Arthrosurface® Revolutionizes Total Shoulder Arthroplasty

February 21, 2019

In 2001, Steve Ek, the current CEO of Arthrosurface®, began experimenting with the idea that a small implant could replace only the localized, damaged area of the joint, rather than the entire joint. Unlike traditional total joint replacements, he imagined that these implants would be less invasive, anatomically correct, performed on an outpatient basis, and allow patients to resume full activity level following recovery. The different Arthrosurface product lines each contain multiple size options that are brought into the operating room where the surgeon is able to map out the correct curvature and implant size, resulting in a custom fit to the patient.stemless shoulder implant sizes

There are many benefits of less invasive, anatomically correct joint replacements like ours. Shorter hospital stays, reduced recovery time, improved range of motion, reduced pain, and no activity restrictions are just a few. When you undergo a traditional total joint replacement, the anatomy of the joint is completely altered. Your body must learn how to work in a different way because of this. However, the innovative inlay designs of the Arthrosurface implant systems preserve and restore the original anatomy of the joint, thus resulting in reduced recovery time and no activity restrictions. The same cannot be said for most traditional total joint replacements. With the success of the original Knee HemiCAP in the early 2000s, Steve Ek began developing similar concepts for the shoulder, toe, and wrist.

stemless shoulder implant patient

In 2011, ten years and many product lines later, Arthrosurface launched the OVO® Primary Stemless Shoulder System with Inlay Glenoid. This system utilizes the same ideas of restoring original joint anatomy; however, it also tackles additional problems in the surgical shoulder world. Contrary to popular belief, the humeral head is not a perfect sphere1, it is a unique shape. The correct term for the shape of the humeral head is an ovoid, which resembles the shape of an egg. This is a very small, but important distinction. Why? Because if we are trying to keep the native anatomy of the joint intact, a spherical humeral head implant would not be ideal due to the fact that it will alter the biomechanics of the joint. However, replacing it with the only ovoid shaped implant on the market (Arthrosurface’s OVO), with our inlay glenoid, helps avoid overstuffing of the joint, improves range of motion, and reduces pain. Even better, limits to activity levels are essentially non-existent.

Another problem that the OVO System tackles are complications that occur with many stemmed implants. In a stemmed shoulder replacement, a surgeon inserts a stemmed device into the diaphysis of the bone. The OVO System uses a taper post, as opposed to a stemmed device. The taper post secures into dense subchondral bone, which provides strong fixation. This stemless implant system preserves more bone stock and lowers the risk of bone fractures both during and after surgery. A stemless shoulder replacement also significantly reduces operating time, compared to traditional stemmed implants. The ability to remove and revise if necessary is also an option, with no bridges burned.

An additional benefit of the OVO System is the Inlay Glenoid Component, as opposed to an Onlay Glenoid implant. The Arthrosurface Inlay Glenoid implant significantly reduces glenoid loosening due to the elimination of the “Rocking Horse” effect. The change in location of pressure during eccentric loading to a more central area provides better stability to the inlay implant because the pressure is diverted to the native tissue on the glenoid edge, successfully eliminating the Rocking Horse effect. In an independent study, over the course of a 4000-cycle test, there were no detected instances of loosening in the inlay glenoid component. However, the Onlay Glenoid component showed loosening far before the 4000 cycles. The gross loosening for this study occurred at a mean of 1126 cycles2. The table below summarizes the results.
stemless shoulder implant inlay glenoidIn April 2018, the OVOMotion™ Shoulder Arthroplasty System with Inlay Glenoid was cleared by the FDA and first implanted in August 2018. The benefits and results of the implant are the same as the OVO System, however, we slightly altered the procedure. To the patient, everything is the same as the OVO. However, surgeons typically find access to the glenoid to be one of the more difficult aspects of a shoulder replacement. The OVOMotion System provides them with an approach that allows them to easily access and visualize the inferior and posterior glenoid border. Michael Gombosh, MD, from South Florida International Orthopaedics commented, “With the new system, the additional 12.5mm of bone removed from the humeral head has truly improved the technical portion of the procedure. This allows for easier visual and manual access of the glenoid. These steps can be the most challenging portion of the operation, and frequently the most time consuming. With improved visualization, you are able to obtain a more accurate assessment of the morphology and wear pattern within the glenoid, but also establish improved access for glenoid preparation and release of the posterior capsule.”


35 responses to “Arthrosurface® Revolutionizes Total Shoulder Arthroplasty”

  1. Joe barranco says:

    Is the total replacement available in Australia yet?

  2. I am a pharma medical rep
    I also need two knee replacements and possibly a shoulder replacement

    But U am very active professionally and also in my personal lifestyle

    Ist do you have reps in Canada
    Second are there any restrictions on who can have this product

    • arthrosurface says:

      Hi Michael, we just sent you an email!

    • Glenn Waldron says:

      I am 69 and need TSR in right. I am extremely active and very interested in your system. Are there disqualifiers that would eliminate one from using this method? Such as low grade osteopenia, for example. Have been prescribed prednisone, short courses, throughout different ailments resulting in osteopenia diagnosis. Doing everything I can to reverse.
      Would I be eligible?

  3. Ed Capps says:

    How can one obtain a list of the surgeons most experienced with the latest innovations in the system?

    Thank you

  4. John Darcy says:

    I would also like to obtain a list of of surgeons that have the most experience with the hemicap and Ovo procedures… thanks

  5. Michael Sweet says:

    I received a hemi cap shoulder 10 years ago and now having pain and limited motion. Saw a dr today at UofM who said I now have a “goats beard” bone growth from the metal on bone from the implant. I was told the only option was to wait as long as possible (I’m 57) and convert to a traditional shoulder with major lifestyle impacts. They did not mention the ovomotion as an option but did say they do not use the arthro surface device as they see the issue i have often. I’m not sure what to do..

    • arthrosurface says:

      Hi Michael, We sent you an email. Our OVOMotion system includes a reamer that should remove the goats beard aka osteophyte for you.

  6. jim says:

    Please send me a list of Dr’s in the Midwest that do this procedure…specifically…Iowa-Nebraska- thank you

  7. Lance Vaughan says:

    Please send me someone that does this in Mexico or india

  8. mark says:

    looking at a recent x-ray 9/3/19 ball is wearing into the socket. Can my shoulder be repaired with your system?

  9. Sandy Henry says:

    Could you send the list of people that do these procedures in ga.

  10. Lois Lambert says:

    Are there any surgeons in Birmingham AL that use the OVO system? I am particularly interested in the Inlay glenoid component as I have come across only two INLAY options for the glenoid, which is surprising given that it is more often the weak point of failure.

    I’m scheduled to have a TSA next week

  11. Steve Cerveny says:

    Any Surgeons in Santa Barbara or San Luis Obispo, Ca.

  12. Joseph m says:

    I’m 58 y/o active male who needs a left total replacement I’m very interested in this type of surgery for me

  13. Scott says:

    Do you have any surgeons in central Indiana that use your products?

  14. Randy Breyer says:

    My wife is a paraplegic and her shoulders are giving here constant pain. we have tried Cortisone and rehab but nothing works to alive it. She is 63 and we have appointment tomorrow with her ortho surgeon. She is afaid of a full shoulder replacement and the rehab scares me also as I am her caregiver. This procedure looks promising to me. We are located in Minnesota close to the Twin Cities.

  15. Debbie says:

    I need a list of drs who perform the ARTHOSURFACE shoulder implant, PLEASE.
    I live in the longwood fl area.

  16. David Klein says:

    Ive been told I need a total shoulder replacement and I’m only 30! Apparently there is some wear to the posterior region of my glenoid capsule. Does this disqualify me from the surgery?

  17. patricia Nettleton says:

    Please send a list of places this surgery is available thank you

  18. I am a 56 year old active male. My doctor is discussing shoulder replacement due to arthritis due to an old injury. I want to eliminate pain and improve range of motion but I am concerned about limitations
    My doctor said my shoulder is beyond hemicap

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