The study is designed to be prospective to ensure that the study population is representative of the type of population that the device is intended to treat. Patients will be selected according to the subject selection criteria described in section 8. All subjects will undergo preoperative, intraoperative and immediate postoperative assessments including physical examinations, radiographic evaluations and collection of quality of life metrics. Follow-up evaluations are to be conducted at 3 and 6 months, 1, 2, 5, 7 and 10 years postoperation.