Not Accepting Cases

Reverse Shoulder Replacement Complications

Reverse shoulder replacement has gained popularity partly because it can be a solution for severe injury or deterioration of patients’ shoulder joints. But shoulder implants have suffered higher complication rates than other joint implants.


Editors carefully fact-check all Drugwatch content for accuracy and quality.

Drugwatch has a stringent fact-checking process. It starts with our strict sourcing guidelines.

We only gather information from credible sources. This includes peer-reviewed medical journals, reputable media outlets, government reports, court records and interviews with qualified experts.

Related Pages

Reverse total shoulder replacement or arthroplasty (rTSA) gets its name from the way it “reverses the anatomy” of the human shoulder. A natural shoulder joint has a “ball” at the top of the upper arm bone and a “socket” in the shoulder. Reverse shoulder implants place an artificial ball on the shoulder and an artificial socket on the upper arm.

Reverse shoulder replacement remains a relatively new procedure and reports of complications have decreased as surgical techniques and implant designs have improved. But complication rates have been higher than for other joint implants over the history of the devices.

Common Complications of Reverse Shoulder Implants

The most common complications of reverse shoulder implants include nerve damage, infection and dislocation.

The overall complication rate of rTSA may be as much as four times that of conventional shoulder replacement surgery. One study found that nearly 4 in 10 reverse shoulder implant patients younger than 65 experienced complications.

Reverse Shoulder Replacement Complications:
  • Dislocation of the ball and socket of the implant (more common with rTSA than TSA)
  • Infection which may require surgery to treat
  • Scapular notching – wearing a groove into the shoulder blade
  • Component loosening or failure
  • Bone fractures around the implant or in the shoulder blade
  • Weakness, numbness or tingling sensations
  • Nerve damage – affecting feeling or control of the arm and hand
  • Hematoma – blood clotting in tissue

Patient Age Factors into Outcome

Age can also play a difference in a patient’s chances of suffering a complication. Researchers in a 2013 study of nearly 3,000 reverse shoulder replacement patients found those younger than 60 required revision surgeries at twice the rate as patients 60 or older.

Study: Reverse Shoulder Benefits vs. Complications

In January 2018, a small study suggested reverse shoulder implants could reduce pain and increase range of motion. But researchers also found high complication rates associated with the devices. The study looked at 22 patients over 19 years. Thirteen of the patients reported one or more complications. Complications included infection, loosening and dislocation. Researchers published their findings in the Journal of Shoulder and Elbow Surgery.

Reverse Shoulder Implant Risks Detailed

Despite potential side effects, a surgeon may still recommend reverse shoulder replacement if it may improve a patient’s quality of life. Patients should be aware of the potential complications from this surgery.

Reverse Shoulder Implant Dislocation

A 2017 study of nearly 1,500 reverse shoulder replacements found 2 of every 3 dislocations happened in the first three months after surgery. Dislocations were also more frequent among people who had surgery to repair or replace an earlier implant.

Did You Know
2 out of 3 reverse shoulder dislocations happen within 3 months of receiving the implant.

A reverse shoulder implant can dislocate if a patient lifts something or puts other tension on the muscles. Dislocation can also happen if the parts of the implant are the wrong size from one another.

Doctors may be able to relocate the ball into the socket of the implant, and put the patient’s arm in a sling for a few weeks. If this does not work, or if it can’t be done, the patient may require surgery to relocate the implant.

Infection Risk After Surgery

Infection is a risk of any surgery and especially of implant surgeries. Some estimates suggest 1 in 10 people who receive a reverse shoulder implant may have to deal with infection. In most cases, it can be treated with antibiotics. If the drugs do not work, the patient will have to undergo another surgery to stop the infection.

Doctors performing surgery
If antibiotics don't work, the patient will have to undergo another surgery to stop the infection.

Surgery may involve simply cleaning the device and removing any infected tissue the doctor finds. If it is a severe case of infection, the surgeon may have to remove parts of the implant and replace them.

Loosening and Fractures

A patient’s bone health can play a part in fractures or the implant coming loose. Fractures can occur even as a surgeon places a reverse shoulder implant into a patient for the first time. Patients receiving this reverse shoulder replacements may already have weak bones that are more prone to breaking.

If the patient’s bone fails to grow around the implant’s baseplate, it may remain loose and require further surgery to correct.

In 2016, Zimmer Biomet recalled more than 3,000 reverse shoulder implants after reports of the devices fracturing. The only way to repair a fractured implant is with revision surgery. Some patients who suffered fractures filed reverse shoulder lawsuits.

Nerve Damage

Reverse shoulder implants can cause a loss of feeling or control in the arm and hand.

The implant can affect a bundle of nerves called the brachial plexus. These nerves run down the neck, through the shoulder and continue down to the hand.

Reverse shoulder implants can put pressure on this nerve bundle or push it aside from its normal location. If this happens, a patient can lose feeling or even lose partial function of the arm and hand. Scar tissue from a shoulder replacement surgery can also cause similar nerve complications.

Health Insurance May Affect Chances of Complications

Researchers at Boston University Medical Center have found that the type of insurance coverage people have – or don’t have – is associated with the risk of complications in shoulder replacement surgery.

The researchers analyzed medical records for more than 100,000 patients who had shoulder replacements – both conventional and reverse shoulder replacement implants. Their 2017 study found that people with Medicare or Medicaid coverage and those with no insurance suffered “a significantly higher rate of medical, surgical, and overall complications” compared to patients with private insurance.

Shoulder Replacement Complications Based on Health Insurance
2 in 10 patients had complications
Medicaid or No Insurance
Almost 2 in 10 patients had complications
Private Insurance
1 in 10 patients had complications

Those with Medicare, Medicaid or no insurance at all were twice as likely to suffer complications as those who had private insurance.

The researchers said the higher rates may be associated with income or education levels of the patients. They also found that people with private insurance tended to have shoulder replacement surgery in high volume hospitals where doctors would have done more surgeries and be more familiar with them. Patients on Medicaid and or who were uninsured tended to have their surgeries at hospitals and by surgeons that had performed fewer shoulder replacements.

Please seek the advice of a medical professional before making health care decisions.

Related Pages

Did you find Drugwatch helpful?

11 Cited Research Articles

  1. Farshad, M. and Gerber, C. (2010, September 25). Reverse Total Shoulder Arthroplasty – From the Most to the Least Common Complication. Retrieved from:
  2. Cheung, E. (2011, July). Complications in Reverse Total Shoulder Arthroplasty. Retrieved from:
  3. Li, X, et al. (2017, February 10). Insurance Status Affects Postoperative Morbidity and Complication Rate after Shoulder Arthroplasty. Retrieved from:
  4. Science Daily. (2017, February 13). Insurance Status Impacts Complication Rates after Shoulder Replacement Surgery. Retrieved from:
  5. Wright Medical Technology. (2017). 2016 Annual Report. Retrieved from:
  6. Sershon, R.A. (2014, March). Clinical Outcomes of Reverse Total Shoulder Arthroplasty in Patients Aged Younger than 60 Years. Retrieved from:
  7. Chalmers, B.P. (2017, February 1). Treatment and Outcomes of Reverse Shoulder Arthroplasty Dislocations. Retrieved from:
  8. American Academy of Orthopaedic Surgeons. (2017, March). Reverse Total Shoulder Replacement. Retrieved from:
  9. Ek, E.T., Neukom, L., Catanzaro, S., and Gerber, C. (2013, February 4). Reverse Total Shoulder Arthroplasty for Massive Irreparable Rotator Cuff Tears in Patients Younger than 65 Years Old: Results After Five to Fifteen Years. Retrieved from:
  10. Gerber, C., et al. (2018, January 3). Longitudinal Observational Study of Reverse Total Shoulder Arthroplasty for Irreparable Rotator Duff Dysfunction: Results After 15 Years. Journal of Shoulder and Elbow Surgery. Retrieved from
  11. May, B. (2018, February 1). Reverse Total Shoulder Arthroplasty: Long-Term Clinical, Subjective Outcomes. Clinical Pain Advisor. Retrieved from
View All Sources
Who Am I Calling?

Calling this number connects you with Wilson and Peterson, LLP or one of its trusted legal partners. A law firm representative will review your case for free.

Wilson and Peterson, LLP funds Drugwatch because it supports the organization’s mission to keep people safe from dangerous drugs and medical devices.

(888) 645-1617

To contact Drugwatch Managing Editor Kevin Connolly, call (855) 839-9780.