Fracture resistance of CAD/CAM tooth-colored versus cast metal post-and-core restorations in root filled teeth: An in vitro study

IF 1.7 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Saudi Dental Journal Pub Date : 2024-07-02 DOI:10.1016/j.sdentj.2024.07.002

Buthaina Jrab , Abdul Rahman Saleh , Anas Al-Jadaa , Carlos A. Jurado , Musab H. Saeed , Kelvin I. Afrashtehfar

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Abstract

Purpose

This study investigated the fracture resistance and failure modes of custom-fabricated post- and core dental restorations using various CAD/CAM materials.

Materials and Methods

Seventy-five mandibular second premolars were allocated to five groups (n = 15) and prepared for standardized post and core restorations. The groups included a control group comprising cast metal and four CAD/CAM materials: Vita Enamic, Shofu HC, Trilor, and PEKK. Fracture resistance was assessed using a compressive force at a crosshead speed of 1 mm/min until failure occurred. Data were analyzed using one-way analysis of variance (ANOVA) and chi-square tests.

Results

The metal group had the highest fracture resistance (244.41 ± 75.20 N), with a significant variance compared to that in the CAD/CAM groups (p < 0.001). No significant differences were observed among the non-metallic groups.

Conclusions

While several CAD/CAM materials displayed satisfactory flexural properties, cast metal posts showed superior fracture resistance in endodontically treated teeth but were mostly associated with catastrophic failure. The clinical application of CAD/CAM materials for post-core restorations presents a viable alternative to traditional metal posts, potentially reducing the risk of unfavorable fractures.

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牙根充填牙的 CAD/CAM 牙色与铸造金属桩核修复体的抗断裂性：体外研究

材料与方法 75 颗下颌第二前磨牙被分配到 5 个组（n = 15），并准备进行标准化的桩核修复。各组包括由铸造金属和四种 CAD/CAM 材料组成的对照组：Vita Enamic、Shofu HC、Trilor 和 PEKK。抗折断性的评估是以 1 毫米/分钟的十字头速度施加压缩力，直至发生破坏。结果金属组的抗折力最高（244.41 ± 75.20 N），与 CAD/CAM 组相比差异显著（p < 0.001）。结论虽然几种 CAD/CAM 材料显示出令人满意的抗弯性能，但铸造金属支架在牙髓治疗的牙齿中显示出更高的抗折性，但大多与灾难性失败有关。将 CAD/CAM 材料用于牙髓后修复的临床应用为传统金属支架提供了一个可行的替代方案，有可能降低不利骨折的风险。

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来源期刊

Saudi Dental Journal DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

22 weeks

期刊介绍： Saudi Dental Journal is an English language, peer-reviewed scholarly publication in the area of dentistry. Saudi Dental Journal publishes original research and reviews on, but not limited to: • dental disease • clinical trials • dental equipment • new and experimental techniques • epidemiology and oral health • restorative dentistry • periodontology • endodontology • prosthodontics • paediatric dentistry • orthodontics and dental education Saudi Dental Journal is the official publication of the Saudi Dental Society and is published by King Saud University in collaboration with Elsevier and is edited by an international group of eminent researchers.