Radiostereometric migration measurement of an uncemented Cerafit® femoral stem: 26 patients followed for 10 years
-
Stefan Sesselmann
,
Yotung Hong
Abstract
Radiostereometric analysis (RSA) is the gold standard for evaluating micromotions of orthopaedic implants. The method is applied for identifying novel design weaknesses in endoprostheses. Current research frequently assesses relatively short time periods. Short-term RSA studies have been widely used for predicting the long-term stability of many hip prosthetic designs, but only a few studies have focused on uncemented hip implants, especially for extended periods. The purpose of this study was to analyse the migration pattern of the Cerafit® femoral stem within 10 years and to verify the predictive value of short-term RSA after 2 years for this uncemented femoral hip stem. Twenty-six patients were followed for 10 years. Ten years after implantation, a mean subsidence of 0.22 mm±0.56 mm, a mean internal rotation of 0.59°±1.67° and a mean maximum total point motion (MTPM) of 1.28 mm±0.54 mm were detected. The main migration took place in the first 6 weeks after surgery (subsidence of 0.36 mm±0.73 mm; internal rotation of 0.62°±1.49°, MTPM of 1.05 mm±0.68 mm). All the migration values measured were small. No late-onset migration was observed. This study suggests that the Cerafit® implants are stable after 10 years. Thus, RSA could be the best tool to assess long-term implant behaviour.
Acknowledgements
We thank the Deutsche Arthrose-Hilfe e.V. (Frankfurt/Main, Germany) for the financial support.
Conflict of interest statement: No competing interests declared.
References
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©2018 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Research articles
- Effect of TMS coil orientation on the spatial distribution of motor evoked potentials in an intrinsic hand muscle
- Response time of indirectly accessed gas exchange depends on measurement method
- Radiostereometric migration measurement of an uncemented Cerafit® femoral stem: 26 patients followed for 10 years
- Biomechanical comparison of a novel monocortical and two common bicortical external fixation systems regarding rigidity and dynamic stability
- Assessing regional lung mechanics by combining electrical impedance tomography and forced oscillation technique
- Head phantoms for electroencephalography and transcranial electric stimulation: a skull material study
- Variations of ankle-foot orthosis-constrained movements increase ankle range of movement while maintaining power output of recumbent cycling
- Sensitivity enhancement of a folded beam MEMS capacitive accelerometer-based microphone for fully implantable hearing application
- Validation of a novel biomechanical test bench for the knee joint with six degrees of freedom
- Bone plate-screw constructs for osteosynthesis – recommendations for standardized mechanical torsion and bending tests
- Pupillographic campimetry: an objective method to measure the visual field
Articles in the same Issue
- Frontmatter
- Research articles
- Effect of TMS coil orientation on the spatial distribution of motor evoked potentials in an intrinsic hand muscle
- Response time of indirectly accessed gas exchange depends on measurement method
- Radiostereometric migration measurement of an uncemented Cerafit® femoral stem: 26 patients followed for 10 years
- Biomechanical comparison of a novel monocortical and two common bicortical external fixation systems regarding rigidity and dynamic stability
- Assessing regional lung mechanics by combining electrical impedance tomography and forced oscillation technique
- Head phantoms for electroencephalography and transcranial electric stimulation: a skull material study
- Variations of ankle-foot orthosis-constrained movements increase ankle range of movement while maintaining power output of recumbent cycling
- Sensitivity enhancement of a folded beam MEMS capacitive accelerometer-based microphone for fully implantable hearing application
- Validation of a novel biomechanical test bench for the knee joint with six degrees of freedom
- Bone plate-screw constructs for osteosynthesis – recommendations for standardized mechanical torsion and bending tests
- Pupillographic campimetry: an objective method to measure the visual field
