Zimmer Biomet Persona, Surgical Technique, Page: 18 / 72

16 |
Persona
®
Revision Knee System
Surgical Technique
Tibial Stem Housing Preparation
(cont.)
Offset Stem Preparation Only
Use a tilt reamer to clear out bone for the offset
transition. Drive the tilt reamer in the tibial canal until
the thin tibial line is level with the tibial plateau. Tilt the
tilt reamer in the same direction as the arrow of the
offset stem reamer adapter to remove the necessary
amount of bone for a 3 mm or 6 mm offset stem
(Figure 25).
Straight and Offset Stem Housing Preparation
Assemble the appropriate diameter, length, straight or
offset stem provisional based on the last sized reamer
used to the stem extension post and insert into the
tibia by hand or with the T-handle (Figures 26 and 27).
Note: The stem provisionals are designed with a
tight fit and may require being tapped into the canal
until the tibial depth line of the stem extension post
is level with the tibial plateau.
Figure 26 Figure 27 Figure 28
Figure 29
Figure 30
If an offset stem is utilized, make sure to align the line
of the offset number previously determined anteriorly
while inserting (Figure 28).
Verify that the tibial depth line on the stem extension
post is level or distal to the highest point of the resected
tibial plateau (Figure 29). Ensure the stem extension
post is stable in the canal. Tap into place, if necessary.
Ream for the tibial stem housing by placing the
19.5 mm cannulated reamer (22.5 mm cannulated
reamer for tibial cone use) over the stem extension
post. Start power prior to bone contact and ream until
the thin tibial line on the reamer is aligned with the
proximal tibial plane (Figure 30).
Note:
If medial or lateral augments are being
utilized, leave the extension post proud to the
corresponding thickness.
Figure 25
Thin Tibial Depth Line
Thin Tibial Depth Line