Effect of Cervical Margin Relocation With Different Injectable Restorative Materials on Fracture Resistance of Molars Received MOD CAD/CAM Onlay Restorations

IF 3.2 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Esthetic and Restorative Dentistry Pub Date : 2025-01-18 DOI:10.1111/jerd.13414

Basema N. Roshdy, Radwa I. Eltoukhy, Ashraf I. Ali, Salah Hasab Mahmoud

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引用次数: 0

Abstract

Objective

To investigate the effect of cervical margin relocation with four different injectable restorative materials on the fracture resistance of molars receiving mesio–occluso–distal CAD/CAM nanoceramic onlay restorations.

Materials and Methods

One hundred and five sound mandibular molars received a standardized mesio–occluso–distal onlay preparation, with cervical margins located 2 mm apical to the cemento-enamel junction. The molars were randomly allocated into five groups (n = 21) according to the cervical relocating materials used: Group I had no cervical margin relocation; Group II used a highly viscous glass ionomer; Group III used a highly-filled injectable resin composite; Group IV used a resin-modified glass ionomer; and Group V used a bioactive ionic resin. All groups received immediate dentin sealing before nanoceramic resin-based CAD/CAM onlay restorations. After the specimens were subjected to thermo-mechanical loading, they underwent fracture resistance testing and failure mode analysis.

Results

No statistically significant difference in fracture resistance was observed among the tested groups. Regarding the mode of failure, irreparable failure was significantly dominant, with no significant difference among the groups.

Conclusion

Employing injectable restorative materials for cervical margin relocation had no detrimental effect on the fracture resistance of molars receiving nanoceramic resin-based CAD/CAM onlay restorations.

Clinical Significance

CAD/CAM onlay restorations preceded by cervical margin relocation using injectable restorative materials could tolerate compressive loading comparably to those without cervical margin relocation.

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不同注射修复材料颈椎缘移位对MOD CAD/CAM嵌体修复磨牙抗骨折性的影响。

目的：探讨四种不同的注射修复材料对中牙合远端CAD/CAM纳米陶瓷嵌体修复磨牙抗骨折性的影响。材料和方法：105颗健康的下颌磨牙接受了标准化的中系牙合远端嵌体制备，颈缘位于距牙骨质-牙釉质交界处2 mm的顶端。根据所使用的颈椎移位材料，将磨牙随机分为5组（n = 21）： 1组不进行颈缘移位；第二组采用高粘性玻璃离聚体；第三组采用高度填充的可注射树脂复合材料；第四组采用树脂改性玻璃离聚体；V组使用生物活性离子树脂。所有组均在纳米陶瓷树脂基CAD/CAM嵌体修复前立即进行牙本质修复。试件经过热-机械加载后，进行了抗断裂试验和破坏模式分析。结果：各组间抗骨折能力差异无统计学意义。在失败模式上，不可挽回的失败明显占主导地位，各组间无显著差异。结论：采用注射修复材料进行颈缘移位对纳米陶瓷树脂基CAD/CAM嵌体修复磨牙的抗骨折性无不利影响。临床意义：使用注射修复材料进行颈缘移位的CAD/CAM嵌体修复比不进行颈缘移位的患者更能承受压缩载荷。

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 Esthetic and Restorative Dentistry 医学-牙科与口腔外科

CiteScore

6.30

自引率

6.20%

发文量

124

审稿时长

>12 weeks

期刊介绍： The Journal of Esthetic and Restorative Dentistry (JERD) is the longest standing peer-reviewed journal devoted solely to advancing the knowledge and practice of esthetic dentistry. Its goal is to provide the very latest evidence-based information in the realm of contemporary interdisciplinary esthetic dentistry through high quality clinical papers, sound research reports and educational features. The range of topics covered in the journal includes: - Interdisciplinary esthetic concepts - Implants - Conservative adhesive restorations - Tooth Whitening - Prosthodontic materials and techniques - Dental materials - Orthodontic, periodontal and endodontic esthetics - Esthetics related research - Innovations in esthetics