/j.jad.a38143.

DOI:10.3290/j.jad.a38143

Abstract

PURPOSE

To compare the effect of boric acid solutions of different percentages to conventional irrigation solutions on the adhesive bond strength between fiber posts and radicular dentin surface with different cement types.

MATERIALS AND METHODS

One hundred fifteen extracted human incisors were endodontically instrumented to a length of 14-15 mm, and 12-mm post spaces were prepared with specific drills. Cylindrical fiber posts (Panavia Post) were luted with two different composite cements (Panavia F 2.0, Panavia SA) and cut into 1-mm-thick slices. These specimens were randomly allocated to 5 groups according to the irrigant applied: 1. control, no irrigant; 2. 10 ml of 2% chlorhexidine; 3. 10 ml of 5.25% NaOCl for 5 min and 10 ml of 17% EDTA for 3 min; 4. 10 ml of 5% boric acid solution at a temperature of 55°C for 60 s; 5. 10% boric acid solution, conditions as in group 4. Bond strength was determined using the push-out test. Microscopic assessment and SEM evaluations were performed in combination with push-out tests.

RESULTS

The push-out bond strengths of cervical segments were significantly higher than for the middle and apical segments in all groups. The type of irrigation solution used significantly affected the bond strengths of the posts. The 10% boric acid solution and EDTA + NaOCl irrigation solutions provided the highest bond strengths (p < 0.005). SEM analysis showed that the dentin tubules were open and the smear layer was completely removed when EDTA/NaOCl and 10% boric acid were used as irrigation agents.

CONCLUSION

Boric acid solutions, especially at a concentration of 10%, can be a viable alternative to the conventional irrigants used during endodontic treatment. The extent to which the 10% boric acid solution successfully removed the smear layer and the ease of rinsing boric acid from the root surface are advantageous.

摘要

目的

比较不同浓度硼酸溶液与传统冲洗液对不同粘结剂类型纤维桩与根管牙本质表面粘结强度的影响。

材料和方法

将 115 颗人离体恒中切牙进行根管预备至 14-15mm 长，并用专用钻制备 12mm 的桩腔。用两种不同的复合树脂粘结剂（Panavia F 2.0、Panavia SA）粘结 Panavia 纤维桩（Panavia Post），并切割成 1mm 厚的薄片。根据应用的冲洗液，将这些样本随机分配到 5 组：1. 对照组，无冲洗液；2. 10ml 浓度为 2%的洗必泰；3. 5min 10ml 浓度为 5.25%的次氯酸钠和 3min 10ml 浓度为 17%的 EDTA；4. 55°C 温度下 60s 的 10ml 浓度为 5%的硼酸溶液；5. 组 4 条件下的 10%硼酸溶液。采用推出试验测定粘结强度。结合推出试验进行微观评估和 SEM 评价。