United Orthopedic Corporation

5 Trial Reduction Based on the final reamer and broach size, select an appropriate Stem Trial for the preparation of femoral canal. If any resistance is felt as stem trial insertion, there may be a need for additional reaming or broaching to remove obstructing bone until the stem trial can be fully seated. Perform the trial reduction by using the femoral head trial with desired diameter and neck length. Any correct of selected implant size can be made during the assessment of leg length and joint biomechanics. Optionally, if a straight stem is selected, the surgeon may leave the final broach for trial reduction. 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 obtain a stable initial fixation.