纤维桩和粘接系统对粘接界面形态及破坏方式影响的研究  

Morphological and failure mode study of different fiber posts luted with different adhesive systems to root dentin

作　　者：张晓[1] 李津乐[2] 郝亮[2] 

机构地区：[1]郑州大学口腔医院口腔修复科,郑州450052 [2]口腔疾病研究国家重点实验室,四川大学,成都610041

出　　处：《华西口腔医学杂志》2011年第2期132-135,共4页West China Journal of Stomatology

摘　　要：目的比较不同粘接系统粘接2种纤维桩后在桩道不同深度的粘接界面形态和界面破坏方式。方法选取36颗新鲜上颌前磨牙,将其分成A、B、C、D组,A组:自粘接树脂黏固剂和POPO玻璃纤维桩;B组:全酸蚀粘接系统和POPO玻璃纤维桩;C组:自粘接树脂黏固剂和Para Post玻璃纤维桩;D组:全酸蚀粘接系统和Para Post玻璃纤维桩。根管充填、桩道预备后粘接纤维桩于根管中。制备厚约1 mm薄片推出实验试样,万能力学测试机进行加载,体视显微镜观察粘接界面气泡率、裂缝率和破坏方式。结果对于粘接界面树脂层气泡率,B组(64.2%)、D组(66.7%)显著高于A组(5.8%)、C组(13.7%)(P<0.001)。D组粘接界面裂缝率(41.2%)显著高于A组(13.5%)和C组(11.8%)(P<0.008 3)。除A组与B组间外(P=0.69),其余各组试件破坏方式间差异有统计学意义(P<0.008 3)。结论粘接界面树脂层气泡率与使用的树脂粘接系统有关;纤维桩-树脂-牙本质粘接界面形态特征与破坏方式间存在差异,2个界面的性能共同决定纤维桩桩道内的粘接固位能力;纤维桩和粘接系统间存在显著的相互作用。Objective To investigate the correlation of morphological characteristics and failure modes of two types of glass-fiber posts luted with self-adhesive resin cement and etch-and-rinse adhesive system.Methods Thirty-six intact single-rooted premolars were collected and removed the crown.After root canal therapy,teeth were randomly divided into 4 groups.Group A： Self-adhesive with POPO fiber post.Group B： Etch-and-rinse with POPO fiber posts.Group C： Self-adhesive with Para Post.Group D： Etch-and-rinse with Para Post.Each root was sectioned into six 1 mm-thick serial slices and a push-out test was performed.The dentin-cement-post adhesive interface of each specimen and failure modes after fracture were evaluated by stereomicroscope observation.Results Interface morphology observe indicated that voids present in group B（64.2%） and D（66.7%） were significantly higher than group A（5.8%） and C（13.7%）（P0.001）.Interface gaps appeared at the resin-dentine interface in group D（41.2%） were significantly higher than group A（13.5%） and C（11.8%）（P0.008 3）,and the failure modes in each group were significantly different（P0.008 3） except for group A and B（P=0.69）.Conclusion Voids present in cement layer were associated with the luting agent involved.Morphological characteristics of the fiber post-resin luting agent-root dentin adhesive interface were discrepant with failure modes in different root region.There were interaction between adhesive systems and fiber posts.

关 键 词：纤维桩 自粘接树脂黏固剂 界面形态学 

分 类 号：R783.1[医药卫生—口腔医学]