三种自粘接树脂水门汀与牙本质的剪切粘接强度。

Shear bond strength of three self-adhesive resin cements to dentin.

作者信息

Farrokh Asefzadeh, Mohsen Merati, Soheil Salari, Nazanin Bashardoost

机构信息

Mashhad University of Medical Sciences, Mashhad, Iran.

出版信息

Indian J Dent Res. 2012 Mar-Apr;23(2):221-5. doi: 10.4103/0970-9290.100430.

DOI:10.4103/0970-9290.100430

PMID:22945713

Abstract

CONTEXT

The result of the studies concerning the bonding of self-adhesive resin cements to dentin is controversial.

AIMS

To assess in vitro shear bond strength (SBS) of three self-adhesive dual-cured resin cements to dentin compared to a currently used dual-cured resin cement, using SBS test.

SETTINGS AND DESIGN

The extant study is an experimental in vitro one on extracted human third molars dentin.

MATERIAL AND METHODS

40 intact human third molars were selected and randomly divided into 4 groups of 10. Buccal dentin surfaces were exposed perpendicular to the long axis and prepared with SiC papers. A translucent plastic ring, was placed over the dentin surfaces. Group I (Control group): After 15 s of etching and application of Excite DSC Bond (Ex), Variolink II (Var II) resin cement was injected into the plastic ring and was light cured for 40 s. Group II: RelyX Unicem (RX) was injected into the plastic ring and after 30 s, was light cured for 40 s. Group III: Maxcem (Mc) was injected into the plastic ring and after 30 s, was light cured for 40 s. Group IV: Multilink Sprint (MS) was injected into the plastic ring and after 30 s, was light cured for 40 s. After thermal cycling, SBS were measured with a universal testing machine.

STATISTICAL ANALYSIS USED

Statistical computations were conducted according to Student's t-test.

RESULTS

The mean SBS and standard deviations (in parentheses) for groups I, II, III, and IV were 12.95 (2.64), 6.73 (0.79), 3.01 (0.90), 4.60 (0.75) MPa, respectively. Statistical analysis, revealed that: (1) the mean SBS of Var II were significantly higher than the other groups (P<0.05). (2) The mean SBS of Mc and MS were significantly lower than RX (P<0.05). (3) The mean SBS of Mc and MS did not show significant difference (P>0.05).

CONCLUSION

Bond strength of three self-adhesive resin cements was significantly lower than the conventional total-etch resin cement. RX significantly performed better SBS than Mc and MS to dentin.

摘要

背景

关于自粘树脂水门汀与牙本质粘结的研究结果存在争议。

目的

使用剪切粘结强度（SBS）测试，评估三种自粘双固化树脂水门汀与牙本质的体外剪切粘结强度，并与目前使用的双固化树脂水门汀进行比较。

设置与设计

现有研究是一项关于拔除的人类第三磨牙牙本质的体外实验。

材料与方法

选取40颗完整的人类第三磨牙，随机分为4组，每组10颗。将颊侧牙本质表面垂直于长轴暴露，并用碳化硅砂纸进行预备。在牙本质表面放置一个半透明塑料环。第一组（对照组）：酸蚀15秒并涂布Excite DSC Bond（Ex）后，将Variolink II（Var II）树脂水门汀注入塑料环并光固化40秒。第二组：将RelyX Unicem（RX）注入塑料环，30秒后光固化40秒。第三组：将Maxcem（Mc）注入塑料环，30秒后光固化40秒。第四组：将Multilink Sprint（MS）注入塑料环，30秒后光固化40秒。热循环后，用万能试验机测量SBS。

所用统计分析方法

根据学生t检验进行统计计算。

结果

第一组、第二组、第三组和第四组的平均SBS及标准差（括号内）分别为12.95（2.64）、6.73（0.79）、3.01（0.90）、4.60（0.75）MPa。统计分析显示：（1）Var II的平均SBS显著高于其他组（P<0.05）。（2）Mc和MS的平均SBS显著低于RX（P<0.05）。（3）Mc和MS的平均SBS无显著差异（P>0.05）。