Navegando por Palavras-chave "prótese de joelho"

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    Rotação axial do componente femoral da artroplastia total de joelho realizada pela técnica de balanceamento dos gaps: mensuração por tomografia computadorizada
    (Universidade Federal de São Paulo (UNIFESP), 2015-11-11) Aihara, Andre Yui [UNIFESP]; Fernandes, Artur da Rocha Correa Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Background: 1. Define femoral component rotation by computed tomography (CT) as follows: posterior condylar angle (PCA) and condylar twist angle (CTA). 2. Determine the reliability of these measurements by CT. 3. Evaluate the inter-relationship between PCA and CTA. 4. Evaluate the frequency and agreement for the identification of the medial epicondyle sulcus (MES). Methods: Fifty CT knee scans from patients with gap-technique total knee arthroplasty were retrospectively reviewed. The PCA and CTA were calculated by 2 radiologists. The intraclass correlation coefficient (ICC) and 95% confidence interval were used to assess inter/intraobserver reliability. The Bland-Altmann test was used to analyze the mean difference between PCA and CTA. The Kappa test was used to determine the agreement for the identification of the MES. Results: The mean femoral component rotation values, as evaluated by PCA and CTA, were ?2.26°/?2.56° and ?5.54°/?6.28°, respectively, for the first and second observers. The respective intra- and interobserver ICC values were 0.95 and 0.9 for PCA and 0.85 and 0.89 for CTA. The mean differences between these readings were 3.3° and 4.0°. The ICC was 0.954-0.949 for the PCA and 0.859-0.898 for the CTA. The PCA and CTA measurement differences were no greater than 2° at least 90% of the time. The MES was identified in 64?78% of patients, with a Kappa of 0.448-0.519. Conclusions: The mean femoral component rotation values, as evaluated by PCA and CTA, were ?2.26°/?2.56° and ?5.54°/?6.28°. PCA and CTA measurement by CT is reliable. The use of PCA is preferable because of the higher observer concordance. PCA can be inferred by subtracting 3-4° from the CTA. The MES was identified in 64?78% of patients, with only moderate interobserver agreement.