Mako PKA Question and Answer [2026] | UPDATED
ACTUAL Exam | Detailed Solutions
• implants displayed in what color -✓✓ green
• available procedures in PKA -✓✓ 1. medial uni
2.lateral uni
3. PF
4. medial bicompartmental
• 3 steps for medial tibia sizing -✓✓ 1. sizing
2. positioning
3. verification
• tibia size default -✓✓ 5
• tibial size constraints -✓✓ none
• tibial p. slope -✓✓ 3-7 degrees
• tibial proudness -✓✓ 2.5-3.5mm recommended
• goal for tibial slope -✓✓ 1-2 degrees LESS than native anatomical slope
• resection depth formula -✓✓ poly size - proudness = resection depth
• proudness -✓✓ top of implant to native bone surface
• optimal tibial sizing -✓✓ 1. no overhang A/P or M/L
2.does not intrude on tibial eminence (ACL insertion)
• optimal tibial positioning -✓✓ 1. align w/ native curvature
2. place on cortical rim
3. do not seat on osteophyte
• medial tibial int/ext -✓✓ 5 degrees int - 5 degrees ext
(transverse view)
• medial tibia var/val -✓✓ 0 - 1.5 degrees varus
(coronal view)
• medial femur sizing constraints -✓✓ 1 up 1 down
, • medial femur flex/ext -✓✓ 5 degrees flexion - 5 degrees extension
(sagittal view)
• T/F PKA allows for multiple plans saved in software -✓✓ true
• medial femur positioning -✓✓ lateralize w/o intruding in notch
• medial femur int/ext -✓✓ 5 degrees internal - 5 degrees external
(transverse view)
• medial femur var/val -✓✓ 3 degrees valgus -3 degrees varus
(coronal view)
• medial femur flex/ext goal -✓✓ 1mm proud of bone
(use crosshair to measure)
• inner and outer diameter of crosshair -✓✓ outer = 4mm
inner = 2mm (inner ring should touch outer edge of implant)
• Flexion Facet Center(FFC) -✓✓ center of rotation for posterior circles
• what type of design is PKA -✓✓ J-curve
• max tip distance value -✓✓ anterior tip of articular surface to bone surface
-found in info box
-keep under 2mm
-set slightly inset to cartilage
• PF planning steps -✓✓ 1. medial/lateral fit
2. superior lateral tip
3. trochlear groove
4. blumensaats line
5. superior medial tip
6. transitions zones
7. femoral anterior tip (bicomp only)
• Blumensaat's Line -✓✓ radiographic landmark representing the roof of intercondylar
notch
• T/F you should NEVER externally rotate a PF component -✓✓ true
• minimum amount of bone left on patella after resection -✓✓ 12mm
• PF medial/lateral fit goal -✓✓ 2mm from ridges
ACTUAL Exam | Detailed Solutions
• implants displayed in what color -✓✓ green
• available procedures in PKA -✓✓ 1. medial uni
2.lateral uni
3. PF
4. medial bicompartmental
• 3 steps for medial tibia sizing -✓✓ 1. sizing
2. positioning
3. verification
• tibia size default -✓✓ 5
• tibial size constraints -✓✓ none
• tibial p. slope -✓✓ 3-7 degrees
• tibial proudness -✓✓ 2.5-3.5mm recommended
• goal for tibial slope -✓✓ 1-2 degrees LESS than native anatomical slope
• resection depth formula -✓✓ poly size - proudness = resection depth
• proudness -✓✓ top of implant to native bone surface
• optimal tibial sizing -✓✓ 1. no overhang A/P or M/L
2.does not intrude on tibial eminence (ACL insertion)
• optimal tibial positioning -✓✓ 1. align w/ native curvature
2. place on cortical rim
3. do not seat on osteophyte
• medial tibial int/ext -✓✓ 5 degrees int - 5 degrees ext
(transverse view)
• medial tibia var/val -✓✓ 0 - 1.5 degrees varus
(coronal view)
• medial femur sizing constraints -✓✓ 1 up 1 down
, • medial femur flex/ext -✓✓ 5 degrees flexion - 5 degrees extension
(sagittal view)
• T/F PKA allows for multiple plans saved in software -✓✓ true
• medial femur positioning -✓✓ lateralize w/o intruding in notch
• medial femur int/ext -✓✓ 5 degrees internal - 5 degrees external
(transverse view)
• medial femur var/val -✓✓ 3 degrees valgus -3 degrees varus
(coronal view)
• medial femur flex/ext goal -✓✓ 1mm proud of bone
(use crosshair to measure)
• inner and outer diameter of crosshair -✓✓ outer = 4mm
inner = 2mm (inner ring should touch outer edge of implant)
• Flexion Facet Center(FFC) -✓✓ center of rotation for posterior circles
• what type of design is PKA -✓✓ J-curve
• max tip distance value -✓✓ anterior tip of articular surface to bone surface
-found in info box
-keep under 2mm
-set slightly inset to cartilage
• PF planning steps -✓✓ 1. medial/lateral fit
2. superior lateral tip
3. trochlear groove
4. blumensaats line
5. superior medial tip
6. transitions zones
7. femoral anterior tip (bicomp only)
• Blumensaat's Line -✓✓ radiographic landmark representing the roof of intercondylar
notch
• T/F you should NEVER externally rotate a PF component -✓✓ true
• minimum amount of bone left on patella after resection -✓✓ 12mm
• PF medial/lateral fit goal -✓✓ 2mm from ridges
