Queen's Medical Center POB1, 1380 Lusitana Street, Suite 808, Honolulu, HI 96813

Total Hip Replacements

6 reasons that the anterior hip replacement is better

Total Hip Replacement History

In 2007, the Lancet Journal declared the total hip replacement to be the "Operation of the Century". Over 300,000 total hip replacement operations performed in the USA every year. A hip replacement uses a highly engineered combination of metal, plastic, and ceramic to create an artificial joint. Undergoing a hip replacement relieves pain and improves mobility so that you can resume your normal activities and get back to your life.  The anterior total hip arthroplasty was initially performed in 1947 on patients who were severely disabled by arthritis. The anterior hip approach has recently become popularized as it is a muscle-sparing approach and has several benefits.

Walking after anterior total hip


Total Hip Replacement

When to Have a Hip Replacement?

6 Ways the Anterior Hip Approach Improves Hip Replacements

Have Realistic Expectations of Surgery

Related Pages

Frequently Asked Questions

Schedule Appointment

Hip Replacement

Hip replacements involve the removal of the arthritic part of the hip. This means that the hip socket on the pelvis is resurfaced with metal, and the arthritic femoral head is removed and replaced with a ball and stem that is placed into the femur (thigh bone). There are many different approaches to the hip. The most common ways to approach the hip socket are through the posterior and anterior hip approaches.

Posterior Total Hip Replacement

The traditional posterior surgical approach to total hip replacement goes through the back of the hip. This approach uses a single, long incision to get access to the hip joint. This incision cuts through the gluteus Maximus muscle. The posterior hip replacement also requires the release of a small muscle group called the "short external rotators". These muscles are important to the stability of your hip.

How is the Anterior Hip Different?

The anterior total hip arthroplasty works through an incision through the front of your thigh.  This incision is performed through a muscle-sparing approach. The approach does not cut any muscle, moving apart the muscle to get access to the hip joint. The "short external rotator muscles" are not released, meaning that the hip is more stable.  The anterior approach may not be suitable for all patients. Your orthopaedic surgeon will discuss different surgical approaches with you.

Hip Replacement Diagram

When should you consider having a hip replacement?

A hip replacement is a good option for patients who have severe pain in their hip secondary to arthritis. Most patients with arthritis experience pain in their groin region. Sometimes this pain can be felt on the outside of their hip. Often times patients experience this pain as "knee pain". It can often be difficult to tell when patients have pain that comes from their knee or their hip. Dr. Morton uses a combination of x-rays, physical exam, and diagnostic injections to help you determine what is contributing to your pain.

You should consider having a hip replacement when your hip causes enough pain that prevents you from enjoying your life and you have failed nonoperative treatment.

Are you a candidate for an Anterior Hip Replacement?

In general, most patients may undergo hip replacement from both approaches. The anterior total hip surgery is less suitable for patients who are overweight or have already undergone other hip surgeries in the past. Patients who have a significant deformity of the hip joint or with health problems that may slow wound healing may also be at high risk for poorer outcomes with the anterior total hip replacement. Call Dr. Morton to set up an appointment if you would like to see if you are a candidate for the anterior hip replacement.

How do you get leg length measurement right during surgery?

Traditionally, many patients after the posterior total hip replacement complained of leg length inequality and pain to the outside of their hip.  Dr. Morton uses specialized tools such as x-ray during surgery to check leg-lengths intra-operatively.  Sometimes getting your leg lengths perfect can be harder to achieve during revision and deformity surgery.

During surgery, Dr. Morton also considers the offset of your hip. Offset is the measurement of how far your femur bone is from your pelvis bone.  The further away it is, the higher the offset.  A high offset can sometimes put increased pressure on the hip and cause pain. A low offset can cause an unstable hip.  Dr. Morton uses specialized tools to help figure out the appropriate offset of your hip. Talk with Dr. Morton about leg lengths and offset to understand how he will personalize placing your hip implant.

Six ways the Anterior Approach Improves on Hip Replacements

  • Soft-tissue sparing - less injury to the soft tissues
  • Minimally invasive - smaller incisions
  • Muscle sparing approach
  • Quicker Recovery
  • Less painful recovery
  • Lower risk of hip dislocation compared to the posterior approach
Biking after anterior total hip

Have Realistic Expectations

When deciding to have a hip replacement, you need to understand the limitations of your joint replacement surgery. Over 90% of people who have a total hip replacement have an incredible reduction in their hip pain and a dramatic improvement in returning to a better function. For most patients with normal use and activity, the hip replacement rarely wears out the plastic spacer. Dr. Morton likes to follow-up his patients on an annual basis with an x-ray to ensure that your hip replacement is continuing to function at the best of its ability. Increased activity or weight may speed up the wear and tear on your plastic components and may cause the hip replacement to loosen or become painful. After your recovery, you will feel like you can do many physical activities. The American Academy of Orthopaedic Surgeons advises our patients to avoid running, jogging, jumping or other high-impact activities with a hip replacement.

Consider the Risks Before Surgery

Total hip replacement surgery has a high success rate and is one of the most reliable surgeries in orthopedics. However, it is still a major surgery. As with any surgery, there are possible risks including but not limited to:

  • Blood clots such as a Deep Vein Thrombosis or Pulmonary Embolism
  • Blood loss that may require blood transfusion
  • Infection - one of the more severe complications that may require multiple operations
  • Implant loosening - Sometimes requires a revision replacement
  • Fracture - The implant changes the distribution of stress across the bone, which can predispose to broken bones
  • Dislocation - When the "ball pops out of the socket"
  • Leg-length inequality - Reduced utilizing special equipment during an anterior hip
  • Heterotopic ossification - A rare complication where the hip becomes increasingly stiff
  • Nerve or blood vessel damage - Extremely rare complications that can result in loss of function or loss of limb.

Dr. Morton will take great care to minimize the risk of complications.  Dr. Morton is happy to discuss any questions or concerns.

Related Pages

Total Hip Replacements - 6 Reasons Anterior Hip is Better 1
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Revision Total Hip Replacement Surgery Total Hip Replacements are an extremely successful procedure and allows many people to continue living

Frequently Asked Questions about Hip Replacements (FAQ)

How long does it take to recover from hip replacement surgery?

Hip replacement recovery is variable. Many patients are feeling good at 6 weeks. It may take 3 months to a year before you completely recover from your hip replacement. The anterior hip replacement consistently allows for a quicker recovery.

How painful is a hip replacement?

The arthritic pain from before surgery is usually removed following hip replacements. Many patients tell me they have minimal to no pain following surgery initially. Some patients have soreness for up to 2 months. Again, I have noticed that many patients have a lower amount of pain through the anterior approach.

What can I not do after a hip replacement?

We advise people who undergo a posterior hip replacement to avoid bending beyond 90 degrees, avoid crossing your legs, do not rotate your hip inwards. These precautions are used to avoid hip dislocations. Patients who undergo an anterior hip are usually not limited postoperatively. I do advise patients undergoing an anterior hip not to extend their hip significantly in certain extreme positions.

How long will I stay in the hospital?

Many patients are able to stay in the hospital overnight to recover and go home the next day. Very healthy patients may consider going home on the same day. Patient who require additional recovery may require extra days depending on their medical condition.

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Meet Dr. Paul N. Morton, MD

Dr. Paul N. Morton, MD is a fellowship-trained orthopedic surgeon in hip and knee surgery, specializing in robotic joint replacements, complex joint reconstruction, sports injuries, and trauma. Reach out to him to learn more about treatment options for your problem.

Written By: Dr. Paul N. Morton, MD


Post Published on October 17, 2018