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!
I enjoy the privilege of working with people recovering from a wide variety of medical conditions. Many of these conditions can directly affect activities of daily living, particularly, the ability to drive safely: orthopedic and sports injuries, fractures, sprains and strains, joint replacements, hip fractures, shoulder and elbow surgeries and spinal fusions. Despite the many different types of problems, there is one question that is invariably asked, “When can I return to driving?” Unfortunately, the answer is not as simple as the question because it depends on many factors. Furthermore, the implications, such as a serious accident causing further damage to the injury or surgical site or harm to someone else, are significant and possibly critical. So, the next time you ask your physician this question, please follow instructions and be patient…remember, it could be your child or grandchild running into traffic to chase a ball and you would want the driver to be at optimal function to apply the brakes!
In our culture, the inability to drive has a significant impact on lifestyle and livelihood. A study published in the Journal of Bone and Joint Surgery, found that 74% of those unable to drive due to injury or surgery are dependent on family and most of the remainder depend on friends. 4% of those unable to drive have no help at all and more than 25% suffer major financial hardship.
The report also found that family physicians, orthopedic surgeons, podiatrists, and physical therapists are keenly aware of this dilemma but often fail to communicate effectively to patients about driving. Most medical professionals express serious concerns about liability regarding return to driving following an injury or surgery. They feel that there is a lack of data to support decisions and inadequate communication among each other. They agree that they must do a better job communicating with patients and their families so they can better prepare for a period of time during their recovery in which they cannot drive.
Recent studies published in the Journal of the American Academy of Orthopaedic Surgeons (JAAOS) and the Journal of Foot and Ankle Surgery (JFAS),determined that there are two significant components in the decision of safely returning to driving after an injury or surgery; the time required for healing and the time required for a return of function. Additionally, it was found that those wearing a surgical shoe or walking boot demonstrated a significantly slower braking response time even in healthy/non-injured individuals wearing the shoe/boot.
During the time required for healing, in addition to the fear of an additional trauma from a motor vehicle accident to the healing body part, there is a general concern about the potential damage that may come from over using the body part to drive before it is adequately healed. For example, a healing fracture in the right lower leg might be compromised or delayed if one must suddenly and forcefully apply the brakes. Also, during this time, it is not unusual for post-injury or post-surgery patients to use pain medications, including narcotics. This will also compromise judgment and reaction time while driving.
Most orthopedic conditions heal in 6 to 8 weeks. However, as many of you may fully know, once a cast or splint is removed, you are not ready to run or jump. Depending on the severity of the injury, it may take many weeks of aggressive physical therapy to regain strength, range-of-motion, agility and dexterity to function at a safe level for a full return to daily activities, including driving.
The current research reinforces the fact that driving safely requires good function of the entire body. For example, just because you broke your shoulder bone but did not fracture your right leg does not mean that you are able to drive safely. Wearing a sling after arm surgery also compromises driving. First, you need a stabilized and healed injury prior to driving. Then, you must work in rehab to make modifications to return to safe driving. Apply the same scenario to injuries or surgery to the spine (neck and lower back).
*Based on research using driving simulators
7 TIPS TO KNOW WHEN YOU ARE READY TO DRIVE:
Remember, every case is unique and there is no substitute for communication with your orthopedic surgeon, podiatrist, family physician and physical therapist.
Visit your doctor regularly and listen to your body.
Keep moving, eat healthy foods, exercise regularly, and live long and well!
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!
