Statement of problem

Extrusion of excess cement into the subgingival area around implant-supported crowns is associated with detrimental inflammatory response, but controlling this excess material remains a challenge.

Purpose

The purpose of this in vitro study was to perform a comparative analysis of 3 extraoral cementation techniques to reduce excess extruded cementation material around implant-supported crowns.

Material and methods

Forty-four internal connection implant replicas were embedded in acrylic resin to form the experimental model. Cementable abutments were tightened onto the implants. Zirconia crowns were luted to each of the cementable abutments by using 1 of 4 techniques: control, pattern resin analog that was 3D-printed, fast-setting polyvinyl siloxane analog, and putty index analog. Extruded excess cement was collected at each luted crown and weighed.

Results

The mean residual weight of excess cement found in the pattern resin analog technique group was the least (0.087 mg), followed by the polyvinyl siloxane analog technique group (1.678 mg). The putty index analog technique group reported the least reduction of excess extruded cement (7.621 mg). All techniques produced substantially less extruded cement than the control (85.166 mg). In a 1-way analysis of variance, statistically significant differences (P<.001) were found among all the test techniques. Pairwise comparisons also found that all 3 test techniques were statistically different from each other.

Conclusions

The pattern resin (3D-printed) analog technique produces the least amount of extruded excess cement at an implant-supported crown, limiting detrimental impact on peri-implant tissue health.

中文翻译：

---

使用 3 种口外粘接技术比较种植体冠缘周围多余的粘接剂

问题陈述

将多余的水泥挤入种植体支持的牙冠周围的龈下区域与有害的炎症反应有关，但控制这种多余的材料仍然是一个挑战。

目的

这项体外研究的目的是对 3 种口外粘接技术进行比较分析，以减少种植体支撑牙冠周围多余的挤出粘接材料。

材料与方法

将 44 个内部连接植入体复制品嵌入丙烯酸树脂中以形成实验模型。可粘合基台被紧固到种植体上。通过使用以下 4 种技术中的一种，将氧化锆牙冠固定到每个可粘接基台上：对照、3D 打印的图案树脂类似物、快速固化聚乙烯硅氧烷类似物和腻子指数类似物。在每个牙冠处收集挤出的过量水泥并称重。

结果

在模式树脂模拟技术组中发现的过量水泥的平均残余重量最小（0.087 毫克），其次是聚乙烯硅氧烷模拟技术组（1.678 毫克）。腻子指数模拟技术组报告的过量挤出水泥减少最少（7.621 毫克）。所有技术产生的挤出水泥都比对照（85.166 毫克）少得多。在方差的单向分析中，发现所有测试技术之间存在统计学上的显着差异 ( P <.001)。成对比较还发现，所有 3 种测试技术在统计上彼此不同。

结论

图案树脂（3D 打印）模拟技术在种植体支撑的牙冠处产生最少的挤出过量水泥，限制了对种植体周围组织健康的不利影响。