采用往复式器械预备后联合连续超声冲洗法去除椭圆形根管牙齿中封闭剂的显微CT评估
Micro- CT evaluation of sealers removal by reciprocal instrumentation followed by continuous ultrasonic irrigation in teeth with oval root canals.
作者信息
Colombo Janaina-Araujo, Rocha Daniel-Guimarães-Pedro, Limoeiro Ana-Grasiela-da Silva, Nascimento Wayne-Martins, Fontana Carlos-Eduardo, Pelegrine Rina-Andrea, Bueno Carlos-Eduardo-da Silveira, De Martin Alexandre-Sigrist
机构信息
Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Endodontia, Capinas, SP, Brazil.
Pontifícia Universidade Católica de Campinas, Centro de Ciências da Vida, Programa de Pós-graduação em Ciências da Saúde, Campinas, SP, Brazil.
出版信息
J Clin Exp Dent. 2023 Mar 1;15(3):e233-e238. doi: 10.4317/jced.60013. eCollection 2023 Mar.
BACKGROUND
The ability of the Reciproc system (R40) followed by continuous ultrasonic irrigation (CUI) to remove filling material from oval root canals of mandibular premolars filled with gutta-percha and AH Plus or Bio-C Sealer was evaluated by microtomography (micro-CT).
MATERIAL AND METHODS
The straight and oval root canals of 42 mandibular premolars were prepared with the ProDesign R 35.05 reciprocal file and randomly divided into two groups according to the material used to fill the canals (n=21): Group AH - Master Cone and AH Plus; Group BC - Master Cone and Bio-C Sealer. After filling and provisional sealing, the teeth were stored at 100% relative humidity and a temperature of 37°C for 30 days. The filling material was then removed with an R40 file. The material was considered completely removed when the R40 file reached the working length (WL), and no remaining filling material was visible on the canal walls. CUI was then performed. The teeth were scanned by micro- CT before and after removal of the filling material. The remaining filling material was measured in mm in the last apical 5 mm. The data were analyzed with the nonparametric Friedman test and subsequently with the Dunn test. The Mann-Whitney U test was also performed. Statistical significance was accepted at the 5% level.
RESULTS
After instrumentation with the Reciproc R40, the volume of residual filling material was significantly greater in the BC group than in the AH group ( = 0.035). After CUI, there was no difference in the volume of residual material between the two groups ( = 0.705).
CONCLUSIONS
Bio-C sealer was more difficult to remove with the Reciproc file than AH Plus. CUI improved the removal of residual filling material regardless of sealer type. However, no technique was able to completely clear the canals of filling material. Bioceramic cement, CUI, micro-CT, reciproc, retreatment.
背景
通过显微断层扫描（显微CT）评估了使用Reciproc系统（R40）并随后进行连续超声冲洗（CUI）从用牙胶和AH Plus或Bio-C封闭剂充填的下颌前磨牙椭圆形根管中去除充填材料的能力。
材料与方法
使用ProDesign R 35.05倒锉预备42颗下颌前磨牙的直根管和椭圆形根管，并根据用于充填根管的材料随机分为两组（n = 21）：AH组——主尖锉和AH Plus；BC组——主尖锉和Bio-C封闭剂。充填并临时封闭后，将牙齿储存在相对湿度100%、温度37°C的环境中30天。然后用R40锉去除充填材料。当R40锉到达工作长度（WL）且根管壁上没有可见的剩余充填材料时，认为材料已被完全去除。随后进行CUI。在去除充填材料前后对牙齿进行显微CT扫描。在根尖最后5mm处测量剩余充填材料的毫米数。数据采用非参数Friedman检验进行分析，随后采用Dunn检验。还进行了Mann-Whitney U检验。以5%的水平接受统计学显著性。
结果
使用Reciproc R40进行器械操作后，BC组的残余充填材料体积显著大于AH组（P = 0.035）。CUI后，两组之间的残余材料体积没有差异（P = 0.705）。
结论
与AH Plus相比，使用Reciproc锉去除Bio-C封闭剂更困难。无论封闭剂类型如何，CUI均改善了残余充填材料的去除。然而，没有一种技术能够完全清除根管内的充填材料。生物陶瓷水门汀、CUI、显微CT、倒锉、再治疗。
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