US3719186A - Surgical instrument for placement of bone pins and holes therefor - Google Patents

Surgical instrument for placement of bone pins and holes therefor Download PDF

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US3719186A
US3719186A US00136345A US3719186DA US3719186A US 3719186 A US3719186 A US 3719186A US 00136345 A US00136345 A US 00136345A US 3719186D A US3719186D A US 3719186DA US 3719186 A US3719186 A US 3719186A
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outer cannula
end
cannula
surgical instrument
inner
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US00136345A
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J Merig
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UAB RESEARCH FOUNDATION NON-PROFIT CORP
ALABAMA IN BIRMINGHAM, University of
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17Guides or aligning means for drills, mills, pins or wires
    • A61B17/1739Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1644Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans using fluid other than turbine drive fluid
    • A61B2017/1651Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans using fluid other than turbine drive fluid for cooling
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/08Accessories or related features not otherwise provided for
    • A61B2090/0801Prevention of accidental cutting or pricking
    • A61B2090/08021Prevention of accidental cutting or pricking of the patient or his organs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2217/00General characteristics of surgical instruments
    • A61B2217/002Auxiliary appliance
    • A61B2217/005Auxiliary appliance with suction drainage system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2217/00General characteristics of surgical instruments
    • A61B2217/002Auxiliary appliance
    • A61B2217/007Auxiliary appliance with irrigation system
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S606/00Surgery
    • Y10S606/916Tool for installing or removing orthopedic fastener

Abstract

A surgical instrument for placement of bone pins and holes therefor having an outer cannula telescopically receiving an inner cannula which in turn telescopically receives a stylus. The outer cannula has symmetrically separable components and one end thereof engages a bone in which a hole is drilled. A tool is detachably connected to the outer cannula for retaining the outer cannula assembly. An inner cannula terminates inwardly of said one end of the outer cannula and a stylus extends to a point adjacent said one end of the outer cannula.

Description

United States Patent [1 1 Merig, Jr.

[ 1 March 6, 1973 SURGICAL INSTRUMENT FOR PLACEMENT OF BONE PINS AND HOLES THEREFOR [75] Inventor: James J. Merig, Jr., Birmingham,

Ala.

[73] Assignee: University of Alabama mingham, Birmingham, Ala.

[22] Filed: April 22,1971

[21] Appl.No.: 136,345

in Bir- 2 :11,! g Ms:

3,587,560 6/1971 Glassman ..128/310 3,598,108 8/1971 Jamshidi ....128/310 3,653,388 4/1972 Tenckhofi ..128/347 FOREIGN PATENTS OR APPLICATIONS 549,999 12/ 1942 Great Britain 128/305 1,213,369 10/1959 France ..128/305 Primary Examiner-Channing L. Pace Attorney-Jennings, Carter & Thompson [57] ABSTRACT A surgical instrument for placement of bone pins and holes therefor having an outer cannula telescopically receiving an inner cannula which in turn telescopically receives a stylus. The outer cannula has symmetrically separable components and one end thereof engages a bone in which a hole is drilled. A tool is dctachably connected to the outer cannula for retaining the outer cannula assembly. An inner cannula terminates inwardly of said one end of the outer cannula and a stylus extends to a point adjacent said one end of the outer cannula.

10 Claims, 4 Drawing Figures SURGICAL INSTRUMENT FOR PLACEMENT OF BONE PINS AND HOLES THEREFOR The invention described herein was made in part in the course of, or under, a grant from the U.S. Public Health Service, Department of Health, Education and Welfare.

BACKGROUND OF THE INVENTION This invention relates to a surgical instrument and more particularly to an instrument for the placement of bone pins and holes therefor, such as where external pin fixation techniques are employed.

l-leretofore in the art to which my invention relates, difficulties have been encountered in drilling holes into bones at precise locations without damage to surrounding soft tissues. Also, difficulties have been encountered in the insertion of the pin or screw into the drilled hole without damage to the surrounding soft tissue. Furthermore, visualization of pre-placed bur holes is difficult, thus requiring tactile manipulation of the pin into the bur hole. With prior art methods, the surrounding soft tissue is often contaminated with debris due to the difficulty in drilling the hole at the proper location and the difficulty in manipulating the pin whereby it enters the drilled hole. This is especially true in view of the fact that relatively large incisions are often required in the external soft tissue in order to position the drill bur and the bone pin.

BRIEF SUMMARY OF THE INVENTION In accordance with my invention, I provide an instrument for the placement of bone pins and holes therefor wherein an inner cannula serves as a guide for the placement of the bur hole in the bone and an outer cannula serves as a guide for the placement of the bone pin within the hole. A stylus telescopes into the inner cannula to prevent entrapment of soft tissue when directing the apparatus to a bone. The outer cannula is divided longitudinally of its length to provide symmetrically separable sections which are held in assembled position by a tool which is detachably connected to the outer cannula and also serves as a handle member for the outer cannula and the components carried thereby whereby the bone pins may be placed at selected inclinations.

A surgical instrument embodying features of my invention is illustrated in the accompanying drawing, forming a part of this application, in which:

FIG. 1 is a side elevational view, partly broken away and in section, showing the instrument assembled;

FIG. 2 is a sectional view taken generally along the line 2-2 of FIG. 1;

FIG. 3 is a view taken along line 33 of FIG. 1, drawn to a smaller scale; and

FIG. 4 is a side elevational view showing the outer cannula with the sections thereof in assembled position.

Referring now to the drawing for a better understanding of my invention, I show an outer cannula having, when assembled, a cylindrical end portion 11 which is formed integrally with a reduced diameter cylindrical portion 12. As shown in FIG. 4, the outer cannula 10 is divided along a centrally disposed line 13 to provide symmetrical and identical halves or sections at each side of the line 13 which are separable from each other.

To retain the separate halves or sections of the outer cannula in assembled relationship to each other, as shown in FIG. 1, I provide an outwardly opening locking groove 14 in the lower portion of the outer cannula 10 which corresponds to and slidably engagescontact surfaces 16 which define the sides of an outwardly opening slot 17 in an elongated handle 18. Preferably, the handle 18 is relatively flat whereby it requires a minimum of space to manipulate the tool. Accordingly, the recesses 14 are of a dove-tail shape which receive corresponding, inclined surfaces 16 defined along the sides of the U-shaped slot 17 in the handle 18. The handle 18 thus serves as a wrench to hold the outer cannula at selected inclinations and at the same time retains the separate halves of the outer cannula in assembled relation until the tool is separated from the outer cannula.

As shown in FIGS. 1 and 4, the end of the outer cannula opposite the enlarged diameter end 1 1 is serrated as at 19 to facilitate stabilization of the apparatus on the cortical bone and prevent movement of the apparatus while placing and drilling the bur hole and during the installation of the bone pin. The enlarged diameter portion of the outer cannula defines a cuplike receptacle 21 which is adapted to receive a conventional type wrench for seating the bone pin in a manner well understood in the art to which my invention relates.

Telescoping into the outer cannula 10 is an inner cannula 22 having an enlarged diameter portion 23 which slidably engages the inner surface of the cup-like receptacle 21 of the outer cannula 10. The enlarged diameter, cylindrical portion 23 of the inner cannula 22 is formed integrally with a reduced diameter cylindrical portion 24 which terminates inwardly of the end of the cylindrical member 12 carrying the serrations 19. Preferably, the cylindrical, reduced diameter portion 24 of the inner cannula 22 terminates approximately five millimeters inwardly of the end of the outer cannula 10 carrying the serrations 19 to provide a space for receiving water for coolant while the bur is in motion. This space also allows the serrations 19 of the outer cannula 10 to engage the cortical bone without difiiculty and also prevents contact of the cutting edge of the bur with the adjacent inner surface of the inner cannula 22. The inner cannula 22 thus serves as a guide for the bur drill for placement of the but hole in the bone. The inner surface of the enlarged diameter portion 23 of the inner cannula 22 defines a cup-like receptacle 26 which will accommodate conventional bur-shafts and conventional hand pieces.

Telescoping into the reduced diameter, cylindrical portion 24 of the inner cannula 22 is a central, solid stylus 27 which extends to a position adjacent the serrations 19 on the outer cannula 10. Preferably, the stylus extends to a position slightly outwardly of the serrations 19 on the outer cannula to prevent the entrapment of soft tissue in the outer cannula 10 when directing the apparatus to a bone. As shown in FIG. 1, the portion of the stylus 27 within the confines of the cuplike receptacle 26 is enlarged in diameter to provide an annular shoulder 28 which limits movement of the stylus inwardly of the inner cannula 22.

From the foregoing description, the operation of my improved surgical instrument will be readily understood. A small incision is made through the skin and subcutaneous tissue over the proposed bone-pin site. The dimension of the incision should be approximately the same as the outer diameter of the cylindrical portion 12 of the outer cannula 10. A blunt dissection is performed to periosteum. With the incision thus made, the apparatus is directed to the bone with the stylus 27 in place and the outer'cannula held in assembled position by the tool 18. When bony contact is established, the stylus 27 is removed and the serrations 19 of the outer cannula 10 are stabilized in the cortical bone. The bore of the inner cannula 22 is filled with sterile water for cooling purposes. The shaft of the bur drill is then inserted through the inner cannula 22 and following bony contact of the cutting portion of the bur drill, a hole is drilled in the bone through one or both cortices. Since the lower end of the cylindrical portion 24 of the inner cannula 22 is spaced from the adjacent end of the outer cannula carrying the serrations l9, sufficient room is provided for rotation of the cutting aspect of the drill bur without engaging the inner surface of the cylindrical portion 24.

After the hole is drilled, the inner cannula 22 is removed and water is aspirated into and from the outer cannula to remove water and any possible debris. Preferably, sterile water irrigations are employed. The pin or screw, not shown, is then inserted into the cylindrical portion 12 of the outer cannula 10 whereby the pin automatically moves into the proper alignment with the opening drilled in the bone. With the bone pin in engagement with the bur hole, the pin is rotated by conventional means to completely or partially secure the pin to the bone with the outer cannula still in place. The large diameter cup-like receptacle 21 in the outer cannula l permits insertion of a suitable tool into the outer cannula for rotation of the bone pin or screw. After the bone pin or screw has been anchored to the bone, the tool 18 is disengaged from the grooved surface 14 of the outer cannula 10, thus permitting separation of the outer cannula in two parts along the separation line 13. With the two sections of the outer cannula thus separated, the outer cannula is removed from the soft tissue with the bone pin or screw remaining in place. The bone pin or screw is then completely secured in the bone if it was only partially secured prior to removal of the outer cannula.

From the foregoing, it will be seen that l have devised an improved surgical instrument for use in the placement of bone pins and drilled holes therefor. By providing means for guiding the shaft of the bur drill and the bone pin into proper engagement with the bone and preventing movement of the bur drill during the drilling operation, there is no damage to surrounding soft tissues since the bur drill and bone pin are manipulated within the confines of the apparatus. Also, surrounding soft tissue is not contaminated with debris due to the fact that debris is contained within the bore of the outer cannula 10 and any possible debris within the outer cannula is irrigated and aspirated prior to placement of the bone pin. Also, the entire procedure for placement of the bone pin is performed without the necessity of visualization of the pre-placed bur hole for tactile manipulation of the pin in the bur hole. Furthermore, my improved apparatus requires a minimal external soft tissue incision to obtain bony contact and placement of the bone pin and at the same time the ap- 1. A surgical instrument for use in the placement of bone pins and drilled holes therefor;

a. an outer cannula having separable components with one end of said outer cannula being adapted to be maintained in engagement with a bone in which a hole is to be drilled, a

b. a tool engagable with said separable components of said outer cannula holding said components together in assembled position while said tool is in one position relative to said components and releasing said components upon movement of said tool to another position,

; an inner cannula telescoping into said outer cannula with one end of said inner cannula terminating inwardly of said one end of said outer cannula, and

. a stylus telescoping into said inner cannula and extending to a point adjacent said one end of said outer cannula restraining the entrapment of so tissue in said outer cannula.

2. A surgical instrument as defined in claim 1 in which said one end of said outer cannula is serrated.

3. A surgical instrument as defined in claim 1 in which the end of said stylus adjacent said one end of said outer cannula is tapered.

4. A surgical instrument as defined in claim 1 in which the end of said outer cannula opposite said one end is enlarged and said inner cannula has an enlarged end portion fitting said one enlarged end of said outer cannula.

5. A surgical instrument as defined in claim 4 in which said enlarged end portions of said outer and inner cannulae are concentric, cylindrical members which communicate with reduced diameter, concentric, cylindrical portions, respectively, of said cannulae.

6. A surgical instrument as defined in claim 5 in which said stylus is provided with an outer surface which corresponds to and slidably engages a portion of the inner surface of said inner cannula.

7. A surgical instrument as defined in claim 6 in which said enlarged end portion of said inner cannula extends axially outwardly of said outer cannula and the adjacent end of said stylus extends axially outwardly of said inner cannula. I

8. A surgical instrument as defined in claim 1 in which said outer cannula is divided longitudinally into separate, matching sections with outwardly opening locking grooves in said sections and said tool is provided with contact surfaces along the edges of an outwardly opening recess therein which engage said locking grooves with a sliding fit to retain said sections in assembled position.

9. A surgical instrument as defined in claim 8 in which each locking groove is provided with an inner surface which flares outwardly toward said one end of said outer cannula and said contact surfaces on said tool correspond to and slidably engage the adjacent inner surfaces of said locking groove.

10. A surgical instrument as defined in claim 8 in which said tool is provided with an elongated handle 5 which projects outwardly of said outer cannula and supports said outer cannula while said outer cannula is in assembled position.

Claims (10)

1. A surgical instrument for use in the placement of bone pins and drilled holes therefor; a. an outer cannula having separable components with one end of said outer cannulA being adapted to be maintained in engagement with a bone in which a hole is to be drilled, b. a tool engagable with said separable components of said outer cannula holding said components together in assembled position while said tool is in one position relative to said components and releasing said components upon movement of said tool to another position, c. an inner cannula telescoping into said outer cannula with one end of said inner cannula terminating inwardly of said one end of said outer cannula, and d. a stylus telescoping into said inner cannula and extending to a point adjacent said one end of said outer cannula restraining the entrapment of soft tissue in said outer cannula.
1. A surgical instrument for use in the placement of bone pins and drilled holes therefor; a. an outer cannula having separable components with one end of said outer cannulA being adapted to be maintained in engagement with a bone in which a hole is to be drilled, b. a tool engagable with said separable components of said outer cannula holding said components together in assembled position while said tool is in one position relative to said components and releasing said components upon movement of said tool to another position, c. an inner cannula telescoping into said outer cannula with one end of said inner cannula terminating inwardly of said one end of said outer cannula, and d. a stylus telescoping into said inner cannula and extending to a point adjacent said one end of said outer cannula restraining the entrapment of soft tissue in said outer cannula.
2. A surgical instrument as defined in claim 1 in which said one end of said outer cannula is serrated.
3. A surgical instrument as defined in claim 1 in which the end of said stylus adjacent said one end of said outer cannula is tapered.
4. A surgical instrument as defined in claim 1 in which the end of said outer cannula opposite said one end is enlarged and said inner cannula has an enlarged end portion fitting said one enlarged end of said outer cannula.
5. A surgical instrument as defined in claim 4 in which said enlarged end portions of said outer and inner cannulae are concentric, cylindrical members which communicate with reduced diameter, concentric, cylindrical portions, respectively, of said cannulae.
6. A surgical instrument as defined in claim 5 in which said stylus is provided with an outer surface which corresponds to and slidably engages a portion of the inner surface of said inner cannula.
7. A surgical instrument as defined in claim 6 in which said enlarged end portion of said inner cannula extends axially outwardly of said outer cannula and the adjacent end of said stylus extends axially outwardly of said inner cannula.
8. A surgical instrument as defined in claim 1 in which said outer cannula is divided longitudinally into separate, matching sections with outwardly opening locking grooves in said sections and said tool is provided with contact surfaces along the edges of an outwardly opening recess therein which engage said locking grooves with a sliding fit to retain said sections in assembled position.
9. A surgical instrument as defined in claim 8 in which each locking groove is provided with an inner surface which flares outwardly toward said one end of said outer cannula and said contact surfaces on said tool correspond to and slidably engage the adjacent inner surfaces of said locking groove.
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Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817250A (en) * 1972-10-24 1974-06-18 Int Medical Devices Inc Instrument for performing a tracheostomy and other surgical procedures
US4179810A (en) * 1977-03-31 1979-12-25 Axel Kirsch Device for milling slots in a jawbone for mounting an endossal device
DE2838348A1 (en) * 1978-09-02 1980-03-06 Neuhaeuser Hans G Device for molding a knochenoeffnung, particularly in hip bone for inserting an artificial joint socket
US4341206A (en) * 1978-12-19 1982-07-27 Synthes Ag Device for producing a hole in a bone
US4461281A (en) * 1977-06-15 1984-07-24 Carson Robert W Arthroscopic surgical apparatus and method
US4653486A (en) * 1984-04-12 1987-03-31 Coker Tom P Fastener, particularly suited for orthopedic use
AT389044B (en) * 1987-11-18 1989-10-10 Leixnering Martin Dr Device for implanting a rod-shaped implant
US5782832A (en) * 1996-10-01 1998-07-21 Surgical Dynamics, Inc. Spinal fusion implant and method of insertion thereof
US5885299A (en) * 1994-09-15 1999-03-23 Surgical Dynamics, Inc. Apparatus and method for implant insertion
US5906616A (en) * 1994-09-15 1999-05-25 Surgical Dynamics, Inc. Conically shaped anterior fusion cage and method of implantation
US5968098A (en) * 1996-10-22 1999-10-19 Surgical Dynamics, Inc. Apparatus for fusing adjacent bone structures
US6042593A (en) * 1995-11-20 2000-03-28 Storz Endoskop Gmbh Shaving or cutting instrument
US6063088A (en) * 1997-03-24 2000-05-16 United States Surgical Corporation Method and instrumentation for implant insertion
US6190414B1 (en) 1996-10-31 2001-02-20 Surgical Dynamics Inc. Apparatus for fusion of adjacent bone structures
US6270501B1 (en) 1999-11-08 2001-08-07 The Regents Of The University Of Michigan Surgical method and apparatus and cannulated scalpel for use therein
US6287313B1 (en) 1999-11-23 2001-09-11 Sdgi Holdings, Inc. Screw delivery system and method
US20020091390A1 (en) * 1995-02-27 2002-07-11 Michelson Gary Karlin Methods and instrumentation for the surgical correction of human thoracic and lumbar spinal disease from the lateral aspect of the spine
US20020138144A1 (en) * 1995-02-17 2002-09-26 Michelson Gary Karlin Threaded frusto-conical interbody spinal fusion implants
US20020198532A1 (en) * 1993-06-10 2002-12-26 Sofamor Danek Holdings, Inc. Apparatus and method of inserting spinal implants
US6540753B2 (en) 2001-03-23 2003-04-01 Howmedica Osteonics Corp. Instrumentation for implant insertion
US20030065394A1 (en) * 1988-06-13 2003-04-03 Karlin Technology, Inc. Spinal fusion implant having a curved end
US20030158553A1 (en) * 1988-06-13 2003-08-21 Michelson Gary Karlin Instrumentation for the surgical correction of spinal disease
US6770074B2 (en) 1988-06-13 2004-08-03 Gary Karlin Michelson Apparatus for use in inserting spinal implants
US6899734B2 (en) 2001-03-23 2005-05-31 Howmedica Osteonics Corp. Modular implant for fusing adjacent bone structure
US20050165489A1 (en) * 1995-06-07 2005-07-28 Michelson Gary K. Frusto-conical spinal implant
US6929647B2 (en) 2001-02-21 2005-08-16 Howmedica Osteonics Corp. Instrumentation and method for implant insertion
US20060084992A1 (en) * 1988-06-13 2006-04-20 Michelson Gary K Tubular member having a passage and opposed bone contacting extensions
US7291149B1 (en) 1995-06-07 2007-11-06 Warsaw Orthopedic, Inc. Method for inserting interbody spinal fusion implants
US20100179655A1 (en) * 2009-01-12 2010-07-15 Noah Hansell Expandable Vertebral Prosthesis
US20100298942A1 (en) * 2005-04-21 2010-11-25 Noah Hansell Expandable Vertebral Prosthesis
US20140081271A1 (en) * 2012-09-20 2014-03-20 Depuy Mitek, Llc Low profile reamers and methods of use
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Cited By (91)

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US3817250A (en) * 1972-10-24 1974-06-18 Int Medical Devices Inc Instrument for performing a tracheostomy and other surgical procedures
US4179810A (en) * 1977-03-31 1979-12-25 Axel Kirsch Device for milling slots in a jawbone for mounting an endossal device
US4461281A (en) * 1977-06-15 1984-07-24 Carson Robert W Arthroscopic surgical apparatus and method
DE2838348A1 (en) * 1978-09-02 1980-03-06 Neuhaeuser Hans G Device for molding a knochenoeffnung, particularly in hip bone for inserting an artificial joint socket
US4273117A (en) * 1978-09-02 1981-06-16 Neuhaeuser Hans G Apparatus for drilling bone
US4341206A (en) * 1978-12-19 1982-07-27 Synthes Ag Device for producing a hole in a bone
US4653486A (en) * 1984-04-12 1987-03-31 Coker Tom P Fastener, particularly suited for orthopedic use
AT389044B (en) * 1987-11-18 1989-10-10 Leixnering Martin Dr Device for implanting a rod-shaped implant
US20040078039A1 (en) * 1988-06-13 2004-04-22 Michelson Gary Karlin Method for forming through a guard an implantation space in the human spine
US7722619B2 (en) 1988-06-13 2010-05-25 Warsaw Orthopedic, Inc. Method of maintaining distraction of a spinal disc space
US7686805B2 (en) 1988-06-13 2010-03-30 Warsaw Orthopedic, Inc. Methods for distraction of a disc space
US7914530B2 (en) 1988-06-13 2011-03-29 Warsaw Orthopedic, Inc. Tissue dilator and method for performing a spinal procedure
US20060200138A1 (en) * 1988-06-13 2006-09-07 Sdgi Holdings, Inc. Surgical instrument for distracting a spinal disc space
US8758344B2 (en) 1988-06-13 2014-06-24 Warsaw Orthopedic, Inc. Spinal implant and instruments
US8734447B1 (en) 1988-06-13 2014-05-27 Warsaw Orthopedic, Inc. Apparatus and method of inserting spinal implants
US7534254B1 (en) 1988-06-13 2009-05-19 Warsaw Orthopedic, Inc. Threaded frusto-conical interbody spinal fusion implants
US7491205B1 (en) 1988-06-13 2009-02-17 Warsaw Orthopedic, Inc. Instrumentation for the surgical correction of human thoracic and lumbar spinal disease from the lateral aspect of the spine
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