Distal radius fractures are one of the most common fractures in the elderly females. In this article, we report a case of a distal radius fracture type AO-A3 with dorsal instability, in an older woman with manifest osteoporosis, treated with minimally invasive Cortoss^® composite and FFS-wires®. A 63-year-old woman sustained an unstable distal radial fracture of her left wrist after falling from a kitchen step. She underwent an open reduction of the fracture and fixation with two crossed-fixation pins and Cortoss^® composite. Post-operative plaster cast immobilization was given for 2 weeks, after which the plaster cast and the fixation pins were removed. At 4 weeks follow-up, she had a good functional result of her left wrist, after 11 months there was a complete return of grip strength with also, except for the palmar flexion, a full return of function. We report here the first case of a successful surgical treatment with Cortoss^® composite of an AO-A3 type distal radius fracture.