Trochanteric Femur Fracture Operated With Dynamic Hip Screw System (DHS) Augmented With a Biphasic Apatite Sulphate Combined With Systemic or Local Bisphosphonate

Inclusion Criteria: * Patients 65-90 years of age; * Fame classification with low mortality and high fracture risk. * Unilateral proximal hip fracture ((AO Foundation/Orthopaedic Trauma Association (AO/OTA): A1 and A2)) caused by low energy trauma (physical condition eligible for surgery with dynamic hip screw); * Patient with a communicative ability to understand the procedure and participate in the study and the follow-up program. Exclusion Criteria: * Previous hip or pelvic fractures on the same side, * Concurrent oral treatment with corticosteroids, and/or osteoporosis medication * Irreversible coagulopathy or bleeding disorder. Note regarding reversible coagulopathies: Patients on coumadin or other anticoagulants may participate. Investigators should follow routine practices for perioperative discontinuation and re-initiation of anticoagulants; * Concurrent dialysis or elevated creatinine * Hypo or hyper calcaemia * Active treatment due to malignancy including ongoing or completed radiotherapy involving the pelvis/hip area, * Fractures involving acetabulum * Active systemic infection or local skin infection at the incision site * Known hyperthyroidism or thyroid adenoma, * History of serious reaction to iodine based radio contrast agents