Dentistry – Orthodontics – Means to transmit or apply force to tooth
Patent
1990-03-29
1991-09-10
Mancene, Gene
Dentistry
Orthodontics
Means to transmit or apply force to tooth
433 18, 433 20, A61C 300
Patent
active
050469487
ABSTRACT:
A continuous-length orthodontic coil spring is made from a shape-memory alloy wire wound into a coil. The coil defines a plurality of open coil sections defining spaces between the turns thereof, and closed coil sections formed between the open coil sections. The closed coil sections are tightly wound with insubstantial spacing between the turns thereof. The coil spring is made of a Ni-Ti alloy wire, and is heat treated to impart a predetermined range of spring force within a superelastic zone of deflection. The continuous-length coil spring is cut through the closed coil sections to form several shorter-length coil springs therefrom. The closed coil sections on either end of the shorter-length coil springs are thus adapted to engage the orthodontic brackets mounted to a patient's teeth, to accurately impart the force of the spring to the brackets.
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20 Kirk-Othmer, Encyclopedia of Chemical Technology, 726, 733 (3d ed. 1982), New York.
Miura et al., "The Super-Elastic Japanese NiTi Alloy Wire for use in Orthodontics," American J. of Orthodontics and Dentofacial Orthopedics, vol. 94, No. 2, Aug. 1988, pp. 89-96.
Abstract of "Studies on the Super-Elastic Japanese NiTi Alloy Coil Springs" in the Program for the 34th Annual Meeting of the Japanese Association for Dental Research, held Dec. 4 and 5, 1986.
Abstract of "Studies on Mechanical Properties of New Superelastic NiTi Wire," from the 41st Annual Session of the Japan Orthodontic Society, held Sep. 17-19th, 1982.
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"Characteristics of Deformation and Transformation Pseudoelasticity in Ti-Ni Allous," Miyazaki et al., Journal De Physique, vol. C4, No. 12, pp. C4-255-260, Dec. 1982.
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Literature from Associated Spring, Barnes Group Inc., pp. 13 and 15.
GAC International, Inc.
Lynch Michael
Mancene Gene
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