PRIMA Stem Surgical technique
Make sure that the contact surfaces are perfectly clean and that the head or adaptor does not contact the bone, as this could compromise the stability of the morse taper coupling. Finally reduce the shoulder joint.
Tighten the screw using the 3.5 mm allen wrench with the T-handle with Zimmer connection and the counter torque attached to the multipurpose handle to prevent load transmission (Figure 37). Apply the definitive humeral head to the adaptor taper (Figure 38) and secure the coupling by tapping with the humeral head impactor and handle assembly (Figure 39). The head should sit flush on the osteotomy plane.
T handle with Zimmer connection
Counter-torque Handle for Anatomical Adaptors
Multipurpose handle
Figure 37
Figure 38
Figure 39
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