Positioning system with cannulated implant

• US 20060015119A1
• Filed: 07/13/2005
• Published: 01/19/2006
• Est. Priority Date: 07/14/2004
• Status: Abandoned Application

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC), Smith & Nephew Orthopaedics Ag (Smith & Nephew PLC), Smith & Nephew Pte. Limited (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC), Smith & Nephew Orthopaedics Ag (Smith & Nephew PLC), Smith & Nephew Pte. Limited (Smith & Nephew PLC)
• Inventors: Tuma, Gregor, Plassky, Norman
• Application Number:
  US11/181,018
• Publication Number:
  US 20060015119A1
• Time in Patent Office: Days
• US Class Current: 606/99
• CPC Class Codes: A61B 2090/3983 Reference marker arrangements for use with image guided surgery
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/4607 of hip femoral endoprostheses
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30789 perpendicular with respect to each other
• CPC Class Codes: A61F 2002/3625 Necks
• CPC Class Codes: A61F 2002/365 Connections of heads to necks
• CPC Class Codes: A61F 2002/368 with lateral apertures, bores, holes or openings, e.g. for reducing the mass, for receiving fixation screws or for communicating with the inside of a hollow shaft
• CPC Class Codes: A61F 2002/4632 using computer-controlled surgery, e.g. robotic surgery
• CPC Class Codes: A61F 2002/4688 having operating or control means
• CPC Class Codes: A61F 2002/4696 optical
• CPC Class Codes: A61F 2230/0019 rectangular

Abstract

A positioning system for placing an implant into a cavity of a bone, comprising a cannulated implant that is substantially smaller in the implanting area than the cavity and a positioning device that can hold the implant in a settable position in the cavity.

Claims

1. A positioning system for placing an implant into a cavity of a bone, comprising:

a cannulated implant, wherein the implant is substantially smaller in the implanting area than the cavity, and

a positioning device which can hold the implant in a settable position in the cavity.

2. The positioning system as set forth in claim 1, further comprising a first reference array assigned to the implant, said first reference array allowing the implant and a relative position of the implant with respect to the cavity to be localized and tracked by a surgical navigation system.

3. The positioning system as set forth in claim 2, further comprising a second reference array assigned to the bone, said second reference array allowing the bone to be localized and tracked by the surgical navigation system.

4. The positioning system as set forth in claim 2, wherein the first reference array is arranged fixedly on the implant or is arranged on the implant such that the first reference array can be moved and fixed.

5. The positioning system as set forth in claim 2, wherein the first reference array is arranged fixedly on the implant, and the implant is pre-calibrated for the navigation system.

6. The positioning system as set forth in claim 1, wherein the positioning device includes a first and second side, said positioning device arranged positionally fixed with respect to the bone on the first side, and the positioning device holds the implant on the second side.

7. The positioning system as set forth in claim 6, wherein the positioning device is arranged positionally fixed with respect to the bone by a holding device attached to the bone.

8. The positioning system as set forth in claim 7, wherein the holding device is a clamp.

9. The positioning system as set forth in claim 7, further comprising a reference array assigned to the holding device, said reference array allowing the holding device to be localized and tracked by a surgical navigation system.

10. The positioning system as set forth in claim 9, wherein the reference array is arranged fixedly on the holding device or is arranged on the holding device such that it can be moved and fixed.

11. The positioning system as set forth in claim 1, wherein the positioning device comprises a mechanical or electromechanical setting device which allows the implant to be longitudinally and/or transversely shifted and/or rotated in the cavity.

12. The positioning system as set forth in claim 1, wherein the implant comprises:

an implant head;

an inlet; and

peripheral outlets for a fixing mass, wherein the inlet is a separately provided inlet or leads through the interface for receiving the implant head.

13. The positioning system as set forth in claim 1, wherein the positioning system allows the implant and a relative position of the implant with respect to the cavity to be localized and tracked by intra-operative x-ray controlling.