Comput Methods Programs Biomed - A computer assessment of the effect of hindfoot alignment on mechanical axis deviation.

Tópicos

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Resumo

Lower limb malalignment is a common cause of disability that increases risk of osteoarthritis (OA). Treatment of OA may require an osteotomy or arthroplasty, which mandate accurate evaluation of mechanical loading on the limbs to achieve optimal alignment and minimal implant wear. Surgical planning uses a conventional method of mechanical axis deviation (MADC) measured from the center of the femoral head to the center of the ankle. This method fails to account for hindfoot deformity distal to the ankle. We used a computer model to compare MADC with the ground mechanical axis deviation (MADG), drawn from the center of the hip to the ground reaction point. Average anatomic measurements were analyzed with a range of knee and hindfoot angle variation in single leg stance, double leg stance, toe off and heel strike. MADG was consistently higher than MADC, suggesting a more complete estimate of weight-bearing axis that considers hindfoot deformity.

Resumo Limpo

lower limb malalign common caus disabl increas risk osteoarthr oa treatment oa may requir osteotomi arthroplasti mandat accur evalu mechan load limb achiev optim align minim implant wear surgic plan use convent method mechan axi deviat madc measur center femor head center ankl method fail account hindfoot deform distal ankl use comput model compar madc ground mechan axi deviat madg drawn center hip ground reaction point averag anatom measur analyz rang knee hindfoot angl variat singl leg stanc doubl leg stanc toe heel strike madg consist higher madc suggest complet estim weightbear axi consid hindfoot deform

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