Mohite Pramod, Gupta Divya, Gupta Ruchika, Kamat Sharad, Shaw Amar Kumar
Department of Conservative Dentistry and Endodontics, Vasantdada Patil Dental College, Pune, Maharashtra, India.
Department of Conservative Dentistry and Endodontics, D. Y. Patil Dental School, Pune, Maharashtra, India.
J Conserv Dent Endod. 2024 Jan;27(1):36-41. doi: 10.4103/JCDE.JCDE_189_23. Epub 2024 Jan 13.
An endodontic treatment is considered a success after thorough chemomechanical debridement coupled with obturating root canals in a concrete way thereby providing hermetic seal. Gutta-percha being nonadherent necessitates use of a sealer to achieve hermetic seal. Adequate adhesion of root canal sealer with gutta-percha core and radicular dentin ensures lack of apical leakage.
Sixty extracted mandibular premolars with single root canal decoronated at cementoenamel junction were selected and randomly allocated to two groups ( = 30). Samples in Group 1 were prepared with BT Race file, while Group 2 samples were prepared with BT Race alongwith XP Endo file. Absorbent paper points were used for canal drying and samples were randomly divided into six subgroups. In Subgroup I, obturation was done with bio-ceramic (BC) sealer (Endosequence BC) and BC gutta-percha. In Subgroup II, resin-based (AH plus) sealer and gutta-percha were used. In Subgroup III, calcium hydroxide-based (Sealapex) sealer and gutta-percha were used. Sectioning of root samples was done perpendicularly into coronal, middle, and apical segments of 3 mm each. A universal testing machine was used for sample testing, in which push-out bond strength corresponded to the highest value obtained. Stereomicroscopic (×20) study of the samples determined the failure mode at dentin/sealer/main cone interface.
Analysis of variance and post hoc Tukey's tests were used for data analysis.
Endosequence BC with XP-Endo files showed the highest mean push-out bond strength (16.31 MPa), whereas Sealapex without XP-Endo file had the lowest values (12.76 MPa). Mixed failure of adhesive and cohesive mode was observed for most samples.
Adjunctive irrigation agitation technique utilizing XP-Endo Finisher facilitates biofilm eradication from difficult niches in root canals, thereby improving adhesion of sealer and subsequently the sealer bond strength.
在进行彻底的化学机械清创并以具体方式封闭根管从而实现气密密封后，根管治疗被认为是成功的。牙胶不具黏附性，因此需要使用封闭剂来实现气密密封。根管封闭剂与牙胶核心和根管牙本质的充分黏附可确保根尖无渗漏。
选取60颗在牙骨质牙釉质界处去冠的单根管下颌前磨牙，随机分为两组（每组n = 30）。第1组样本用BT Race锉制备，而第2组样本用BT Race锉和XP Endo锉联合制备。用吸水纸尖干燥根管，样本随机分为六个亚组。在亚组I中，用生物陶瓷（BC）封闭剂（Endosequence BC）和BC牙胶进行根管充填。在亚组II中，使用树脂基（AH plus）封闭剂和牙胶。在亚组III中，使用氢氧化钙基（Sealapex）封闭剂和牙胶。将牙根样本垂直切成每段3 mm的冠段、中段和根尖段。使用万能试验机对样本进行测试，其中推出粘结强度对应获得的最高值。用立体显微镜（×20）研究样本，确定牙本质/封闭剂/主尖界面的失败模式。
采用方差分析和事后Tukey检验进行数据分析。
Endosequence BC与XP-Endo锉联合使用时平均推出粘结强度最高（16.31 MPa），而未使用XP-Endo锉的Sealapex封闭剂的值最低（12.76 MPa）。大多数样本观察到黏附性和内聚性模式的混合失败。
利用XP-Endo Finisher的辅助冲洗搅拌技术有助于清除根管中难以到达部位的生物膜，从而提高封闭剂的黏附性以及随后的封闭剂粘结强度。
