有无纤维增强复合基材的树脂内冠抗断裂性能的初步研究。

IF 3.1 4区 医学 Q2 BIOPHYSICS
Işıl Kaya Büyükbayram, Mehmet Esad Güven, Deniz Ayman, Işıl Damla Şener Yamaner, Engin Fırat Cakan
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引用次数: 0

摘要

目的:研究两种不同的树脂纳米陶瓷计算机辅助设计和计算机辅助制造(CAD/CAM)修复材料对根管治疗的上颌前磨牙的断裂抗力和断裂形态的影响。方法:对40颗拔牙正常的上颌前磨牙进行根管治疗,牙合在牙髓-牙釉质连接处(CEJ)上方降低2mm。在CEJ边缘为每颗牙准备近端间盒,随机分为4组(n = 10): A组,牙髓室无树脂堆积;B组,2 mm纤维增强复合材料(FRC)构筑(EverX Posterior, GC);C组,浆腔内无树脂堆积;D组,2毫米的FRC堆积。A组和B组用树脂纳米陶瓷(RNC)组成的陶瓷纳米填料(Lava Ultimate 3 M ESPE)制备,C组和D组用RNC组成的陶瓷纳米杂化填料(Cerasmart GC Corp)制备。所有样品在具有热循环(CSTC)的咀嚼模拟器上进行120万次咀嚼循环(1.6 Hz, 50 N)和5000次热循环(5°C-55°C)的人工老化。在CSTC测试中幸存而未损坏的样品进行了载荷-断裂测试。结果:D组平均断裂强度最高(936.0±354.7),A组最低(684.2±466.9)。FRC作为基础材料组的断裂强度高于普通修复组。而添加和不添加FRC的Lava组和Cerasmart组之间差异无统计学意义(p > 0.05)。大多数样品在CEJ作用下发生了不可修复的断裂。结论:短纤维纤维作为树脂基材料,其抗断裂性能没有明显提高。Cerasmart和Lava块体具有相似的抗裂性和裂缝模式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fracture resistance of resin endocrowns with and without fiber reinforced composite base material: A preliminary study.

Objective: The aim of this study was to investigate the effects of fiber-reinforced composite base material on fracture resistance and fracture pattern of endodontically treated maxillary premolars restored with endocrowns using two different resin nanoceramic computer-aided design and computer-aided manufacturing (CAD/CAM) restorative material.

Methods: Forty extracted sound maxillary premolars with an occlusal reduction of 2 mm above the cementoenamel junction (CEJ) was performed following root canal treatment. Mesial interproximal box was prepared for each tooth at the margin of the CEJ and randomly distributed into four groups (n = 10) as follows: Group A, no resin build-up in the pulp chamber; Group B, 2 mm of fiber-reinforced composite (FRC) build-up (EverX Posterior, GC).; Group C, no resin build-up in pulp chamber; Group D, 2 mm of FRC build-up. Groups A and B were prepared with resin nanoceramic (RNC) consisting ceramic nanofillers (Lava Ultimate 3 M ESPE), while Group C and D were prepared with RNC consisting ceramic nanohybrid fillers (Cerasmart GC Corp). All samples were subjected to 1,200,000 chewing cycles (1.6 Hz, 50 N) and 5000 thermal cycles (5°C-55°C) for artificial aging on a chewing simulator with thermal cycles (CSTC). Samples that survived the CSTC test without being damaged were subjected to a load-to-fracture test.

Results: The highest mean fracture strength was found in Group D (936.0 ± 354.7) and lowest in Group A (684.2 ± 466.9). Fracture strength was higher in groups where FRC was used as a base material than plain restorations. However, there were no significant differences between the Lava and Cerasmart groups with and without FRC (p > 0.05). Most of the samples were irreparably fractured under CEJ.

Conclusion: Using short FRCs as a resin base material did not significantly improve fracture resistance. Cerasmart and Lava blocks had similar fracture resistance and fracture pattern.

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来源期刊
Journal of Applied Biomaterials & Functional Materials
Journal of Applied Biomaterials & Functional Materials BIOPHYSICS-ENGINEERING, BIOMEDICAL
CiteScore
4.40
自引率
4.00%
发文量
36
审稿时长
>12 weeks
期刊介绍: The Journal of Applied Biomaterials & Functional Materials (JABFM) is an open access, peer-reviewed, international journal considering the publication of original contributions, reviews and editorials dealing with clinical and laboratory investigations in the fast growing field of biomaterial sciences and functional materials. The areas covered by the journal will include: • Biomaterials / Materials for biomedical applications • Functional materials • Hybrid and composite materials • Soft materials • Hydrogels • Nanomaterials • Gene delivery • Nonodevices • Metamaterials • Active coatings • Surface functionalization • Tissue engineering • Cell delivery/cell encapsulation systems • 3D printing materials • Material characterization • Biomechanics
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