Figure 44
Figure 45
32
Drill Selection Guide
>
For Tritanium Metal-Backed Patella: Use the
standard Metal-Backed Patella drill (6541-3-522);
5 .7mm (0 .225in) drill diameter = 0 .4mm (0 .016in)
pressfit .
>
If the bone is sclerotic in any of the peg locations,
the Surgeon may elect to use the Tritanium Dense
Bone Patella Drill (6541-3-526), which will create
slightly less press fit; 6 .0mm (0 .235in) drill diameter
= 0 .15mm (0 .006in) pressfit .
>
If the surgeon chooses to cement the Tritanium
Metal-Backed Patella or prefers to use a cemented
All Poly-Patella, then the All-Poly Patella Drill (6541-
3-524) must be used .
>
Drill three fixation holes with the appropriate drill .
Patella Preparation
Patella
Preparation
Patella Resection
>
Patella preparation is optional and is based on
surgeon preference and surgeon evaluation of the
articulating surface .
>
Remove all osteophytes and synovial insertions
around the patella, and measure thickness using a
caliper .
>
After determining the depth of the cut, affix the
stylus in the appropriate slot of the Patella Resection
Guide and capture the patella between the jaws of
the guide .
Note: Care should be taken when determining the
depth of the cut in an effort to minimize the risk of
fracture . The amount of bone to be left after resecting
the patella is a clinical decision and is based on surgeon
judgment and evaluation of patient characteristics .
>
Using a .050˝ (1 .25mm) non-offset sawblade, resect
the patella .
Patella Peg Preparation
>
Choose the appropriate size Patella Drill Template
and insert into the Patella Clamp .
>
Position the chosen patellar drill guide over the
patella and secure it to the bone by deploying the
clamp mechanism .
