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Table 1

Comparison of the medial and lateral approaches for TKA in valgus knee deformity postoperative [TKA: total knee arthroplasty; KSS: Knee Society Score; ROM: range of motion; IT: iliotibial].

Approach Advantages Limitations
Medial
  • More familiar to most surgeons

  • Easier and quicker exposure in standard TKA cases

  • Higher postoperative KSS and ROM (though differences are minimal)

  • Comparable surgical time to the lateral approach

  • Reliable correction of valgus deformity

  • Requires extensive medial release, which may lead to instability

  • Risk of overcorrection or residual valgus

  • Less effective in restoring the anatomical axis in some cases (accurate restoration only in 22–30%)

  • Possible increased risk of peroneal nerve palsy

Lateral
  • Better access to contracted lateral structures (IT band, posterolateral capsule)

  • More anatomical restoration of knee alignment

  • Less risk of overcorrection or medial instability

  • Avoids excessive medial release

  • Technically more challenging

  • Longer learning curve for surgeons

  • Higher risk of patellar tracking issues

  • May require tibial tubercle osteotomy or quadriceps snip for exposure in severe valgus knees

  • Higher rates of intraoperative fractures and patellar complications

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