TORSIONAL AND STIFFNESS PROPERTIES OF NICKEL-TITANIUM K-FILES

被引：30

作者：

CAMPS, JJ ^{[1
]}

PERTOT, WJ ^{[1
]}

机构：

[1] FAC DENT MARSEILLE,DEPT RESTORAT DENT & ENDODONT,F-13385 MARSEILLE 5,FRANCE

来源：

INTERNATIONAL ENDODONTIC JOURNAL | 1995年 / 28卷 / 05期

关键词：

ENDODONTIC FILE; NICKEL; STIFFNESS; TITANIUM; TWIST;

D O I：

10.1111/j.1365-2591.1995.tb00307.x

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

The purpose of this study was to compare stiffness and resistance to fracture of four brands of nickel titanium K files. Instruments of sizes 15 to 40 were tested according to ANSI/ADA Specification No, 28, Resistance to fracture was determined by twisting and measuring the maximum torque and angular deflection at failure. Stiffness was determined by measuring the moment required to bend the instrument 45 degrees, The permanent deformation angle remaining between the tip and the flutes of the instruments after bending ceased was also recorded, Nickel titanium It files satisfied and far exceeded specification standards for stiffness, They also satisfied and exceeded the standards for angular deflection at failure, They met or exceeded the maximum torque at failure standards in all sizes except for the size 40 of the Maillefer Niti, and the size 30 of the Mac Spadden Niti. Nickel titanium It files presented a null permanent deformation angle, Clinical studies are required to evaluate the influence of low bending moment on other properties such as breakage and canal transportation.

引用

页码：239 / 243

页数：5

共 18 条

[1]

Andreasen GF, Hilleman TB, An evaluation of 55‐cobalt substitued Nitinol wire for use in orthodontics, Journal of American Dental Association, 82, pp. 1373-1375, (1971)

[2]

Revised American National Standards Institute/American Dental Association Specification No. 28 for Root Canal Fifes and Reamers, Type K, (1881)

[3]

Burston CJ, Qin B, Morton JY, Chinese Niti wire. A new orthodontic alloy, American journal of Orthodontics, 87, pp. 445-452, (1985)

[4]

Camps J, Pertot WJ, Torsional and stiffness properties of Canal Master U stainless steel and nitinol instruments, Journal of Endodontics, 20, pp. 395-398, (1994)

[5]

Glosson CR, Haller RH, Dove SB, Del Rio CE, Comparison of root canal preparation using Ni‐TI hand, Ni‐Ti engine‐driven. and K‐Flex endodontic instruments, Journal of Endodontics, 21, pp. 146-151, (1995)

[6]

Hudgins JJ, Bagby MD, Erickson, The effect of long‐term deflection on permanent deformation of Nickel‐titanium arehwires, The Angle Orthodontist, 60, pp. 283-287, (1991)

[7]

Kapila S, Sachdeva R, Mechanical properties and clinical applications of orthodontic wires, American Journal of Orthodontics and Dentofacial Orthopedics, 96, pp. 100-109, (1989)

[8]

Lee JH, Andreasen GF, Lakes RS, Thermomecanical study of Ni‐ti alloys, journal of Biomedical Materials Research, 22, pp. 573-588, (1988)

[9]

Mayhew MJ, Kusy RP, Effects of sterilization on the mechanical properties and the surface topography of nickel‐titanium arch wires, American journal of Orthodontics and Dentofacial Orthopedics, 93, pp. 232-236, (1988)

[10]

Mihura F, Mogi M, Ohura Y, Hamanaka H, The superelastic property of the Japanese Niti alloy wire for use in orthodontics, American journal of Orthodontics and Dentofacial Orthopedics, 90, pp. 1-10, (1986)

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