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US6325805: Shape memory alloy staple

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Filing Information

Inventor(s) James Ogilvie · Troy D. Drewry · Michael C. Sherman ·
Assignee(s) SDGI Holdings, Inc. ·
Attorney/Agent(s) Woodard, Emhardt, Naughton, Moriarty & McNett ·
Primary Examiner Kevin Shaver ·
Assistant Examiner Michael B. Priddy ·
Application Number US9421903
Filing date 10/20/1999
Issue date 12/04/2001
Predicted expiration date 10/20/2019
U.S. Classifications 606/75  · 606/72  ·
International Classifications --
Kind CodeB1
International Classifications 606 72 · 606 75 · 606 78 · 606219 · 606200 · 606 69 ·
Related U.S. Application DataThis application claims benefit of Provisional No. 60/130,909 filed Apr. 23, 1999.
27 Claims, 12 Drawings


Abstract

A fusionless method of correcting spinal deformities in growing adolescents is disclosed utilizing a shape memory alloy staple. Various embodiments of the shape memory alloy staple include features such as barbs on the inner and outer surfaces of the prongs in the shape memory alloy staple as well as the use of notches on the crossbar or cross plate connecting the prongs to the shape memory alloy staple. In some embodiments, the shape memory alloy staple has an aperture defined through the cross plate for receiving a bone screw or other bone anchor which in turn allows the interconnection of a longitudinal member.

Independent Claims | See all claims (27)

  1. 1. A spinal staple, comprising: a first prong; a second prong; a bridge member interconnecting said first and second prongs and including a plurality of notches, said plurality of notches permitting independent seating of said first and second prongs; and wherein at least a portion of said staple is formed of a shape memory material having a memorized state and a deformed state, said first and second prongs being disposed closer to one another in said memorized state than in said deformed state.
  2. 17. A spinal staple, comprising: a cross member; a first leg extending from a first end portion of said cross member; a second leg extending from a second end portion of said cross member; and wherein said first and second legs each have an inwardly facing surface and an outwardly facing surface, each of said surfaces defining a plurality of barbs; and wherein at least a portion of said staple is formed of a shape memory material having a memorized state and a deformed state, said first and second legs being disposed closer to one another in said memorized state than in said deformed state.

References Cited

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Other Publications

The Use of Nickel-Titanium Alloy in Orthopedic Surgery in China, Kuo, M.D.; Yang, M.D.; Zhang, M.D.; Yang; Yu, M.D.; Dai, M.D.; Hong; Ke, M.D.; Cai, M.D.; Tao, M.D.;
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Application of a NiTi Staple in the Metatarsal Osteotomy, Tang, Dai, Chen,
Applications of Shape Memory Effects, Besselink, Sachdeva, Memory Metal Holland, Memory Medical Systems, Publication date unknown.
The Use of a Memory Shape Staple in Cervical Anterior Fusion, Ricart, Proceedings of the Second International Conference on Shape Memory and Superelastic Technologies, Asilomar Conference Center, Pacific Grove, CA, USA, 1997.
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