Fracture resistance evaluation of CAD/CAM zirconia and composite primary molar crowns with different occlusal thicknesses.

IF 3.1 4区 医学 Q2 BIOPHYSICS Journal of Applied Biomaterials & Functional Materials Pub Date : 2024-01-01 DOI:10.1177/22808000241235994
Arif Bolaca, Yıldırım Erdoğan
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Abstract

Objective: To evaluate the effect of different CAD/CAM materials and occlusal thicknesses on the fracture resistance of primary molar crowns.

Methods: Sixty extracted primary molar teeth were prepared and randomly divided into six experimental groups according to the material and thickness. Primary molar crowns with a central groove thickness of 0.3 and 0.5 mm were fabricated from CAD/CAM zirconia (group Z), zirconia-reinforced lithium silicate (group ZLS), and pre-polymerized composite resin blocks (group C). Each crown was cemented with self-adhesive resin cement on the prepared tooth. All specimens were subjected to fracture tests until fracture. Fracture load values were recorded in Newtons (N). Data were statistically analyzed using a two-way analysis of variance (ANOVA) followed by Tukey multiple comparison test.

Results: The highest fracture load values were obtained in group Z at 0.5 mm occlusal thickness and were significantly higher compared with the other experimental groups (p < 0.05). Although the lowest fracture load values were obtained in group ZLS at 0.3 mm occlusal thickness, all the tested CAD/CAM primary molar crowns at both thicknesses demonstrated fracture load values exceeding reported chewing force in pediatric patients.

Conclusion: CAD/CAM primary molar crowns with reduced occlusal thickness may be used for the full-coverage restoration of primary molar teeth.

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不同咬合厚度的 CAD/CAM 氧化锆和复合材料基磨牙冠的抗断裂性评估。
目的:评估不同的 CAD/CAM 材料和咬合厚度对基牙牙冠抗折性的影响:评估不同的 CAD/CAM 材料和咬合厚度对基牙牙冠抗折性的影响:制备 60 颗拔出的基磨牙,并根据材料和厚度随机分为 6 个实验组。用 CAD/CAM 氧化锆(Z 组)、氧化锆增强硅酸锂(ZLS 组)和预聚合复合树脂块(C 组)制作中心槽厚度为 0.3 毫米和 0.5 毫米的基磨牙牙冠。每个牙冠都用自粘性树脂粘接剂粘接在制备好的牙齿上。所有试样均进行断裂测试,直至断裂。断裂荷载值以牛顿(N)为单位记录。使用双向方差分析(ANOVA)对数据进行统计分析,然后进行 Tukey 多重比较试验:结果:Z 组在咬合厚度为 0.5 毫米时获得的断裂载荷值最高,与其他实验组相比明显较高(p 结论:Z 组的断裂载荷值最高,与其他实验组相比明显较高(p):减少咬合厚度的 CAD/CAM 基磨牙冠可用于基磨牙的全覆盖修复。
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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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