Practical reading from Professor Paul Lee and the Lincolnshire Hip Clinic team — across hip replacement, Arthrosamid, ChondroFiller, PRP and the wider world of hip and groin pain.
An acellular collagen scaffold, injected under ultrasound guidance into focal hip cartilage defects, recruits the patient's own progenitor cells for repair; meaningful improvement occurs in 70–85% of cases.
ChondroFiller is a CE-marked injectable collagen scaffold that regenerates hip cartilage by providing a matrix for a patient's own cells; the NHS does not fund it due to lack of long-term trial data, but private treatment costs £2,800–£3,000 for younger patients with focal defects.
ChondroFiller Liquid is a collagen scaffold injected under ultrasound guidance into the hip joint; unlike lubricating injections, it recruits the patient's own progenitor cells to repair focal cartilage defects. In a prospective cohort of 26 patients with femoroacetabular impingement, 81 per cent reported good or excellent outcomes at three to five years.
Femoroacetabular impingement — where extra or misshapen bone reduces hip joint clearance — forces the joint to grind rather than glide, progressively damaging the labrum and cartilage; it is among the most common causes of hip pain in active adults under 50.
Pain from hip impingement suppresses gluteal strength; prehabilitation addresses this weakness before surgery, preventing compensatory movement patterns that would otherwise persist through recovery.
The hip preservation window—the period when cartilage repair and joint-protecting interventions remain viable—is shaped by three factors: cartilage loss, patient age, and activity demands. Position within this window matters more than age alone in determining whether joint replacement is necessary.
ChondroFiller is a collagen scaffold injected under ultrasound guidance into damaged hip cartilage to recruit the body's repair cells over three to twelve months — unlike steroid injections, it produces no immediate pain relief but requires six weeks of protected loading, with measurable results emerging at six to twelve months.
Hip replacement enters the conversation not at any fixed age or imaging threshold, but when pain persists despite genuine conservative treatment and restricts daily function.
Microfracture repair generates fibrocartilage that deteriorates within four years; AMIC uses a collagen scaffold to contain the repair clot and guide cells toward proper cartilage, sustaining benefit to seven years.
Lincolnshire Hip Clinic
Led by Professor Paul Lee
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