Three resections. One motion.
0°Extension limit
130°Maximum flexion
Illustrative motion limits
Less resectionMore resection
Less resectionMore resection
Less resectionMore resection
Both surfaces at their reference positions.
Green surfaces preserve the original articular references on each bone.
Bearing thickness, tibial slope, femoral valgus and rotation stay fixed.
About this illustration
Positive values mean more resection. Tibial resection contributes to both illustrative motion limits. Distal femoral resection contributes to extension; posterior femoral resection contributes to flexion. Bearing thickness, slope and component angles remain fixed.
Extension uses the sum of distal femoral and tibial offsets: 4 mm less stops at 10°, zero reaches 0°, and 4 mm more reaches −5°. Maximum flexion uses the sum of posterior femoral and tibial offsets: 4 mm less reaches 125°, zero reaches 130°, and 4 mm more reaches 135°. These are authored teaching relationships, not clinically calibrated predictions.
The supplied Persona component moves rigidly; preparation follows its CAD. The femur is seated vertically against the bearing at each displayed pose to avoid sampled penetration. The green overlays retain approved distal and posterior femoral cartilage regions and the tibial articular reference. Ligament attachments follow the bones; slack is illustrative and forces are not calculated. Matching motion endpoints does not establish equivalent contact mechanics, stability or clinical outcomes.