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Customized Knee Replacement in Arizona

The knee is a complex, mobile joint. Knee joints are the largest joints of the body, and they differ in shape and size from other joints. A customized knee replacement uses specially designed implants that are made to fit the unique knee of the patient. Traditional knee replacement requires the surgeon to attempt to match prostheses to fit the knee.

How many knee replacements are performed each year?

In the United States, around 4.7 million people have a total knee replacement. Prevalence increases with age, with around 8% canstockphoto11809008have a history of total knee replacement. Women are more likely to have this operation than men (3 million: 1.7 million).

Why are customized knee implants important?

Once the Arizona knee surgeon selects the implant, the technique requires precision structuring so the implant fits snugly with your individual bone structure. An improper implant fit could result in residual issues that may cause problems after surgery.

Customized knee replacements are an innovative approach to correctly knee problems. The need for a precision implant fit has driven this new trend. Manufacturers now offer customized and personalized implants that are appropriate for gender and the individual knee. In a 2010 study, customized implants were found to reduce sizing problems during surgery, and also, found to replicate the curvature of the patient’s knee, giving a more natural feel to the replacement.

How are customized knee prostheses made?

Customized knee implants are created from CT and MRI scan data obtained from the patient. This assures the implant iFit-Designmatches the natural curves and shape of the knee. Knee implant manufacturers use specific technology to change the images of the knee into a 3D model, which is used to make an implant that matches the patient’s knee. Using scan data, the manufacturer can customize the implant using computer-assisted surgical instrumentation utilized by the surgeon during the procedure.

Why are women’s implants different than men’s?

Called gender-specific knee replacement, women are more petite and require special sized implants. A regular, traditional implant is designed for men, which means the implant for a woman could overhang on the bone at the sides. This could cause soft tissue interference or mid-flexion instability. For some patients, over-sized implants may cause pain and discomfort long after healing is complete. For this reason, new implants are used to accommodate the knee, which is smaller top-rightin women from side-to-side and from front-to-back. This reduces implant misfit and persistent knee pain.

Why do the differences between men and women make knee replacement difficult?

Researchers have found many differences between women’s knees and men’s. The gender-specific implants are based on research that shows:

  • Women’s knees have a thinner profile at the front.
  • Women’s knees have a distinct shape that accommodates the different angle between the knee and hip.
  • Women’s knees have a different contour.

Some researchers believe the differences in knee shape and size have less to do with gender and more to do with genetics. Certain ethnic influences tend to determine knee joint sizes.

Orthopedic and Sports Performance Institute offers customized knee replacements that have an amazing fit with exceptional outcomes. The total knee replacement surgeons in Arizona work with patients from all over the Valley including Gilbert, Mesa, Chandler, Queen Creek and Maricopa AZ.

Most insurance is accepted, call today to meet with the top knee specialists in AZ!

Resources

Bourne, et al; Patient Satisfaction after Total Knee Arthroplasty. Who is Satisfied and Who is Not? Clinical Orthopedics and Related Research; 2010, 468: 57-63.

Mahoney, et al; Overhang of the Femoral Component in Total Knee Arthroplasty: Risk Factors and Clinical Consequences. The Journal of Bone and Joint Surgery; 2010, 92: 1115-1121

 

Preparing for a Total Knee Replacement in Arizona

Preparing for a total knee replacement begins weeks to months before the actual surgery date. Good physical health is important for a successful operation. Getting the upper body strong will improve your ability to use crutches or a walker, and performing leg-strengthening exercises will improve ability to walk on your new knee. In addition, you should follow the Arizona knee replacement doctor’s orders explicitly before undergoing a total knee replacement.

Meeting with the Gilbert Orthopedic Surgeon

To prepare for the total knee replacement, you will meet with the AZ orthopedic knee surgeon. The doctor will ask you Knee pain 3questions about your past medical history, inquire about your current knee problems, and perform a physical examination. In conjunction with an internal medicine evaluation, you may have x-rays, laboratory tests, and an electrocardiogram (heart rhythm test). If you are a smoker, many doctors require that you refrain from smoking for 6 weeks before surgery.

The orthopedic surgeon will discuss your current medications and allergies. Certain agents that thin the blood must be held for several days before surgery. In case you require blood transfusions during surgery or right after, you may want to store your own blood at the hospital’s blood bank. In addition, you should see your dentist to evaluate for infected teeth or gums, which could cause problems with the new knee.

Meeting with the Physical Therapist

Before you undergo surgery, you may see the physical therapist and start an exercise program. The therapist will work with you 2-3 times each week to perform strengthening and flexibility exercises. The work out helps prepare your muscles and soft tissue structures for surgery and recovery.

The physical therapist may either come to your home to assess your recovery environment or simply discuss it with you. If you have stairs, problems with hallways, and other issues, the therapist may recommend that you recover for the first couple of weeks in a skilled nursing facility. This will depend on your unique situation and health conditions.

canstockphoto10845760Preparing your Home and Assistance after Surgery

When you are preparing for surgery, you should begin thinking about recovery after surgery. You will go home from the hospital 2-5 days after the total knee replacement. Since you cannot drive, you should arrange to have a ride home. In addition, you will need someone to help you at home for a few days (getting meals, dressing, follow-up appointments, etc.)

Right Before Surgery

The morning of your surgery, you can brush your teeth and take necessary medications with a small sip of water. You are not to eat solid food within 8 hours before your surgery, and should not drink or eat after midnight. We recommend that you shower the morning of your surgery using an antibacterial soap.

When you arrive at the hospital, you will register at the surgical center. A nurse will have you change into a procedure gown. After discussing the procedure, you must sign a consent form. The nurse will attach monitoring devices to assess blood pressure, pulse, and oxygen level. In addition, an intravenous (IV) catheter is placed in your arm.

Orthopedic and Sports Performance Institute offers the top knee replacement surgeons in Arizona. Often times outpatient knee replacement is performed, and most insurance is accepted at the practice. Call us today to discuss your options with our Gilbert and Chandler knee specialists!

What you need to Know about a Total Knee Replacement

A total knee replacement, also called a knee arthroplasty, involves resurfacing and replacing portions of the bones. The decision to have a total knee replacement is made between you, your family, and your orthopedic surgeon.

The Four Steps of a Total Knee Replacement

There are four basic steps to a total knee replacement procedure. These are:

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  • Prepare the bone – The damaged cartilage surfaces at the ends of the tibia and femur are removed along with a small amount of underlying bone tissue.
  • Position the implants – The removed bone and cartilage are replaced with prosthetic components that recreate joint’s surface. These parts are cemented, or press-fit components are used that grow into the bone.
  • Resurface the patella – The undersurface of the kneecap is cut and resurfaced with a plastic button.
  • Insert a spacer – A medical-grade plastic spacer is inserted between the prosthetic components to create a smooth gliding surface.

Candidates for a Total Knee Replacement

People who will benefit from a total knee replacement include those with:

  • Severe knee pain and stiffness that affects mobility and everyday activities, such as climbing stairs, walking, and risking out of chairs.
  • Moderate to severe knee discomfort with resting.
  • Chronic knee swelling and inflammation that doesn’t improve with medications or rest.
  • Knee deformity, such as bowing out or in of the knee.
  • Inability to improve after conventional treatments (physical therapy, medications, and cortisone injections).
  • Age of 50-80 years.

Orthopedic Evaluation

When you visit the orthopedic surgeon, an evaluation is done. This involves:

  • A medical history – The surgeon gathers information about your past and present conditions and surgeries.
  • Physical examination – This involves assessing the knee motion, strength, stability, and overall leg alignment.
  • X-rays – These images determine the extent of damage and deformity in the knee.
  • Other tests – Includes blood tests, MRI scans, and CT scans.

Preparing for Surgery

The orthopedic surgeon and you will schedule your total knee replacement after reviewing the procedure risks and benefits with you. Several tests are used to determine surgical fitness, including an electrocardiogram, laboratory tests, and urine evaluation. You need to notify the doctor of all your medications, as certain agents that thin the blood must be held for several days.

 

If you live alone, you need to make arrangements to have someone assist you when you come home from surgery. In addition, you should make some modifications to your home. The following items may help with daily activities:

 

  • Secure handrails on stairways
  • Safety bars in the bath/shower
  • A raised toilet seat
  • A stable shower chair
  • A stable chair with a firm seat cushion, a footstool, and a firm back
  • Removing all loose rugs, carpets, and cords

 

The Surgery

 

You will be given general anesthesia, which means you will be asleep and in no pain. After numbing the knee structures to help with post-operative pain, the surgeon makes incisions around the knee. If an arthroscope is used, a small camera and surgical tools are inserted into the incisions. The damaged bone and cartilage are removed, and then new metal and/or plastic implants are positioned. After making all resurfacing changes, the incisions are closed with sutures.

 

After Surgery

 

After the total knee replacement procedure, you are monitored in the recovery room for several hours. Once you wake up, you are moved to a hospital room. Most patients only stay overnight at the hospital, but this depends on your health status, the procedure, and the surgeon’s preference. Rehabilitation begins while you are in the hospital. A physical therapist works with you to help move the nee, and teaches you exercises to restore knee movement, flexibility, and strength.

 

Exercise is an important aspect of home care, especially during the first couple of weeks after total knee replacement. You gradually are able to resume normal activities of daily living, and advance to more rigorous activities after 3-6 weeks.

Knee Replacement Surgery with the Top Orthopedic Surgeons in Gilbert and Chandler

Knee Surgeon Gilbert AZRheumatoid arthritis and osteoarthritis are two conditions that cause people to damage the knee joint and lose knee function. When these things occur, the patient may require knee joint replacement surgery, which is also called total knee arthroplasty (TKA). Total knee replacement, the damaged bone surfaces are replaced with artificial surfaces, called a prosthesis.

When is surgery recommended?

There are a few reasons why your Gilbert orthopedic surgeon may suggest knee replacement surgery. People who will benefit from a total knee replacement generally have:

  • Severe knee stiffness and pain that interferes with usual activities, such as walking, getting up from a chair, and climbing stairs.
  • Moderate to severe knee pain at rest.
  • Bowing or other deformity of the knee joint.
  • Chronic knee swelling and inflammation that does not improve with treatment and rest.
  • Failure to improve on any treatment options, including medications, injections, and physical therapy.

Who is a candidate for surgery?

Recommendations for surgery are not based on age or weight, but rather, on patient’s disability and pain. Most patients are between ages 50 and 80, but the orthopedic surgeon in Chandler will evaluate each person uniquely.

How do I prepare for surgery?

Before the knee replacement procedure, you will undergo a thorough physical examination and several tests used to rule out medical issues that can affect the surgery. You must discuss all medications with your physician, and some blood-thinning agents must be held for several days. You should not eat or drink after midnight, and arrive two hours before your scheduled appointment. Arrange to have someone drive you home upon discharge from the hospital.

What happens during the surgery?

An incision is made over the knee. There are four steps to a knee replacement procedure:

  • Preparing the bone – The damaged cartilage surfaces at the end of the thighbone (femur) and leg bone (tibia) are removed.
  • Positioning the implants – A metal or plastic prosthesis is placed in the areas where the cartilage was removed to recreate a joint surface.
  • Resurfacing the patella – The underside of the patella is resurfaced with a plastic button.
  • Inserting a spacer – A plastic spacer is inserted between the implants to create a smooth gliding surface.

What can I expect after the procedure?

After the knee replacement surgery, you will remain in the hospital for 2-4 days, depending on the extent of the surgery. On the day of your surgery, a physical therapist will teach you exercises to restore leg and knee movement. The therapist works with you 1-2 times each day during your hospital stay. An anticoagulant medication is administered to prevent blood clots, and you must wear elastic stockings to reduce swelling.

What outcome can I expect following a total knee arthroplasty?

After knee replacement surgery, more than 90% of patients report a drastic reduction in knee pain, as well as significant improvement in mobility. However, knee replacement does not allow you to do any more than you could before the development of arthritis. Because excessive weight may cause the replacement to become painful and loosen, weight loss is encouraged. In addition, certain activities should be avoided, such as jogging, jumping, and high-impact sports.

How do I prepare for going home?

Several modifications must be done to make your home easier to navigate following surgery. Be sure to make the following changes:

  • A toilet seat riser with arms
  • Safety bars in the bath or shower
  • Secure handrails on the stairway
  • A stable chair with a firm cushion, back, two arms, and footstool
  • A sleeping area on the same floor as your living area

The top orthopedic surgeons in the East Valley including Gilbert, Chandler and Mesa are at OSPI. Minimally invasive and outpatient procedures are offered for knee replacement, with most insurance plans being accepted.

Call OSPI today for treatment with the top orthopedic surgeons Gilbert and Chandler trusts!

Total Joint Replacement at OSPI – AZ Orthopedic Surgeons

Total Joint Arthroplasties

Joint replacement surgery, also called a total joint arthroplasty (TJA), is a common procedure used to relieve pain, improve mobility, and restore quality of life. There are many types of joint replacement procedures. Joint replacement surgery is used to replace damaged cartilage and any loss of bone structure.

The procedure is a resurfacing of the damaged joint, which relies on the ligaments and muscles for function and support. The replacement joint is called a prosthesis, which can be made of cobalt chrome, stainless steel, titanium, ceramic, or polyethylene.

Osteoarthritis and Joint Dysfunction

The most common conditions that cause joint dysfunction are osteoarthritis and rheumatoid arthritis. Many factors contribute to joint degeneration and damage, which leads to arthritis. Factors include:

  • Developmental abnormalities of the jointknee replacement
  • Heredity
  • Minor repetitive injuries
  • Abnormal cartilage metabolism
  • Severe trauma to the cartilage
  • Being overweight

Total Knee Replacement

The knee is the body’s largest joint, and it is necessary for walking, climbing stairs, and everyday activities. With age, excessive weight, and wear-and-tear from arthritis, the knee joint becomes damaged, making movement painful.

In a total knee replacement, the Gilbert orthopedic surgeon removes the degenerated cartilage surfaces at the ends of the shinbone (tibia) and thighbone (femur), and then replaces these areas with metal or plastic components. A spacer is inserted between the components so the joint will glide in a smooth fashion.

Patients who are candidates for a knee replacement are those with a knee deformity, people with chronic knee inflammation, persons who do not respond to conservative treatment, and anyone with limited movement of the knee. The Centers for Disease Control and Prevention (CDC) reports, in the U.S., more than 719,000 total knee replacements are performed each year.

Total Hip Replacement

The hip is a mobile joint, formed with a ball-and-socket. The ball and socket are both coveredcanstockphoto24680715(1) with articular cartilage, which can wear down from injury, trauma, or arthritis. This causes pain and limited mobility.

A total hip replacement involves removing the ball of the joint (femur head) and replacing it with a metal stem that attaches to the thigh bone. The damaged area of the socket is also replaced with a metal socket, and between these implants, the surgeon places a spacer that helps the joint glide easily. Candidates for a total hip replacement are patients who experience significant hip pain and stiffness, as well as people who have not responded to non-surgical methods. According to the CDC, there are more than 330,000 total hip replacements performed each year in the U.S.

Shoulder Joint Replacement

The shoulder joint consists of three bones: the humerus (upper arm bone), the clavicle (collarbone), and the scapula (shoulder blade). The shoulder is a ball-and-socket joint with cartilage on the ends of the structures to help them glide smoothly against one another. This cartilage breaks down due to arthritis and trauma, causing significant pain and loss of function. A total shoulder joint replacement involves use of prosthetic bone ends to replace the damaged areas. This surgical procedure is used for patients who do not respond to medications and those who have symptoms at rest.

Success Rates of Joint Replacement

The success rate of total joint replacement surgery is quite high. The need for repeat operation in the first ten years is less than 5%. Most replaced joints last from 10-20 years.

The Board Certified hip, knee and shoulder joint replacement surgeons at OSPI are highly skilled in the procedures. The Gilbert orthopedic surgeons offer contemporary, minimally invasive procedures that decrease postoperative pain, bleeding and speed recovery.

Most insurance is accepted at OSPI, call (480) 899-4333 today!

The Latest Advancements in Knee Replacement for Active Boomers

The majority of patients coming in for knee replacement surgery are in their 50s, according to Steven Haas who is heading the Knee Surgery and Attending Orthopedic Surgeon Department at the Hospital for Special Surgery based in New York City. If these statistics are compared with those of 20 years ago, there has been a rapid shift in demand for knee replacement surgery, especially for people in their 50s.

Why the sudden interest and growth of demand for the surgical procedure? The points responsible for this are new and innovative technologies that are being used now, especially in implant design and far more improved surgical techniques that are being used by orthopedic surgeons to meet with the growing demand for knee replacements. In addition, the growing number of baby boomers reaching older age has increased the numbers in need of the procedure.

The Latest in Knee Replacement Surgery

Only recently, the orthopedic community announced the arrival of the newest advancement for the surgery, i.e. a knee replacement implant that can last the patient as much as 30 years instead of the standard 10-15. Moreover, the implant has also been cleared by the FDA which means that those looking for ways to make their implants last longer, can opt for this.

VERILAST technology is used for making the implant that will make it possible for patients to possibly outgrow the implant, rather than the other way round. In addition to this, the implants are thought to be much more functional than the earlier versions, as is proved by a series of tests that researchers underwent before giving that verdict.

Adoption of Better Surgical Procedures and Techniques

Orthopedic surgeons have also changed their way of performing surgical procedures, by introducing techniques such as minimally invasive surgery, which helps in decreasing trauma to the patient, as much as possible, which in turn leads to a faster recovery.

Another development is the usage of small surgical instruments for performing the procedure, where the goal is to cut as little as possible, which will minimize the collateral damage and trauma that came with previous surgical procedures that were extremely invasive in nature.

Better Recovery Rate Due To Minimal Invasive Surgical Procedures

The entire point of such a surgery is not to make the cut big enough to fit the instruments, but rather, to use smaller instruments during the procedure that would best fit the cut made. This is the reason why, smaller incisions are used to get access to the knee area after providing local anesthetic to the patient.

One point in favor of the minimal invasive procedure is that, no need is felt to cut the quadriceps tendon or flip the kneecap upside down in order to gain access to the area, which was required in the case of previous surgical techniques. This has also improved the recovery rate far more significantly and at a much faster rate, than old surgical techniques, so now patients are up and about after only 6 weeks of having the procedure done as compared to 3 months.

OSPI offers expert knee replacement doctors in Gilbert, Chandler and Mesa AZ who specialize in the latest technologies including computer navigation, minimally invasive and even outpatient procedures. Call OSPI today to receive treatment with the top orthopedic doctors in the entire East Valley!

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