Hip Hemi‐Resurfacing With 3D‐Printed Titanium Mini‐Prosthesis: A Case Report

Background Hip degeneration in young patients poses a significant clinical challenge, especially when the acetabulum remains intact. Total hip arthroplasty (THA) is often postponed in these patients due to concerns about implant longevity and multiple revisions. Joint‐preserving alternatives are therefore crucial. Case Presentation We present the case of a 29‐year‐old male with progressive left hip pain and limited mobility. Imaging revealed a large subchondral cyst and structural alteration of the femoral head, while the acetabular cartilage appeared preserved. The patient′s preoperative Harris Hip Score (HHS) was 80, indicating poor joint function, and the preoperative WOMAC score of 20 reflected moderate pain and functional limitation. Considering the location and depth of the lesion, conservative and biological options were excluded. A custom‐made 3D‐printed hemi‐resurfacing mini‐prosthesis in titanium was designed based on CT imaging. The implant was inserted using a minimally invasive anterior approach and patient‐specific surgical guides. Results After 3 years of follow‐up, the patient demonstrated excellent clinical and radiographic outcomes, with significant pain reduction, improved function (HHS improved to 94, and WOMAC improved to 4), and no signs of implant loosening or joint deterioration. Conclusion This case highlights the potential of personalized, 3D‐printed mini‐prostheses as a viable bone‐preserving alternative to conventional joint replacement in young patients with focal femoral head pathology.