4种玻璃离子水门汀对ITI基台与金属内冠之间粘接力的比较研究

A comparative study on adhesive force of cast crown copings cemented to ITI abutments using four glass ionomer cements

目的研究4种玻璃离子类水门汀对ITI种植系统标准颈粘接固位基台和金属内冠之间的粘接力。方法将10只金属内冠与10只ITI标准颈粘接固位基台分别使用以下4种水门汀进行交叉粘固:A组为玻璃离子水门汀(日本);B组为树脂加强型玻璃离子水门汀(美国);C组为暂时粘固用玻璃离子水门汀(日本);D组为玻璃离子水门汀(德国);粘固后测试并记录样本粘接力(N),同时观察并记录粘固界面的断裂模式,最后,对粘接力进行统计学处理。所有内冠和基台经清洗后重复使用。结果 4种水门汀的粘接力及由大至小的排列顺序为C组(183.6±29.4)N>D组(153.4±36.2)N>B组(144.4±41.1)N>A组(109.9±25.7)N,其中C组的粘接力最高,A组的粘接力最低,A组显著低于其它3种水门汀(P<0.05)。对样本的断裂面观察显示,A组和D组样本断裂面发生在水门汀和基台表面之间,而B组和C组样本的断裂面则呈现混合断裂的模式。结论 2种玻璃离子水门汀和树脂加强型玻璃离子水门汀都具有临床可接受的粘接力,而暂时粘固用玻璃离子水门汀因粘接力太大,不适用对种植牙冠进行暂时粘固。

Objective The aim of this study was to evaluate the adhesive force of between ITI regular neck cementable abutments and cast crown copings with four glass ionomer cements. Methods 10 prefabricated cast copings and 10 ITI regular neck cementable abutments were cross-cemented with the following 4 luting ce-ments：a conventional glass ionomer cements as group A （Fuji I, GC, Japan）, a resin modified glass ionomer ce-ments as group B （RelyX Luting, 3M ESPE, USA）, a provisional glass ionomer cements as group C （Fuji Temp, GC, Japan） and a glass ionomer cements as group D（Ketac Cem Easymix, 3M ESPE, Germany）. The cemented specimens were subjected to a debonding test, and then the adhesive force for each specimen was recorded, calcu-lated in Newton and analyzed with SPSS 16.0（n=10,α=0.05）. Meanwhile, the fracture mode for each specimen was also recorded. The cast crown copings and the abutments were cleansed and reused. Results Adhesive forces＆amp;nbsp;for the 4 luting cements were ranked as follows：C （183.6 ±29.4N）〉D（153.4±36.2N）〉B（144.4±41.1N）〉A （109.9±25.7N）. Group C produced the highest adhesive force, while group A exhibited the lowest adhesive force, significantly lower than other three luting cements（P〈0.05）. The fracture surface observation shows that group A and D fractured at the interface of cement and abutments, while group B and C exhibited as“mixed fracture”mode. Conclusion Both conventional glass ionomer cement and resin-modified glass ionomer cements possessed the clinically acceptable adhesive forces, while the provisional glass ionomer luting cements was not suitable for the provisional cementation of implant crowns due to the too high adhesive force.