Surgery – Instruments – Orthopedic instrumentation
Reexamination Certificate
1999-07-29
2001-05-08
Recla, Henry J. (Department: 3731)
Surgery
Instruments
Orthopedic instrumentation
C606S08600R
Reexamination Certificate
active
06228092
ABSTRACT:
BACKGROUND ART
U.S. Pat. Nos. 5,192,283 and 5,470,336, for which I am co-inventor, are directed to a method and apparatus for performing hip prosthesis revision surgery which includes preparation of the enlarged cavity left after removal of the original prosthesis. A tamp having a longitudinal passageway extending longitudinally through the stem portion thereof and a guide wire positioned in the cavity function to compact bone graft material in the enlarged cavity and form a contoured cavity for receiving the new hip prosthesis. The tamp disclosed in such patents provides good compaction of the bone graft material contacted by the tapered stem from the distal end to an area somewhat spaced from the proximal end. However, the tamp disclosed in such prior art patents has no ability to provide compaction for bone graft material in the vicinity of the proximal end of the femur. My U.S. Pat. No. 5,683,395 discloses and claims a cannulated tamp having a flange extending outwardly from the proximal end of the tamp. One embodiment of my U.S. Pat. No. 5,683,395 discloses a tamp which has a stem and a network of connector passageways which may be utilized to drain blood and other liquids from the cavity being prepared.
DISCLOSURE OF THE INVENTION
The present invention is directed to a cannulated tamp and to a method for using, which tamp is formed as a hollow member with walls having a thickness of ½ to 3 millimeters (mm). It is provided with perforations throughout, which perforations are 2 to 5 mm in diameter. The tamp has a smooth outer surface which is preferably polished and tapers from a relatively large size at its proximal end to a smaller size at its distal end. If desired, it may be triple tapered. Preferably, it is shaped similar to the shape of the stem of the femoral hip prosthesis to be implanted in the prepared cavity; however, where it is to be used in preparing a cavity to receive a femoral stem prosthesis of a type utilizing bone cement, the tamp will be oversized (i.e. larger than the intended femoral stem prosthesis) at least 2 mm circumferentially in order to allow space in the cavity for an adequate thickness of bone cement between the stem of the prosthesis and the wall of the prepared cavity. Proximally medially it should be oversized 4-6 mm and the length should be oversized 15-30 mm. The distal end of the tamp tapers to an opening through which a guide wire may extend. The proximal end of the tamp has a wall with an aperture for receiving the guide wire. The guide wire controls the positioning of the tamp during use of the tamp for compacting the bone graft material. Following compacting of the bone graft material, the proximal and distal guide wire openings may be used to receive a suction tube extending through the perforated tamp. The proximal end is also provided with a handle attachment abutment which may be engaged by a handle and, if desired, a second opening which may be utilized for inserting a second vacuum tube into the cannulated tamp.
The cannulated perforated tamp of the present invention may be formed from a wide variety of materials including cobalt chrome molybdenum, stainless steel, titanium or a compatible durable material.
REFERENCES:
patent: 4274408 (1981-06-01), Nimrod
patent: 4337773 (1982-07-01), Raftopoulos et al.
patent: 4338925 (1982-07-01), Miller
patent: 4341206 (1982-07-01), Perrett et al.
patent: 4399814 (1983-08-01), Pratt, Jr. et al.
patent: 4623353 (1986-11-01), Buechel et al.
patent: 4678471 (1987-07-01), Noble et al.
patent: 4686972 (1987-08-01), Kurland
patent: 4706659 (1987-11-01), Mathews et al.
patent: 4751922 (1988-06-01), DiPietropolo
patent: 4815454 (1989-03-01), Dozier, Jr.
patent: 4846161 (1989-07-01), Roger
patent: 4860735 (1989-08-01), Davey et al.
patent: 4865608 (1989-09-01), Brooker, Jr.
patent: 4873969 (1989-10-01), Huebsch
patent: 4881536 (1989-11-01), Nobel et al.
patent: 4896662 (1990-01-01), Noble
patent: 4904262 (1990-02-01), Bensmann
patent: 4919153 (1990-04-01), Chin
patent: 4919673 (1990-04-01), Willert et al.
patent: 4919679 (1990-04-01), Averill et al.
patent: 4963155 (1990-10-01), Lazzeri et al.
patent: 4986826 (1991-01-01), Roger
patent: 4994065 (1991-02-01), Gibbs et al.
patent: 4994085 (1991-02-01), Sawai et al.
patent: 5015817 (1991-05-01), Kranz
patent: 5021063 (1991-06-01), Tager
patent: 5047035 (1991-09-01), Mikhail et al.
patent: 5047061 (1991-09-01), Brown
patent: 5061287 (1991-10-01), Feiler
patent: 5078746 (1992-01-01), Garner
patent: 5085548 (1992-02-01), Moyles
patent: 5108405 (1992-04-01), Mikhail et al.
patent: 5116377 (1992-05-01), Skripitz
patent: 5192282 (1993-03-01), Draeuert
patent: 5192283 (1993-03-01), Ling et al.
patent: 5197841 (1993-03-01), Tanaka
patent: 5201769 (1993-04-01), Schutzer
patent: 5314489 (1994-05-01), Hoffman et al.
patent: 5330536 (1994-07-01), Tager et al.
patent: 5366441 (1994-11-01), Crawford et al.
patent: 5443469 (1995-08-01), Smith
patent: 5470336 (1995-11-01), Ling et al.
patent: 5480452 (1996-01-01), Hofmann et al.
patent: 5507830 (1996-04-01), De Mane et al.
patent: 5514135 (1996-05-01), Earle
patent: 5683395 (1997-11-01), Mikhail
patent: 5693099 (1997-12-01), Harle
patent: 5707049 (1998-01-01), Schmidt
patent: 5718707 (1998-02-01), Mikhail
patent: 5800437 (1998-09-01), Gustilo et al.
patent: 5814049 (1998-09-01), Pratt et al.
patent: 5925051 (1999-07-01), Mikhail
patent: 3108491 (1981-11-01), None
patent: 2615097 (1987-05-01), None
patent: 0 315 283 (1988-11-01), None
patent: 92/03993 (1992-03-01), None
International Search Report for PCT/US00/19114 which corresponds to this U.S. patent application.
Kenneth J. Hock, M.D., “Economy is the Mother of a Cement Removal Technique”,Orthopedics Today, pp. 18 & 19, Sep. 1989.
Waldes Truarc Retaining Rings, Jan. 1981, p. 5 (Selector Guide).
John N. Insall, M.D., et al., “Principles and Techniques of Knee Replacement”, published in 1983 by New York Society for the Relief of the Ruptured and Crippled, pp 20-21.
John Insall, M.D. and Albert H. Burstein, Ph.D., “Insall/Burstein™ Total Knee System” Pamphlet.
W.E. Michael Mikhail, M.D. and Lars Weidenhielm, M.D., “The CPT Hip Prosthesis” Pamphlet (1994).
Osteonics Restoration Cemented Hip System for Revision Surgery, 4 pages.
Emch, Schaffer, Schaub & Porcello & Co., L.P.A.
Ngo Lien
Recla Henry J.
LandOfFree
System for performing hip prosthesis surgery does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for performing hip prosthesis surgery, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for performing hip prosthesis surgery will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2448615