北京大学学报（医学版）2015，Vol.47Issue(6)：990-993,4.DOI:10.3969/j.issn.1671-167X.2015.06.018
聚乳酸可吸收根管桩与3种粘接剂的粘接强度
Bond strengths of absorbable polylactic acid root canal post with three different adhe-sives
潘徽 1程灿 2胡嘉 1刘鹤 1孙志辉1
作者信息
- 1. 北京大学口腔医学院·口腔医院儿童口腔科,北京 100081
- 2. 北京大学第三医院口腔科,北京 100191
- 折叠
摘要
Abstract
Objective:To find absorbable adhesives with suitable bonding properties for the absorbable polylactic acid root canal post. To test and compare the bond strengths of absorbable polylactic acid root canal post with three different adhesives. Methods:The absorbable polylactic acid root canal posts were used to restore the extracted teeth, using 3 different adhesives: cyanoacrylates, fibrin sealant and glass ionomer cement. The teeth were prepared into slices for micro-push-out test. The bond strength was statistically analyzed using ANOVA. The specimens were examined using microscope and the failure mode was divided into four categories:cohesive failure between absorbable polylactic acid root canal posts and adhesives, cohesive failure between dentin and adhesives, failure within the adhesives and failure within the absorbable polylactic acid root canal posts. Results:The bond strength of cyanoacrylates [(16. 83 ± 6. 97) MPa] and glass ionomer cement [(12. 10 ± 5. 09) MPa] were significantly higher than fibrin sealant [ ( 1 . 17 ± 0 . 50 ) MPa ] , P <0 . 001 . There was no significant difference between cyanoacrylates and glass ionomer cement (P =0. 156). In the group of cyanoacrylates, the cohesive failure between the absorbable polylactic acid root canal posts and the adhesives was 25 . 0%, the cohe-sive failure between the dentin and the adhesives was 16. 7%, the failure within the adhesives was 33. 3%, and the failure within the absorbable polylactic acid root canal posts was 25 . 0%. In the group of fibrin sealant , the cohesive failure between the absorbable polylactic acid root canal posts and the adhesives was 66 . 7%, the cohesive failure between the dentin and the adhesives was 22 . 2%, the failure within the ad-hesives was 11. 1%. In the group of glass ionomer cement, the cohesive failure between the absorbablepolylactic acid root canal posts and the adhesives was 87. 5%, the failure within the adhesives was 12. 5%. The major failure mode in fibrin sealant and glass ionomer cement was the cohesive failure between the absorbable polylactic acid root canal posts and the adhesives. No major failure modes were found in the group of cyanoacrylates. Conclusion:The bond strength of fibrin sealant is low, which cannot meet the requirement of clinical use. The bond strengths of cyanoacrylates and glass ionomer cement are suitable for clinical use. The cyanoacrylates are a kind of absorbable adhesive which has suitable bonding proper-ties for the absorbable polylactic acid root canal post.关键词
龋齿/聚乳酸/根管桩/粘接强度Key words
Dental caries/Polylactic acid/Root canal post/Bond strength分类
医药卫生引用本文复制引用
潘徽,程灿,胡嘉,刘鹤,孙志辉..聚乳酸可吸收根管桩与3种粘接剂的粘接强度[J].北京大学学报（医学版）,2015,47(6):990-993,4.
