Comparison of two different on-shelf femoral stems for Crowe type IV developmental dysplasia of the hip
Objective This study was performed to evaluate the proximal anatomical compatibility of stems for treatment of Crowe IV developmental dysplasia of the hip (DDH) using a previously developed three-dimensional comparison technique. Methods Patients with Crowe IV DDH who underwent computed tomography w...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2020-08-01
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| Series: | Journal of International Medical Research |
| Online Access: | https://doi.org/10.1177/0300060520947888 |
| _version_ | 1819292210497060864 |
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| author | Tong Liu Yuhui Yang Xianyue Shen Jianlin Xiao Jianlin Zuo Zhongli Gao |
| author_facet | Tong Liu Yuhui Yang Xianyue Shen Jianlin Xiao Jianlin Zuo Zhongli Gao |
| author_sort | Tong Liu |
| collection | DOAJ |
| description | Objective This study was performed to evaluate the proximal anatomical compatibility of stems for treatment of Crowe IV developmental dysplasia of the hip (DDH) using a previously developed three-dimensional comparison technique. Methods Patients with Crowe IV DDH who underwent computed tomography were retrospectively analyzed. The femoral medullary canals were three-dimensionally reconstructed, and models of cementless modular (S-ROM; DePuy Synthes) and conical (Wagner Cone; Zimmer Biomet) implants were used for virtual implantation. The negative point percentages (NPPs) were applied to verify fitting. The average distance (deviation) and the root mean square of the distance (RMSd) were used to quantify geometric compatibilities. Results Four (16.7%) and 12 (50.0%) femoral medullary canals could not be fitted properly with either the modular or conical implant. The NPPs in the distal comparison region were significantly greater in the conical than modular group. The deviation was significantly smaller in the modular than conical group. The RMSd was also significantly smaller in the modular than conical group. Conclusions Compared with conical implants, modular implants might be more effectively used in patients with Crowe type IV DDH. However, some Crowe IV DDH femurs with severe deformity cannot be fitted with either of these two on-shelf implants. |
| first_indexed | 2024-12-24T03:50:55Z |
| format | Article |
| id | doaj.art-8fbe471e2e8146c0a75bd2fab058d9c6 |
| institution | Directory Open Access Journal |
| issn | 1473-2300 |
| language | English |
| last_indexed | 2024-12-24T03:50:55Z |
| publishDate | 2020-08-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Journal of International Medical Research |
| spelling | doaj.art-8fbe471e2e8146c0a75bd2fab058d9c62022-12-21T17:16:36ZengSAGE PublishingJournal of International Medical Research1473-23002020-08-014810.1177/0300060520947888Comparison of two different on-shelf femoral stems for Crowe type IV developmental dysplasia of the hipTong LiuYuhui YangXianyue ShenJianlin XiaoJianlin ZuoZhongli GaoObjective This study was performed to evaluate the proximal anatomical compatibility of stems for treatment of Crowe IV developmental dysplasia of the hip (DDH) using a previously developed three-dimensional comparison technique. Methods Patients with Crowe IV DDH who underwent computed tomography were retrospectively analyzed. The femoral medullary canals were three-dimensionally reconstructed, and models of cementless modular (S-ROM; DePuy Synthes) and conical (Wagner Cone; Zimmer Biomet) implants were used for virtual implantation. The negative point percentages (NPPs) were applied to verify fitting. The average distance (deviation) and the root mean square of the distance (RMSd) were used to quantify geometric compatibilities. Results Four (16.7%) and 12 (50.0%) femoral medullary canals could not be fitted properly with either the modular or conical implant. The NPPs in the distal comparison region were significantly greater in the conical than modular group. The deviation was significantly smaller in the modular than conical group. The RMSd was also significantly smaller in the modular than conical group. Conclusions Compared with conical implants, modular implants might be more effectively used in patients with Crowe type IV DDH. However, some Crowe IV DDH femurs with severe deformity cannot be fitted with either of these two on-shelf implants.https://doi.org/10.1177/0300060520947888 |
| spellingShingle | Tong Liu Yuhui Yang Xianyue Shen Jianlin Xiao Jianlin Zuo Zhongli Gao Comparison of two different on-shelf femoral stems for Crowe type IV developmental dysplasia of the hip Journal of International Medical Research |
| title | Comparison of two different on-shelf femoral stems for Crowe type IV developmental dysplasia of the hip |
| title_full | Comparison of two different on-shelf femoral stems for Crowe type IV developmental dysplasia of the hip |
| title_fullStr | Comparison of two different on-shelf femoral stems for Crowe type IV developmental dysplasia of the hip |
| title_full_unstemmed | Comparison of two different on-shelf femoral stems for Crowe type IV developmental dysplasia of the hip |
| title_short | Comparison of two different on-shelf femoral stems for Crowe type IV developmental dysplasia of the hip |
| title_sort | comparison of two different on shelf femoral stems for crowe type iv developmental dysplasia of the hip |
| url | https://doi.org/10.1177/0300060520947888 |
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