Preserving the abductor mechanism in robotic THR: the influence of stem design and cutterpath
| Autor: | U. Simon, Philipp Drees, Jens Decking, M. Zurstegge, C. Schoellner |
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| Rok vydání: | 2004 |
| Předmět: |
Male
Greater trochanter Materials science Attachment site Arthroplasty Replacement Hip User-Computer Interface Prosthesis Fitting Osteoarthritis medicine Humans Femur Muscle Skeletal Gait Preoperative planning Trochanter technology industry and agriculture Straight stem Anatomy Robotics Computer Science Applications Mechanism (engineering) Normal gait medicine.anatomical_structure Surgery Computer-Assisted Surgery Muscles of the hip Female Hip Joint Family Practice Tomography X-Ray Computed Biomedical engineering |
| Zdroj: | Computer aided surgery : official journal of the International Society for Computer Aided Surgery. 8(3) |
| ISSN: | 1092-9088 |
| Popis: | The tip of the greater trochanter is the attachment site for the abductor muscles of the hip joint. Its preservation in robotic and conventional THR is important for normal gait. The effect of different stem designs and robotic cutterpaths on the preservation of the trochanter tip is examined.One anatomical stem, one straight stem, and one stem specifically designed for robotic THR were implanted virtually in CT scans of osteoarthrotic hip joints using the Torch preoperative planning unit (URS-ortho). In transverse sections of the trochanter tip, dimensions of the trochanter area removed by the milling tool were recorded for each stem design and different cutterpaths (3-axis versus 5-axis milling).Five-axis milling showed significantly better results than 3-axis milling. For straight stems, more bone was removed than for anatomic stems. The most favorable results were achieved with 5-axis milling and a curved stem specifically designed for robotic THR.The introduction of 5-axis milling in robotic THR is an improvement of the technique and makes preservation of the abductor mechanism at the tip of the greater trochanter easier for the surgeon. |
| Databáze: | OpenAIRE |
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