My 2 1/2 year old child can finally stop wearing her Pavlik harness. This was to keep her hip from dislocating because of a shallow hip socket. My question is: shouldn’t she wear a splint or something at night? Can we really go from wearing the harness to not wearing the harness after two full years with the harness on?

It looks like that’s what most doctors suggest right now. But it’s not based on any research results or studies of children who have worn the harness. Even the use of the harness varies from doctor to doctor and region to region.

In a recent opinion column Dr. Carl Stanitski from the Medical University of South Carolina (MUSC) called for a study to look at the long-term results of current treatment with the harness. The hope is to come up with objective clinical and imaging guidelines.

Until that information is available continue to ask your physician this question and watch for any updates on the topic.

My six-month old grandson has just been diagnosed with developmental hip dysplasia. What can be done about this problem?

There are a couple of treatment options for this problem. All involve putting the head of the femur (thigh bone) into the hip socket and keeping it there. The concept is called docking.

The idea is that pressure from the bone inside the hip socket will help stimulate normal growth and development. Without this, the socket remains shallow and the hip is in danger of dislocation.

One way to hold this position is with the use of a special device called a Pavlik harness. This is used with the infant or young child who has not started walking yet. It looks like a sling the fits around the outside of the clothing. It holds the legs open and hips rotated out. That’s the position of greatest stability in the hip.

If the harness fails a special trunk and hip brace can be used. Sometimes surgery is needed to reform the hip. The child is put in a body-cast for six weeks afterwards.

We’ve been told our child will need surgery for a chronic hip problem called dysplasia. When’s the best time to do this surgery? He starts school next year. Should we do it before school starts and risk delaying entry? Or wait until the summer after his first year?

Studies suggest earlier may not be better for this type of problem. Surgery too early before major bone growth occurs can disrupt the surgery done. Surgery too late may not be able to change the muscular imbalances that have formed.

The best results seem to occur on children operated on between the ages of seven and twelve. They seem to get the best motion back. They also have the best correction of the leg length difference from side to side. X-rays show fewer arthritic changes later in life.

Surgery for this problem in children between three and six often requires another operation later. Waiting until the child is older than 12 can lead to worse outcomes. It’s likely that at the older ages the bone is less able to adapt and remodel.

Your surgeon will be able to advise you given your child’s case. Let him or her know your concerns about the timing in relation to school and see what’s suggested.

Our four-year old has been treated conservatively for the last three years for a hip problem called developmental dysplasia. It didn’t work. Now he has a squashed hip joint and loss of blood supply to the top of the thighbone. Doctors are doing more testing. What’s likely to happen?

Interruption of the blood supply to the bone is called ischemia. This must be treated right away or the bone can start to die, a process called necrosis. Usually surgery is the next step.

The surgeon will reform the angle of the bone so that the top of the femur (thigh bone) fits into the socket. Sometimes it’s necessary to build a little bridge or cap over the edge of the socket to keep the bone in place. The operation is called an osteotomy for short or the full name: derotational valgus osteotomy.

The results of this operation are usually very good. The changes made help restore the leg length and allow the muscles to function normally again. Many children are able to walk without a limp. Later in life mild arthritic changes may occur. Studies show much more involved arthritis for those who don’t have this surgery.

My son is going in for an X-ray to see if he has one leg longer than the other. The doctor isn’t sure if the leg difference is in the bone or the soft tissues. Would there be any advantage to ask for a CT scan or an MRI?

All three of those imaging methods are equally accurate for measuring limb length. X-rays do expose the person to some radiation. For a single X-ray that isn’t much but if he will need repeated X-rays over time then an MRI might be better (no radiation).

MRIs also give detailed information about the bones and soft tissues. That might be helpful in your son’s case. MRIs are more expensive than X-rays. You might want to check your insurance coverage as part of your decision-making process.

CT scans have decreased radiation exposure compared to X-rays. Their only other real advantage is in assessing leg length difference when the knee can’t straighten out all the way. If that’s not a problem, then X-ray or MRI may be your best bet.

My 2-year old daughter has one leg shorter than the other. They say she’ll probably outgrow it. They will watch it carefully using X-ray studies every six months. I’m concerned about exposure to radiation. Is there some other way to measure this without X-rays?

You’re right to ask about the exposure to radiation with repeated X-rays during childhood. X-rays are the most accurate and reliable means of measuring limb length. But researchers at Cornell University are looking at the accuracy and reliability of other imaging methods.

They compared X-rays to CT scans and MRIs. The results from all three imaging techniques were checked against direct measurement of the bone with electronic calipers. CT scans and MRIs were just as good as X-rays. They are more expensive and require the child to hold still longer but there is no exposure to radiation.

Feel free to bring this concern up to your physician. Perhaps the X-rays could be taken less often (for example, every two years instead of every six months) with other means of imaging in between.

Our 14-year old son is having a lot of back pain that’s keeping him from playing on his soccer team. X-rays were considered “normal” for his age. What other tests can be done? I hate to send him back on the field if there’s something more serious wrong.

At this age plain X-rays are usually enough to rule out serious problems like infection, fracture, or tumor. Occasionally a stress-related injury can cause a fracture in the vertebral bone. This is called spondylolysis.

Other imaging studies may be helpful. Bone scans can be used to show any defects that might not appear clearly on X-rays. MRI or CT scan are sometimes ordered after normal X-rays. It’s not clear which testing is best. Scientists are actively trying to find the best test for this problem.

Most sports medicine physicians will advise caution when playing while having back pain until the problem is clearly identified. Pain-free sports competition is the goal.

Our daughter injured her spine while playing soccer. She thought it happened when she kicked the ball especially hard one time. It seems like that would cause a leg injury, not a back problem. Can you explain this?

Soccer has become a much more popular sport in the last 10 to 15 years. Along with increased sports participation comes an increase in the number of injuries. Knee and ankle injuries top the list for soccer players but about 10 percent report back pain as well.

Doctors at three medical colleges and children’s hospitals studied this problem. From their results they suggest that kicking causes problems for several reasons. First, it is a repetitive action done over and over causing stress over time to the soft tissues. So even though your daughter pinpoints her injury to one kick, it’s likely the result of repeated actions.

Second the position of the ball can make a difference. If the ball is behind the person’s central body axis, then the hip and low back go into hyperextension to kick. The follow through as the leg comes forward causes the spine to go into flexion. It could be this flexion-extension movement during a high-velocity kick results in injuries.

Our five-year old son was just diagnosed with Legg-Perthes’ disease. So far he’s only had X-rays taken. Would an MRI offer any better information at this point?

Treatment for this condition of temporary blood loss to the head of the femur (thigh bone) depends on the condition of the hip. Any imaging study that can show the shape of the femoral head and locate any partial or full dislocations would be helpful.

An MRI is useful because it clearly shows all three parts of the child’s femoral head. The very top of the bone that fits into the hip socket is called the epiphysis.

Just below the epiphysis is the physis. This is the growth center of the femur. It’s here that bone forming cells help the bone grow in length.

The third portion is the metaphysis, the upper part of the femoral neck. Any softening or spongy changes in this area shows a loss of blood supply. An MRI can show if the blood supply has been cut off to one, two, or all three parts of the bone.

My sister and her husband have just found out their son has Perthes’ disease. We don’t want to ask too many questions. Can you tell us what the prognosis is for this disease?

Long-term results of this disease vary based on the age of the child at diagnosis and severity of damage to the bone. In this disease the blood supply to the top of the thigh bone (femur) is temporarily turned off. Without blood, the bone starts to die. This process is called bone necrosis.

Some doctors use a formula to predict a good, fair, or poor prognosis for Perthes’ disease. Points are given based on the child’s age and the appearance of their X-rays.

In the normal hip, the head of the femur is a round ball or in children, a round cap. In Perthes’ disease this shape changes. The still growing cap of the femur can get dislodged or dislocated. Either of these events predicts a worse outcome.

Having a formula like this will help doctors advise families about medical treatment. Surgery may be avoided if the prognosis is good. Early treatment for children with a poor prognosis may improve the final results.

What’s the most likely course of treatment for Perthes’ disease?

Loss of blood to the head of the femur (thigh bone) is called Perthes’ disease. There are four stages to this condition. Treatment depends on which stage the child is in when the diagnosis is made.

Stage one (initial stage) is often unnoticed as often there are no symptoms. Many children are diagnosed in stage two (sclerotic stage) when pain and a limp become obvious. It’s best if treatment can be started in this stage. The goal is to decrease inflammation, pain, and muscle spasm around the hip. Drugs, rest, and physical therapy are used to do this.

Stage three (necrotic stage) ends with stage four called reossification. During this and the final healing stage the goal is to keep the femoral head as round as possible and in the hip socket. It may be necessary to use casts, braces, or even surgery during this stage.

Surgical treatment may be needed much later if there is a leg length difference from lack of growth on the Perthes’ side.

My 14-year old son has been diagnosed with proximal humeral epiphysiolysis. Can you explain what this is?

In layperson’s terms, you’re talking about Little League shoulder. Some call this a stress fracture of the growth plate at the top of the upper arm. It occurs when a large rotational force or load is placed on the bone during the act of throwing.

Damage of this type to the growth plate occurs with repeated trauma. A local inflammatory reaction is set up in the area of the growth plate. Eventually a fatigue fracture occurs.

Doctors prefer to use a term that describes the lesion. In this case proximal refers to the top of the humerus. The humerus is the upper arm. The growth plate is called the epiphysis. Separation of the epiphysis from the bone is an epiphysiolytic fracture or epiphysiolysis.

Our little league team has gone through a dozen pitchers in a year. They keep getting injured. I don’t see this happening on other teams. What could be causing this?

It could be a fluke or there may be one or more specific reasons. Young baseball pitchers often are on the bench for overuse injuries. Many times it’s because of poor throwing techniques. In other cases the boys’ muscles and bones just aren’t developed enough to keep up with the number of pitches required in a season of games.

A recent study of 12-year old youth baseball pitchers in Colorado is starting to shed some light on this topic. Using two high-speed video cameras the boys were filmed from the front and side while throwing 50 mph fastballs.

The movements of the arm and ball were analyzed. They found the arm-cocking position preparing for the pitch puts a lot of rotational force through the bone. The forward release of the ball causes a distractive force on the bone. Without enough muscle bulk to protect the joint, damage can occur.

The coaches can review throwing mechanics and other factors such as quantity and frequency of pitches. Pitchers should be limited in the number of pitches they throw each week. This includes both practice and game time. Some coaches only count the game playing time.

The coach of my daughter’s soccer team says she’s on the bench for a week with a noncontact injury. What does that mean?

Injuries can occur as a result of overuse or trauma. Overuse or overtraining is an example of a noncontact injury. The player develops a sore shoulder or tendinitis that keeps them out of the game.

Traumatic injuries are most often caused by direct contact with another player. Noncontact injuries can be caused by trauma, too. For example the player who changes direction suddenly on a muddy field and tears the anterior cruciate ligament in her knee — that’s a noncontact traumatic injury.

Sometimes a sudden increase in training time can lead to an increased number of noncontact injuries. Returning to training or game play too soon after an injury can also lead to re-injury. If possible find out the cause of your daughter’s injury. She can work with the coach and trainer to design a training program for her specific needs and avoid future injuries.

My 13-year-old son tore his left ACL. The doctor wants to delay surgery until my son’s bones stop growing. Is this really necessary? He’ll miss an entire season of baseball this way.

He will probably miss the entire season either way. If the surgery is done, rehab takes several more months after recovery. It’s best to listen to your doctor’s advice. Studies
show that if the growth plate is disturbed, deformities, fractures, and stunted growth of the limb can occur.

A recent report from the University of Texas advises strict use of a brace and reduced activities while waiting for the growth plates to close up. Surgery to repair the torn ACL can be done within a month after plate closure. The patient can continue to maintain
motion and strength, but twisting or jumping are not allowed.

A study of 13 teenagers with open growth plates and an ACL tear showed no further damage or injury to the joint while waiting for skeletal maturity when following these guidelines. Delaying surgery will likely protect your son for a lifetime of sports and recreation pleasure.

My 14-year old daughter injured herself in a dismount from the balance beam in gymnastics. They think she’ll need surgery to repair a torn ACL, but they say she isn’t “skeletally mature” yet. How can they tell this?

X-ray is the number one tool for determining skeletal maturity. In children and some teens, there are growth plates (physes) at the ends of bones that aren’t fused
solid yet. This allows for bone growth and expansion. The physes are visible on X-ray as dark areas called radiolucency.

In the knee, the physes of the tibial tubercle is the last physis of the knee to fuse. The tibial tubercle is the large bump on the front of the knee, just below the kneecap. Age, height, hair growth, and other signs of sexual development are also part of the picture.

Children who are close to the same height (or taller) than the tallest family member may be close to full bone growth. Also, the smaller the openings between the physes and the main bone (on X-ray), the closer the child is to full maturity.

What is “Little League elbow?” I hear this term used by the coaches at ball practice.

It’s a term used to describe injury to the inside of the elbow. It happens so often in pre-teens and young teens from pitching the name has caught on. When the pitcher throws the ball, the elbow is in a position called valgus. This means the angle of the elbow puts the force on the inside edge of the elbow.

Sports experts think a breaking pitch requires more force and twist on the wrist compared with the standard straight pitch. The force through the wrist travels to the elbow causing this problem.

I’ve been volunteering as an athletic trainer for Little League teams for the past 10 years. I notice the younger kids have problems with pain and soreness on the inside of the elbow. The older kids complain more of pain along the outside of the elbow. Why the difference?

Doctors from a clinic specializing in shoulder and elbow problems offer a guess on this one. In younger children, the medial epicondyle (boney bump on the inside of the elbow) isn’t fully formed yet. There’s a slight separation between the epicondyle and the
main bone. This allows for bone to fill in as the child grows.

As the bone fuses together, the force of the load gets shifted to the outside of the bone. That’s why older players have more symptoms of soreness around the lateral epicondyle (outside of the elbow).

I’ve been coaching Little League for almost 30 years. It seems like more and more kids are coming up with various injuries, especially “pitcher’s elbow” or “Little League elbow.” Are there any studies to say why this is happening?

Various sports injuries have been reported. Researchers always try to find a link or connection to explain what’s happening. When it comes to elbow problems, there’s no doubt the number is on the rise. Before organized baseball, many of these conditions never even
existed.

Repetitive play, long practices, and younger athletes combine together to create this new problem. Growing bone is especially at risk for damage from physical stress, high loads, and repeated motions. In many places, the warm climate allows for year-round practice and play. Some players are so dedicated, they practice hours every day in and out of season.

Which is more important for students carrying a backpack: wearing it over both shoulders or decreasing the amount of weight inside?

A large study of students in Greece reports the carrying method doesn’t make a difference in the amount or kind of back pain students experience. They suggest age, height, and gender are the key factors.

Girls nearing puberty have the highest amount of back pain. Shorter children carry more of a load compared to taller children of the same age carrying the same weight. Adding sports to the picture seems to increase the number of students who suffer from back pain.

Although backpack weight varies from day to day, boys and girls carry about the same amount year round. These researchers suggest girls aged 11 to 12 should carry light backpacks. Girls at the same age shouldn’t join strenuous sports activities. Shorter children should carry lighter backpacks, too. The backpack can be carried on one or both shoulders.