快速成型钴铬合金和钛合金牙扣的变形和保持力变化

IF 1.7 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Kawkb M. El-Tamimi , Dalia A. Bayoumi , Rafif Alshenaiber , Ibrahim Aljulayfi , Mohamed M.Z. Ahmed , Mohammed E. El-Sayed
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引用次数: 0

摘要

这项体外研究旨在评估用于临床的钴铬 Co-Cr 和钛 Ti 合金卡环的增材制造 (AM)。在对第一磨牙的镍铬合金模具进行扫描后,使用计算机辅助设计/计算机辅助制造(CAD/CAM)设计了Akers卡环。利用 AM 机床用 Co-Cr-W 牙科合金和 Ti-6Al-4V 合金粉末制造了卡环。然后将它们分为两组。使用万能试验机测量牙扣的初始保持力。在湿润条件下,使用专门设计的插入-移除试验装置对牙扣进行循环加载,循环次数达 5000 次。分别在 1000、2000、3000、4000 和 5000 次循环时测量保持力。此外,还使用扫描仪扫描了每个卡扣的凹痕表面,并对循环前和循环后的卡扣文件进行了叠加,以评估循环加载后的变形情况。用扫描电子显微镜(SEM)检查了固定扣尖的配合表面。最后发现,Co-Cr 组的初始保持力为 10.81 ± 0.37 N,Ti 组为 5.41 ± 0.18 N。与钛扣相比,钴铬合金扣的这种影响更为明显。Co-Cr和Ti合金的固定臂在循环前和循环后的距离分别为-0.290 ± 0.11 mm和-0.004 ± 0.01 mm,Co-Cr和Ti合金的往复臂在循环前和循环后的距离分别为-0.072 ± 0.04 mm和-0.032 ± 0.04 mm。移除钛扣所需的保持力明显低于移除钴铬合金扣所需的保持力。从最初使用到模拟临床使用的 3.5 年期间,Co-Cr 和 Ti 扣环的固位力都有显著下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Deformation and retentive forces variations of the additively manufactured cobalt-chromium and titanium alloys dental clasps

This in vitro study aimed to evaluate the additive manufacturing (AM) of cobalt chromium Co-Cr and titanium Ti alloy clasps for clinical use. After scanning the Ni-Cr die of the first molar, Akers' clasps were designed using computer-aided design/ computer-aided manufacturing (CAD/CAM). The clasps were manufactured from Co-Cr-W dental alloy and Ti-6Al-4V alloy powder using AM machines. Then, they were divided into two groups. The initial retentive force of the clasps was measured using a universal testing machine. Cyclic loading of the clasps was carried out by a specially designed insertion-removal testing apparatus in wet condition up to 5000 cycles. Retentive force was measured at 1000, 2000, 3000, 4000, and 5000 cycles. Moreover, the intaglio surface of each clasp was scanned using the scanner; and superimposition between the pre- and post-cycling clasp files was performed to evaluate deformation after cyclic loading. The fitting surfaces of retentive clasp tips were examined with a scanning electron microscope (SEM). Finally, it has been found that the initial retentive force for the Co-Cr group was 10.81 ± 0.37 N, and for the Ti group was 5.41 ± 0.18 N. Additionally, during the testing periods, both Co-Cr and Ti clasps continued to lose retentive force within the cycles of placement and removal. This effect was more prominent in the Co-Cr than in the Ti clasps. The distances between pre- and post-cycling in the retentive arm were −0.290 ± 0.11 mm and −0.004 ± 0.01 mm in Co-Cr and Ti alloys, respectively, and in the reciprocal arm were −0.072 ± 0.04 mm and −0.032 ± 0.04 mm in Co-Cr and Ti alloys, respectively. The retentive force required to remove the Ti clasps was found to be significantly lower than those required to dislodge the Co-Cr clasps. Co-Cr and Ti clasps lost significant amounts of retentive force from the initial use to the 3.5-year periods of simulated clinical use.

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来源期刊
Saudi Dental Journal
Saudi Dental Journal DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
3.60
自引率
0.00%
发文量
86
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.
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