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- W2169968448 abstract "Objective . To compare center of mass (COM) compensation in the frontal and sagittal plane during gait in patients with large diameter head total hip arthroplasty (LDH-THA) and hip resurfacing (HR). Design . Observational study. Setting . Outpatient biomechanical laboratory. Participants . Two groups of 12 patients with LDH-THA and HR recruited from a larger randomized study and 11 healthy controls. Interventions . Not applicable. Main Outcome Measures . To compare the distance between the hip prosthetic joint center (HPJC) and the COM. The ratio (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>R</mml:mtext><mml:mrow><mml:mtext>HPJC-COM</mml:mtext></mml:mrow></mml:msub></mml:math>) and the variability (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>CV</mml:mtext><mml:mrow><mml:mtext>HPJC-COM</mml:mtext></mml:mrow></mml:msub></mml:math>) were compared between groups. Hip flexor, abductor, and adductor muscle strength was also correlated between groups while radiographic measurements were correlated with the outcome measures. Results . In the frontal plane, HR shows less variability than healthy controls at push-off and toe-off and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>R</mml:mtext><mml:mrow><mml:mtext>HPJC-COM</mml:mtext></mml:mrow></mml:msub></mml:math>is correlated with the muscle strength ratios (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>FR</mml:mtext><mml:mrow><mml:mtext>ABD</mml:mtext></mml:mrow></mml:msub></mml:math>) at heel contact, maximal weight acceptance, and mid stance. In the sagittal plane, LDH-THA has a higher<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>R</mml:mtext><mml:mrow><mml:mtext>HPJC-COM</mml:mtext></mml:mrow></mml:msub></mml:math>than healthy controls at push-off, and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>CV</mml:mtext><mml:mrow><mml:mtext>HPJC-COM</mml:mtext></mml:mrow></mml:msub></mml:math>is significantly correlated with<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>FR</mml:mtext><mml:mrow><mml:mtext>FLEX</mml:mtext></mml:mrow></mml:msub></mml:math>. Conclusions . One year after surgery, both groups of patients, LDH-THA and HR, demonstrate minor compensations at some specific instant of the gait cycle, in both frontal and sagittal planes. However, their locomotion pattern is similar to the healthy controls." @default.
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- W2169968448 date "2011-01-01" @default.
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- W2169968448 title "Center of Mass Compensation during Gait in Hip Arthroplasty Patients: Comparison between Large Diameter Head Total Hip Arthroplasty and Hip Resurfacing" @default.
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- W2169968448 doi "https://doi.org/10.1155/2011/586412" @default.
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