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|Posted By : Dr.A.K.Venkatachalam, MS,DNB,FRCS,MCH ORTH|
|Posted On : 13 Aug 2008 (Total Views : 3736)|
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Surgical Alternatives to joint replacement for knee pain
Osteoarthritis is a well known disease affecting joints, mainly of the hip, knee and spine. Articular cartilage, the lining tissue at the ends of long bones is mainly affected. The underlying bones, joint capsule and synovial fluid also show changes. Pain, swelling, stiffness, catching are common symptoms.
In Indians, knee osteoarthritis is very common and even younger people in their fourth decade have some earlier symptoms. This article discuss the precursor of the disease, “cartilage lesion” and surgical methods to prevent or treat early cartilage disease. By availing of these alternate methods of surgery the need for joint replacement can be averted or postponed by younger people.
Healing of articular cartilage vs other tissues In most other organs healing takes place by bleeding and organization of the blood clot as you must have observed after suffering an injury to your skin.
This does not happen in cartilage under normal circumstances but can happen under controlled surgical procedures. Articular cartilage damage is permanent and will become worse with time, sometimes requiring surgery. Small areas of cartilage can be repaired by methods discussed here. Larger areas of cartilage loss may need a "biological" or metallic joint replacement.
Biologic transplant is performed by implanting cartilage or menisci obtained from the joints of brain dead fresh cadavers or donors into damaged joints. Liberalization of laws governing cadaver tissue harvesting and availability of cold storage facilities will make this procedure popular.
The other more popular option is total joint replacement. With increased longevity and affluence more people are electing for joint replacement. The life of a total joint prosthesis is fifteen to twenty years and therefore total joint replacement is not advised in younger patients. If ever they do need one, they must understand that in future they may need a revision replacement.
Causative factors for articular cartilage damage
After a sudden mechanical injury in sports or a vehicular accident. Damage to the menisci and ligaments are immediately recognized by clinical methods but cartilage damage goes unnoticed. It may occur over areas of bone bruising seen on MRI films.
Mal alignment of a joint
People with bow legs and knock knees are at risk of getting arthritis at an earlier age. Even people with small degrees of bow legs can develop knee pain as shown on loading experiments in cadaveric knees.
Thermal injury as after short wave diathermy administered by physiotherapists and orthopaedic surgeons as conservative treatment for knee pain.
They are available to treat early cartilage lesions. They can be accomplished through the arthroscope or an open method. Drilling, abrasion, cartilage transfer from the unaffected part of the joint can be accomplished arthroscopically.
Arthroscopic microfracture and Mosaicplasty are two techniques to repair localized cartilage defects.
Arthroscopic Debridement and removal of damaged menisci which are producing mechanical symptoms is possible. Cartilage cells are obtained from the healthy part of a joint and transplanted to diseased part. Cell culture multiplies cells. This procedure is called cartilage transplant. It is recommended for lesions 2- 8cm in active persons. Ligament and meniscal injuries should be treated to prevent early osteoarthritis.
ACL reconstruction is recommended to prevent further damage to the menisci in people with a torn anterior cruciate ligament. Meniscal suture of torn menisci is possible if done early and the tear occurs in a vascularised (with a blood supply) of the meniscus.
Meniscal transplant is a new technique that can substitute the damaged menisci with cadaveric menisci. This procedure is to be to offered to young patients with an ACL injury and concomitant meniscal injury where the torn meniscus has been removed. This surgery will postpone the onset of osteoarthritis. Osteotomy- If congenital or acquired bony malalignment is present then osteotomy can restore normal alignment. In osteotomy either a wedge of bone is removed from the convex side of a deformed leg or a wedge is created on the concave side of the bent leg.
An osteotomy alters the line of abnormal load bearing thus preventing the progression of osteoarthritis. A corrective osteotomy of the knee relieves pain in middle aged people. Evidence is mounting that an osteotomy is not only useful in relieving pain in the symptomatic person but also can prevent knee pain in those with deformities.
People need to be convinced about this fact. These surgical options are alternatives to knee replacement for knee pain in younger patients. They will improve the quality of life and postpone or avoid a knee replacement.
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