The Hip Prosthesis I Use for Total Hip Replacements

Many patients ask detailed questions about the prosthesis used in their hip replacement — the implant itself, its features, available options, and considerations that guide my choice of prosthesis for each patient. Understanding what is being implanted helps you feel more confident about your surgery.

01 — Articulation: Ceramic on Ceramic

The Bearing Surface

In general practice, I prefer to use a ceramic-on-ceramic articulation for total hip replacements. Ceramics offer exceptional wear resistance and long-term durability. The bearing surface is highly polished and extremely smooth at a microscopic level, which reduces wear on the bearing components and extends implant longevity.

There are alternative articulation options available — such as ceramic-on-plastic or metal-on-plastic — which may be chosen in specific scenarios depending on patient age, bone quality, and individual circumstances. I will discuss the most appropriate option for your particular case.

"Ceramic-on-ceramic bearings offer the longevity and wear characteristics that give my patients confidence in their new hip."

— Dr Chien-Wen Liew

02 — Design & Fixation

How the Implant is Secured

Modern hip replacements use modular designs — the femoral head, stem, and acetabular cup are separate components that are assembled to achieve optimal positioning for your individual anatomy. This modularity allows precise size-matching to your unique bone geometry.

Fixation methods vary depending on bone quality and the specifics of your anatomy. Some implants are press-fit directly into bone using the patient-specific jigs I discussed earlier. Others may be cemented for additional security, particularly in cases where bone quality is compromised or the patient is older. I will determine the most appropriate fixation method during your pre-operative planning.

Watch — Dr Liew Explains

The Hip Prosthesis I Use for Total Hip Replacements

Watch Dr Chien-Wen Liew discuss this topic.

03 — Weight & Specifications

Understanding Your Implant

A standard hip replacement prosthesis weighs between 200–400 grams depending on the specific design and size. This weight is negligible compared to your body weight, and you will not feel any difference or heaviness from the implant. The femoral stem, acetabular cup, and articulation components are engineered to precise tolerances to ensure optimal function and longevity.

04 — Common Questions

Safety & Compatibility

Can I have an MRI with a hip replacement?+

Yes. Total hip replacements performed with my current technique and implant selection are fully MRI safe. If necessary, an MRI can even be performed of the hip replacement itself. There is no negative interaction between the implant materials and the magnetic field.

Will I beep at airport security?+

In most airports, yes — the sensitivity of metal detectors will typically detect the hip replacement. Simply advise security that you have a hip replacement, and they will usually conduct a pat-down or use a handheld wand. There is no card or letter that makes this process more convenient, but airport staff are accustomed to this situation.

What happens if my implant needs revision?+

Revision hip replacements are possible if needed, though they are more complex than primary surgery. The modular design of modern implants facilitates revision if ever required, though the goal is always successful long-term function without revision.

How long does the prosthesis last?+

Modern hip replacements have demonstrated excellent longevity in rigorous registry studies. The Australian registry shows approximately 92% survival at 20 years. Many implants last 25–30 years or longer with appropriate care and activity modification.

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A comprehensive guide to hip implants, materials, and what you should know before surgery.

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Medical Disclaimer: This content is for educational purposes only. Individual outcomes vary. AHPRA Registered Specialist.