When hip replacement becomes a sensible next step

Hip replacement becomes a sensible next step when hip pain, stiffness and loss of movement have become life-limiting despite sensible non-operative care. The NHS describes surgery as worth considering when symptoms have a "big effect on life" and other treatments have not worked. In practice, that often means the hip is disturbing sleep, cutting walking distance, making shoes and socks hard to manage, reducing independence at home, or forcing someone to stop work, exercise or hobbies because the joint is no longer coping.

The decision is not simply "pain equals surgery". NHS inform notes that X-ray change and symptoms do not always match, so patient suitability depends more on function, day-to-day restriction and confirming that the hip joint is truly the source of pain than on scan findings alone. Lincolnshire Hip reflects that order of thinking: Prof Paul Lee’s approach is to judge whether replacement is justified first, then make a balanced comparison of techniques such as SPAIRE hip replacement, a muscle-sparing posterior approach, against other surgical options if an operation is the right stage.

Who is likely to be a good candidate

At this stage, the practical question is candidacy rather than clinic logistics. NHS guidance points towards hip replacement when pain and stiffness have a big effect on daily life and simpler treatments have not worked, but age alone is a poor shortcut. A person in their 50s whose hip joint now limits walking, sleep, work and basic tasks every day may be a better candidate than someone 20 years older whose symptoms are still intermittent and manageable. On Lincolnshire Hip, Prof Paul Lee describes SPAIRE hip replacement as a muscle-sparing posterior approach, but any balanced comparison of techniques comes after patient suitability for hip replacement itself is clear.

Practical suitability also depends on whether recovery looks realistic. Smoking, poorly controlled diabetes, higher body weight, weaker muscles around the hip, reduced bone quality, limited help at home, or difficulty engaging with physiotherapy may all affect timing, risk and preparation. NHS recovery advice says most patients start walking early, often go home in 1 to 3 days if safe, and usually need crutches or a frame at first; AAOS discharge goals also include transfers, stairs and home exercises. If hip pain still flares only occasionally, or remains manageable with exercise therapy, pain relief, activity changes or selected injections, more non-operative treatment may still be the better stage before surgery.

How SPAIRE compares with other hip replacement approaches

Set aside referral routes and clinic locations for a moment: the practical difference between hip replacement approaches is which soft tissues are disturbed to reach the hip joint. SPAIRE hip replacement sits within the posterior family, but it is designed as a muscle-sparing posterior approach that preserves the small posterior rotator tendons rather than routinely taking them down. Since SPAIRE was first described in 2016, the idea has been to support stability and earlier mobilisation by keeping more of the hip’s natural stabilisers intact.

That makes SPAIRE different from a standard posterior approach, even though both come in from the back of the hip. Historic concern about posterior dislocation helps explain why tendon-sparing variants attract interest: in a Swedish cohort of 25,678 hemiarthroplasties, dislocation was 7.2% with a posterior approach versus 2.7% with a direct lateral approach. SPAIRE is trying to address that concern by preserving posterior tissues, although the strongest published data so far still comes more from hemiarthroplasty and hip-fracture settings than from routine elective total hip replacement. A 2025 systematic review found short-term benefits such as earlier mobility and less pain, but broadly similar longer-term outcomes.

Against direct anterior replacement, the trade-off is slightly different. Randomised-trial evidence suggests anterior surgery may improve very-early function and shorten hospital stay a little in some studies, but it usually takes longer to perform and has not clearly shown better major-complication rates than posterior or lateral approaches overall. A separate multicentre randomised trial likewise found similar pain, length of stay, implant position and complications between anterior and posterior surgery, with only a trend towards better early function in the anterior group.

The plain-language bottom line is that SPAIRE seems most attractive when early confidence, soft-tissue preservation at the back of the hip, and stability are priorities. Lateral approaches may appeal when stability is emphasised, but they reach the joint through a different side-tissue route. At Lincolnshire Hip, Prof Paul Lee frames this as a balanced comparison based on patient suitability: SPAIRE is a credible option, not a proven best approach for everyone.

When SPAIRE may or may not suit you

In the 2024 source behind current SPAIRE guidance, the key question is not whether the technique sounds appealing but whether the hip joint can be reached comfortably enough for the operation planned. SPAIRE hip replacement is a muscle-sparing posterior approach, so it may suit a straightforward primary replacement where tissue preservation and early mobility are priorities. The clearer maybe-not-SPAIRE bucket is the technically awkward hip: small anatomy, reduced femoral offset, or an external rotation deformity are all listed as situations that may make SPAIRE more challenging, and in those cases better exposure may matter more than the tissue-sparing idea.

The evidence base also needs keeping in proportion. Published SPAIRE results are promising, but much of the data still comes from hemiarthroplasty and hip-fracture practice rather than routine primary osteoarthritis total hip replacement, and the HIPSTER trial is still studying tendon-sparing versus standard posterior THA. The sources provided here do not quantify every scenario, including how previous hip surgery changes patient suitability, so those decisions remain case-specific and tied to anatomy, implant requirements, and what gives reliable visualisation.

For Lincolnshire Hip, the more useful takeaway is therefore quite concrete. In the balanced comparison reflected across its SPAIRE pages, and in the consultant perspective associated with Prof Paul Lee, SPAIRE hip replacement is one option when a muscle-sparing posterior approach fits the individual hip joint and the surgical plan; if exposure looks constrained, another approach may be the better match.

What recovery usually looks like after surgery

Early recovery is usually functional rather than dramatic. NHS guidance says people are helped to start walking as soon as possible after hip replacement, commonly with crutches or a walking frame at first, and many go home in 1 to 3 days once it is safe. Before discharge, common goals include getting in and out of bed, acceptable pain control, walking with an aid, managing stairs, doing home exercises, and understanding any hip precautions given by the surgical team.

What to ask at your consultation

For a hip consultation about SPAIRE hip replacement or standard replacement, the most useful structure is usually a short checklist linked to diagnosis, patient suitability and recovery.

• Is the pain definitely coming from the hip joint, and do symptoms, examination and scans all point to the same diagnosis?
• Has the point been reached where hip replacement is reasonable now because pain and stiffness are affecting daily life, or is there still a sensible non-operative step?
• If surgery is being discussed, what is the balanced comparison: why is this approach more suitable than anterior, lateral or standard posterior surgery for this hip?
• Is SPAIRE hip replacement relevant here as a muscle-sparing posterior approach, or do anatomy and surgical exposure make another option more reliable?
• What early recovery is realistic in this case: walking aids, physiotherapy support, key risks, and likely timing for driving, work and sport?

Lincolnshire Hip is part of the MSK Doctors group; assessments with Prof Paul Lee can be booked without GP referral, with local access in Sleaford and Grantham. The useful end point is a clear explanation of diagnosis, risk and next step, rather than a generic preference for any one approach.

1. [1] Comparing direct anterior approach versus posterior approach or lateral approach in total hip arthroplasty: a systematic review and meta-analysis. (2023). https://doi.org/10.1007/s00590-023-03528-8 https://doi.org/10.1007/s00590-023-03528-8