Fifteen Year Outcome of the Ceraver Hermes Posterior-Stabilized Total Knee Arthroplasty: Safety of the Procedure with Experienced and Inexperienced Surgeons

Philippe Hernigou*, 1, Olivier Manicom2, Charles Henri Flouzat-Lachaniete3, Xavier Roussignol3, Paolo Filippini3, Alexandre Poignard3
1 University Paris XII, Hospital Henri Mondor, 94010 Creteil, France
2 Hospital de Pointe à Pitre Guadeloupe, France
3 Hospital Henri Mondor, 94010 Creteil, France

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© Hernigou et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Department of Orthopaedics Surgery, University Paris XII, Hospital Henri Mondor, 94010 Creteil, France; Tel: 33149812601; Fax: 33149812608; E-mail:


We wished to determine whether total knee replacement (TKA) performed by young surgeons increased rates of mortality and complications compared with TKA performed by senior surgeons using the same model of arthroplasty. There were no significant pre-operative differences between the groups in terms of age, gender, height, weight, body mass index, diagnosis, comorbidity and duration of follow-up, which was a mean of 15 years in both groups. Hence, we assessed the 15 year survival of the first 150 Ceraver Posterior-Stabilized total knee arthroplasties undertaken by young surgeons (aged of less than 30 years) in formation in a single university hospital setting (Group B). We used survival curve analysis, with strict definitions regarding end-points, and evaluated a number of different endpoint criteria to assess the outcome and to compare the results with those obtained by the two seniors (aged of more than 40 years) with their 50 first implantations (Group A). The clinical results and survival rate of implants at intermediate to long-term follow-up were similar in both Groups. Kaplan-Meier survival analysis, with revision as the endpoint for failure, showed that the rate of survival at ten years was 96% (95% CI, 93 to 100) in both groups. At fifteen years the rate of survival was 91% (95% CI, 85 to 97) in group B, and 92% (95% CI, 90 to 94) in group A. The implant used in this series appears particularly safe since the usual complications observed with posterior stabilized arthroplasties were not observed even with young surgeons.