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Osteoarthritis of the elbow occurs when the cartilage surface of the elbow is damaged or becomes worn. This can happen because of a previous injury such as elbow dislocation or fracture. It may also be the result of degeneration of the joint cartilage from age. Osteoarthritis usually affects the weight-bearing joints, such as the hip and knee. The elbow is one of the least affected joints because of its well matched joint surfaces and strong stabilizing ligaments. As a result, the elbow joint can tolerate large forces across it without becoming unstable.
DiagnosisMost patients who are diagnosed with elbow osteoarthritis have a history of injury to the elbow, such as a fracture that involved the surface of the joint, or an elbow dislocation. The risk for elbow arthritis increases if:
Injury to the ligaments resulting in an unstable elbow can also lead to osteoarthritis, even if the elbow surface is not damaged, because the normal forces across the elbow are altered, causing the joint to wear out more rapidly.
In some patients, no single injury to the elbow occurs. Work or outside activities can lead to osteoarthritis of the elbow if the patient places more demands on the joint than it can bear. For example, professional baseball pitchers place unusually high demands on their throwing elbows, which can lead to failure of the stabilizing ligaments. When this occurs, surgical reconstruction is usually needed. High-shear forces placed across the joint can lead to cartilage breakdown over a period of years.
The best way to prevent elbow arthritis is to avoid injury to the joint. When injury does occur, it is important to recognize it right away and get treatment. Individuals involved in heavy work or sports activities should maintain muscular strength around the elbow. Proper conditioning and technique should always be used.
SymptomsThe most common symptoms of elbow arthritis are:
Both of these symptoms may not occur at the same time. Patients usually report a "grating" or "locking" sensation in the elbow. The "grating" is due to loss of the normal smooth joint surface. This is caused by cartilage damage or wear. The "locking" is caused by loose pieces of cartilage or bone that dislodge from the joint and become trapped between the moving joint surfaces, blocking motion.
Joint swelling may also occur, but this does not usually happen at first. Swelling occurs later, as the disease progresses.
In the later stages of osteoarthritis of the elbow, patients may notice numbness in their ring finger and small finger. This can be caused by elbow swelling or limited range of motion in the joint. The "funny bone" (ulnar nerve) is located in a tight tunnel behind the inner (medial) side of the elbow. Swelling in the elbow joint can put increased pressure on the nerve, causing tingling. If the elbow cannot be moved through its normal range of motion, it may stiffen into a position where it is bent (flexion). This can also cause pressure around the nerve to increase.
TreatmentTreatment options depend on the stage of the disease, prior history, what the patient desires, overall medical condition, and the results of diagnostic X-rays.
For the early stages of osteoarthritis of the elbow, the most common treatment is nonsurgical. This includes oral medications to reduce or alleviate pain, physical therapy, and activity modification.
Corticosteroid injections are sometimes used to treat osteoarthritis symptoms. Steroid medication has typically been used with good results. Although the effects of injections are temporary, they can provide significant pain relief until symptoms progress enough to need additional treatment.
An alternative to steroids has been the injection of hyaluronic acid in various forms, called viscosupplementation. Viscosupplementation involves injecting substances into the joint to improve the quality of the joint fluid. Complete coverage of this techniuqe can be found in the article titled "Viscosupplementation Treatment for Arthritis."
Arthroscopy has been shown to provide symptom improvement at least in the short term. It involves removing any loose bodies or inflammatory/degenerative tissue in the joint. It also attempts to smooth out irregular surfaces. Multiple small incisions are used to perform the surgery. It can be done as an outpatient procedure, and recovery is reasonably rapid.
If the joint surface has worn away completely, it is unlikely that anything other than a joint replacement would bring about relief. There are several different types of elbow joint replacement available.
In appropriately selected patients, the improvement in pain and function can be dramatic. With an experienced surgeon, the results for elbow joint replacement are typically as good as those for hip replacement and knee replacement.
For patients who are too young or too active to have prosthetic joint replacement, there are other reasonably good surgical options. If loss of motion is the primary symptom, the surgeon can release the contracture and smooth out the joint surface. At times, a new surface made from the patient's own body tissues can be made. These procedures can provide years of symptom improvement.
Research on the HorizonRecently, joint supplementation has been used as an alternative to traditional oral and injectable medications. For oral medication, this involves a glucosamine/chondroitin supplement. These "nutraceuticals" attempt to give the body more of the basic elements that make up cartilage. Then the body may attempt to maintain or "build back" cartilage. There have been few well-controlled research studies on the effects of glucosamine/chondroitin supplements, and those that have been conducted have not included patients with osteoarthritis of the elbow. Although the short- and long-term effects are not yet known, anecdotal reports have been favorable. (Note: The U.S. Food and Drug Administration does not test dietary supplements. These compounds may cause negative interactions with other medications or excessive bleeding during surgery. Always consult your doctor before taking dietary supplements.)
In patients with loss or damage to areas of the elbow joint, a cartilage/bone graft can be considered. The goal of this procedure is to return the joint to its prior smooth appearance and form in an attempt to prevent further deterioration. As the understanding of cartilage growth and regeneration improves, this may allow replacement of larger areas of joint damage or degeneration.
Newer elbow replacements have also been designed with the goals of greater longevity and easier insertion compared with prior designs.
Source: http://orthoinfo.aaos.org/topic.cfm?topic=A00421
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X-ray showing an elbow with early degenerative changes.
A doctor can usually diagnose osteoarthritis of the elbow based on symptoms and standard X-rays. X-rays show the arthritic changes. Advanced diagnostic imaging, such as CT (computed tomography) or MRI (magnetic resonance imaging), is typically not needed to diagnose osteoarthritis of the elbow. Elbow osteoarthritis that occurs without previous injury is more common in men than women. Onset typically occurs in patients 50 years of age or older, but some patients can have symptoms earlier.
X-ray of a patient who underwent elbow joint replacement.
When nonsurgical interventions are not enough to control symptoms, surgery may be needed. By the time arthritis can be seen on X-rays, there has been significant wear or damage to the joint surfaces. If the wear or damage is limited, arthroscopy can offer a minimally invasive surgical treatment. It may be an option for patients with earlier stages of arthritis.
