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KMID : 0613820060160050773
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Journal of Life Science
2006 Volume.16 No. 5 p.773 ~ p.779
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A Biomechanical Comparative Analysis between Single-Radius and Multi-Radius Total Knee Arthroplasty for Sit-to-Stand Movement
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Jin Young-Wan
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Abstract
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Eight of the individuals had a unilateral S-RAD TKA and Multi-Radius TKA (Scorpio™ PS, Howmedica-Osteonics, Inc.). The instrument were used Peak Motion Measurement System™ , MYOPAC™EMG System, KIN-COM Ⅲ™ System. The Figure 3 shows that the average time for the S-RAD group to accomplish the sit-to-stand movement was 1.59 s, which was 0.19 s less than the M-RAD group (p= 0.033). In Figure 5, the S-RAD TKA group tended to have 7º s-1 less trunk flexion velocity than that of the M-RAD group (p= 0.058). The Figure 6 shows that the S-RAD TKA limb tended to have less ADD displacement (p = 0.071) than that of the M-RAD TKA limb. We failed to find significant differences for ABD and ADD displacements between the S-RAD and M-RAD N-TKA limbs (p= 0.128 and 0.457, respectively). The VM of the S-RAD TKA limb demonstrated significant less RMS EMG than that of the M-RAD TKA limb from 60º to 15º of knee flexion (p ＜ 0.05). The VL of the S-RAD TKA limb also demonstrated significant less RMS EMG than that of the M-RAD TKA limb from 60º to 45º of knee flexion (p ＜ 0.05). Similar to the VM and VL, the RF of the S-RAD TKA limb showed less RMS EMG than that of the M-RAD TKA limb from 60º to 30º of knee flexion (p ＜ 0.05).
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KEYWORD
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Multi-radius, single-radius, TKA, biomechanics
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