Unique® individually designed femoral stems are designed with two main features: • Optimal primary stability and physiological load transfer for long-term survival • An optimized neck design in order to adjust for any abnormalities of the hip geometry, and to provide optimal post-operative biomechanics of the hip joint. Thus ensuring the best hip function for the patient. Intra-medullar design The design of the intra-medullar part is based on CT- scans of the patient's hip and thigh. The aim of the design is to achieve contact between the implant and the endo-cortical bone in the following target areas of the femur: • Proximal medial • Proximal anterior • Lateral flare • Proximal posterior, immediately distal of the resection. A perfectly fitted stem The design is modified in order to ensure easy insertion for safe implantation, but still achieve contact of up to 50 – 60 % to endo-cortical bone. The corresponding contact are for standard non-cemented prostheses are 10 – 20 %. The distal part of the Unique stem is scaled down to prevent contact with the endo-cortical bone. This ensures that the surgeon can obtain maximum primary stability of the implant for long-term survival of the implant. With a physiological load transfer, the surrounding bone is also stimulated to regenerate healthy bone cells. Extra-medullar design The design of the extra-medullar parts of the implant is decided inter-actively between our engineers and the surgeon via our patented internet surgical planning solution (uniqueNet) - with the surgeon in command! The individual planning and design of the neck gives the surgeon the possibility to optimize the extra-medullar geometry. Based on accepted and documented biomechanical and functional principles, we correct for – and optimize – many biomechanical conditions: • Optimisation of medial and anterior offset. • Correction of leg length differences • Optimization of anteversion • Correction for necessary relocation of acetabular component For the patient, this offers the advantage of a well functioning hip after surgery. For the surgeon, difficult surgery in patients with various abnormalities of the hip geometry may be performed with thorough planning and without the need for correctional osteotomies. Who will benefit from Unique Surgeons using Unique regularly recommend this solution especially for two groups of patients: • Young and active patients requiring high functionality and long-term survival of their prosthesis. • Patients with various deviations in hip geometry or other abnormalities. Young and active patients will benefit from our optimalisation of the biomechanics of the hip. For this patient group it is important that they after surgery can return to their normal, active lifestyle – without risking strained muscles and tendons. They will also benefit from long life-expectancy of the implant as a result of the maximum primary stability achieved. Patients with various deviations and abnormalities in their joint. Such deviations often come as a result of • Hips dysplasia • Rheumatoid Arthritis • Avascular necrosis • Calvé-Leg Perthes • Post traumatic indications By designing the neck to compensate or correct for this abnormalities, there will be no need for additional osteotomies. Some surgeons use the Unique stem in connection with shortening and rotational osteotomies in order to obtain a good result in extreme cases.