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Osteoarthritis is a degenerative joint disease that typically affects joints in the knees, hip, hand, feet, and spine. It is the most common form of arthritis.

Risk Factors


Symptoms of osteoarthritis begin gradually and worsen slowly over time. Osteoarthritis pain is generally described as:


Osteoarthritis is usually diagnosed based on a physical exam and the results of x-rays. In some cases, the doctor may take a sample of synovial fluid from the joint.


There is no cure for osteoarthritis, but treatment can reduce pain and improve flexibility, joint movement, and quality of life. Treatment options include:

Knee Osteoarthritis Guidelines

In 2013, the American Academy of Orthopedic Surgeons (AAOS) released revised clinical practice guidelines for the treatment of osteoarthritis of the knee. Among the key recommendations:


Osteoarthritis, also known as degenerative joint disease, is the most common form of arthritis. In osteoarthritis, joints progressively lose cartilage, the slippery material that cushions the ends of bones.


Osteoarthritis is a chronic disease of the joint cartilage and bone, often thought to result from "wear and tear" on a joint. Joints appear swollen, are stiff and painful, and usually feel worse with increased use throughout the day.

As a result, the bone beneath the cartilage changes and develops bony overgrowth. The tissue that lines the joint can become inflamed, the ligaments can loosen, and the muscles around the joint can weaken. The person feels pain and has limited movement when using the joint.


Joints provide flexibility, support, stability, and protection. Specific parts of the joint, the synovium and cartilage, provide these functions.

Synovium: The synovium is the tissue that lines a joint. Synovial fluid is a lubricating fluid that supplies nutrients and oxygen to cartilage.

Cartilage: The cartilage is a slippery tissue that coats the ends of the bones. Cartilage is composed of 4 components:

The combination of collagen and water forms a strong and slippery pad in the joint. This pad (meniscus) cushions the ends of the bones in the joint during muscle movement.

Osteoarthritis develops when cartilage in a joint deteriorates. The process is usually slow:

As the body tries to repair damage to the cartilage, other problems can develop:

Unlike some other types of arthritis, such as rheumatoid arthritis, osteoarthritis is less likely to involve many joints around the body or migrate from one joint to another. Rather, it affects 1 or a few joints, usually joints that have received extra wear.

Osteoarthritis affects joints differently depending on their location in the body:


The exact causes of osteoarthritis are not known. Scientists think that osteoarthritis most likely develops from a combination of factors, including genetic susceptibility and joint injury.

The body's ability to repair cartilage declines with increasing age. Osteoarthritic cartilage is chemically different from normal cartilage. As chondrocytes (the cells that make cartilage) age, they lose their ability to repair damage and produce more cartilage. This process likely plays an important role in the development and progression of osteoarthritis.

Osteoarthritis tends to run in families. Genetic factors may be involved in about half of osteoarthritis cases in the hands and hips, and in a lower percentage of cases in the knee. Several genes that might contribute to an inherited risk are under investigation.

The inflammatory response is a reaction of the immune system to an injury or other assault in the body, such as an infection. This response causes specific immune factors, called cytokines, to gather in injured areas and cause inflammation. Sometimes this can lead to chronic or persistent inflammation that does not resolve itself and can damage body tissue and cells. The inflammatory response plays an important role in rheumatoid arthritis, and other muscle and joint problems associated with autoimmune diseases.

Inflammation is probably less important during the early stages of osteoarthritis and is more likely to be a result, not a cause, of the disease. However, inflammation may contribute to the progression of osteoarthritis and in its chronic nature. The effects of the inflammatory response in osteoarthritis are likely to be different, and less severe, than those in rheumatoid arthritis.

Joint damage from injuries or recurrent stress to the joint is often the starting point in the osteoarthritis disease process. Osteoarthritis sometimes develops years after a single traumatic injury to or near a joint. People with knee injuries may be up to 5 times more likely to develop osteoarthritis in the injured knee than those without injuries, and people with hip injuries may be more than 3 times more likely to develop arthritis in the injured hip. Proper treatment of injuries may help prevent the development of osteoarthritis.

Other causes of osteoarthritis include:

Risk Factors

Osteoarthritis can affect people of any age, but it is more common in older people. It rarely occurs in people younger than age 40.

In people younger than age 45, osteoarthritis occurs more frequently in men. After age 45, it develops more often in women. Some research suggests that women may experience greater muscle and joint pain than men.

Obesity increases the risk for osteoarthritis. It also worsens osteoarthritis once deterioration begins. This higher risk is due to increased weight on the joints.

Because injuries can trigger the disease process, people involved in jobs or leisure activities that place them at risk for muscle and joint injuries may face a higher risk for osteoarthritis later on in life.

Occupational Risks: Certain occupations with repeated stressful motions (squatting or kneeling with heavy lifting) can contribute to the deterioration of cartilage. People with jobs that require kneeling or squatting for more than an hour a day are at high risk for knee osteoarthritis. Jobs that involve lifting, climbing stairs, or walking also pose some risk.

Exercise: There have been questions about the role of strenuous exercise in osteoarthritis. Sports that definitely pose a higher risk for osteoarthritis have repetitive or direct joint impact (such as football), joint twisting, or both (baseball pitching or soccer).

Regular and moderate exercise is, however, important for everyone and does not increase the risk for osteoarthritis. In middle-aged and older people, recreational weight-bearing exercise (walking and jogging), neither prevents osteoarthritis nor increases risk. Furthermore, many factors associated with a sedentary life (muscle weakness and obesity) are associated with a higher risk for osteoarthritis.


The pain of osteoarthritis begins gradually after age 40 and progresses slowly over many years. Younger people with the condition may have no symptoms.

Osteoarthritis is commonly identified by the following symptoms:

Hand: Osteoarthritis of the hand occurs most often in older women and may be inherited within families. The following joints are most frequently affected:

Osteoarthritis of the hand may predict later development of osteoarthritis in the hip or knee.

Knee: Osteoarthritis is particularly debilitating in the weight-bearing joints of the knees. The meniscus, the cartilage pad between the joint formed by the thighbone and the shinbone, plays an important role in protecting this joint. It acts as a shock absorber. The joint is usually stable until the disease reaches an advanced stage when the knee becomes enlarged and swollen. Although painful, the arthritic knee usually retains reasonable flexibility.

Hips: 1 in 4 people develop hip arthritis over the course of their lifetime. Being obese increases the risk. Osteoarthritis frequently strikes the weight-bearing joints in 1 or both hips. Pain develops slowly, usually in the groin and on the outside of the hips, or sometimes in the buttocks. Pain may also radiate to the knee, confusing the diagnosis. Those with osteoarthritis of the hip often have a restricted range of motion (particularly when trying to rotate the hip) and walk with a limp, because they slightly turn the affected leg to avoid pain.

Spine: Osteoarthritis may affect the cartilage in the disks that form cushions between the bones of the spine, the moving joints of the spine itself, or both. Spinal osteoarthritis can affect the neck (cervical), mid-back (thoracic), or lower back (lumbar) regions. Osteoarthritis in any of these locations can cause pain, muscle spasms, and diminished mobility. In some cases, the nerves may become pinched, which produces radiating pain. Advanced disease may result in numbness and muscle weakness.

Shoulder: Osteoarthritis is less common in the shoulder area than in other joints, but it may develop in the shoulder joint (the glenohumeral joint). In such cases, it is most often associated with a previous injury, and patients gradually develop pain and stiffness in the back of the shoulder. Osteoarthritis also can develop in the acromioclavicular (AC) joint, which is between the shoulder blade and the collarbone. However, it rarely causes symptoms in this location.


Diagnosis of osteoarthritis is based on physical symptoms, medical history, and x-ray images. Other tests may also be performed.

Your doctor will ask you about the type of pain you experience, when it occurs, how long it lasts, and whether you have ever injured the joint.

In osteoarthritis, the affected joint is generally tender to pressure along the joint line. Joint movement may cause a crackling sound. The bones around the joints may feel larger than normal. The joint's range of motion is often reduced, and normal movement is often painful.

Osteoarthritis is often visible in x-rays. Cartilage loss is suggested by certain characteristics of the images, such as:

Some people may have osteoarthritis even though it does not show up on an x-ray. Likewise, other people may have minimal symptoms even though an x-ray clearly shows they have osteoarthritis.

An MRI exam of an arthritic joint is generally not needed, unless the doctor suspects other causes of pain.


X-rays are a form of ionizing radiation that can penetrate the body to form an image on film. Structures that are dense (such as bone) will appear white, air will be black, and other structures will be shades of gray depending on density. X-rays can provide information about obstructions, tumors, and other diseases, especially when coupled with the use of various contrast materials.

If the diagnosis is uncertain or infection is suspected, your doctor may recommend taking a sample of synovial fluid from the joint. The doctor inserts a sterile needle into the joint and withdraws the synovial fluid into a syringe attached to the needle.

The fluid is sent to a laboratory for analysis, which may reveal:


Blood test results may help identify other types of arthritis besides osteoarthritis. Some examples include:

Numerous conditions cause symptoms of joint aches and pains. Something as simple as sleeping on a bad mattress or as serious as cancer can mirror symptoms of osteoarthritis. Other problems that can cause aches and pains in the joints include physical injuries, infections, tendinitis, and poor circulation.

Osteoarthritis can generally be distinguished from other joint diseases by considering several factors together:

Below are a few of the most common disorders that can be confused with, or may even accompany, osteoarthritis.

Rheumatoid Arthritis: Osteoarthritis can be confused at times with milder forms of rheumatoid arthritis, particularly when osteoarthritis affects multiple joints in the body. Rheumatoid arthritis normally occurs earlier in life than osteoarthritis, often striking people in their 30s and 40s. Rheumatoid arthritis affects many joints, and often occurs symmetrically on both sides of the body. People with rheumatoid arthritis generally have morning stiffness that lasts for at least an hour. (Stiffness from osteoarthritis usually clears up within half an hour.) Although osteoarthritis can occasionally cause swollen, red joints, this appearance is much more typical of rheumatoid arthritis and other types of inflammatory arthritis. In addition to blood tests, x-rays can help show differences between rheumatoid arthritis and osteoarthritis.

Rheumatoid arthritis

Rheumatoid arthritis is a body-wide (systemic) autoimmune disease that initially attacks the synovium, a connective tissue membrane that lines the cavity between joints and secretes a lubricating fluid known as the synovial fluid.

Chondrocalcinosis (Pseudogout): Chondrocalcinosis (pseudogout syndrome) is a disease in which a certain type of calcium crystal known as CPPD (calcium pyrophosphate dihydrate) accumulates in the joints. This condition can accompany and even worsen osteoarthritis. Chondrocalcinosis is also called pseudogout or pseudo-osteoarthritis, particularly the latter when it affects the knees. A doctor can usually differentiate between the 2 disorders because chondrocalcinosis usually damages other joints (wrists, elbows, and shoulders) that are not normally affected by osteoarthritis.

Charcot's Joint: Charcot's joint occurs when an underlying disease, usually diabetes, causes nerve damage in the joint, which leads to swelling, bleeding, increased temperature, and changes in bone. There may be a loss of sensation that leads to an increased risk of injury from overuse. The nerve pain associated with Charcot's joint may be mistaken for osteoarthritis.


There is no cure for osteoarthritis, but there are many treatments that can relieve symptoms and significantly improve the quality of life.

The goals of osteoarthritis treatment are to reduce pain and improve joint function. Treatment approaches include:

Lifestyle Changes

Lifestyle changes can help reduce stress on affected joints.

Joints need motion to stay healthy. Long periods of inactivity cause the arthritic joint to stiffen and the adjoining tissue to waste away (atrophy). A moderate exercise program that includes low-impact aerobics and power and strength training has benefits for people with osteoarthritis. Even light-intensity exercise can help prevent osteoarthritis progression and disability.

Exercise helps:

Exercise especially helps people with mild-to-moderate osteoarthritis in the hip or in the knee. Many people who begin an aerobic or resistance exercise program report less disability and pain. They are better able to perform daily chores and remain more independent than their inactive peers. Older people and those with medical problems should always check with their doctors before starting an exercise program.

Three types of exercise are best for people with osteoarthritis:

Strengthening and Resistance Exercise: Strengthening exercises include isometric exercises (pushing or pulling against static resistance). Isometric training builds muscle strength while burning fat, helps maintain bone density, and improves digestion. For people with arthritis in the hip or knees, exercises that strengthen the muscles of the upper leg are important.

Aging and exercise

Exercise, such as weightlifting, helps build muscle that is usually lost with age and puts stress on bones, keeping them strong and healthy.

Range-of-Motion Exercise: These exercises increase the amount of movement in joints. In general, they are stretching exercises. The best examples are yoga and tai chi, which focus on flexibility, balance, and proper breathing.

Aerobic Exercise: Aerobic exercises help control weight and may reduce inflammation in some joints. Low-impact workouts also help stabilize and support the joint. Cycling, walking, elliptical training, and cross-country skiing are beneficial for people with osteoarthritis, and swimming or exercising in water is highly recommended. People with osteoarthritis should avoid high-impact sports such as jogging, tennis, and racquetball if they cause pain.

Overweight people with osteoarthritis can lessen the shock on their joints by losing weight. Knees, for example, sustain an impact 3 to 5 times the body weight when descending stairs. Losing 5 pounds of weight can eliminate 20 pounds of stress on the knee. The greater the weight loss, the greater the benefit. The American Academy of Orthopedic Surgeons recommends that people with a body mass index (BMI) greater than 25 should try to lose at least 5% of their body weight.

Weight reduction is best achieved through both diet and exercise. Studies indicate that for overweight people with osteoarthritis, a combination of diet and exercise is the most effective way to help reduce pain and improve functioning.

Physical therapy is helpful for osteoarthritis. Some research suggests a program of physical therapy 3 times a week for 4 weeks.

A physical therapist will use a variety of techniques to help increase strength, flexibility, and range of motion in the joints. The therapist will use hands-on treatment and may also apply other modalities.

For example, ultrasound therapy uses high-energy sound waves to produce heat within the tissue, which may help reduce inflammation, relieve pain, and improve function. The therapist applies gel to the affected area (usually the knee) and moves a handheld ultrasound transducer over the joint.

A physical therapist can show you ways to more easily perform daily tasks of living without putting stress on your joints. Your therapist can recommend how to make changes in your workplace or work tasks to avoid repetitive or damaging motions. Your therapist may also advise you on hot or cold treatments to use for pain.

Ice: When a joint is inflamed (particularly in the knee) applying ice for 20 to 30 minutes can be helpful. If an ice pack is not available, a package of frozen vegetables works just as well.

Heat Treatments: Soaking in a warm bath or applying a heating pad may help relieve stiffness and pain.

A wide variety of devices are available to help support and protect joints, although it is unclear how effective they are. Some of these devices include splints or braces, and shoe inserts or orthopedic shoes. However, evidence suggests that lateral wedge insoles are not helpful for knee osteoarthritis. An offloading (also called unloading) brace is commonly used for knee osteoarthritis to help transfer the weight off the affected joint.

There are many different types of assistive devices that can help make your life easier in the home. Kitchen gadgets, such as jar openers, assist with gripping and grabbing. Door-knob extenders and key turners are helpful for people who have trouble turning their wrists. Bathrooms can be fitted with shower benches, grip bars, and raised toilet seats. An occupational therapist can advise you on choosing the right kinds of assistive devices.

Relaxation: Relaxation techniques such as guided imagery and breathing exercises may help some people better cope with chronic pain.

Acupuncture: Some people use acupuncture to reduce osteoarthritis pain. The technique is painless and involves the insertion of small fine needles at select points in the body. Some studies have found that acupuncture is effective for treating chronic pain and can help provide pain relief for osteoarthritis.

TENS: Transcutaneous electric nerve stimulation (TENS) uses low-level electrical pulses to suppress pain. A variant (sometimes called percutaneous electrical nerve stimulation, or PENS) applies these pulses through a small needle to acupuncture points. Some people with knee osteoarthritis find this treatment helpful.

Massage: Massage therapy may help provide short-term pain relief for some people. It is important to work with an experienced massage therapist who understands how not to injure sensitive joint areas.

Glucosamine and Chondroitin: Glucosamine hydrochloride and chondroitin sulfate are natural substances that are part of the building blocks found in and around cartilage. For many years, researchers have been studying whether these dietary supplements really work for relieving osteoarthritis pain. Earlier studies suggested a potential benefit from these supplements.

However, more recent high-quality studies involving large numbers of patients have indicated that glucosamine and chondroitin, either alone or in combination, do not seem to work any better than a placebo for relieving symptoms of osteoarthritis.

Based on these studies, the American College of Rheumatology does not recommend the use of these supplements. Some doctors suggest a trial period of 3 months to see if glucosamine and chondroitin work. If the person does not experience any benefit, the supplements should be discontinued.

Boswellia Serrata: Boswellia serrata, also known as Indian frankincense, is an herbal extract that has long been used in traditional Ayurvedic and folk medicine. There is evidence that the herb contains anti-inflammatory properties, which may possibly be of benefit for osteoarthritis.

S-adenosylmethionine (SAMe): S-adenosylmethionine (SAMe, pronounced "Sammy") is a synthetic form of a natural byproduct of the amino acid methionine. SAMe has been marketed as a remedy for arthritis, but lacks the scientific evidence to support these claims.

Generally, manufacturers of herbal remedies and dietary supplements do not need FDA approval to sell their products. Just like a drug, herbs and supplements can affect the body's chemistry, and therefore have the potential to produce side effects that may be harmful. There have been several reported cases of serious and even lethal side effects from herbal products. Always check with your doctor before using any herbal remedies or dietary supplements.


Acetaminophen (Tylenol, generic) is the first choice for treating mild-to-moderate osteoarthritis pain. Because acetaminophen has fewer side effects than nonsteroidal anti-inflammatory drugs (NSAIDs), most doctors suggest trying this drug first, then switching to an NSAID if acetaminophen does not provide sufficient pain relief. Acetaminophen is an analgesic that helps relieve pain but unlike NSAIDs it does not help reduce inflammation.

Acetaminophen is inexpensive and generally safe. It poses far less of a risk for gastrointestinal problems than NSAIDs. However, it does pose a risk for liver damage if more than the prescribed amount is taken. Drinking alcohol while taking acetaminophen significantly increases the risk for liver damage. Long-term, high-dose acetaminophen therapy may increase the risk for high blood pressure

The FDA-recommended daily dose limit of acetaminophen is 4,000 mg but many doctors advise not taking more than 3,000 mg per day. Carefully read the label of your acetaminophen bottle because dosage amounts vary depending on the product. For example, regular strength acetaminophen contains 325 mg per pill, while "arthritis pain" branded products contains 650 mg of acetaminophen per pill.

Nonsteroidal anti-inflammatory drugs (NSAIDs) block prostaglandins, the substances that dilate blood vessels and cause inflammation and pain. There are dozens of NSAIDs:

Oral NSAIDs should be used only for a short period of time. Long-term use of NSAIDs does not delay the progression of osteoarthritis and can increase the risk of side effects.

Use only the lowest effective dose of NSAIDs. High dosages can cause heart problems (such as increased blood pressure and risk of heart attack), kidney problems, and stomach bleeding. Because of these risks, the American College of Rheumatology recommends using topical NSAIDs in place of oral NSAIDs, for people age 75 years and older.

People who take daily low-dose aspirin for heart protection should consider using an oral NSAID other than ibuprofen. Ibuprofen may make the aspirin less effective.

People who are at increased risk of stomach bleeding and ulcers should switch to another type of pain reliever, or take the NSAID along with a proton-pump inhibitor drug, such as omeprazole (Prilosec, generic) or esomeprazole (Nexium), an H2 blocker such as famotidine (Pepcid, generic), or with the synthetic prostaglandin misoprostol (Cytotec, generic). (Misoprostol can cause miscarriage and should not be used by women who may be pregnant.) Some NSAIDs are available as combination pills; they include diclofenac/misoprostol (Arthrotec, generic) and ibuprofen/famotidine (Duexis).

Capsaicin is a component of hot red peppers and may bring pain relief when used as a skin cream (Zostrix, generic). This is the only skin preparation that does more than just mask pain or reduce it temporarily. Capsaicin seems to reduce a substance in the body, known as substance P, which contributes both to inflammation and the delivery of pain impulses to the central nervous system.

A small amount of capsaicin must be applied to the area of inflammation about four times a day. During the first few days of use, capsaicin causes a warm, stinging sensation when the cream is applied. This sensation goes away, and pain relief usually begins within 1 to 2 weeks. The American College of Rheumatology recommends topical capsaicin for hand osteoarthritis but not for knee or hip osteoarthritis.

Topical over-the counter joint pain relievers that contain menthol, methyl salicylate, and (less commonly) capsaicin may in rare cases cause chemical burns. Menthol and methyl salicylate products are sold under brand names such as Bengay, Flexall, Icy Hot, and Mentholatum. Products that contain capsaicin include Capzasin as well as Zostrix. The risks appear more severe for combination products that contain higher doses of both menthol (greater than 3%) and methyl salicylate (greater than 10%).

The FDA warns:

These warnings also apply to the topical NSAID products that contain trolamine salicylate (see NSAIDs section above).

Duloxetine (Cymbalta, generic) is a serotonin-norepinephrine reuptake inhibitor (SNRI) antidepressant that is used to treat depression, anxiety disorders, diabetic nerve pain, and fibromyalgia. In 2010, the FDA approved duloxetine for treatment of chronic musculoskeletal pain associated with osteoarthritis.

Tramadol (Ultram, generic) is a pain reliever that has been used as an alternative to opioids. It has opioid-like properties but is not as addictive. However, there have been reports of dependence and abuse. Tramadol can cause nausea but does not cause severe gastrointestinal problems, as NSAIDs can. Some people experience severe itching. A combination of tramadol and acetaminophen (Ultracet, generic) is available.

Narcotics are pain-relieving and sleep-inducing drugs that act on the central nervous system. They are the most powerful medications available for the management of moderate-to-severe pain. There are 2 types of narcotics:

Although the use of narcotics for arthritic pain is controversial, they may have a place in osteoarthritis treatment when milder drugs are not effective or appropriate. These drugs can be highly addictive, and should be prescribed at the lowest possible effective dose.

Common side effects include anxiety, constipation, nausea and vomiting, dizziness, drowsiness, paranoia, urinary retention, restlessness, and labored or slow breathing.

When pain becomes a major problem and less potent pain relievers are ineffective, doctors may try corticosteroid (steroid) injections into the joint. Corticosteroid shots are useful only if inflammation is present in the joint. Relief from pain and inflammation is of short duration, and this treatment is rarely used for chronic osteoarthritis. The American College of Rheumatology does not recommend these injections for hand osteoarthritis.

Corticosteroid injections are usually given every 3 months. People should not have more than 2 or 3 injections a year, since there is some concern that repeated injections over the long term may be harmful. Because long-term use of corticosteroids has many potentially serious side effects, steroid medications are never given by mouth (systemically) for the treatment of osteoarthritis.

Injections of hyaluronic acid (Hyalgan, Synvisc, Artzal, and Nuflexxa) into the joint, a procedure called viscosupplementation, is a controversial treatment for knee osteoarthritis. Evidence indicates that these injections provide only very modest, short-term pain relief at best. Some studies suggest these injections may increase the risk for swelling and inflammation. The American Academy of Orthopedic Surgeons no longer recommends viscosupplementation as a treatment for people with symptomatic osteoarthritis of the knee.


If lifestyle measures and medications fail to relieve pain and increase function, surgery may be an option. Certain surgical procedures can help relieve pain if medications fail. Even with these procedures, joint replacement may still be needed later on.

When osteoarthritis becomes so severe that pain and immobility make normal functioning impossible, people may be eligible for artificial (prosthetic) joint implants using a procedure called arthroplasty. Arthroplasty involves removing the surfaces of the joint and replacing them with an artificial material made of metal, plastic, or other material.

Hip replacement is the most established and successful replacement procedure, followed by knee replacement. Other joint surgeries (shoulders, elbows, wrists, and fingers) are less common, and some arthritic joints (in the spine, for instance) cannot yet be treated in this manner.

Knee joint replacement - series

Candidates: In evaluating the need for surgery, a person's pain and disability are more important considerations than age or other factors (such as weight).

Joint replacement is effective for people of all ages. While older people may take longer than younger people to achieve full recovery, the long-term outcome of the surgery is usually excellent, and can lead to significant improvements in pain and quality of life. In the past, surgeons generally recommended delaying joint replacement for younger people, because of concerns of implants wearing out and the need for additional revision procedures in the future. Newer, longer-lasting materials are helping to reduce the need for revision operations.

Hip joint replacement - series

Complications: Complications from joint replacement can occur and, in rare cases, be life threatening. In addition to blood loss and infection, deep blood clots in the legs (deep venous thrombosis) are a serious potential complication. These clots can potentially travel to the lungs (pulmonary embolism) and pose a risk for death. People who are overweight are at higher than average risk for blood clots.

Metal ball and socket components are sometimes used in both total hip replacement and hip resurfacing procedures. The FDA is currently reviewing the safety of these "metal-on-metal" components to see if they increase swelling and pain. There is also concern that metal ions (particles) may be released into the bloodstream, where they might trigger allergic reactions and other problems. Talk with your surgeon about the type of materials that will be used in your procedure and their possible risks and benefits. If you experience any swelling or pain after surgery, be sure to notify your doctor.

Recovery and Rehabilitation: Aside from the surgeon's skill and the person's underlying condition, the success rate depends on the kind and degree of activity the joint receives following replacement surgery. Physical therapy takes about 6 weeks to rebuild adjoining muscle and strengthen surrounding ligaments. People typically experience considerable pain during this time.

While many people find that joint replacement eventually provides pain relief and restores some mobility, they need time to adjust to the artificial joint.

Limitations after hip surgery include:

Limitations after knee surgery include:

Minimally Invasive Arthroplasty: Surgeons are exploring a variety of new techniques for a minimally invasive approach to knee and hip arthroplasty. They include using a shorter incision, and new types of smaller specialized instruments. The goal is to give the person a shorter recovery time and less postoperative pain. However, minimally invasive arthroplasty is still in its early stages. At this time, there is no consensus on which minimally invasive technique works best, or if it actually achieves any additional benefits beyond the recovery period.

Alternatives to Total Joint Replacement: Surgical alternatives to total knee or hip joint replacement include:

Osteotomy is a surgical procedure used to realign bone and cartilage and reposition the joint to help transfer weight from a damaged to healthy part of the knee. The procedure involves making a cut in 1 of the bones in the lower leg and removing a slice of bone to straighten the leg.

There are 2 types of osteotomy surgery:

Osteotomy is generally performed for early-stage knee osteoarthritis that has affected only a certain section (compartment) of the knee. According to the American Academy of Orthopedic Surgeons, this procedure works best for people who are thin, active, or younger (40 to 60 years old).

If the affected joint cannot be replaced, surgeons can perform a procedure called arthrodesis that eliminates pain by fusing the bones together. The person must understand, however, that fusing the bones makes movement of the joint impossible. Bone fusion is most often done in the spine and in the small joints of the hands and feet.

Arthroscopy with lavage and debridement is sometimes performed to clean out bone and cartilage fragments that, in theory at least, may cause pain and inflammation. Arthroscopy is also sometimes used to diagnose osteoarthritis. In this procedure, the surgeon makes a small incision and inserts the arthroscope, a pencil-width fiber-optic instrument that contains a light and magnifying lens. The arthroscope is attached to a miniature television camera that allows the surgeon to see the inside of the joint. Saline solution is injected to wash out the debris (lavage) and the fragments are then removed (debridement).

Research and debate continues on whether arthroscopy is truly helpful for osteoarthritis and, if so, which people may benefit the most from it. Most guidelines do not recommend this treatment for people who have symptoms of osteoarthritis but no other problems such as loose fragments or meniscus tears. Arthroscopy may possibly benefit people with mild-to-moderate osteoarthritis who have bone and cartilage fragments in the joint, or people whose joints lock or catch with movement.

Knee arthroscopy - series



American Academy of Orthopedic Surgeons (AAOS). Treatment of osteoarthritis of the knee: Evidence-based guideline 2nd edition (summary). Rosemont, IL. Published May 18, 2013.

Bozic KJ, Browne J, Dangles CJ, Manner PA, Yates AJ Jr, Weber KL, et al. Modern metal-on-metal hip implants. J Am Acad Orthop Surg. 2012 Jun;20(6):402-6.

Cameron M, Chrubasik S. Oral herbal therapies for treating osteoarthritis. Cochrane Database Syst Rev. 2014 May 22;5:CD002947.

Dunlop DD, Song J, Semanik PA, Sharma L, Bathon JM, Eaton CB, et al. Relation of physical activity time to incident disability in community dwelling adults with or at risk of knee arthritis: prospective cohort study. BMJ. 2014 Apr 29;348:g2472.

Fransen M, McConnell S, Hernandez-Molina G, Reichenbach S. Exercise for osteoarthritis of the hip. Cochrane Database Syst Rev. 2014 Apr 22;4:CD007912.

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Leopold SS. Minimally invasive total knee arthroplasty for osteoarthritis. N Engl J Med. 2009 Apr 23;360(17):1749-58.

Manheimer E, Cheng K, Linde K, Lao L, Yoo J, Wieland S, et al. Acupuncture for peripheral joint osteoarthritis. Cochrane Database Syst Rev. 2010 Jan 20;(1):CD001977.

Messier SP, Mihalko SL, Legault C, Miller GD, Nicklas BJ, DeVita P, et al. Effects of intensive diet and exercise on knee joint loads, inflammation, and clinical outcomes among overweight and obese adults with knee osteoarthritis: the IDEA randomized clinical trial. JAMA. 2013 Sep 25;310(12):1263-73.

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Rutjes AW, Nüesch E, Sterchi R, Jüni P. Therapeutic ultrasound for osteoarthritis of the knee or hip. Cochrane Database Syst Rev. 2010 Jan 20;(1):CD003132.

Sinusas K. Osteoarthritis: diagnosis and treatment. Am Fam Physician. 2012 Jan 1;85(1):49-56.

Vickers AJ, Cronin AM, Maschino AC, Lewith G, MacPherson H, Foster NE, et al. Acupuncture for chronic pain: individual patient data meta-analysis. Arch Intern Med. 2012 Oct 22;172(19):1444-53.

Wandel S, Jüni P, Tendal B, Nüesch E, Villiger PM, Welton NJ, et al. Effects of glucosamine, chondroitin, or placebo in patients with osteoarthritis of hip or knee: network meta-analysis. BMJ. 2010 Sep 16;341:c4675.

Review Date: 9/16/2013
Reviewed By: Harvey Simon, MD, Editor-in-Chief, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team. Author: Julia Mongo, MS. A.D.A.M. Editorial Update: 03/29/2015.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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