Joint replacement is an effective surgical intervention for some joint diseases.  Implant loosening is a disabling condition that can affect patients after joint replacement surgery.  Unfortunately, subtle progression of tissue deterioration around the implant remains a major challenge, because signs and symptoms may not be clinically apparent until the late stages of failure.

The Reference Implant enables monitoring of joint implant loosening over time using radiographs. The Reference Implant can be inserted during the initial arthroplasty surgery, and thus would require no additional surgical procedures. The Reference Implant will remain stationary in the bone when inserted in an area where there is low immunological response and low mechanical loading.  As the joint implant rotates or translates, the x-ray images of the joint implant and the Reference Implant will show altered geometries, which can be measured using image analysis software.  Early detection of joint implant loosening could prevent the need for major revision surgeries. Instead, minor, less invasive approaches to joint implant repair could be utilized.

One embodiment of such Reference Implant is a Telescoping Screw System, which is intended to facilitate the attachment of computer assisted navigation probes.

Competitive Advantages

Utilizes standard radiographs instead of electronic sensors

Performed during initial joint replacement surgery

Earlier detection of implant loosening

Prevention of major revision surgeries

Lower medical costs

Opportunity

The global orthopedic joint replacement market is expected to increase from $19 billion in 2018 26.9 to billion by 2026, at a compound annual growth rate of 5.1%.  Rowan University is looking for a partner for further development and commercialization of this technology through a license. The inventor is available to collaborate with interested companies.