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首页> 外文期刊>Journal of dentistry >Direct restoration of severely damaged incisors using short fiber-reinforced composite resin.
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Direct restoration of severely damaged incisors using short fiber-reinforced composite resin.

机译：使用短纤维增强复合树脂可直接修复严重受损的门牙。

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OBJECTIVES: The aim of this in vitro study was to evaluate the static load-bearing capacity and the failure mode of endodontically treated maxillary incisors restored with complete crowns made of experimental composite resin (FC) with short fiber fillers, with and without root canal posts. Further aim was to evaluate the effect of fiber-reinforced composite resin (FRC) on the failure mode of the restoration. MATERIAL AND METHODS: The experimental composite resin (FC) was prepared by mixing 22.5wt.% of short E-glass fibers (3mm in length) and 22.5wt.% of semi-interpenetrating polymer network (IPN) resin with 55wt.% of silane treated silica fillers. The clinical crowns of 30 human extracted maxillary incisors were sectioned at the cemento-enamel junction. Five groups of direct complete crowns were fabricated (n=6); Group A: made from particulate filler composite resin (PFC) (Grandio Caps, VOCO, control), Group B: PFC with fiber post (everStick, StickTeck), Group C: made from PFC with everStick fiber postand FRC-substructure, Group D: made from FC, Group E: made from FC with FRC-substructure. The root canals were prepared and posts were cemented with resin cement (ParaCem Universal). All restored teeth were stored in water at room temperature for 24h before they were statically loaded with speed of 1.0mm/min until fracture. Data were analyzed using ANOVA (p=0.05). Failure modes were visually examined. RESULTS: ANOVA revealed that restorations made from experimental fiber composite resin had higher load-bearing capacity (349N) (p<0.05) than the control restorations (173N). No significant difference was found in load-bearing capacity between restorations reinforced with FRC-substructure and those without (p>0.05). CONCLUSIONS: Restorations made from short glass fiber containing composite resin with IPN-polymer matrix showed better load-bearing capacity than those made with either plain PFC or PFC reinforced with fiber post.
机译：目的：这项体外研究的目的是评估采用牙合治疗的上颌切牙的静态承重能力和失败模式，该修复牙由短复合纤维填充的实验复合树脂（FC）制成的完整冠修复，带或不带根管桩。进一步的目的是评估纤维增强复合树脂（FRC）对修复体破坏模式的影响。材料与方法：通过将22.5wt。％的短E-玻璃纤维（长3mm）和22.5wt。％的半互穿聚合物网络（IPN）树脂与55wt。％的H2O2混合来制备实验复合树脂（FC）。硅烷处理的二氧化硅填料。在牙骨质-牙釉质交界处切下30根人类上颌切牙的临床冠。制作了五组直接完整的表冠（n = 6）; A组：由颗粒填料复合树脂（PFC）（Grandio Caps，VOCO，对照）制成，B组：带纤维桩的PFC（everStick，StickTeck），C组：由具有everStick纤维桩和FRC子结构的PFC制造，D组：由FC制成，E组：由具有FRC子结构的FC制成。准备根管，并用树脂水泥（ParaCem Universal）粘接桩。将所有修复的牙齿在室温下于水中存放24h，然后以1.0mm / min的速度静态加载直到骨折。使用ANOVA分析数据（p ＝ 0.05）。目视检查失效模式。结果：方差分析表明，由实验纤维复合树脂制成的修复体比对照修复体（173N）具有更高的承载力（349N）（p <0.05）。用FRC子结构加固的修复体与不使用FRC子结构加固的修复体之间的承载力没有显着差异（p> 0.05）。结论：由含IPN聚合物基体的含复合树脂的短玻璃纤维制成的修复体比普通PFC或纤维桩增强PFC的修复体具有更好的承载能力。

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