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Influence of soft tissue artifacts on the calculated kinematics and kinetics of total knee replacements during sit-to-stand.
Gait Posture. 2011 Mar; 33(3):379-84.GP

Abstract

The current study aimed to quantify the soft tissue artifacts of selected markers on the thigh and shank, and their effects on the calculated joint center translations, angles and moments of the knee during sit-to-stand. Ten patients with total knee replacements rose from a chair under simultaneous surveillance of a motion capture system, a force-plate and a fluoroscopy system. The "true" poses of the thigh and shank were defined by those of the femoral and tibial components obtained using a three-dimensional fluoroscopy method. The soft tissue artifacts of the skin markers were calculated as their movement relative to the underlying prosthesis components. The joint center translations, angles and moments at the knee were also calculated separately using skin markers and the registered prosthesis poses. Considerable soft tissue artifacts were found, leading to significantly underestimated flexion and internal rotation angles, and extensor moments, but overestimated joint center translations and adduction. The current study provides accurate data of the kinematics and kinetics of total knee replacements during sit-to-stand. The effects of soft tissue artifacts on the calculated joint center translations, angles and moments were also quantified for the first time in the literature. The results may help in developing guidelines for using skin markers and in establishing databases in the biomechanical assessment of sit-to-stand in patients with total knee replacements.

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Authors+Show Affiliations

Kuo MY
Institute of Biomedical Engineering, National Taiwan University, Taiwan, ROC.
Tsai TY
No affiliation info available
Lin CC
No affiliation info available
Lu TW
No affiliation info available
Hsu HC
No affiliation info available
Shen WC
No affiliation info available

MeSH

AgedAged, 80 and overAnthropometryArthroplasty, Replacement, KneeArtifactsBiomechanical PhenomenaConnective TissueFemaleFluoroscopyHumansImaging, Three-DimensionalKinesisKnee JointMaleMovementPhotogrammetryPostureRange of Motion, ArticularSampling StudiesSensitivity and Specificity

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21227694

Citation

Kuo, Mei-Ying, et al. "Influence of Soft Tissue Artifacts On the Calculated Kinematics and Kinetics of Total Knee Replacements During Sit-to-stand." Gait & Posture, vol. 33, no. 3, 2011, pp. 379-84.
Kuo MY, Tsai TY, Lin CC, et al. Influence of soft tissue artifacts on the calculated kinematics and kinetics of total knee replacements during sit-to-stand. Gait Posture. 2011;33(3):379-84.
Kuo, M. Y., Tsai, T. Y., Lin, C. C., Lu, T. W., Hsu, H. C., & Shen, W. C. (2011). Influence of soft tissue artifacts on the calculated kinematics and kinetics of total knee replacements during sit-to-stand. Gait & Posture, 33(3), 379-84. https://doi.org/10.1016/j.gaitpost.2010.12.007
Kuo MY, et al. Influence of Soft Tissue Artifacts On the Calculated Kinematics and Kinetics of Total Knee Replacements During Sit-to-stand. Gait Posture. 2011;33(3):379-84. PubMed PMID: 21227694.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of soft tissue artifacts on the calculated kinematics and kinetics of total knee replacements during sit-to-stand. AU - Kuo,Mei-Ying, AU - Tsai,Tsung-Yuan, AU - Lin,Cheng-Chung, AU - Lu,Tung-Wu, AU - Hsu,Horng-Chaung, AU - Shen,Wu-Chung, Y1 - 2011/01/11/ PY - 2010/04/28/received PY - 2010/10/01/revised PY - 2010/12/09/accepted PY - 2011/1/14/entrez PY - 2011/1/14/pubmed PY - 2011/7/14/medline SP - 379 EP - 84 JF - Gait & posture JO - Gait Posture VL - 33 IS - 3 N2 - The current study aimed to quantify the soft tissue artifacts of selected markers on the thigh and shank, and their effects on the calculated joint center translations, angles and moments of the knee during sit-to-stand. Ten patients with total knee replacements rose from a chair under simultaneous surveillance of a motion capture system, a force-plate and a fluoroscopy system. The "true" poses of the thigh and shank were defined by those of the femoral and tibial components obtained using a three-dimensional fluoroscopy method. The soft tissue artifacts of the skin markers were calculated as their movement relative to the underlying prosthesis components. The joint center translations, angles and moments at the knee were also calculated separately using skin markers and the registered prosthesis poses. Considerable soft tissue artifacts were found, leading to significantly underestimated flexion and internal rotation angles, and extensor moments, but overestimated joint center translations and adduction. The current study provides accurate data of the kinematics and kinetics of total knee replacements during sit-to-stand. The effects of soft tissue artifacts on the calculated joint center translations, angles and moments were also quantified for the first time in the literature. The results may help in developing guidelines for using skin markers and in establishing databases in the biomechanical assessment of sit-to-stand in patients with total knee replacements. SN - 1879-2219 UR - https://www.unboundmedicine.com/medline/citation/21227694/Influence_of_soft_tissue_artifacts_on_the_calculated_kinematics_and_kinetics_of_total_knee_replacements_during_sit_to_stand_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0966-6362(10)00420-0 DB - PRIME DP - Unbound Medicine ER -