Patterned Microtexture for Improved Durability of Orthopedic Knee Implants

Award Information
Agency:
Department of Health and Human Services
Branch
n/a
Amount:
$53,420.00
Award Year:
2012
Program:
STTR
Phase:
Phase I
Contract:
1R41AR064095-01
Award Id:
n/a
Agency Tracking Number:
R41AR064095
Solicitation Year:
2012
Solicitation Topic Code:
NIAMS
Solicitation Number:
PA12-089
Small Business Information
MOUND LASER AND PHOTONICS CENTER, INC. (Currently Mound Laser & Photonics Center, Inc.)
P.O. Box 223, Miamisburg, OH, -
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
927253195
Principal Investigator:
RONALD JACOBSEN
(937) 865-4046
ronjacobsen@mlpc.com
Business Contact:
RONALD JACOBSEN
(937) 865-4046
ronjacobsen@mlpc.com
Research Institution:
UNIVERSITY OF UTAH

UNIVERSITY OF UTAH
75 South 2000 East Room 111
SALT LAKE CITY, UT, 84112-
() -
Nonprofit college or university
Abstract
DESCRIPTION (provided by applicant): Each year in the US, approximately 600,000 total knee replacement (TKR) surgeries are performed at a total annual cost of 15B and nearly 4.5M Americans are currently living with a TKR implant. The survival rate of TKRdevices declines dramatically after ten years of use due primarily to mechanical wear. The objective of this STTR project is radically improve the durability of TKRs by modifying them to enhance the performance of the lubricating synovial fluid. The current paradigm for combating implant wear is to minimize friction by employing ultra-smooth sliding surfaces. In contrast, our approach will add to the implant's femoral component a surface texture that is designed to create hydrodynamic lubrication at low sliding velocities. Newly available ultra short pulse lasers will b used to create the designed texture on a CoCr femoral component in the form of arrays of micron-scale dimples. The lasers will achieve this in a manner that does not adversely affect the surface roughness between dimples, or the intrinsically excellent wear properties of the material. This Phase 1 project will verify the hypothesis that a surface so textured can generate full fluid lubrication at realistic knee joint sliding velocities to reduce friction and wear that eventually lead to implant failure. This research has the potential to shift current paradigms about implant bearing surfaces. This knowledge could produce a new generation of radically different, longer-lasting orthopedic implants. The method laser texturing method for modifying the implants is an established industrial process that is affordable and will allow near term transition of the lubrication enhancement technology for the benefit of patients and overall savings to the health care system. PUBLIC HEALTH RELEVANCE: Nearly 4.5 million Americans are currently benefitting from total knee replacement (TKR) implants, and new surgeries are being performed a rate of 600,000 (and 15B) per year and accelerating. The statistical failure rate of TKR implants increases dramatically after 10 years of service. This project seeks to greatly reduce wear and extend life of TKRs to avoid patient pain and disability, and reduce health care costs and risks associated with complicationsand revision surgery. 1

* information listed above is at the time of submission.

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