Clinical Application of Octacalcium Phosphate/Gelatin Composite in Spherical Periacetabular Osteotomy: Two Case...

Autologous bone grafts remain the gold standard for bone defect repair but are limited by donor-site morbidity. Octacalcium phosphate/gelatin composite (OCP/Gel) has shown strong osteoconductivity and osteoinductivity in animal studies, yet clinical reports are lacking. Two patients with developmental dysplasia of the hip underwent spherical periacetabular osteotomy (SPO) using β-tricalcium phosphate (β-TCP) and OCP/Gel. In both cases, radiographic parameters improved, and complete bone union was achieved within six to eight months. OCP/Gel was fully resorbed and replaced by mature bone, while β-TCP remained partially unabsorbed. Both patients recovered uneventfully with stable correction. This is the first clinical report of OCP/Gel use in SPO. OCP/Gel promoted early bone remodeling and complete integration, suggesting it as a safe and effective bone substitute for reconstructive hip surgery.