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Maybe you don’t need that knee surgery after all

By
July 29, 2016 at 8:02 a.m. EDT
A male therapist or doctor, starting to perfom the anterior drawer test. A test in 90° of knee flexion for the objectivation of stability of anterior cruciate ligament. In this position stability of the posterior capsle can hide a rupture of the ACL. (Jan-Otto/Getty Images/iStockphoto)

People with a torn meniscus — the C-shape cartilage that acts as a cushion between bones in the knee — generally choose between arthroscopic surgery and physical therapy to ease the pain and regain use of their knee.

Is one option better than the other?

This study

The study included 140 adults (average age, 50) who had knee pain from a meniscal tear thought to be degenerative rather than the result of an accident or blow to the knee. Nearly all had no evidence of osteoarthritis. The participants were randomly assigned to have either arthroscopic surgery followed by daily exercises at home to reduce swelling and regain range of motion or to work with a physical therapist on neuromuscular and strength exercises two to three times a week for 12 weeks.

Periodic testing for the next two years showed improvement in both groups. Muscle strength had improved more, on average, in the physical therapy group at the three-month checkup, but at the final two-year checkup, there was essentially no difference between the surgery and therapy groups, including in pain, ability to function in sports and recreation activities, and quality of life. The researchers noted that 19 percent of the therapy group opted to have surgery at some point but had achieved “no additional benefit” by the end of the study

Who may be affected

People with a degenerative meniscal tear, which can cause pain, swelling, stiffness and limited mobility. Rest, along with ice and pain medication, sometimes gives the knee time to heal on its own. The goal of physical therapy is to strengthen muscles needed to stabilize and support the knee joint, whereas surgery aims to repair the meniscal tear.

Caveats

Some data on treatment effectiveness came from the participants’ responses on questionnaires. Whether people who have a torn meniscus from knee trauma would experience the same results was not tested.

Find this study

Online July 20 in the BMJ (thebmj.com; under "More articles," click "Research paper")

Learn more

Information on meniscus tears can be found at orthoinfo.aaos.org (click on the knee in the diagram) and at mayoclinic.org.

The research described in Quick Study comes from credible, peer-reviewed journals.