Hip resurfacing surgical guide tool

• US 8,734,455 B2
• Filed: 02/23/2009
• Issued: 05/27/2014
• Est. Priority Date: 02/29/2008
• Status: Active Grant

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: Otismed Corporation (Stryker Corporation)
• Inventors: Park, Ilwhan, Koehle, Michael, Deveza, Lorenzo R.
• Primary Examiner(s): Boles, Sameh
• Assistant Examiner(s): HANNA, SAMUEL SALEEB
• Application Number:
  US12/390,667
• Publication Number:
  US 20090222015A1
• Time in Patent Office: 1,919 Days
• Field of Search: 606 79- 99, 623/22.11, 623/22
• US Class Current: 606/89
• CPC Class Codes: A61B 17/15 Guides therefor arrangements for guiding straight saw blades in general B23D51/025
• CPC Class Codes: A61B 17/175 for preparing the femur for hip prosthesis insertion
• CPC Class Codes: A61B 2017/568 produced with shape and dimensions specific for an individual patient
• CPC Class Codes: A61B 2034/102 Modelling of surgical devices, implants or prosthesis
• CPC Class Codes: A61B 2034/105 Modelling of the patient, e.g. for ligaments or bones
• CPC Class Codes: A61B 2034/107 Visualisation of planned trajectories or target regions
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61F 2/3603 implanted without ablation of the whole natural femoral head endoprosthetic cartilage A61F2/30756
• CPC Class Codes: A61F 2/3609 Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts A61F2/3601 takes precedence
• CPC Class Codes: A61F 2002/30878 with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/505 using CAD-CAM techniques or NC-techniques
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing
• CPC Class Codes: G05B 19/41885 characterised by modeling, simulation of the manufacturing system
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

Disclosed herein is a tool for guiding a drill hole along a central axis of a femur head and neck for preparation of a femur head that is the subject of a hip resurfacing surgery. In one embodiment, the tool includes a mating region and a guide hole. The mating region is configured to matingly receive a predetermined surface of the femur. The mating region and guide hole are positionally correlated or referenced with each other such that when the mating region matingly receives the predetermined surface of the femur, the guide hole will be generally coaxial with a central axis extending through the femur head and the femur neck.

Claims

1. A surgical guide tool for use in hip resurfacing surgery on a proximal portion of a femur having a head, a neck extending distally from the head, a surface region distal the head, a bone axis extending through centers of the head and neck, a superior-posterior region of the neck including a narrow band that follows along an intertrochanteric crest, a superior-anterior region of the neck, a cartilage covering the head, a tubercle, an anterior greater trochanter, an origin of a obturator internus, a superior junction between the posterior and anterior surfaces of the neck, and a trochanteric fossa, the tool comprising:

a body including a guide hole and a mating region configured to matingly contact the surface region, the guide hole including a hole axis, the guide hole and mating region being positioned relative to each other so the hole axis is generally coaxially aligned with the bone axis when the mating region matingly contacts the surface region, wherein the mating region is generally an identical negative shape of the surface region that includes;

a first area that includes the at least a portion of the superior-posterior region of the neck including the narrow band that follows along the intertrochanteric crest and has the medial-lateral width of between approximately 0.5 mm and approximately 8 mm;

a second area that includes the at least a portion of the superior-anterior region of the neck starting between approximately 1 mm and approximately 5 mm after the cartilage covering the head terminates distally and extending between approximately 15 mm and approximately 35 mm to terminate before the tubercle; and

a third area that includes the region on the anterior greater trochanter, distal to the tubercle, and inferior to the origin of the obturator internus;

wherein the first area, the second area, and the third area are each separated by points of non-contact between the mating region and the surface region.

2. The tool of claim 1, wherein the first area and the second area are separated by a first point of non-contact between the mating region and the surface region, the first point including the superior junction between the posterior and anterior surfaces of the neck.

3. The tool of claim 2, wherein the second area and the third area are separated by a second point of non-contact between the mating region and the surface region, the second point including the tubercle.

4. The tool of claim 1, wherein the surface region further includes a fourth area including an area that extends along the intertrochanteric crest.

5. The tool of claim 4, wherein the first area and the fourth area are separated by a third point of non-contact between the mating region and the surface region, the third point including an area that spans portions of the trochanteric fossa.