Banphakarn Nonthicha, Yanpiset Kallaya, Banomyong Danuchit
Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
J Investig Clin Dent. 2019 Nov;10(4):e12444. doi: 10.1111/jicd.12444. Epub 2019 Jul 27.
To compare the shear bond strengths of a calcium silicate-based root canal sealer (CSS), to dentin or calcium silicate-impregnated gutta-percha (CSGP), with the shear bond strengths of an epoxy resin-based sealer.
For sealer/dentin testing, 40 hemisectioned roots were divided into 2 groups. Coronal root dentin discs were bonded with CSS or epoxy resin-based sealer. For sealer/core material testing, CSGP and conventional gutta-percha discs were bonded with a matching sealer (N = 20 per group). The shear bond strengths were tested using a universal testing machine. The failed modes were analyzed using stereomicroscopy and scanning electron microscopy.
The CSS sealer had significantly higher shear bond strength to dentin than did epoxy resin-based sealer (P < .01). However, shear bond strengths of the 2 sealers to core materials did not significantly differ (P = .74). The remnants of the CSS sealer adhering to dentin or calcium silicate gutta-percha disc were observed.
The CSS sealer had better adhesion to dentin than did epoxy resin-based sealer. However, the bond of the CSS sealer to impregnated gutta-percha was not superior to the epoxy resin-based sealer bonded to conventional gutta-percha.
比较硅酸钙基根管封闭剂（CSS）与牙本质或硅酸钙浸渍牙胶（CSGP）之间的剪切粘结强度，以及与环氧树脂基封闭剂的剪切粘结强度。
对于封闭剂/牙本质测试，将40个半切牙根分为2组。用CSS或环氧树脂基封闭剂粘结冠部牙根牙本质片。对于封闭剂/核心材料测试，将CSGP和传统牙胶片与匹配的封闭剂粘结（每组N = 20）。使用万能试验机测试剪切粘结强度。使用体视显微镜和扫描电子显微镜分析失败模式。
CSS封闭剂与牙本质的剪切粘结强度显著高于环氧树脂基封闭剂（P <.01）。然而，两种封闭剂与核心材料的剪切粘结强度没有显著差异（P =.74）。观察到CSS封闭剂残留在牙本质或硅酸钙牙胶片上。
CSS封闭剂对牙本质的粘附性优于环氧树脂基封闭剂。然而，CSS封闭剂与浸渍牙胶的粘结性并不优于环氧树脂基封闭剂与传统牙胶的粘结性。
