United Orthopedic

United Orthopedic U2 Revision Stem 5 6 When the final broach is seated, utilize the Calcar Reamer and guide the reamer over the Broach trunnion ensuring that the Calcar Reamer is axially aligned with the trunnion and is stable. Calcar Preparation Instruments C. Select the appropriate StemTrial for the preparation of femoral canal. If any resistance is felt during stem trial insertion, there may be a need for additional reaming or broaching to remove obstructing bone until the StemTrial can be fully seated. Perform the trial reduction using the Femoral HeadTrial with desired diameter and neck length. If required, any correction of selected implant size can be made during the reassessment of leg length and joint biomechanics. Optionally, if a straight stem is selected, the surgeon may leave the final broach for trial reduction. Trial Reduction Instruments D. Revision Hip Stem Broach Revision Hip Stem Broach Revision Hip Stem Trial Calcar Reamer Note: To prevent destruction of the press-fit mechanism, the dimension of stem trial is reduced by 0.2 mm in diameter when compared with the size matched broach. As shown below, the U2 revision hip instrumentation design provides a 0.5 mm interference between the real implant and the broach to enable stable initial fixation. Neck Trial Femoral HeadTrial Size comparison Size Comparison Implant Implant Broach Broach Trial Trial 0.5 mm 0.5 mm 0.7 mm 0.7 mm