Scaling Methods of the Pelvis without Distortion for the Analysis of Bone Defects
For the development of new types of hip implants for acetabulum revision, it is beneficial to analyse the acetabular defects of the indication group in advance. In order to be able to specially compare the bone defects with each other, a normalisation and accompanying scaling of the pelvis is necess...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2022-09-01
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| Series: | Current Directions in Biomedical Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/cdbme-2022-1203 |
| _version_ | 1811159452195225600 |
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| author | Micheler Carina M. Lang Jan J. Wilhelm Nikolas J. Lazic Igor Hinterwimmer Florian Fritz Christian Eisenhart-Rothe Rüdiger von Zäh Michael F. Burgkart Rainer H. H. |
| author_facet | Micheler Carina M. Lang Jan J. Wilhelm Nikolas J. Lazic Igor Hinterwimmer Florian Fritz Christian Eisenhart-Rothe Rüdiger von Zäh Michael F. Burgkart Rainer H. H. |
| author_sort | Micheler Carina M. |
| collection | DOAJ |
| description | For the development of new types of hip implants for acetabulum revision, it is beneficial to analyse the acetabular defects of the indication group in advance. In order to be able to specially compare the bone defects with each other, a normalisation and accompanying scaling of the pelvis is necessary. Uniform scaling is required so that the bone structures are not distorted. In the following study, three scaling methods based on the minimal bounding box and sphere principle are compared with a method using 14 landmarks on the pelvis.The landmark method is applied to determine the true scaling factor. For the comparison of the different methods, 40 female pelvic models with an acetabular defect are analysed. In the comparison of the scaling methods, the method using minimal bounding spheres shows the least deviation from the landmark method (mean difference 3.30 ± 2.17 %). Due to the fact that no preprocessing (definition of the landmarks) is required and the fast implementation of the algorithm, the minimal bounding sphere is to be preferred to the landmark method for a fast size estimation. |
| first_indexed | 2024-04-10T05:41:21Z |
| format | Article |
| id | doaj.art-bb7a76cd3ec443e3922a9ed7645f8815 |
| institution | Directory Open Access Journal |
| issn | 2364-5504 |
| language | English |
| last_indexed | 2024-04-10T05:41:21Z |
| publishDate | 2022-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Current Directions in Biomedical Engineering |
| spelling | doaj.art-bb7a76cd3ec443e3922a9ed7645f88152023-03-06T10:24:52ZengDe GruyterCurrent Directions in Biomedical Engineering2364-55042022-09-018279780010.1515/cdbme-2022-1203Scaling Methods of the Pelvis without Distortion for the Analysis of Bone DefectsMicheler Carina M.0Lang Jan J.1Wilhelm Nikolas J.2Lazic Igor3Hinterwimmer Florian4Fritz Christian5Eisenhart-Rothe Rüdiger von6Zäh Michael F.7Burgkart Rainer H. H.8Department of Orthopaedics and Sports Orthopaedics, University Hospital rechts der Isar, School of Medicine, Technical University of Munich,Munich, GermanyChair of Non-destructive Testing, School of Engineering and Design, Technical University of Munich,Munich, GermanyMunich Institute of Robotics and Machine Intelligence, Department of Electrical and Computer Engineering, Technical University of Munich,Munich, GermanyDepartment of Orthopaedics and Sports Orthopaedics, University Hospital rechts der Isar, School of Medicine, Technical University of Munich,Munich, GermanyDepartment of Orthopaedics and Sports Orthopaedics, University Hospital rechts der Isar, School of Medicine, Technical University of Munich,Munich, GermanyInstitute for Machine Tools and Industrial Management, School of Engineering and Design, Technical University of Munich, Garching nearMunich, GermanyDepartment of Orthopaedics and Sports Orthopaedics, University Hospital rechts der Isar, School of Medicine, Technical University of Munich,Munich, GermanyInstitute for Machine Tools and Industrial Management, School of Engineering and Design, Technical University of Munich, Garching nearMunich, GermanyDepartment of Orthopaedics and Sports Orthopaedics, University Hospital rechts der Isar, School of Medicine, Technical University of Munich,Munich, GermanyFor the development of new types of hip implants for acetabulum revision, it is beneficial to analyse the acetabular defects of the indication group in advance. In order to be able to specially compare the bone defects with each other, a normalisation and accompanying scaling of the pelvis is necessary. Uniform scaling is required so that the bone structures are not distorted. In the following study, three scaling methods based on the minimal bounding box and sphere principle are compared with a method using 14 landmarks on the pelvis.The landmark method is applied to determine the true scaling factor. For the comparison of the different methods, 40 female pelvic models with an acetabular defect are analysed. In the comparison of the scaling methods, the method using minimal bounding spheres shows the least deviation from the landmark method (mean difference 3.30 ± 2.17 %). Due to the fact that no preprocessing (definition of the landmarks) is required and the fast implementation of the algorithm, the minimal bounding sphere is to be preferred to the landmark method for a fast size estimation.https://doi.org/10.1515/cdbme-2022-1203pelvislandmarkssize comparisonscalingminimal bounding boxminimal bounding sphere |
| spellingShingle | Micheler Carina M. Lang Jan J. Wilhelm Nikolas J. Lazic Igor Hinterwimmer Florian Fritz Christian Eisenhart-Rothe Rüdiger von Zäh Michael F. Burgkart Rainer H. H. Scaling Methods of the Pelvis without Distortion for the Analysis of Bone Defects Current Directions in Biomedical Engineering pelvis landmarks size comparison scaling minimal bounding box minimal bounding sphere |
| title | Scaling Methods of the Pelvis without Distortion for the Analysis of Bone Defects |
| title_full | Scaling Methods of the Pelvis without Distortion for the Analysis of Bone Defects |
| title_fullStr | Scaling Methods of the Pelvis without Distortion for the Analysis of Bone Defects |
| title_full_unstemmed | Scaling Methods of the Pelvis without Distortion for the Analysis of Bone Defects |
| title_short | Scaling Methods of the Pelvis without Distortion for the Analysis of Bone Defects |
| title_sort | scaling methods of the pelvis without distortion for the analysis of bone defects |
| topic | pelvis landmarks size comparison scaling minimal bounding box minimal bounding sphere |
| url | https://doi.org/10.1515/cdbme-2022-1203 |
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