PFC Knee Flashcards
High Box Cut Why ?
Gives more stability and has a long spine
Constraint
Inherent resistance to montion in a give direction . Opposite of Laxity
Conformity
The degree to which two surfaces “Match” one another
Insert Matches with
Tibia in PFC
The J Curve
The sagittal deometry is designed to approximate the curevs of the femoral condayles . 5 Bone Cuts -5 Radii
Mimic the natural kinetamics of the knee . this is the advantage of multiple radii But this causes the instabiltiy during the movements from flexion to extension. Take the stryker rebuttal from Unni
Better Coronal Geometry
PS and CR Femoral component has a round on round femoral design to prevent edge loading
Edge loading happens at
135 degree of flexion in PFC and more than 150 in Attune
Patello Femoral Articulation
Deep patellar track lowers sheat stresses on the implant bone interface.
one spherical frmoral trochjelar
All Poly
no micro motion has a high surviorship dat a