Pelvic tracker effects on hip center accuracy using imageless navigation
| Autor: | William M. Mihalko, Kenneth A. Krackow, Matthew J. Phillips, Zair Fishkin |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
musculoskeletal diseases
medicine.medical_specialty Rotation Radiography Femoral head Cadaver Humans Medicine Knee Femur Center (algebra and category theory) Range of Motion Articular Instant centre of rotation Pelvis Orthodontics business.industry Computer Science Applications medicine.anatomical_structure Surgery Computer-Assisted Hip Joint Surgery Radiology Tomography X-Ray Computed Family Practice business Range of motion Algorithms |
| Zdroj: | Computer Aided Surgery. 11:214-218 |
| ISSN: | 1097-0150 1092-9088 |
| DOI: | 10.3109/10929080600942147 |
| Popis: | Imageless computer assisted total knee surgical systems have commonly relied on determination of the functional rotational center of the femoral head as a landmark for determining the lower extremity mechanical axis. This has been accomplished through range of motion and center of rotation calculations for the femur with respect to the pelvis as the lower extremity is taken through a range of motion. Our study evaluated the use of this algorithm with and without a pelvic tracker attached to the iliac crest.The functional center of the hip joint was also compared to the true radiographic center as determined by spiral CT data. Evaluating the different methods on six lower extremities from three whole-body cadavers revealed significant differences in the location of the calculated hip joint center, but little difference in the resulting lower extremity mechanical axis determination. The functional hip joint centers measured with and without a pelvic tracker differed from one another and from the CT-determined hip center.No differences were found in the coronal plane measurements, but statistically significant differences were found in the sagittal plane measurements.Algorithms that reduce the noise generated by pelvic movement should be devised to eliminate the need for a pelvic tracker. |
| Databáze: | OpenAIRE |
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