‘bikini' Incision Hip Replacement | Dr Williams

A ‘bikini’ incision hip replacement is a variation of anterior approach hip replacement surgery. The term “bikini” refers to the direction and position of the skin incision, not to a different type of hip implant. The incision is placed parallel to the natural skin crease at the front of the hip (the groin crease), similar to the bikini line. The main advantage of this technique is that the incision follows the natural tension lines of the skin (Langer’s lines), which usually results in a very cosmetically pleasing scar that is often covered by swimwear or underwear. From a surgical perspective, the hip replacement itself is the same as a standard anterior hip replacement using a vertical incision. Below the level of the skin incision, the muscle-sparing approach, steps of the operation and implants used are exactly the same as the standard technique.

Who is Suitable for ‘Bikini’ Incision Hip Replacement?

Most patients who are suitable for an anterior approach hip replacement are also suitable for a bikini incision hip replacement. The incision is less ‘extensile’, however, and Dr Williams may therefore recommend the standard vertical incision in cases where a more extensive exposure is required, such as male patients with well-developed musculature or patients with atypical anatomy. The bikini incision is also less suitable for patients having revision ‘re-do’ surgery. The most important thing is to ensure safety, accurate implant placement, and favourable long-term outcomes.

Patients who may be suitable include:

Patients with hip arthritis: Osteoarthritis, inflammatory arthritis, or avascular necrosis, causing significant pain and reduced mobility that has not responded to maximal non-operative management.
Patients with straightforward hip anatomy: No major deformities or previous hip surgeries
Patients concerned about scar appearance: As hip replacement patients become younger and more active, scar cosmesis is often more of a consideration.

Patients who may not be ideal candidates include:

Patients with severe obesity: Severe obesity increases the risk of any joint replacement, mainly due to the increased risk of infection. If there is an active skin infection in the groin crease, anterior approach hip replacement using either a vertical or bikini incision should be delayed until the infection can be cleared, or an alternative approach should be used. If the skin is healthy, however, Dr Williams actually prefers to use a bikini incision in larger patients as this has been shown to reduce wound complications as the incision does not cross the groin crease.
Patients with complex hip deformities: Such as severe dysplasia, childhood Perthes disease or previous fractures
Patients needing revision surgery: Scar tissue and altered anatomy may make a standard anterior approach or a posterior approach more suitable.

Benefits of ‘Bikini’ Incision Hip Replacement

The bikini incision technique offers several potential benefits, many of which overlap with those of the anterior approach and add cosmetic advantages.

Smaller, discreet scar: The incision lies within a natural skin crease, often making it less noticeable once healed
Muscle-sparing approach: Surgery is performed through a naturally occurring interval between muscles rather than needing to split or cut any muscles.
Reduced post-operative pain: Less muscle trauma may lead to lower pain levels
Fast early recovery: Many patients mobilise on the day of surgery
Improved hip stability: Lower risk of dislocation due to preserved muscles
No traditional hip precautions for many patients: Such as avoiding bending beyond 90 degrees or crossing legs. Patients may also sleep in any comfortable position after their surgery.
Potential for shorter hospital stay: Most patients are discharged home after 2 nights or, in some cases, as early as the next day.

It is important to note that long-term outcomes depend more on implant positioning, surgical technique, and patient factors than on incision type alone.

Alternative Options to ‘Bikini’ Incision Hip Replacement

The bikini incision approach is only one of several surgical options for hip replacement.

Alternative surgical approaches include:

Standard anterior hip replacement: Similar muscle-sparing technique with a vertically oriented incision. The standard vertical incision can actually be shorter in length and is also a very discreet scar.
Posterior approach hip replacement: Traditional and widely used approach from the back of the hip. Dr Williams is well-trained in this approach and uses it for revision cases or in other select cases.
Lateral (anterolateral) approach: Access through the side of the hip, splitting the gluteal muscles. Dr Williams only uses this approach if the gluteal muscles are already badly torn and require repair at the same time as hip replacement.
Mini-posterior approaches: there have been various modifications to the standard posterior approach in an attempt to reduce dislocation rates and soft tissue trauma. These include certain named approaches such as SuperPATH, the Direct Superior Approach, and the SPAIRE (Spare Piriformis And Internus, Repair Externus) approach. While good results can be had with all approaches done well, Dr Williams prefers the anterior approach for its reproducibility in his hands.
Hip resurfacing arthroplasty: this alternative to total hip replacement may be suitable for younger (under 55) and more active patients. In this procedure, the socket is replaced in much the same way as a total hip replacement, but the femur is ‘resurfaced’ with a metal or ceramic ‘cap’ rather than removing and replacing the whole femoral head (ball). A potential advantage of this is that it preserves bone ‘stock’ in young patients who may require revision surgery in the future. Hip resurfacing is most commonly performed through an extensile posterior approach.

Non-surgical alternatives may be considered before surgery:

Physiotherapy: Strengthening and mobility programs
Pain management: Anti-inflammatory medications or injections
Activity modification: Reducing high-impact activities
Weight management: Reducing joint load
Walking aids: Canes or walkers to improve mobility

For some patients, hip-preservation surgery or joint injections may delay the need for replacement, particularly in early-stage disease.

Additional Considerations and Surgeon Experience

While the bikini incision hip replacement can offer excellent outcomes, it is a technically demanding procedure. Surgeon experience is one of the most important factors influencing results. Dr Williams has undertaken extensive additional training in bikini incision hip replacement and performs the technique regularly with high rates of clinical success.

Key points to consider:

Accurate implant positioning is critical
Nerve protection is essential due to nearby sensory nerves; however, some numbness below the incision is common
Not all surgeons offer this technique
Cosmetic benefits should not outweigh safety considerations

In some cases, a standard anterior incision may provide equally good functional results and be more appropriate in some patients.

Preparation Before a ‘Bikini’ Incision Hip Replacement

Before surgery, patients are usually guided through a structured pre-operative program.

Medical assessment: During your consultation, Dr Williams will take a thorough history of your hip symptoms, how they are impacting your quality of life, and your long-term goals. He will also complete a physical examination of your hip, being careful not to cause undue discomfort. Your medical history will also be assessed, including any regular medications, medical diagnoses and past surgeries.
Referral to other specialists: If indicated, Dr Williams may refer you for further assessment by a perioperative physician or cardiologist to make sure surgery is as safe as possible.
Routine pathology tests: All patients require some standard blood tests, which can be done at a local pathology collection centre. Skin swabs will also be performed to assess for skin colonisation with Staphylococcus aureus, which increases the risk of surgical infection and can be treated before surgery.
Imaging and planning: Dr Williams uses functional X-rays in the standing and sitting positions and three-dimensional CT scans to assess each patient’s hip anatomy and plan accurate implant positioning.
Medication review: Some medications, including blood thinners and certain supplements, may need to be stopped or adjusted.
Weight and fitness optimisation: Maintaining a healthy weight and improving leg strength can reduce complications and speed recovery.
Pre-habilitation physiotherapy: Learning exercises before surgery helps patients move more confidently afterwards, and strengthening the non-operative leg is useful to support the operated side. Dr Williams acknowledges that many patients requiring hip replacement surgery are in severe pain; however, formal preoperative prehabilitation may not be possible.
Smoking cessation: Smoking increases infection and wound-healing risks and should be stopped well before surgery. Smoking should not be replaced with other forms of nicotine delivery, as these can also increase risks. Dr Williams encourages patients to use their surgery as motivation to stop smoking for good.
Home preparation: Arranging support from family or friends, removing trip hazards, and preparing a comfortable recovery space are important.
Education: Understanding the procedure, hospital stay, and recovery expectations reduces anxiety and improves outcomes

Patients are also advised to:

Arrange transport home
Organise help with daily activities for the first 1–2 weeks
Prepare loose clothing that avoids pressure on the incision area

‘Bikini’ Incision Hip Replacement Procedure

A bikini incision hip replacement is performed under general and/or spinal anaesthesia. The operation typically takes one to two hours, depending on anatomy and complexity.

Key steps during the procedure include:

Positioning: The patient lies on their back, allowing accurate leg length and intraoperative x-ray checks
Skin incision: A 6-10cm incision is made just below the natural groin crease at the front of the hip
Muscle-sparing access: Dr Williams works between muscles rather than cutting through them
Joint exposure: The hip joint is carefully exposed while protecting surrounding nerves and blood vessels
Removal of damaged bone: The worn ball and socket surfaces are removed
Implant placement: The artificial socket, liner, stem, and ball are positioned with precision using intraoperative X-ray assessment
Stability and movement testing: The hip is tested through a full range of motion
Closure: The wound is closed in layers to support neat scar healing. Dr Williams uses dissolvable sutures beneath the skin and surgical glue for the final layer, so no sutures or staples need to be removed.

The bikini incision does not change the implants used. It only alters the direction and placement of the skin incision.

What to Expect After a ‘Bikini’ Incision Hip Replacement?

Recovery after a bikini incision hip replacement is often more comfortable in the early stages than with traditional approaches, but healing still occurs in phases.

Immediately after surgery:

Patients are monitored in recovery and then transferred to the ward
Pain is controlled with medications
Most patients stand and walk with assistance on the same day or the next morning

During hospital stay:

Hospital stay is often 1–3 days, depending on progress
Physiotherapists assist with walking, stairs, and basic exercises
Patients learn how to protect the incision and move safely

First few weeks at home:

Walking aids may be needed briefly. For most patients, Dr Williams recommends using 2 crutches for 2 weeks, followed by a single crutch or walking stick until gait is steady.
Daily activities usually improve steadily.
The surgical dressing should be kept clean and dry. It is waterproof enough for showering but not for submersion. It should not be removed or changed until 12-14 days post-op unless discussed with Dr Williams.
Swelling and bruising around the groin and thigh are common. There may be some numbness on the outer thigh, which improves over time.

Activity recovery:

Driving an automatic car is often possible within 2–4 weeks, depending on whether the left or right hip has been replaced.
Office-based work may resume within 2–6 weeks
Light exercise and walking are encouraged early
High-impact activities and exercise are delayed until the bone is securely bonded to the implants, which can take 3-4 months.

Many patients appreciate that:

There are no prescribed movement restrictions
Sitting, dressing, and walking feel easier earlier
The scar is less visible once healed

‘Bikini’ Incision Hip Replacement Outcomes

The long-term outcome after a bikini incision hip replacement is generally excellent when performed in the appropriate patient by an experienced surgeon.

Expected outcomes include:

Significant pain relief
Improved mobility and walking ability
Restoration of daily function
High patient satisfaction - approximately 95% according to the Australian joint replacement registry.

Prognosis depends on:

Implant positioning
Bone quality
Overall health
Rehabilitation commitment

Most modern hip replacements last 15–25 years or longer, regardless of incision type. Some patients will require a revision procedure in the future, with the top reasons for revision being loosening of the implants from bone, infection, fracture and repeated dislocation. Compared to the posterior approach, the anterior approach is associated with a slightly reduced rate of revision for dislocation and infection and a slightly higher rate of revision for loosening.

Younger and active patients often benefit from:

Strong muscle preservation
Faster confidence in movement
Early return to normal routines

‘Bikini’ Incision Hip Replacement Risks

Although generally safe, bikini incision hip replacement carries risks similar to those of other hip replacement techniques and involves approach-specific considerations.

General risks of hip replacement include:

Loosening (debonding of the implants from bone over time)
Fracture
Infection
Dislocation
Leg length discrepancy
Injury to nerves and blood vessels
Medical complications such as deep vein thrombosis, pulmonary embolism, allergic reactions to anaesthetic, heart attack, stroke and even death.

Approach-specific risks include:

Temporary numbness: Due to irritation of the lateral femoral cutaneous nerve near the incision. This does not affect hip function and usually improves over the first 6-12 months. Whether the bikini incision has an increased risk of numbness compared to the standard vertical anterior incision is a matter of debate in the scientific literature.
Fracture during surgery: The risk of fracture during a bikini incision hip replacement is no greater than with other approaches and is quite rare, at less than 1%. If a fracture of the shaft of the femur does occur, an additional incision on the side of the thigh may be required to repair it.
Infection and wound issues: In Dr William’s experience, the bikini incision is not associated with an increased rate of wound issues compared to the standard approach, which is also supported by many scientific papers.

Most nerve-related symptoms are:

Mild
Sensory only
Temporary

Choosing an experienced surgeon significantly reduces these risks.

How do I know if I’m Ready for a ‘Bikini’ Incision Hip Replacement??

The timing of hip replacement surgery is a very individual decision. Unlike surgery to fix broken bones or to remove a cancer, there is usually no urgency to performing total hip replacement, as hip osteoarthritis is usually a slowly progressive, chronic condition. There are a few exceptions to this, such as when total hip replacement is needed urgently for a traumatic fracture or rapid collapse due to avascular necrosis (when the blood flow to the ball of the femur has been compromised).

As hip replacement is a ‘quality of life’ operation, Dr Williams sees his role as a facilitator to help you make an informed decision about when to proceed, once you are fully educated about the risks and benefits of the procedure.

It is rare that delaying the procedure leads to a worse long-term outcome, though there may be certain instances where Dr Williams would recommend earlier surgery, particularly if there are large bone cysts at risk of collapse, or the severity of the arthritis is causing frequent falls.

Osteoarthritis is generally a fluctuating condition with good patches and bad patches, though it generally deteriorates over time.

Patients living with hip osteoarthritis long-term may experience :

Worsening pain: Pain may become constant and interfere with sleep
Reduced mobility: Walking distance and daily activity decline
Muscle weakness: Reduced use leads to muscle wasting
Joint stiffness: Making surgery and recovery slightly more difficult
Mental health impact: Chronic pain can affect mood and confidence
Compensation injuries: Strain on the opposite hip, knees, or lower back

However, surgery should only proceed when:

Non-surgical treatments are no longer effective
The patient is medically optimised
The benefits clearly outweigh the risks

‘Bikini’ Incision Hip Replacement

What is ‘Bikini’ Incision Hip Replacement?