Components Removal
Humeral head removal
To remove the humeral head, slide the anatomic head extractor between the collar of the PRIMA stem and the undersurface of the humeral head (Figure 48). Firmly tap the end of the instrument to loosen the head. It may be necessary to use more than one direction to accomplish the extraction. Using the 3.5 mm allen wrench plus T-handle with Zimmer connection remove the safety screw inside the adaptor whilst using the counter torque and the multipurpose handle to prevent load transmission. Then insert the humeral head adaptors extractor attached to the T-handle into the counter torque (Figure 49). Tighten the extractor until the disassembly operation has been completed.
Figure 48
Reverse insert removal
To remove the reverse insert from the PRIMA Stem, slide the reverse insert extractor between the collar of the PRIMA stem and the undersurface of the reverse insert. Firmly tap the end of the instrument to loosen the insert (Figure 50). For the removal of the glenoid component refer to the related surgical technique.
Figure 49
Figure 50
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