United Orthopedic

United Orthopedic U-Motion II Cup 4 5 Three cup configurations are available in U-Motion II System: cluster-hole, multi-hole, and no-hole. The surgeon can select the appropriate cup configuration depending on the patients’ anatomy. Proper implant orientation can be guided by the external alignment system. The U-Motion II alignment system assists in directing a satisfactory level of acetabular cup abduction and anteversion. Attach the quick connect Alignment Tower to the cup impactor and thread the Alignment Rod into left/right screw hole of the tower. Firmly secure the acetabular cup onto the tip of the U-M II Cup Impactor . Following the abduction and anteversion angle during the cup trialing, place the implant into the acetabulum. If using a cluster-hole cup, for a correct orientation, care should be taken with regards to the screw hole placement superoposteriorly and/or inferoposteriorly. The laser marks on the rim of the cup indicate the position of screw holes. Caution: When a ceramic liner is used, cup abduction should not be greater than 45° (approximately 40° is recommended). In addition, the anteversion angle should lie between 10° and 20° in order to reduce the risk of impingement. Cup Orientation Instruments C. Once a proper acetabular cavity is established, place an Acetabular CupTrial to : (1) confirm the bone-implant congruency via the apical hole on the trial (2) verify the prepared acetabulum is truly hemispherical (3) check the stability of the trial cup before final implant insertion Before trialing, clean acetabular cavity and excise any protruded tissues. Follow the abduction angle and anteversion angle which are evaluated during templating to place the cup trial. Generally, control the cup trial to be inserted with a 40°-45° abduction and a 15°-20° anteversion. Impact the cup trial into the cavity with a mallet. Palpate the peripheral edge of the cup trial to ensure it is fully seated at an appropriate orientation. Thread the appropriate cup trial onto the U-M II Cup Impactor . The same diameter trial of the last reamer is recommended to avoid destruction during press-fit procedure. The profile of the cup trial is characterized as a true hemisphere corresponded to the marked diameter. CupTrialing Instruments B. Acetabular CupTrial Acetabular CupTrial Alignment Tower, lateral U-M II Cup Impactor U-M II Cup Impactor Alignment Rod 90˚ 45˚