Bankoğlu Güngör Merve, Turhan Bal Bilge, Yilmaz Handan, Aydin Cemal, Karakoca Nemli Seçil
Department of Prosthodontics, Faculty of Dentistry, Gazi University.
Dent Mater J. 2017 Mar 31;36(2):135-141. doi: 10.4012/dmj.2016-017. Epub 2017 Jan 20.
The purpose of the present study was to evaluate and compare the fracture strength and failure modes of endocrowns, zirconia post, and fiber post supported restorations and predict the clinical outcomes of six different prostheses used for endodontically treated teeth. Sixty (n=10) maxillary central incisors were restored with zirconia post/resin-nano-ceramic crown (ZrRNC), fiber post/resinnano-ceramic crown (FbRNC), zirconia post/lithium disilicate ceramic crown (ZrLDS), fiber post/lithium disilicate ceramic crown (FbLDS), resin-nano-ceramic endocrown (EndoRNC), and lithium disilicate ceramic endocrown (EndoLDS). Fracture strength test was performed. Fracture loads and modes were determined. The EndoLDS group had the highest fracture strength, followed by ZrRNC and EndoRNC group. However the results were not significantly different among groups (p>0.05). The failure modes of the restorations changed according to the restorative materials. Endodontically treated anterior teeth might be restored with endocrowns as well as other post-core restorations, however tooth fracture failures should be considered that affect reliability of endocrowns.
本研究的目的是评估和比较全冠内冠、氧化锆桩和纤维桩支持的修复体的断裂强度和失效模式，并预测用于根管治疗牙齿的六种不同修复体的临床结果。60颗（n = 10）上颌中切牙分别用氧化锆桩/树脂纳米陶瓷冠（ZrRNC）、纤维桩/树脂纳米陶瓷冠（FbRNC）、氧化锆桩/二硅酸锂陶瓷冠（ZrLDS）、纤维桩/二硅酸锂陶瓷冠（FbLDS）、树脂纳米陶瓷全冠内冠（EndoRNC）和二硅酸锂陶瓷全冠内冠（EndoLDS）进行修复。进行了断裂强度测试。测定了断裂载荷和模式。EndoLDS组的断裂强度最高，其次是ZrRNC组和EndoRNC组。然而，各组之间的结果没有显著差异（p>0.05）。修复体的失效模式根据修复材料而变化。根管治疗后的前牙可以用全冠内冠以及其他桩核修复体进行修复，但是应该考虑牙齿骨折失败会影响全冠内冠的可靠性。
