Implant With Improved Surface Properties and Expansion Means

a technology of surface properties and implants, applied in the field of orthopaedic implants, can solve the problems of weakening of implants, difficult osseointegration to occur, and possible spaces presen

Inactive Publication Date: 2019-07-04
OSSIS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The expandable implants enhance osseointegration by filling voids, promoting bone growth and stability, and are suitable for revision, tumor, or deformity situations with localized bone deficiencies, providing a stable osseointegrative shell for standard implant cementation.

Problems solved by technology

Osseointegration involves the formation of a direct interface between an implant and bone, without intervening soft tissue, resulting in a firmly positioned implant that is unlikely to cause any pain or problem to the patient.
Any voids or depressions in the patient bone increase the chance of spaces being present between the implant and the surrounding bone, which makes it difficult for osseointegration to occur.
This can lead to weakening of the implant and discourage bone growth, as stress is unable to be transferred to the surrounding bone due to the void.
As placing a bone under stress promotes growth, such a situation is not optimal.
While these implants go some way to addressing the difficulties associated with curves and depressions within a patients anatomy, in some circumstances it is not possible to shape a patient-specific implant to fill voids, as having protrusions on the implant surface introduces difficulties with locating the implant correctly in the bone.

Method used

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  • Implant With Improved Surface Properties and Expansion Means
  • Implant With Improved Surface Properties and Expansion Means
  • Implant With Improved Surface Properties and Expansion Means

Examples

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Embodiment Construction

[0067]The implants of the current invention disclose implants with expandable regions that enable the outer contours of an orthopaedic implant to be extended once the implant has been positioned within a patient's body. Such expandable regions enable an implant to be designed that optimises the fit of the implant with a specific patient, providing a maximum surface area wherein the implant can mimic the naturally occurring bone contours of the patient.

[0068]The orthopaedic implants and methods of the present invention are designed to increase osseointegration with patient bone and cause accretion and strengthening of the existing bone by providing an implant that incorporates surface features that mimic those of healthy bone and / or specific features within a patient bone at a similar location in the body. By incorporating expandable regions into the outer walls of implants, voids that were previously either left empty or packed with bone graft may be filled with a portion of implant...

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Abstract

This invention relates to and orthopaedic implant having an expansion means adapted to increase the external surface area of the implant, the expansion means positioned to correspond to voids or depressions in the anatomy of a patient. Also described are method for the design and manufacture of such implants.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. application Ser. No. 15 / 505,095 filed Feb. 19, 2017, which is a U.S. National Stage Entry of PCT / NZ2015 / 050116 filed Aug. 19, 2015, which claims the benefit of priority to New Zealand Patent Application No. 628997 filed Aug. 19, 2014, each of which are incorporated in their entireties by reference.TECHNICAL FIELD[0002]This invention relates to an orthopaedic implant with regions of expandable surface.BACKGROUND ART[0003]One of the key factors in successful placement and acceptance of an orthopaedic implant is the osseointegration between a load-bearing implant and the existing patient bone.[0004]Osseointegration involves the formation of a direct interface between an implant and bone, without intervening soft tissue, resulting in a firmly positioned implant that is unlikely to cause any pain or problem to the patient.[0005]In order for effective osseointegration to occur, the outer surface of the...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): A61F2/30A61F2/36
CPCA61F2/30942A61F2/36A61F2002/30579A61F2002/30909A61F2002/30736A61F2002/30019A61F2240/002
InventorMARTIN, MADELEINE BESSCALDER, JOHN ARTHUR
OwnerOSSIS LTD