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Locking Mechanism Failure after Distal Femoral Reconstruction with Modular Universal Tumor and Revision System (MUTARS) Tumor Prosthesis / 대한정형외과학회잡지
The Journal of the Korean Orthopaedic Association ; : 435-441, 2017.
Article in Korean | WPRIM | ID: wpr-655100
ABSTRACT

PURPOSE:

We have used Modular Universal Tumor and Revision System (MUTARS) tumor prosthesis to reconstruct segmental resection defect of the distal femur. The purpose of this study was to evaluate the incidence and pattern of locking mechanism breakage and its correlation with other clinical variables. MATERIALS AND

METHODS:

We retrospectively reviewed 94 patients who were followed-up for more than one year after tumor prosthesis replacement (MUTARS) between 2008 and 2013. We examined the incidence and timing of locking mechanism (PEEK-OPTIMA) failure. We also evaluated the clinical characteristics of patients experiencing locking mechanism failure and compared them with those of other patients.

RESULTS:

At a mean follow-up of 55 months, we observed locking mechanism failure in 10 of 94 patients (10.6%). The mean age of patients with locking mechanism failure was 29 years (range, 13-54 years); the mean weight and height were 169 cm (range, 151-181 cm) and 67 kg (range, 53-89 kg), respectively. The mean body mass index was 23.5 kg/m² (range, 20.5-29.4 kg/m²). The median time interval between replacement and locking mechanism failure was 26.5 months (range, 12-72 months). The mean body weight of patients with failure was higher than that of patients without failure (p=0.019).

CONCLUSION:

The incidence of locking mechanism (PEEK-OPTIMA) failure after distal femoral reconstruction with MUTARS was 11%, and there was a correlation between failure and body weight of patients. Advancements in the design and material of locking mechanisms are warranted to reduce the complication.
Subject(s)

Full text: Available Index: WPRIM (Western Pacific) Main subject: Prostheses and Implants / Body Weight / Body Mass Index / Incidence / Retrospective Studies / Follow-Up Studies / Femur Type of study: Incidence study / Observational study / Prognostic study Limits: Humans Language: Korean Journal: The Journal of the Korean Orthopaedic Association Year: 2017 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Prostheses and Implants / Body Weight / Body Mass Index / Incidence / Retrospective Studies / Follow-Up Studies / Femur Type of study: Incidence study / Observational study / Prognostic study Limits: Humans Language: Korean Journal: The Journal of the Korean Orthopaedic Association Year: 2017 Type: Article