Oltra Enrique, Cox Timothy C, LaCourse Matthew R, Johnson James D, Paranjpe Avina
Department of Endodontics, University of Washington, Seattle, WA, USA.
Department of Pediatrics (Craniofacial Medicine), University of Washington, Seattle, WA, USA.; Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA, USA.; Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia.
Restor Dent Endod. 2017 Feb;42(1):19-26. doi: 10.5395/rde.2017.42.1.19. Epub 2016 Dec 8.
Recently, bioceramic sealers like EndoSequence BC Sealer (BC Sealer) have been introduced and are being used in endodontic practice. However, this sealer has limited research related to its retreatability. Hence, the aim of this study was to evaluate the retreatability of two sealers, BC Sealer as compared with AH Plus using micro-computed tomographic (micro-CT) analysis.
Fifty-six extracted human maxillary incisors were instrumented and randomly divided into 4 groups of 14 teeth: 1A, gutta-percha, AH Plus retreated with chloroform; 1B, gutta-percha, AH Plus retreated without chloroform; 2A, gutta-percha, EndoSequence BC Sealer retreated with chloroform; 2B, gutta-percha, EndoSequence BC Sealer retreated without chloroform. Micro-CT scans were taken before and after obturation and retreatment and analyzed for the volume of residual material. The specimens were longitudinally sectioned and digitized images were taken with the dental operating microscope. Data was analyzed using an ANOVA and a Tukey test. Fisher exact tests were performed to analyze the ability to regain patency.
There was significantly less residual root canal filling material in the AH Plus groups retreated with chloroform as compared to the others. The BC Sealer samples retreated with chloroform had better results than those retreated without chloroform. Furthermore, patency could be re-established in only 14% of teeth in the BC Sealer without chloroform group.
The results of this study demonstrate that the BC Sealer group had significantly more residual filling material than the AH Plus group regardless of whether or not both sealers were retreated with chloroform.
最近，生物陶瓷封闭剂如EndoSequence BC封闭剂（BC封闭剂）已被引入并应用于牙髓病治疗实践中。然而，关于这种封闭剂的可再处理性的研究有限。因此，本研究的目的是使用显微计算机断层扫描（micro-CT）分析评估两种封闭剂（BC封闭剂与AH Plus相比）的可再处理性。
56颗拔除的人上颌切牙进行根管预备，并随机分为4组，每组14颗牙：1A组，牙胶尖，用氯仿对AH Plus进行再处理；1B组，牙胶尖，不用氯仿对AH Plus进行再处理；2A组，牙胶尖，用氯仿对EndoSequence BC封闭剂进行再处理；2B组，牙胶尖，不用氯仿对EndoSequence BC封闭剂进行再处理。在根管充填和再治疗前后进行显微CT扫描，并分析残留材料的体积。将标本纵向切片，用牙科手术显微镜拍摄数字化图像。使用方差分析和Tukey检验对数据进行分析。进行Fisher精确检验以分析恢复通畅的能力。
与其他组相比，用氯仿再处理的AH Plus组残留的根管充填材料明显更少。用氯仿再处理的BC封闭剂样本比不用氯仿再处理的效果更好。此外，在不用氯仿的BC封闭剂组中，只有14%的牙齿能够重新建立通畅。
本研究结果表明，无论两种封闭剂是否用氯仿进行再处理，BC封闭剂组的残留充填材料都比AH Plus组明显更多。
Zotero 插件
