Fracture resistance, gap and void formation in root-filled mandibular molars restored with bulk-fill resin composites and glass-ionomer cement base

Q1 Medicine Journal of Investigative and Clinical Dentistry Pub Date : 2019-06-19 DOI:10.1111/jicd.12435

Nathamon Thongbai-on, Kanet Chotvorrarak, Danuchit Banomyong, Michael F. Burrow, Sittichoke Osiri, Nattha Pattaravisitsate

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引用次数: 5

Abstract

Aim

To evaluate fracture resistance and gap/void presence of root-filled mandibular molars restored with 2 bulk-fill and 1 conventional resin composites, with or without a glass-ionomer cement (GIC) base.

Methods

Coronal access and mesio-occlusal (MO) cavities were prepared, then root canal treatment was performed on 30 mol/L. The teeth were randomly divided, according to the cavity volume, into 6 experimental groups (N = 5) and restored with conventional/light-cured (Ceram-X), bulk-fill/light-cured (SureFil SDR) or bulk-fill/dual-cured (Core-X Flow) with/without a 2-mm thick GIC base. Gaps and voids (%) were determined using microcomputed tomography. Intact teeth and unrestored teeth were used as negative and positive controls. Fracture load (N) was determined using a universal testing machine.

Results

No significant difference in fracture resistance or gap/void formation was found among the 3 resin composites. GIC-base groups revealed significantly lower fracture strength than intact teeth, while fracture strengths of no GIC-base groups were not significantly different from intact teeth. GIC-base groups revealed significantly more gaps and voids in the area of the GIC than the resin composite.

Conclusion

Conventional and bulk-fill resin composites provided similar fracture resistance and gaps/voids in root-filled molars with MO cavities. Placing a GIC base decreased fracture resistance and increased gap/void formation.

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大块填充树脂复合材料与玻璃离子水门铁基修复下颌磨牙的抗折性、间隙和空隙形成

目的评价两种大块填充材料和一种常规树脂复合材料在有或没有玻璃离子水门铁(GIC)基托的情况下下颌磨牙的抗骨折性和间隙/空隙存在情况。方法制备冠状通道和中牙合(MO)空腔，以30 mol/L的浓度进行根管治疗。根据牙体体积随机分为6个试验组(N = 5)，分别采用常规/光固化(cerami - x)、大块填充/光固化(SureFil SDR)或大块填充/双固化(Core-X Flow)修复，有/没有2mm厚的GIC基托。间隙和空隙(%)采用微计算机断层扫描测定。以完整牙和未修复牙作为阴性对照和阳性对照。断裂载荷(N)采用万能试验机测定。结果3种树脂复合材料在抗断裂性能和空隙形成方面无显著差异。gic基托组的断裂强度显著低于完整牙，无gic基托组的断裂强度与完整牙无显著差异。与树脂复合材料相比，GIC基组在GIC区域显示出更多的间隙和空隙。结论常规树脂复合材料与块状填充树脂复合材料在MO牙槽的牙根充填磨牙中具有相似的抗折性和空隙性。放置GIC底座降低了断裂阻力，增加了裂缝/空隙的形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Investigative and Clinical Dentistry DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.90

自引率

0.00%

发文量

期刊介绍： Journal of Investigative and Clinical Dentistry (JICD) aims to publish quality, peer reviewed original research and topical reviews on all aspects of investigative and clinical dentistry and craniofacial research, including molecular studies related to oral health and disease. Although international in outlook, the Editor especially encourages papers from the Asia Pacific. The journal also aims to provide clinicians, scientists and students of dentistry with a knowledge transfer platform for rapid publication of reports through an international journal, which will be available free online until 2012. Its scope, therefore, is broad, inclusive and international, but with a particular focus on Asia Pacific. The Editor welcomes manuscripts in the following key thematic areas in oral and maxillofacial sciences: Community Dentistry and Oral Epidemiology, Conservative Dentistry, Dental Biomaterials, Dental Pedagogy, Endodontics and Traumatology, Implant Dentistry, Oral Biosciences, Oral and Maxillofacial Surgery, Oral Medicine, Oral Pathology and Oral Microbiology, Orthodontics, Oral Radiology, Oral Rehabilitation, Paedodontics, Periodontology and Periodontal Medicine.

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