Method of forming a temporary implant

• US 6,361,731 B1
• Filed: 11/10/2000
• Issued: 03/26/2002
• Est. Priority Date: 07/15/1998
• Status: Expired due to Term

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Smith, Daniel Bryce, Ebert, Frank, Vandewalle, Mark V.
• Primary Examiner(s): DAVIS, ROBERT B
• Application Number:
  US09/710,293
• Time in Patent Office: 501 Days
• Field of Search: 264/317, 264/318, 264/328.17, 264/328.1, 264/271.1, 264/279.1, 623/901
• US Class Current: 264/271.1
• CPC Class Codes: A61B 17/8805 for introducing fluid filler into bone or extracting it A61B17/7097, A61B17/8833 take precedence
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• CPC Class Codes: A61F 2/30942 for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2002/30004 the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
• CPC Class Codes: A61F 2002/30014 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2002/30133 kidney-shaped or bean-shaped
• CPC Class Codes: A61F 2002/30158 trapezoidal
• CPC Class Codes: A61F 2002/30383 made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
• CPC Class Codes: A61F 2002/30448 using adhesives
• CPC Class Codes: A61F 2002/30561 breakable or frangible
• CPC Class Codes: A61F 2002/30672 temporary
• CPC Class Codes: A61F 2002/30677 Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/30957 using a positive or a negative model, e.g. moulds
• CPC Class Codes: A61F 2002/30975 made of two halves
• CPC Class Codes: A61F 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3625 : Necks
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/005 : using adhesives
• CPC Class Codes: A61F 2230/0015 : Kidney-shaped, e.g. bean-shaped
• CPC Class Codes: A61F 2230/0026 : trapezoidal
• CPC Class Codes: A61F 2250/0014 : having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
• CPC Class Codes: A61F 2250/0018 : differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00353 : Bone cement, e.g. polymethylmethacrylate or PMMA
• CPC Class Codes: B29C 2033/0005 : with transparent parts, e.g. permitting visual inspection of the interior of the cavity
• CPC Class Codes: B29C 33/405 : Elastomers, e.g. rubber B29C33/50 takes precedence
• CPC Class Codes: B29C 39/003 : characterised by the choice of material
• CPC Class Codes: B29K 2083/00 : Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
• CPC Class Codes: B29K 2995/0029 : Translucent
• CPC Class Codes: B29L 2031/7532 : Artificial members, protheses
• CPC Class Codes: Y10S 623/901 : Method of manufacturing prosthetic device

Abstract

A method for forming a temporary orthopedic implant used in an orthopedic surgical procedure. The method includes mixing bone cement during a surgical procedure. An appropriately sized cement mold is selected which is translucent and includes an input port. The cement mold is filled with bone cement to form the temporary implant. A surgeon determines that the cement mold is fully filled by viewing through the translucent cement mold. The surgeon further fills the cement mold by directing a nozzle within the input port of the cement mold. The cement mold may further be pierced to relieve any air pockets formed in the cement mold. The temporary implant is then subsequently implanted into a patient. The temporary implant may also include a re-enforcement member included into the temporary implant.

Claims

1. A method of forming a temporary implant, said method comprising:

mixing bone cement during a surgical procedure;

selecting an appropriately sized cement mold that is translucent;

filling the cement mold with the bone cement to form the temporary implant;

determining that the cement mold is substantially filled by viewing through the translucent cement mold; and

implanting the temporary implant into a patient.

2. The method as defined in claim 1 further comprising mixing antibiotic with the bone cement during the surgical procedure.

3. The method as defined in claim 1 further comprising loading a cement gun having a nozzle with the bone cement.

4. The method as defined in claim 3 further comprising directing the nozle of the cement gun within the cement mold to insure that the cement mold is substantially filled with the bone cement.

6. The method as defined in claim 1 further comprising tearing the cement mold away from cured bone cement.

8. The method as defined in claim 1 further comprising providing a re-enforcement member fitted within the cement mold.

5. A method of forming a temporary implant, said method comprising:

mixing bone cement during a surgical procedure;

selecting an appropriately sized cement mold that is translucent;

filling the cement mold with the bone cement to form the temporary implant;

determining that the cement mold is substantially filled by viewing through the translucent cement mold;

supporting the cement mold by way of a foot extending from the cement mold to enable the cement mold to cure; and

implanting the temporary implant into a patient.

7. A method of forming a temporary implant, said method comprising:

mixing bone cement during a surgical procedure;

selecting an appropriately sized cement mold that is translucent;

filling the cement mold with the bone cement to form the temporary implant;

determining that the cement mold is substantially filled by viewing through the translucent cement mold;

piercing the cement mold to relieve an air pocket formed in the cement mold; and

implanting the temporary implant into a patient.

9. A method of forming a temporary implant, said method comprising:

mixing bone cement during a surgical procedure;

selecting an appropriately sized cement mold having an input port;

filling a cement gun having a nozzle with the bone cement;

inserting the nozzle of the cement gun into the input port of the cement mold;

filling the cement mold with bone cement by way of directing the nozzle within the cement mold to substantially fill the cement mold to form the temporary implant; and

implanting the temporary implant into a patient.

10. The method as defined in claim 9 further comprising mixing antibiotic with the bone cement during the surgical procedure.

12. The method as defined in claim 9 further comprising tearing the cement mold away from cured bone cement.

14. The method as defined in claim 9 further comprising providing a cement mold that is translucent and determining that the cement mold is filled by viewing through the translucent cement mold.

15. The method as defined in claim 9 further comprising providing a re-enforcement member fitted within the cement mold.

11. A method of forming a temporary implant, said method comprising:

mixing bone cement during a surgical procedure;

selecting an appropriately sized cement mold having an input port;

filling a cement gun having a nozzle with the bone cement;

inserting the nozzle of the cement gun into the input port of the cement mold;

filling the cement mold with bone cement by way of directing the nozzle within the cement mold to substantially fill the cement mold;

supporting the cement mold by way of a foot extending from the cement mold to enable the cement mold to cure; and

implanting the temporary implant into a patient.

13. A method of forming a temporary implant, said method comprising:

mixing bone cement during a surgical procedure;

selecting an appropriately sized cement mold having an input port;

filling a cement gun having a nozzle with the bone cement;

inserting the nozzle of the cement gun into the input port of the cement mold;

filling the cement mold with bone cement by way of directing the nozzle within the cement mold to substantially fill the cement mold;

piercing the cement mold to relieve an air pocket formed in the cement mold; and

implanting the temporary implant into a patient.

16. A method of forming a temporary implant, said method comprising:

mixing bone cement during a surgical procedure;

selecting an appropriately sized cement mold that is pierceable;

filling the cement mold with the bone cement to form the temporary implant;

piercing the cement mold to relieve an air pocket formed within the cement mold; and

implanting the temporary implant into a patient.

17. The method as defined in claim 16 further comprising mixing antibiotic with the bone cement during the surgical procedure.

18. The method as defined in claim 16 further comprising loading a cement gun having a nozzle with the bone cement.

19. The method as defined in claim 18 further comprising directing the nozzle of the cement gun within the cement mold to insure that the cement mold is substantially filled with the bone cement.

20. The method as defined in claim 16 further comprising providing a cement mold that is translucent and determining the location of the air pocket by viewing through the translucent cement mold.

21. The method as defined in claim 16 further comprising supporting the cement mold by way of a foot extending from the cement mold to enable the cement mold to cure.

22. The method as defined in claim 16 further comprising tearing the cement mold away from cured bone cement.

23. The method as defined in claim 16 further comprising providing a re-enforcement member fitted within the cement mold.