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A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty.

Publication ,  Journal Article
Sutter, EG; Wellman, SS; Bolognesi, MP; Seyler, TM
Published in: Adv Orthop
2019

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.

Duke Scholars

Published In

Adv Orthop

DOI

ISSN

2090-3464

Publication Date

2019

Volume

2019

Start / End Page

4780280

Location

Egypt

Related Subject Headings

  • 3202 Clinical sciences
  • 1103 Clinical Sciences
  • 0903 Biomedical Engineering
 

Citation

APA
Chicago
ICMJE
MLA
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Sutter, E. G., Wellman, S. S., Bolognesi, M. P., & Seyler, T. M. (2019). A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty. Adv Orthop, 2019, 4780280. https://doi.org/10.1155/2019/4780280
Sutter, E Grant, Samuel S. Wellman, Michael P. Bolognesi, and Thorsten M. Seyler. “A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty.Adv Orthop 2019 (2019): 4780280. https://doi.org/10.1155/2019/4780280.
Sutter EG, Wellman SS, Bolognesi MP, Seyler TM. A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty. Adv Orthop. 2019;2019:4780280.
Sutter, E. Grant, et al. “A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty.Adv Orthop, vol. 2019, 2019, p. 4780280. Pubmed, doi:10.1155/2019/4780280.
Sutter EG, Wellman SS, Bolognesi MP, Seyler TM. A Geometric Model to Determine Patient-Specific Cup Anteversion Based on Pelvic Motion in Total Hip Arthroplasty. Adv Orthop. 2019;2019:4780280.
Journal cover image

Published In

Adv Orthop

DOI

ISSN

2090-3464

Publication Date

2019

Volume

2019

Start / End Page

4780280

Location

Egypt

Related Subject Headings

  • 3202 Clinical sciences
  • 1103 Clinical Sciences
  • 0903 Biomedical Engineering