3种树脂水门汀对可切削玻璃陶瓷粘接后断裂强度的影响  

Effect of three resin cement on fracture strength of cemented machinable glass ceramic

作　　者：黄宏 张鹏 黎日照 

机构地区：[1]湛江南方口腔医院,广东湛江524005 [2]佛山市口腔医院同济西门诊部

出　　处：《口腔疾病防治》2016年第6期341-344,共4页Journal of Prevention and Treatment for Stomatological Diseases

基　　金：佛山市院市合作项目(2014HT10008);湛江市非资助科技攻关项目(2015B01036)

摘　　要：目的研究3种树脂水门汀对可切削玻璃陶瓷粘接后断裂强度的影响。方法收集人离体磨牙60颗,垂直牙长轴磨除面釉质;将IPS e.max CAD瓷块加工成片状试件,用体积分数9.5%氢氟酸凝胶处理后,随机分成3组,每组20个,分别使用Multilink&#174;N多功能粘接系统+Monobonds-S(A组)、Rely X?Ultimate树脂水门汀+Scotchbond?通用粘接剂(B组)、Rely X?Unicem 2树脂水门汀(C组)进行粘接;每组瓷片粘接后再分成1、2两个亚组,每组10个,A1、B1、C1组不进行冷热循环,A2、B2、C2组进行冷热循环。在万能试验机上测试所有瓷片的断裂载荷。结果 A1、A2、B1、B2、C1、C2组的试件断裂载荷值分别为:(1 763±128)N、(1 563±115)N、(1 861±135)N、(1 676±137)N、(1 446±153)N、(1 038±95)N。各组试件断裂载荷差异存在统计学意义(F=52.279,P<0.001),不同种树脂水门汀(F=94.104,P<0.001)、冷热循环(F=63.818,P<0.001)分别对瓷片断裂载荷有显著影响。LSD检验结果显示,A、B、C 3组试件断裂载荷值差异具有统计学意义(P<0.05),其中B组的断裂载荷最高,C组最低。结论不同种树脂水门汀对瓷片粘接后断裂强度的影响不同,同时处理瓷片和牙面的树脂水门汀可提高瓷片粘接后的断裂强度。冷热循环降低粘接后瓷片的断裂强度。Objective To evaluate the effect of three different resin cement on fracture strength of cemented machinable IPS e.max CAD specimens and provide guides for clinical luting procedure. Methods Sixty human molars were collected, and occlusal enamel were removed; IPS e. max CAD blocks were processed into plate-shape and etched with 9.5% hydrofluoric acid. All specimens were randomly divided into three groups(n = 20) and received there different luting treatments,(group A: Multilink&#174;N+ Monobonds-S, group B: Rely X? Ultimate+ Scotchbond? adhesive, group C: Rely X? Unicem 2). Then each group were divided into two sub-groups(group 1: the control group, group 2 received thermal cycling). Fracture load was measured with a universal testing machine. The results were analyzed by two-way ANOVA and LSD test. Results Fracture load of each group were A1(1 763 ± 128)N、A2(1 563 ± 115)N、B1(1 861 ±135)N、B2(1 676 ± 137)N、C1(1 446 ± 153)N、C2(1 038 ± 95)N. Significant differences of fracture load were observed among all groups(F = 52.279, P<0.001). Resin cement(F = 94.104, P<0.001) and thermal cycling(F = 63.818, P<0.001) affected the fracture load significantly. LSD test showed that significant differences of fracture load were observed among group A, B and C(P<0.05). Group B illustrated the highest fracture load where as group C demonstrated the lowest one. Conclusion Resin cement that treats the ceramic and dentin surface simultaneously will strengthen the fracture load of the glass ceramic. Thermal cycling will reduce the fracture strength of cemented glass ceramic.

关 键 词：离体牙 断裂强度 可切削玻璃陶瓷 树脂水门汀 冷热循环 

分 类 号：R783.3[医药卫生—口腔医学]