Showing posts with label Joint replacement. Show all posts
Showing posts with label Joint replacement. Show all posts

Friday, October 31, 2014

Artificial Connections

Capsule of right knee-joint (distended). Poste...
Capsule of right knee-joint (distended). Posterior aspect. (Photo credit: Wikipedia)
By C.CLAIBORNE RAY


For joint replacements, like a knee or hip, is muscle attached to the artificial implant?

Ordinarily “no muscle attaches to any hip or knee implant,” said Dr. Mathias P. Bostrom of the Hospital for Special Surgery in Manhattan. The only human tissue that adheres to an implanted joint is bone.

The link is made either with cement or directly to the bone. When the connection is direct, the bone-producing cells grow new material that forms a bond with the implant, a process called osseointegration.

“A lot of knee implants use a kind of cement, really more of a grout, that fixes to the bone itself,”
 Dr.Bostrom said. “It is an acrylic, similar to Plexiglas, called PMMA, for polymethyl methacrylate.”

In the case of a tumor prosthesis for a bone like the femur – in which a lot of bone is removed and large segments are replaced with metal – there may be some linkage of muscle and tendon to implant, he said.

In most joint implants, however, the muscle is still attached to the bone via the tendon, and the surgeon especially tries to avoid detaching any muscle insertion in the hip or knee.

“We want the tendon’s attachment to the bone to be intact,” Dr. Bostrom said.


Taken from TODAY Saturday Edition, June 15, 2013

Monday, August 4, 2014

Surprising Path to Better Sex: A New Hip

Total Knee replacement : AP view (Xray).
Total Knee replacement : AP view (Xray). (Photo credit: Wikipedia)
English: Hip replacement using cementless impl...
English: Hip replacement using cementless implants. 16 days post-surgery. (Photo credit: Wikipedia)
Hip-Joint, total Replacement, insertion withou...
Hip-Joint, total Replacement, insertion without bone-cement (Photo credit: Wikipedia)
04-August-2014



by Tara Parker-Pope


Want better sex? Consider getting a new hip or knee.

Before Mary Ann Oklesson, a New York magazine publisher, had both hips replaced a few years ago, the pain of arthritis made it difficult to walk, exercise or even climb into a taxi. Her failing hips had also taken a toll on her sex life.

"Sex was somewhat painful," said Ms. Oklesson, now in her early 60s. "If I had to pick my leg up to put it in a cab, you can imagine what sex was like."

But all that changed after hip replacement surgery. "It definitely improved my quality of life, and my love life," she says.

While researchers have long known that hip and knee replacement leads to less pain and improved mobility, new research shows that the surgery offers an unexpected bonus in the bedroom. Among 147 patients who had joint replacement surgery in New York, most said arthritis had interfered with their sex lives, according to research presented in March at the annual meeting of the American Academy of Orthopedic Surgeons. After surgery, 81 percent of those patients who had said their sex lives had suffered as a result of a bad joint reported that the frequency of sexual activity had increased.

Many reported an increase in libido and stamina and an improvement in their ability to climax. The benefits were specially pronounced among patients whose complaint had been failing hips, as well as women, who reported the most discomfort during sex because of painful joints.

"If achieving a position in sexual function is very uncomfortable, it's unlikely to be fruitful in terms of achieving climax," said Dr. Jose A. Rodriguez, director of the Center for Joint Preservation and Reconstruction at Lenox Hill Hospital in New York and lead author of the study.

Hip replacement surgery has risen 85 percent in the past decade, with doctors in the United States performing more than 300,000 procedures in 2010, the latest year for which statistics are available. Much of the increase has been fueled by active middle-age adults, 45 to 65. In that age group, hip replacements have nearly tripled to 128,000 during the same period.

Dr. Claudette Lajam, an orthopedic surgeon at the Center for Musculoskeletal Care at New York University Langone Medical Center, said that so many patients have questions about intimacy after joint replacement that she had added a page to her website devoted to sex.

"That page gets the most hits of any page on my website," Dr. Lajam said. "There are a lot of people who get back out there, or get closer to their spouse, because they've been unable to participate in that intimacy for a while. Just the relief of pain itself improves the relationship."

That was the case for D'Arcy Achziger, an apparel sales director in New York who opted for knee replacement two years ago after suffering from excruciating pain.

After surgery, "my husband was thrilled," said Ms. Achziger. "I had been cranky, just so crabby because it hurt. I was much more pleasant after surgery, and it made his life so much nicer."

Dr. Charles Cornell of the Hospital for Special Surgery in New York, said some patients are hesitant to talk about the toll joint pain can take on their sex life.

"It's especially important to our younger patients," he said, "but believe it or not, I've had patients in their 80s who this has been a topic for."


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Taken from TODAY Saturday Edition, 27-April-2013