United Orthopedic Corporation

Cup Insertion Screw insertion The U-Motion II + Acetabular System offers cluster-hole and no-hole cups. For primary cases with good bone stock, no-hole cup may be a preferred choice. However, additional screw fixation is necessary whenever a deficient acetabulum or poor bone quality is met. The cluster-hole cup contains three screw holes. The screw placement should be inserted in the posterior superior quadrant of the acetabulum (Fig. 7) on a thick part of the ilium where there is a lower risk area of neurovascular damage. Use the U-M II Drill Guide 10 , Drill Bit 11 and Modular Flex Shaft 12 for drilled hole preparation (Fig. 9). The effective lengths of four drill bits are 15, 25, 35 and 50 mm. Carefully drill into acetabulum within selected holes, utilize the Depth Gauge 13 to determine an appropriate screw length (Fig. 10). Grasp the screw with the U-M II Screw Forceps 14 . Attach the flexible Universal Screwdriver 15 to the screw head, then insert the screw using the ratchet handle (Fig. 11). Allowed screw angulation varies by as much as 32° (Fig. 12). Care should also be taken to confirm the screw is fully seated within the screw hole without damaging the liner. Surgical tip: Run finger around the edge of dome holes to verify inserted screws are below the inner face of the cup. 5 10. U-M II Drill Guide 9206 - 2101 11. Drill Bit 9206 - 3115, 15mm 9206 - 3125, 25mm 9206 - 3135, 35mm 9206 - 3150, 50mm 12. Modular Flex Shaft 9206 - 1107 13. Depth Gauge 9206 - 7101 14. U-M II Screw Forceps 9206 - 5106 15. Universal Screwdriver 9206 - 1114 Fig. 9