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Novel surgery may help young trauma patients avoid total hip replacements

February 5, 2010
Hospital for Special Surgery
A novel surgery using transplanted bone and cartilage may help young patients avoid a hip replacement after a specific traumatic injury to the hip joint, according to a new study.

A novel surgery using transplanted bone and cartilage may help young patients avoid a hip replacement after a specific traumatic injury to the hip joint, according to a case study by orthopedic trauma specialists at Hospital for Special Surgery in New York. The study appears in the February issue of the Journal of Orthopaedic Trauma.

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"This novel technique can help young patients to delay, or even possibly avoid altogether, the need for a total hip replacement," said David L. Helfet, M.D., director of the Orthopedic Trauma Service at Hospital for Special Surgery. Hip replacements typically last 20 to 25 years, so a younger person who undergoes a hip replacement is likely to need multiple hip replacement surgeries/revisions in the span of his or her lifetime. Only one similar case report was found in the literature at the time of preparation of the present manuscript. This case was also a success, and doctors say the studies provide encouragement to clinicians that this type of surgery can be of benefit to other patients with similar injuries.

In certain high-energy accidents such as motor vehicle accidents or when a person falls off a ladder, fractures of the so-called femoral head can occur. The hip consists of a ball and socket joint and a femoral head fracture is an injury to the ball portion of the joint. In high-energy accidents, the femur can be forced to dislocate beyond the socket often causing a femoral head fracture, sometimes with an associated fracture to the hip socket. In the past, femoral head fractures with a bone and cartilage defect were treated primarily with a total hip replacement; which as stated is less than ideal in a young patient who would likely need multiple revision surgeries in their lifetime.

The case reported by researchers at Hospital for Special Surgery involved an injury to an 18-year-old man who was a belted driver involved in a motor vehicle collision, striking a pole. After being admitted and observed at the initial hospital, he was assessed as having a small fracture of the femoral head and was released on crutches. Twenty days following the injury, he presented at Hospital for Special Surgery. (See sidebar on the patient's experience from his point of view below.)

Computed tomography (CT) and magnetic resonance imaging (MRI) examinations were performed, which further delineated the large displaced section of the femoral head and a small associated fracture to the periphery of the hip socket (acetabulum).

Surgery was then performed, by orthopedic surgeons Dr. Helfet and Dr. Robert L. Buly, using a new technique that involves surgical dislocation of the femur in order to access and repair the fracture. Because one-third of the femoral head was missing due to the severe damage associated with the injury, doctors chose to transplant a special piece of frozen bone/cartilage. Hospitals, especially those with larger orthopedic surgery departments, have bone bank facilities that store bone and cartilage tissue based on surgical indications. Once thawed, the cartilage and bone were shaped to fit into the defect. The transplant was then anchored into place with two small headless screws.

"This is one of the first such case reports describing this procedure in the orthopaedic literature," said Dr. Helfet. "The patient has had an early good functional recovery following such a severe injury to his hip joint."

Post-operatively, the patient was on crutches, only 20 lbs weight bearing for two months, but he was told to avoid rigorous activities requiring further exertion. Subsequently, the patient was allowed to slowly progress to weight bearing as tolerated and work on obtaining full range of motion and strength of the hip. The patient returned for regular follow-up visits and x-rays of the hip revealed that the graft had properly incorporated. At 46 months following surgery, the patient is fully rehabilitated, was able to successfully complete his education, and has been able to return to the active life he enjoyed before the injury. Further studies with long-term results are needed, but the early results are promising.

"The surgery was a success. He is currently working as a mechanic for a country club. He was able to return to complete his education and perform a physically demanding job." said Dr. Helfet. "The advantage of this surgery is the ability to delay or even avoid altogether a total hip replacement. Even more importantly, the longer a hip replacement can be delayed in a younger patient, the better, because there is less chance of one or multiple subsequent revision surgeries."

Other authors involved in the case report are Markku T. Nousiainen, M.D,, from Sunnybrook Health Sciences Centre, University of Toronto; Milan K. Sen, M.D., from the University of Texas Medical Center at Houston; and Douglas N. Mintz, M.D., Dean G. Lorich, M.D., Omesh Paul, M.D., and Robert L. Buly, M.D., from Hospital for Special Surgery.

Case Study:

After a Rare Surgery, Pennsylvania Man is Back on the Green

Just three months after graduating high school, 18-year-old Stephen Condur was looking forward to beginning classes at local Northampton College. Those plans were put on hold when he was driving home from work one day in August, 2004, and another driver suddenly pulled out in front of him. Swerving to avoid hitting the other car, Condur instead hit a telephone pole. The impact sent his right leg though his hip joint.

Doctors at the local hospital diagnosed him with a dislocated hip. They reset the joint and Condur was transferred to a larger medical center where he was told to rest for a week. A few days after he was discharged, however, the hip popped back out.

"I called my doctor and he told me it was impossible," Condur said. "He said the x-rays didn't show anything was wrong, but I was still in a lot of pain."

Luckily, Condur's mother, a respiratory therapist, was recommended to an orthopedist in New Jersey close to where she worked. After looking at Condur's x-rays, the orthopedist said it was not a dislocated hip and he should have had surgery right away. The orthopedist called David L. Helfet, M.D., the chief of combined orthopaedic trauma at Hospital for Special Surgery and Condur had an appointment a day or two later.

"I had surgery the same day I saw Dr. Helfet," said Condur. "I wasn't really sure what he was going to do, he had told me that it was a very rare procedure and I was a little worried about it. But when the surgery was over, they said it went really well."

When Condur's leg went through his hip during the accident, the top part of his thigh bone, the ball that fits into the hip socket, had broken into a number of pieces leaving only about two thirds of the ball intact. The normal procedure would have been a hip replacement, said Dr. Helfet, but for someone so young it wasn't the ideal option. So, to repair the damage, Dr. Helfet used a section of frozen cadaver bone and cartilage to repair the missing third.

Now, five years after the accident, Condur said he almost never notices his hip. Instead of going to Northampton, he went to Penn State for a certification in mechanics and now works for the Great Bear Golf and Country Club in Pocono Mountains, Pennsylvania. Close to his home in Henryville, one of the perks is that Condur can play on their top rated golf course once or twice a week.

"Rehab was really hard for the first month or two, I had to relearn how to walk," said Condur, now 23. "About a year after, though, I was able to get back to playing golf, which was what I really missed."

Story Source:

The above story is based on materials provided by Hospital for Special Surgery. Note: Materials may be edited for content and length.

Cite This Page:

Hospital for Special Surgery. "Novel surgery may help young trauma patients avoid total hip replacements." ScienceDaily. ScienceDaily, 5 February 2010. <www.sciencedaily.com/releases/2010/01/100129111837.htm>.
Hospital for Special Surgery. (2010, February 5). Novel surgery may help young trauma patients avoid total hip replacements. ScienceDaily. Retrieved April 21, 2015 from www.sciencedaily.com/releases/2010/01/100129111837.htm
Hospital for Special Surgery. "Novel surgery may help young trauma patients avoid total hip replacements." ScienceDaily. www.sciencedaily.com/releases/2010/01/100129111837.htm (accessed April 21, 2015).

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