Fitness accuracy and retentive forces of additive manufactured titanium clasp
Fitness accuracy and retentive forces of additive manufactured titanium clasp
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DOI：
10.1016/j.jpor.2020.01.001
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发表时间：
2020-10-01
影响因子：
3.6
通讯作者：
Ohkubo, Chikahiro
中科院分区：
文献类型：
--
作者：
Takahashi, Kazuya;Torii, Mana;Ohkubo, Chikahiro
目的：对铸造钛义齿的实验室和临床评价进行了报道，但对添加制造(AM)支架的研究知之甚少。本研究旨在评价体外AM钛合金卡环的临床应用价值。方法：在扫描不锈钢模具模拟第一磨牙后，利用CAD软件设计Akers卡环。用激光烧结机和调幅试验机分别制备了CP钛(CPTi)、Ti-6Al-4V(Ti64)和Ti-6Al-7Nb(Ti67)粉末的AM卡环试件。作为对照，铸钛卡环由相同的三种钛合金制成。结果：虽然AM卡环的孔洞较少，污染较小，但AM卡环的卡环和卡尖的卡环精度略低于铸造卡环。所有钛卡环的初始固位力均在可接受的范围内，AM卡环的固位力下降幅度较小，可达到10,000次插入/拔出循环。结论：AM钛卡环与铸造钛卡环具有相似的临床应用价值。(C)2020年日本口腔修复学会。爱思唯尔有限公司出版。保留所有权利。
Purpose: Laboratory and clinical assessment of cast titanium dentures were reported, little is known about additive manufacturing (AM) frameworks. This study evaluated in vitro AM titanium alloy clasps for clinical use.Methods: After scanning the stainless steel dies to simulate the first molar, an Akers clasp was designed by CAD. AM clasp specimens were manufactured using laser sintering and AM machines from CP titanium grade 2 (CPTi), Ti-6Al-4V (Ti64), and Ti-6Al-7Nb (Ti67) powders. As controls, cast titanium clasps were conventionally made with same three titanium alloys. After nondestructive inspection and surface element analysis, surface roughness, fitness accuracy, initial retentive forces, and changes in retentive forces were measured.Results: Although few porosities and little contamination of AM clasps were confirmed, the AM clasp arm and tip indicated slightly worse fitness accuracy as compared to cast clasps. The initial retentive forces of all titanium clasps showed appropriate retentive forces within the acceptable ranges, AM clasps tended to have lower decreases in retentive forces with up to 10,000 insertion/removal cycles as compared to those of the cast clasps.Conclusions: AM titanium clasps would be acceptable for clinical use similar to that of cast titanium clasps. (C) 2020 Japan Prosthodontic Society. Published by Elsevier Ltd. All rights reserved.