Conversion from Anatomic to Reverse
Note. The conversion of the implant must be performed only in case of good stability of the implanted PRIMA Stem.
Humeral side trialing Expose the humerus and select the trial reverse insert according to the implanted 40 mm or 44 mm glenosphere and insert it into the PRIMA stem as described on page 26 of the PRIMA surgical technique (Figure 41). Reduce the implant to verify the shoulder tensioning and address any laxity by replacing with the next liner size.
Removal of the humeral head and adaptor Remove the humeral head and the adaptor as described on page 29 of the PRIMA surgical technique. If no metal back glenoid has been implanted previously, proceed with the glenoid preparation as described in the SMR surgical technique.
Insertion of the definitive components
Open the packaging of the reverse insert that was selected during the trial reduction. Clean the PRIMA Stem and insert the final reverse insert as described at page 28 (Figure 46). Refer to the SMR surgical technique (SMR Metal Back, SMR Axioma TT Metal Back, SMR TT 360 Augmented Glenoid and SMR TT Hybrid Glenoid reverse baseplate) for the glenoid implantation. Finally reduce the shoulder joint.
Previous glenoid implant
Remove the anatomical component on the glenoid side as described in the SMR surgical technique.
Figure 53
Figure 54
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