Phenotype → gap curve + insert

Joint Boss Ortho Home

Surgeons only. Educational heuristic — not an IFU, not standard of care, not a doctor–patient relationship. You own the operation. Do not send PHI to [email protected].

Scanogram numbers

Standing deformity (°)

Direction

mLDFA (°)

MPTA (°)

Neutral femur or tibia ≈ 87°. Higher mLDFA = more varus femur. Lower MPTA = more varus tibia.

JLCA (°)

Native slope (°) optional

Insert you are planning Prior ligament surgery

ACL graft (if ACLR)

Current residual laxity

Ligament history modifies trust in the envelope. It does not change mLDFA or MPTA.