Lucas Camila de Paula Telles Pires, Viapiana Raqueli, Bosso-Martelo Roberta, Guerreiro-Tanomaru Juliane Maria, Camilleri Josette, Tanomaru-Filho Mário
Department of Restorative Dentistry, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil.
Department of Restorative Dentistry, Faculty of Dental Surgery, University of Malta, MaltaBrasil.
Braz Dent J. 2017 Jan-Feb;28(1):51-56. doi: 10.1590/0103-6440201701135.
The aim of this study was to evaluate the physicochemical properties and the apical dentin bond strength of the tricalcium silicate-based Biodentine in comparison to white MTA and zinc oxide eugenol-based cement (ZOE). Setting time and radiopacity were evaluated according to ISO 6876:2012 specification. Final setting time, compressive strength and pH were also assessed. Material's bond strength to the apical root canal dentin was measured by the push-out assay. Data were analyzed by ANOVA and Tukey-Krammer post-hoc test. Biodentine presented the shortest initial (16.2±1.48 min) and final setting time (35.4±5.55 min). Radiopacity of Biodentine (2.79±0.27 mmAl) does not agree with ISO 6876:2012 specifications. On the other hand, Biodentine showed higher compressive strength after 21 days (37.22±5.27 MPa) and higher dentin bond strength (11.2±2.16 MPa) in comparison to white MTA (27.68±3.56 MPa for compressive strength and 2.98±0.64 MPa for bond strength) (p<0.05). Both MTA and Biodentine produced an alkaline environment (approximately pH 10) (p>0.05) compared to ZOE (pH 7). It may be concluded that Biodentine exhibited faster setting, higher long-term compressive strength and bond strength to the apical dentin than MTA and ZOE.
本研究的目的是评估硅酸三钙基生物陶瓷（Biodentine）与白色矿物三氧化物聚合体（MTA）和氧化锌丁香酚基水门汀（ZOE）相比的物理化学性质和根尖牙本质粘结强度。根据ISO 6876:2012规范评估凝固时间和射线不透性。还评估了最终凝固时间、抗压强度和pH值。通过推出试验测量材料与根尖根管牙本质的粘结强度。数据采用方差分析和Tukey-Krammer事后检验进行分析。生物陶瓷（Biodentine）的初始凝固时间最短（16.2±1.48分钟），最终凝固时间也最短（35.4±5.55分钟）。生物陶瓷（Biodentine）的射线不透性（2.79±0.27 mmAl）不符合ISO 6876:2012规范。另一方面，与白色MTA相比，生物陶瓷（Biodentine）在21天后显示出更高的抗压强度（37.22±5.27 MPa）和更高的牙本质粘结强度（11.2±2.16 MPa）（白色MTA的抗压强度为27.68±3.56 MPa，粘结强度为2.98±0.64 MPa）（p<0.05）。与ZOE（pH值7）相比，MTA和生物陶瓷（Biodentine）均产生碱性环境（约pH值10）（p>0.05）。可以得出结论，与MTA和ZOE相比，生物陶瓷（Biodentine）凝固更快，对根尖牙本质的长期抗压强度和粘结强度更高。
