Abstract
Considering its cost saving, the all-polyethylene tibial component is of potential interest in developing countries like China. But to our knowledge, a survivorship comparison of all-polyethylene and metal-backed tibial components in posterior cruciate ligament-substituting total knee arthroplasty (PS-TKA) has not been studied in China previously. Using survivorship analysis, we have studied the midterm outcome of 34 cemented PS-TKA using an all-polyethylene tibial component and of 34 cemented PS-TKA using a metal-backed tibial component which has an identical articular surface with all-polyethylene tibial components. All operations were performed by the same group of surgeons; 58 patients underwent a unilateral operation and five patients a bilateral operation. These patients had a mean follow-up of 5.9 years (range: 5–7 years); three patients were lost to follow-up and one was revised for infection. No significant difference between the two groups was reported regarding HSS scores, ROM, clinical and radiographic parameters measured and survival rates. Although the Asian lifestyle includes more squatting and bending of the knee, the results of this series of TKA using all-polyethylene tibial components in Chinese people are comparable to the satisfactory results of other reported all-polyethylene series whose patients are mainly Western people. Considering its cost saving and excellent clinical result, the all-polyethylene tibial component is of potential interest in developing countries.
Résumé
Les plateaux tibiaux tout polyéthylène APTC permettent une économie financière aux niveaux des implants et ont un intérêt potentiel pour la Chine. En utilisant une analyse avec courbe de survie, nous avons réalisé un suivi moyen de 5,9 ans (5 à 7 ans) pour 34 prothèses postéro stabilisées cimentées PS-TKA en utilisant un plateau tout polyéthylène APTC. Et 34 prothèses avec un métal back MBTC avec la même surface de glissement que l’APTC. Il n’y a pas de différence significative entre les deux groupes si l’on considère le score HSS, la mobilité et la clinique ainsi que les paramètres radiographiques et les courbes de survie. Les courbes de survie à 5,9 ans sont de 93,55% pour le groupe APTC et de 93,75% pour le groupe MBTC. Cependant, le mode de vie asiatique nécessitant des flexions antérieures et une flexion importante des genoux ont un résultat identique chez les chinois (en utilisant une APTC) avec des résultats comparables et tout à fait satisfaisants comparées aux autres séries de plateaux tout PE des populations occidentales. Si l’on considère l’économie réalisée et les excellents résultats cliniques des prothèses APTC avec un composant tout polyéthylène, ceux-ci sont intéressants pour ces pays en voie de développement.
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The authors are grateful to the staff of the Statistic Department of Sichuan University for help with the statistical analysis.
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Shen, B., Yang, J., Zhou, Z. et al. Survivorship comparison of all-polyethylene and metal-backed tibial components in cruciate-substituting total knee arthroplasty—Chinese experience. International Orthopaedics (SICOT) 33, 1243–1247 (2009). https://doi.org/10.1007/s00264-008-0634-8
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DOI: https://doi.org/10.1007/s00264-008-0634-8