几种热塑牙胶根管充填方法根尖封闭性能的实验  

An In Vitro Comparison Study on Sealing Ability of Four Thermoplasticized Guttapercha Obturation Techniques with Cold Lateral Condensation

作　　者：欧阳勇[1] 凌均棨[1] 高燕[1] 曾劲锋[1] 林格[1] 胡晓莉[1] 

机构地区：[1]中山大学光华口腔医学院.附属口腔医院牙体牙髓科,广东广州510055

出　　处：《中山大学学报（医学科学版）》2005年第5期552-554,共3页Journal of Sun Yat-Sen University:Medical Sciences

摘　　要：【目的】比较并分析侧压根管充填术和4种热塑牙胶根管充填术的根尖封闭性能。【方法】收集新鲜拔除的54颗牙,预备后随机分为5组。分别采用侧压根管充填术、热牙胶侧压根管充填术、Thermafil根管充填术、热牙胶垂直加压根管充填术和注射式热牙胶根管充填术,进行牙胶根管充填。使用染料渗入法检测根尖微渗漏的发生情况,染色后在立体显微镜下测量染料自根尖渗入的长度并分析其结果。【结果】根尖微渗漏渗入长度的中位数依次为冷侧压根管充填组1.55mm、热牙胶侧压根管充填术组为0.85mm、热牙胶垂直加压根管充填术组0.65mm、Thermafil根管充填组0.50mm、注射式热牙胶根管充填组0.40mm;两两比较发现冷、热牙胶根管充填术后的根尖微渗漏发生差异有显著性意义(P<0.05);各组热牙胶根管充填术后的根尖微渗漏发生情况差异没有显著性意义(P>0.05);只有注射式热牙胶根管充填组与Thermafil根管充填组之间的根尖微渗漏差异有显著性意义(P<0.05)。【结论】热塑牙胶根管充填术的根尖封闭能力优于冷牙胶侧压根管充填术;4种热塑压胶根管充填术之间,以注射式热牙胶根管充填术的根尖封闭能力较好。[Objective]To compare the apical sealing ability of root canal Idling using cold lateral condensation with one of the four methods of thermoplasticized gutta-percha. [Method]Fifty-four root canals of 54 freshly extracted human teeth with single canal were divided into five groups randomly after preparation. The root canals were obturated with cold lateral condensation, warm lateral condensation technique, Thermafil, warm vertical condensation technique and injectable thermoplasticized gutta-percha technique, respectively. The leaked condition was measured by dye infiltration test. Linear dye penetration was measured under stereomicroscope with calibrated eye piece. [Results] The leaked lengths（medium） of cold lateral condensation group, warm lateral condensation technique group, warm vertical condensation technique group, Thermafil group and injectable thermoplasticized gutta-percha technique group were 1.55, 0.85, 0.65, 0.50, and 0.40 mm, respectively. There was significant difference in leaked lengths between thermoplasticized gutta-percha technique group and cold lateral condensation group （P〈 0.05）. Among thermoplasticized gutta-percha technique groups, significant difference in leaked lengths was found only between warm vertical condensation technique group and thermafil group （P 〈 0.05）. [Conclusion] Thermoplasticized gutta-percha techniques showed better apical sealing ability compared with cold lateral condensation. Among the four thermoplasticized gutta-percha techniques, the injectable thermoplasticized guttapercha technique displays the best apical sealing ability.

关 键 词：根管充填术 热塑牙胶充填技术 根尖封闭 染料渗入法 

分 类 号：R78[医药卫生—口腔医学]