Aleisa Khalil
Associate Professor, Department of Prosthetic Dental Sciences College of Dentistry, King Saud University, Saudi Arabia, e-mail:
J Contemp Dent Pract. 2013 Jul 1;14(4):675-80. doi: 10.5005/jp-journals-10024-1384.
Post retention is crucial factor in restoration survival. Posts are commonly failed due to loss of retention. It is unknown which luting agents would provide the maximum bond strength for Locator overdenture posts.
The aim of this study was to evaluate the bond retentive strengths of Locator overdenture posts cemented with 7 luting agents.
One hundred and five single rooted human teeth were decoronated and randomly assigned to 7 groups (n = 15). Post spaces were prepared with Locator post drills to the depth of 6 mm. The Locator posts were cemented with Variolink II, RelyX ARC, Multilink N, RelyX Unicem, ParaCore, or MultiCore Flow resin luting agents. Zinc phosphate cement was served as control group. Specimens were stored in water at 37°C for 24 hours. Each specimen was loaded in tension in an Instron universal testing machine. The maximum force required to dislodge each Locator post was recorded. Means and standard deviations were calculated and data were statistically analyzed with one-way analysis of variance (ANOVA).
The highest mean bond strength value for Locator posts was recorded for MultiCore(®) Flow group (mean = 550.1 N), while the lowest mean value was for RelyX Unicem(™) resin cement group (mean = 216.8 N). A statistically significant difference in mean locator overdenture post bond strength was observed between the 7 cement types (p < 0.0001). ParaCore(™) and MultiCore(®) Flow groups had significantly higher bond strength than all other groups, but they were not differed from each other.
Bond strength of Locator overdenture posts were influenced by the type of luting agents. MultiCore Flow and ParaCore resin cements offered the greatest retention.
The type of luting agents had a significant effect on the retention of Locator posts. The use of Core buildup resin cements as luting agent with Locator post demonstrated the greatest retention.
桩的固位是修复体留存的关键因素。桩通常因固位丧失而失败。尚不清楚哪种粘接剂能为Locator覆盖义齿桩提供最大的粘结强度。
本研究的目的是评估用7种粘接剂粘结的Locator覆盖义齿桩的粘结固位强度。
105颗单根人牙去冠后随机分为7组（n = 15）。用Locator桩钻制备桩道至6 mm深度。Locator桩用Variolink II、RelyX ARC、Multilink N、RelyX Unicem、ParaCore或MultiCore Flow树脂粘接剂粘结。磷酸锌水门汀作为对照组。标本在37℃水中保存24小时。每个标本在Instron万能试验机上进行拉伸加载。记录每个Locator桩脱位所需的最大力。计算均值和标准差，并采用单因素方差分析（ANOVA）对数据进行统计学分析。
MultiCore(®) Flow组Locator桩的平均粘结强度值最高（均值 = 550.1 N），而RelyX Unicem(™)树脂水门汀组的均值最低（均值 = 216.8 N）。观察到7种水门汀类型之间Locator覆盖义齿桩的平均粘结强度存在统计学显著差异（p < 0.0001）。ParaCore(™)组和MultiCore(®) Flow组的粘结强度显著高于所有其他组，但它们之间无差异。
Locator覆盖义齿桩的粘结强度受粘接剂类型的影响。MultiCore Flow和ParaCore树脂水门汀提供了最大的固位力。
粘接剂类型对Locator桩的固位有显著影响。使用核桩树脂水门汀作为Locator桩的粘接剂显示出最大的固位力。
