Comput. Aided Surg. - Imageless navigation assisted total knee arthroplasty with comprehensive gap balancing in medial osteoarthritic varus knees with anatomic variations.

Tópicos

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Resumo

This study retrospectively compares the postoperative alignment of imageless navigation assisted (INA) total knee arthroplasties (TKAs) using comprehensive gap balancing with that of conventional TKAs in 72 medial osteoarthritic varus knees with coronal plane anatomic variations of the distal femur and proximal tibia. The navigation group showed significantly lower postoperative differences in the mechanical axis (MA) of the lower limb (p = 0.003), with fewer outliers (p = 0.03), better femoral component positioning relative to the MA (p = 0.02), and less difference between the weight-bearing MA of the lower limb and the MA of the femur (p = 0.003) and tibia (p = 0.005). INA comprehensive gap balancing TKA provides a better correction of leg alignment and better orientation of components with respect to the MA in medial osteoarthritic varus knees with lateral bowing of the femoral shaft and external rotation of the femur and/or proximal tibia vara, thus indicating the superiority of this approach over the conventional technique in such situations.

Resumo Limpo

studi retrospect compar postop align imageless navig assist ina total knee arthroplasti tkas use comprehens gap balanc convent tkas medial osteoarthrit varus knee coron plane anatom variat distal femur proxim tibia navig group show signific lower postop differ mechan axi ma lower limb p fewer outlier p better femor compon posit relat ma p less differ weightbear ma lower limb ma femur p tibia p ina comprehens gap balanc tka provid better correct leg align better orient compon respect ma medial osteoarthrit varus knee later bow femor shaft extern rotat femur andor proxim tibia vara thus indic superior approach convent techniqu situat

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