Minimally Invasive Total Hip Replacement

A minimally invasive hip replacement is the same operation as a standard hip replacement, just done through a smaller cut and with less disturbance to the surrounding muscles. The hip replacement implants that go in are identical to the ones used in traditional surgery.

The difference is the technique and the special instruments that let the surgeon work through a narrower opening. The payoff can be a smaller scar, less blood loss, and a quicker recovery. The trade-off is that working through a smaller window is more demanding and isn’t the right choice for everyone.

In fact, this technique is best suited to a fairly specific group of patients, and the traditional approach remains the proven, reliable standard.

This page explains who’s a good fit, how it differs from standard surgery, and the pros and cons.

What condition does this treat:

Like any hip replacement, this treats advanced hip arthritis. This is where the smooth cushioning in the joint has worn away, the bones rub together. The hip is painful and stiff enough to interfere with daily life.

The surgery removes the worn ends of the bones that form the hip and exchanges them with metal and plastic parts that functionally recreate how a healthy joint moves.

When should you consider surgery:

As with any hip replacement, surgery is for when non-surgical treatments haven’t given enough relief and arthritis is seriously affecting your life.

The minimally invasive version is suitable for a narrower group of people. It tends to work best for someone who needs a first-time (not a revision) hip replacement, is relatively younger and active, has a thinner build, and has fairly normal hip anatomy. It’s generally not recommended for:

• People needing a repeat (revision) or complex hip surgery, which requires a wider view of the joint.
• Anyone who’s had previous surgery on that hip or thigh (like prior bone repairs with screws or plates).
• People who are heavier, very muscular, or managing several other health conditions.
• People with weak or diseased bone (such as osteoporosis), inflammatory arthritis like rheumatoid arthritis, bone tumors, or severe hip stiffness or deformity.

If you fall outside the ideal group, a traditional hip replacement is usually the safer, more effective choice. Your surgeon will help you decide.

What happens during surgery:

The actual steps are the same as a conventional hip replacement. The surgeon removes the worn ball at the top of the thigh bone, smooths and fits a cup into the socket (press-fit or cemented), places a stem into the thigh bone, attaches a new ball, and fits it into the new socket.

The difference is the access. A traditional hip replacement uses a cut roughly 10 inches long. The minimally invasive version uses one about half that size. The surgeon can use this technique from the front, back, or side. In some cases they use two small cuts instead of one.

Here there is one in the front to work on the socket and one in the back to work on the thigh bone. Special instruments help them do all this through the smaller opening.

Have a look at our total hip replacement page to get an idea of the detailed steps of a hip replacement. These are similar between the two techniques.

X-ray showing a lateral view of a total hip replacement.

What does recovery look like:

This is where minimally invasive surgery has its main appeal. Because fewer tissues are cut and the incision is smaller, people often have less blood loss during surgery, a smaller scar, and a quicker recovery afterward. The technique also tends to preserve the muscles on the side of the hip that are important for walking normally.

As with any hip replacement, recovery still centers on physical therapy to rebuild strength and movement, and your surgeon will set a timeline based on your health and how the surgery went.

What are the major risks and complications:

Beyond the usual risks of any hip replacement (like infection and blood clots), this technique has some risks tied specifically to working through a small opening:

• Less visibility for the surgeon. With a smaller window, there’s a greater chance the parts could end up slightly out of position. This ideal positioning is what keeps the new hip stable and prevents it from slipping out of place.
• Stress on the skin and tissue. The instruments have to push harder against the edges of the smaller incision, which can put extra strain on the skin and lead to wound-healing problems.
• Nerve injury. The tight working space raises the chance of irritating or damaging nearby nerves.
• A bone fracture during surgery.

This is part of why the technique demands extra training and careful patient selection.

What if you don’t have surgery:

Surgery isn’t mandatory, and many patients manage hip arthritis for a long stretch with medication, physical therapy, and injections. But arthritis tends to keep progressing. The joint generally wears down further over time. Thus, for many patients the pain and stiffness slowly worsen and everyday activities get harder.

Non-surgical care eases symptoms but doesn’t fix the underlying problem. Also, keep in mind this is just one technique for hip replacement, not a separate decision about whether to have one. If you do choose surgery but aren’t a good candidate for the minimally invasive approach, a traditional hip replacement is a well-proven, highly successful option.

Which path makes sense is a conversation to have with your surgeon based on your symptoms, your anatomy, and how much your hip is affecting your life. Discuss this with your surgeon, and we can decipher the best option for you.