Osteochondritis dissecans, also called OCD, is the most common cause of a loose body or fragment in the knee and is usually found in young males between the ages of ten and twenty. While this word sounds like a mouth full, breaking down its Latin derivation to its simplest terms makes it understandable: “osteo” means bone, “chondro” means cartilage, “itis” means inflammation, and “dissecans” means dissect or separate. In OCD, a flap of cartilage with a thin layer of bone separates from the end of the bone. As the flap floats loosely in the joint, it becomes inflamed, painful and disrupts the normal function of the joint.
Typically, OCD is found in the knee joint of active young men who participate in sports which involve jumping or full contact. Although less common, it is also found in other joints such as the elbow.
Often, the exact cause of OCD is unknown. For a variety of reasons, blood flow to the small segment at the end of the bone lessens and the weak tissue breaks away and becomes a source of pain in the joint. Long term, OCD can increase the risk of osteoarthritis in the involved joint.
To properly diagnose OCD a physician will consider onset, related activities, symptoms, medical history, and examine the joint involved for pain, tenderness, loss of strength and limited range of motion. Often, a referral to a specialist such as an orthopedic surgeon for further examination is necessary. Special tests specifically detect a defect in the bone or cartilage of the joint such as:
Radiograph (X-ray) may be performed to assess the bones.
Magnetic Resonance Imaging (MRI) may be performed to assess bones and other soft tissues such as cartilage, ligaments, muscles and tendons.
The primary goal of treatment for OCD is to relieve pain, control swelling, and restore the complete function (strength and range of motion) of the joint. The age of the patient and severity of the injury determine the treatment methods. For example, medications assist with pain and inflammation reduction.
Young patients who are still growing have a good chance of healing with conservative treatment. Rest and physical therapy are the conservative treatments of choice. Rest entails avoiding any activity that compresses the joint such as jumping, running, twisting, squatting, etc. In some cases, using a splint, brace and crutches to protect the joint and eliminate full weight bearing, may be necessary for a few weeks. Physical therapy, either as a conservative or post operative treatment, involves restoring the range of motion with stretching exercises and improving the strength and stability of the joint through strengthening exercises. Modalities for pain and swelling such as heat, cold, electrical stimulation, ultrasound, compression devices assist with treatment depending on the age of the patient and severity of the problem.
Conservative treatment can often require 3 to 6 months to be effective. However, if it fails, arthroscopic surgery stimulates healing or reattaches the loose fragment of cartilage and bone. In some cases if the defect is small, surgery involves filling in the defect with small bundles of cartilage. In other cases, the fragment is reattached directly to the defect using a small screw or bioabsorbable device. More recently, surgeons are using the bone marrow of the patient to repair the deficit by stimulating the growth of new tissue (bone marrow stimulation).
In other cases, a plug of healthy tissue from the non-weight bearing surface of a patient's knee relocated to the defect to stimulate healing (osteochondral autograft transplantation OATS). While there are many surgical options for OCD, an orthopedic surgeon will help the patient decide the most appropriate procedure based on age, size of defect, and other factors.
While prevention is not always possible, some measures can be taken to limit risk. For example, if a child playing sports has a father and older brother who had OCD, then it would be wise to consider the following: Avoid or make modifications for sports requiring constant jumping. Cross-train for a sport to avoid daily trauma (run one day and bike the next). Also, do not play the sport all year round (basketball in the fall/winter and baseball in the spring/summer). Seek the advice from an orthopedic or sports physical therapist to learn proper strength and conditioning techniques. Learn proper biomechanics of lifting, throwing, squatting, running, jumping and landing.
Sources: Mayo Clinic
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This article is not intended as a substitute for medical treatment. If you have questions related to your medical condition, please contact your family physician. For further inquires related to this topic email: drpmackarey@msn.com
Paul J. Mackarey PT, DHSc, OCS is a Doctor in Health Sciences specializing in orthopedic and sports physical therapy in Scranton and Clarks Summit. Dr. Mackarey is in private practice and is an associate professor of clinical medicine at Geisinger Commonwealth School of Medicine. For all of Dr. Mackarey's articles, visit our exercise forum!
Patients often tell me that they would like to exercise but hesitate due to their knee or hip pain. They want to know what type of exercise is best for those suffering from osteoarthritis (OA). Osteoarthritis is also known as degenerative arthritis. It is the most common form of arthritis in the knee. It is usually a gradual, slow and progressive process of “wear and tear” to the cartilage in the joint which eventually wears down to the bony joint surface. It is most often found in middle-aged and older people and in weight bearing joints such as the hip, knee and ankle. It causes gradual onset of pain, swelling and stiffness in the involved joint, especially after increased activity and weakness with loss of function due to disuse.
However, OA is not an excuse to avoid exercise but it is important to be smart about it. Regular exercise is essential to maintain a normal lifestyle for those with OA. However, if you do the wrong exercise, use poor technique, or are too aggressive, you could flare-up your joints and do more harm than good.
When performed correctly, exercise for those with OA has many benefits:
Pain Control
Exercise controls OA pain by releasing natural pain control chemicals in the body called endorphins. It also controls pain by assisting in weight loss and improving range of motion.
Weight Control
We all know how well exercise burns calories and that increased body weight creates increase stress on the joints.
Prevention of Joint Stiffness
Exercise will help maintain joint range of motion. A stiff joint is a painful joint.
Prevention of Muscle Weakness
Exercise will help maintain muscle strength. Weak muscles will allow or increase in joint wear and tear.
Maintain Lifestyle
If a joint is stiff and weak, then they become painful which negatively impacts your lifestyle. Exercise can prevent this problem.
Start Slowly
Wean into exercise because if you advance too quickly, you will flare up the joint and have increased pain. For example, walk for 5-10 minutes the first session. If you do not have pain, add 1-2 minutes each session.
Lose Weight
Every pound lost equates to less stress on your joints. For example, a loss of 5 pounds of body weight translates to 20-30 pounds of stress through the knee, according to David Borenstein, MD, President of the American College of Rheumatology. Also, body weight has a direct impact on daily activities. For example, walking upstairs creates stress through the knee equal to 4 times body weight and seven times body weight going downstairs. Therefore, less body weight equals less stress.
Low Impact Workouts
Low impact exercise creates less stress on the joints while strengthening leg muscles and those who those who maintain leg muscle strength have less stress on their joints. It is even important not to load your arms with heavy objects when walking or using stairs to limit joint stress.
Some examples of low-impact exercises are: walking, swimming, elliptical trainer, and biking. Strength training is also low-impact and should be performed with low weight and high repetitions. Water therapy is great for those with OA, especially in a heated pool. It is a great low-impact exercise with less gravity and stress on the joints. Walk, swim and do mild resistance exercises in the water. Use a snorkel and mask for swimming to limit excessive neck turning and back extension.
Walking is a great form of exercise; however, walking softly is important for those with OA. Wear good running shoes and orthotics if necessary. Discuss this with your physical therapist or podiatrist. When possible, use soft surfaces like cinder, mulch or rubber. Avoid grass and soft stand due to instability and torsion that may irritate your joints.
Warm-Up
Warming up your body is critical to prevent injury to the muscles and tendons. This can be done by marching in place or using aerobic equipment such as a bike for 5 to 10 minutes before exercise. Always perform the warm-up activity at ½ your normal pace.
Balance & Relaxation Techniques
Tai Chi and ballroom dancing are two good examples of activities which promote balance and relaxation. Studies showed that those with OA who participated in Tia Chi two times a week for eight weeks reported less pain, increased range of motion and improved daily activities and function. They also noted less low back pain and better sleeping.
Proper Clothing
Stay warm in winter and consider wearing compression shorts. Be cool in the summer months with DrytechR type material.
Pre/Post Exercise First Aid
If you are sore for longer than 12 to 24 hours after exercise, then you overdid it and must make adjustments next time. Otherwise, use hot packs, bath or shower before you exercise to loosen up and apply ice to your joints after exercise, especially if they are sore.
Post Exercise Stretch
Gentle, active range of motion stretches after exercise is important to maintain mobility. Do not bounce or cause pain. For example: Low Back – knees to chest; Arms – row –the – boat, arms behind head, arms behind back; Legs – wall lean calf stretch, bend and extend knees, open and close hips.
SOURCES: Rothman Institute, Philadelphia, PA and American Academy of Orthopaedic Surgeons; www.lifescript.com
Visit your doctor regularly and listen to your body.
EVERY MONDAY – Read Dr. Paul J. Mackarey “Health & Exercise Forum!” via Blog
EVERY SUNDAY in "The Sunday Times" - Read Dr. Paul J. Mackarey “Health & Exercise Forum!” in hard copy
This article is not intended as a substitute for medical treatment. If you have questions related to your medical condition, please contact your family physician. For further inquires related to this topic email: drpmackarey@msn.com
Paul J. Mackarey PT, DHSc, OCS is a Doctor in Health Sciences specializing in orthopaedic and sports physical therapy in Scranton and Clarks Summit. Dr. Mackarey is in private practice and is an associate professor of clinical medicine at Geisinger Commonwealth School of Medicine. For all of Dr. Mackarey's articles, visit our exercise forum!