Mechanical properties of curved nickel-titanium orthodontic archwires prepared by cold bending and heat bending techniques
Conference proceedings article
ผู้เขียน/บรรณาธิการ
กลุ่มสาขาการวิจัยเชิงกลยุทธ์
ไม่พบข้อมูลที่เกี่ยวข้อง
รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Pongpat K., Dechkunakorn S., Anuwongnukroh N., Khantachawana A.
ผู้เผยแพร่: Trans Tech Publications
ปีที่เผยแพร่ (ค.ศ.): 2017
Volume number: 266 SSP
หน้าแรก: 3
หน้าสุดท้าย: 7
จำนวนหน้า: 5
ISBN: 9783035711585
นอก: 1012-0394
eISSN: 1662-9779
ภาษา: English-Great Britain (EN-GB)
บทคัดย่อ
Curved nickel-titanium (NiTi) orthodontic archwires are widely used in deep bite and open bite correction because of their extraordinary properties of shape memory and superelasticity. The aim of this study were to investigate the mechanical properties of curved NiTi archwires prepared by two different techniques; cold bending and direct electric resistance heat treatment (DERHT) bending and compare those properties to preformed curve NiTi archwires. Preformed curve archwires, 0.016x0.022 inch, were served as a control (group1). Plain archwires were curved into similar geometry as control by fingers (group2) and under the application of DERHT (group3). The three-point bending test was performed to analyze unloading force, springback and stiffness of archwires. Surface hardness was measured by Vickers micro-hardness test. The result showed that the unload force of all sample groups were similar. However, the stiffness and spring back properties of group2 and group3 were significantly higher than those of group 1(p<0.05). Moreover, surface hardness of cold forming technique and preform-curved NiTi archwire was slightly lower than those obtained from DERHT bending technique. Based on these results, the cold bending technique could provide the curved archwire with similar mechanical properties to the preformcurved NiTi archwire. Therefore, the cold bending technique was acceptable to be used as a chairside orthodontic NiTi wire bending. ฉ 2017 Trans Tech Publications, Switzerland.
คำสำคัญ
Cold bending technique, DERHT bending technique, Nickel-titanium archwire
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