Carpometacarpal (CMC) joint arthoplasty implants and related jigs, medical kits and methods

Inactive Publication Date: 2008-10-30
PIPER MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]Embodiments of the present invention can replace both the base of the first metacarpal and the opposing articular surface of the trapezium, resulting in a total thumb CMC arthroplasty (TCMA).

Problems solved by technology

It typically presents as a symptomatic problem in the sixth decade of life and its incidence increases thereafter.
Unfortunately, this distinct anatomical advantage can result in arthritis of the CMC joint of the thumb.
It is believed that gaming and cell phone text-messaging and the like may also lead to basilar thumb arthritis, with a resulting increase in incidence as well as a potential earlier onset that has been conventional.
Fortunately, they can reduce the arthritic pain, but problems have arisen.
Potential problems include implant loosening, implant breakage, implant dislocation, adverse tissue reaction to the implant (particularly silicone), failure of pain relief, loss of strength, and implant subsidence (sinking in or erosion of the residual trapezium, as in 1st metacarpal implants).

Method used

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  • Carpometacarpal (CMC) joint arthoplasty implants and related jigs, medical kits and methods
  • Carpometacarpal (CMC) joint arthoplasty implants and related jigs, medical kits and methods
  • Carpometacarpal (CMC) joint arthoplasty implants and related jigs, medical kits and methods

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Embodiment Construction

[0010]In some embodiments, thumb CMC joint implants include a trapezium implant defining an articulating surface and a cooperating first metacarpal implant with a base portion of the first metacarpal defining an articulating surface. The first metacarpal base articulating-surface is configured to articulate against the trapezium implant articulating surface.

[0011]Embodiments of the present invention can replace both the base of the first metacarpal and the opposing articular surface of the trapezium, resulting in a total thumb CMC arthroplasty (TCMA).

[0012]In some embodiments, the trapezium implant includes at least one downwardly extending anchoring member. The at least one anchoring member can include a plurality of transversely spaced apart keels extending at least a major portion of a length or width dimension of the trapezium implant.

[0013]In some embodiments, the trapezium implant can include a projecting portion that forms the articular surface. The first metacarpal base port...

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Abstract

Thumb carpometacarpal (CMC) joint implants include a trapezium implant defining an articulating surface and a cooperating first metacarpal implant with a base portion of the first metacarpal defining an articulating surface. The first metacarpal base articulating-surface is configured to articulate against the trapezium implant articulating surface.

Description

RELATED APPLICATIONS[0001]This application claims the benefit of priority of U.S. Provisional Application Ser. No. 60 / 914,449 filed Apr. 27, 2007, the contents of which are hereby incorporated by reference as if recited in full herein.FIELD OF THE INVENTION[0002]This invention relates to implants suitable for use in treating pain and / or injury of the carpometacarpal joint.BACKGROUND OF THE INVENTION[0003]Basilar thumb arthritis (arthritis at the base of the thumb) of the carpo-metacarpal (CMC) joint is thought to be the most common arthritis of the homosapien. It typically presents as a symptomatic problem in the sixth decade of life and its incidence increases thereafter. It is a result of the rather recent phylogenetic appearance of a highly mobile, strong thumb ray. The thumb acts as the pivotal and guiding member of the defining anatomical features of the human, the prehensile hand. The brain's cortical representation area of the thumb is huge. The thumb allows for a panoply of ...

Claims

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Application Information

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IPC IPC(8): A61F2/42
CPCA61B17/15A61B17/1686A61F2/4241A61F2002/4256A61B2017/1782A61B17/1782A61F2/4606A61F2/4684A61F2002/30113A61F2002/30156A61F2002/30161A61F2002/30164A61F2002/30265A61F2002/30301A61F2002/30387A61F2002/30403A61F2002/30431A61F2002/30604A61F2002/30616A61F2002/30672A61F2002/4258A61F2002/4635
InventorWARBURTON, MARK J.
OwnerPIPER MEDICAL