摘要
目的研究不同粘结方法及冷热循环对Cerec全瓷冠粘结后抗折强度的影响。方法选择离体前磨牙80颗，进行Cerec全瓷冠预备及制作。随机分为1～4组，每组20颗，分别使用Variolink N树脂粘结剂＋硅烷偶联剂粘结、Variolink N树脂粘结剂粘结、BiscoChoice 2树脂粘结剂＋硅烷偶联剂粘结、BiscoChoice 2树脂粘结剂粘结；每组再分为A、B小组，分别不进行和进行冷热循环。8组试件均用万能力学实验机测试其全瓷冠最大抗折裂强度，观察所有标本粘结破坏形式；进行统计分析。结果使用Variolink N树脂粘结剂＋硅烷偶联剂组粘结的Cerec全瓷冠抗折裂强度最高；全瓷冠抗折强度A组（非冷热循环）高于B组。差异有统计学意义（P〈0．05）。结论双重固化树脂粘结系统是牙科长石质陶瓷粘结的理想选择，可以获得较高的抗折裂强度。冷热循环降低Cerec全瓷冠抗折裂强度。
Objective Study of different bonding methods and thermal cycle on breaking strength of Cerec all-ceramic crowns after bonding. Methods 80 in vitro premolars were selected for Cerec all-ceramic crown preparation and were randomly divided into 4 groups（ n = 20） according to their luting agent：Group 1 ：Variolink N resin binder and silane coupling agent; Group 2：Variolink N resin based luting material; Group 3 ：Bisco ChoiceTM 2 resin adhesive and silane coupling agent; Group 4：Bisco ChoiceTM 2 resin adhesive. Each group was divided into A（without thermal cycling） and B（ with thermal cycling） subgroups. The maximum breaking strength of the all-ceramic crowns was tested by the universal mechanical testing machine, the bond failure forms were recorded, and statistical analysis was done there-after. Results Group 1 ,using the Variolink~ N resin based luting material and silane coupling agent, got the highest fracture strength of Cerec all-ceramic crowns among all the luting agents. Non thermal cycling subgroup was higher than that of thermal cycling subgroup in flexural strength of all-ceramic crowns. The difference was statistically significant （ P 〈 0.05 ）. Conclusions The dual-cured resin based luting cement system is the ideal choice for dental feldspathic ceramic bonding, and can get a higher breaking strength. The breaking strength of Cerec all-ceramic crowns can be reduced by thermal cycling.
出处
《口腔医学》
CAS
2014年第2期114-117,共4页
Stomatology
基金
上海交通大学"医工(理)交叉研究基金"(YG2010MS 13)
关键词
粘结剂
全瓷冠
抗折裂强度
冷热循环
luting agent
all-ceramic crowns
breaking strength
thermal cycling
