Uncemented Hip Replacement with OPS Technology

What is it?

An uncemented (cementless) hip replacement uses an implant designed to bond directly to your natural bone over time — a process called osseointegration. Rather than fixing the implant with bone cement, the surface of the prosthesis is specially coated or textured so that bone grows into it, creating a highly durable, long-lasting bond.

The implant used in this practice is the Corin Metafix Trinity — a proven uncemented system combining a cementless femoral stem with a hemispherical acetabular cup, designed to restore normal hip biomechanics as closely as possible.

What is OPS (Optimised Positioning System)?

Every patient's pelvis moves differently — when you sit, stand, or bend forward, your pelvis tilts by a unique amount. This pelvic movement directly affects how your hip replacement socket should be angled in order to prevent dislocation and achieve the best long-term function. The Optimised Positioning System (OPS) is a Corin technology that accounts for your individual movement pattern.

• Pre-operative imaging: standard X-rays and a CT scan are sent to a specialist engineering team.
• Dynamic analysis: specialist software analyses how your pelvis and spine move together — your unique 'spinopelvic profile'.
• Personalised surgical plan: a detailed digital plan with the optimal cup orientation and size, specific to you.
• 3D-printed guides: custom guides are manufactured to position the cup precisely according to the pre-operative plan.

Who is this for?

• Patients with osteoarthritis, avascular necrosis, or inflammatory arthritis of the hip
• Younger or more active patients who would benefit from a bone-conserving, cement-free fixation
• Patients with complex anatomy or a high risk of dislocation who will benefit from personalised cup positioning
• Patients fit enough for surgery under general or spinal anaesthesia

My approach

• Posterior approach for excellent visualisation of the joint
• Sciatic nerve identified and protected throughout the procedure
• Anatomy restoration: natural leg length and hip offset preserved
• Corin OPS planning with patient-specific 3D-printed cup guide
• Available at: Meriden Nuffield Health Hospital and University Hospitals Coventry & Warwickshire

Risks

• Dislocation
• Leg length discrepancy
• Injury to nerves and vessels
• Deep vein thrombosis (DVT) and pulmonary embolism (PE)
• Further surgery
• Failure of the implant
• Infection
• Fracture

Recovery

• Most patients are mobilising on the same day or the day after surgery
• Hospital stay: typically 1 day
• Crutches or a walking aid for around 4 weeks
• Return to driving: approximately 6–8 weeks
• Full recovery and return to most activities: 3 months