News Column

Patent Issued for Implantable Wrist Joint Assembly with Spherical Inter-Support

September 12, 2014

By a News Reporter-Staff News Editor at Health & Medicine Week -- From Alexandria, Virginia, NewsRx journalists report that a patent by the inventors Linares, Miguel A. (Bloomfield Hills, MI); Linares, Jr., Miguel A. (Bloomfield Hills, MI), filed on September 28, 2012, was published online on August 26, 2014 (see also Linares Medical Devices, LLC).

The patent's assignee for patent number 8814945 is Linares Medical Devices, LLC (Auburn Hills, MI).

News editors obtained the following quote from the background information supplied by the inventors: "The prior art is documented with various examples of wrist prostheses, one example of which is set forth in Ball et al. (US 2003/0187511 and US 2006/0030946) and which includes first, second and third components that in one form are radial, metacarpal and bearing components. A further example of a wrist prosthesis is depicted in U.S. Pat. No. 5,458,646, to Giachino, which discloses a distal and proximal supports associated with the radius and ulna bones. An intermediate component is depicted by a receptacle portion distally defining a concave bearing surface, such as which is supported by an ellipsoidal convex bearing surface having a generally part-circular cross-section associated with a proximal side of the distal part."

As a supplement to the background information on this patent, NewsRx correspondents also obtained the inventors' summary information for this patent: "The present invention discloses a multi-component wrist joint assembly incorporated into reconditioned end surfaces established between an upper radius bone and at least opposing lower scaphoid and lunate bones. The assembly includes a first component anchored into the upper radius reconditioned end surface and exhibiting a first exposed support surface. A second component is anchored into the lower scaphoid and lunate reconditioned end surfaces and exhibiting a second exposed support surface. An intermediate component is supported in at least one of eccentric or rotational fashion between the first and second anchored components.

"Additional features include the intermediate component exhibiting a spherical shaped component. Each of the anchored components may further exhibit a concave surface for supporting the intermediate component, with each of the first, second and intermediate components being constructed of any of metal, plastic, polymer (including rubberized) or composite materials.

"The spherical shaped component may also include a multi-layer composition with a softer outer layer and at least one harder interior layer. This can further include first and second inner layers of the spherical component establishing an eccentric rotational interface therebetween.

"In a further variant, a plurality of surface projecting bearings are mounted within an innermost spherical shaped portion of the spherical component for facilitating the eccentric rotational interface. In a further variant, a grid pattern of lubricating grooves can be defined in a surface of an innermost spherical shaped portion of the spherical component for facilitating the eccentric rotational interface."

For additional information on this patent, see: Linares, Miguel A.; Linares, Jr., Miguel A.. Implantable Wrist Joint Assembly with Spherical Inter-Support. U.S. Patent Number 8814945, filed September 28, 2012, and published online on August 26, 2014. Patent URL:

Keywords for this news article include: Bone Research, Linares Medical Devices, Linares Medical Devices LLC.

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Source: Health & Medicine Week

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