A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty
Introduction. Cup position is critical to stability in total hip arthroplasty and is affected by pelvis motion during positions of daily life. The purpose of this study was to explicitly define the relationship between sagittal pelvic motion and resultant cup functional anteversion and create a tool...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Orthopedics |
| Online Access: | http://dx.doi.org/10.1155/2019/4780280 |
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| author | E. Grant Sutter Samuel S. Wellman Michael P. Bolognesi Thorsten M. Seyler |
| author_facet | E. Grant Sutter Samuel S. Wellman Michael P. Bolognesi Thorsten M. Seyler |
| author_sort | E. Grant Sutter |
| collection | DOAJ |
| description | Introduction. Cup position is critical to stability in total hip arthroplasty and is affected by pelvis motion during positions of daily life. The purpose of this study was to explicitly define the relationship between sagittal pelvic motion and resultant cup functional anteversion and create a tool to guide the surgeon to a patient-specific intra-operative anteversion. Materials and Methods. 10,560 combinations of inclination, anteversion, and pelvic tilt were generated using a geometric model. Resultant functional anteversion was calculated for each iteration and variables were correlated. An electronic mobile tool was created that compares inputted patient-specific values to population-based averages to determine pelvic positions and dynamics that may lead to instability. Results. A third-degree polynomial equation was used to describe the relationship between variables. The freely downloadable mobile tool uses input from pre-operative plain radiographic measurements to provide the surgeon a quantitative correction to intra-operative cup anteversion based on differences in functional anteversion compared to population-based averages. Conclusion. This study provides a geometric relationship between planned cup position, pelvic position and motion, and the resultant functional anteversion. This mathematical model was applied to an electronic tool that seeks to determine an individualized intra-operative cup anteversion based on measured patient-specific pelvic dynamics. |
| format | Article |
| id | doaj-art-e3397c558ac94f0aa72a46c2c8d39f52 |
| institution | OA Journals |
| issn | 2090-3464 2090-3472 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Orthopedics |
| spelling | doaj-art-e3397c558ac94f0aa72a46c2c8d39f522025-08-20T02:21:21ZengWileyAdvances in Orthopedics2090-34642090-34722019-01-01201910.1155/2019/47802804780280A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip ArthroplastyE. Grant Sutter0Samuel S. Wellman1Michael P. Bolognesi2Thorsten M. Seyler3Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USADepartment of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USADepartment of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USADepartment of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USAIntroduction. Cup position is critical to stability in total hip arthroplasty and is affected by pelvis motion during positions of daily life. The purpose of this study was to explicitly define the relationship between sagittal pelvic motion and resultant cup functional anteversion and create a tool to guide the surgeon to a patient-specific intra-operative anteversion. Materials and Methods. 10,560 combinations of inclination, anteversion, and pelvic tilt were generated using a geometric model. Resultant functional anteversion was calculated for each iteration and variables were correlated. An electronic mobile tool was created that compares inputted patient-specific values to population-based averages to determine pelvic positions and dynamics that may lead to instability. Results. A third-degree polynomial equation was used to describe the relationship between variables. The freely downloadable mobile tool uses input from pre-operative plain radiographic measurements to provide the surgeon a quantitative correction to intra-operative cup anteversion based on differences in functional anteversion compared to population-based averages. Conclusion. This study provides a geometric relationship between planned cup position, pelvic position and motion, and the resultant functional anteversion. This mathematical model was applied to an electronic tool that seeks to determine an individualized intra-operative cup anteversion based on measured patient-specific pelvic dynamics.http://dx.doi.org/10.1155/2019/4780280 |
| spellingShingle | E. Grant Sutter Samuel S. Wellman Michael P. Bolognesi Thorsten M. Seyler A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty Advances in Orthopedics |
| title | A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty |
| title_full | A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty |
| title_fullStr | A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty |
| title_full_unstemmed | A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty |
| title_short | A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty |
| title_sort | geometric model to determine patient specific cup anteversion based on pelvic motion in total hip arthroplasty |
| url | http://dx.doi.org/10.1155/2019/4780280 |
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