Joining characteristics of titanium-based orthodontic wires connected by laser and electrical welding methods
Joining characteristics of titanium-based orthodontic wires connected by laser and electrical welding methods
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DOI：
10.1007/s10856-015-5391-9
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发表时间：
2015-01-01
影响因子：
3.7
通讯作者：
Yoshida, Noriaki
中科院分区：
文献类型：
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作者：
Matsunaga, Junko;Watanabe, Ikuya;Yoshida, Noriaki
本研究探讨了电焊和激光焊接钛基合金(贝塔钛和镍钛)焊丝与不锈钢或钴铬合金焊丝制造组合拱丝的可能性。采用4种正畸矩形直丝(0.017×0.025英寸)：不锈钢(S-S)、钴铬(Co-Cr)、β钛合金(β-Ti)和镍钛(Ni-Ti)。采用电焊和激光焊接方法分别制备了长15 mm的均匀和非均匀端接接头。非焊接钢丝(30 mm长)也作为对照。通过拉伸试验测量最大断裂载荷(N)和伸长率(%)。统计分析采用方差分析/Tukey检验(P<；0.05)。S-S/S-S和钴-铬/钴-铬试件的最大断裂载荷(ML)和延伸率(EL)显著高于电焊件和S-S/S-S和钴-铬/钴-铬激光焊试件。另一方面，激光焊接的Ni-Ti/Ni-Ti和β-Ti/β-Ti的ML和EL均高于电焊的相应试件。在异种焊接组合中，Ni-Ti/S-S、β-Ti/S-S和β-Ti/Co-Cr电焊试件的ML和EL显著高于相应的激光焊试件(P<；0.05)。异种焊接组合的最大断裂载荷和延伸率均高于激光焊接。
This study investigated the possibility of electrical and laser welding to connect titanium-based alloy (beta-titanium and nickel-titanium) wires and stainless-steel or cobalt-chromium alloy wires for fabrication of combination arch-wires. Four kinds of straight orthodontic rectangular wires (0.017 x 0.025 inch) were used: stainless-steel (S-S), cobalt-chromium (Co-Cr), beta-titanium alloy (beta-Ti), and nickel-titanium (Ni-Ti). Homogeneous and heterogeneous end-to-end joints (15 mm long each) were made by electrical welding and laser welding. Non-welded wires (30 mm long) were also used as a control. Maximum loads at fracture (N) and elongation (%) were measured by conducting tensile test. The data (n = 10) were statistically analyzed using analysis of variance/Tukey test (P < 0.05). The S-S/S-S and Co-Cr/Co-Cr specimens showed significantly higher values of the maximum load (ML) at fracture and elongation (EL) than those of the Ni-Ti/Ni-Ti and beta-Ti/beta-Ti specimens for electrical welding and those of the S-S/S-S and Co-Cr/Co-Cr specimens welded by laser. On the other hand, the laser-welded Ni-Ti/Ni-Ti and beta-Ti/beta-Ti specimens exhibited higher values of the ML and EL compared to those of the corresponding specimens welded by electrical method. In the heterogeneously welded combinations, the electrically welded Ni-Ti/S-S, beta-Ti/S-S and beta-Ti/Co-Cr specimens showed significantly (P < 0.05) higher ML and EL than those of the corresponding specimens welded by laser. Electrical welding exhibited the higher values of maximum load at fracture and elongation for heterogeneously welded combinations than laser-welding.