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Research Article
Liangbi Xiang
General Hospital of Northern Theatre command
Corresponding Author
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This work is licensed under a CC BY 4.0 License. Read Full License
Background: Accurate femoral neck anteversion angle (FNA) measurement is of great significance in the diagnosis and treatment of developmental dysplasia of the hip (DDH) in children. The FNA measurement still remains a controversy. We aimed to verify the accuracy of our CT method by 3D printing technology , and to evaluate its clinical value.
Methods: Sixty-eight children with unilateral DDH were enrolled, and their FNA was measured using 2D-CT and 3D-CT, respectively, by three observers. This procedure was repeated 3 months later. The above measurement outcomes were then compared with the results in the 3D-printed femur (3D-PF) model. The FNA in the 3D-PF model was measured by three observers collectively through electronic angle instrument.
Results: The primary measurement of FNA at the affected hips by 2D-CT was 44.0±6.1, 49.5±8.9 and 52.8±7.9 degrees, respectively. On the 3D-CT, it was 47.6±5.4, 49.3±6.8 and 48.6±6.2 degrees. Three months later, the FNA on 2D-CT was 49.3±10.5, 42.8±7.4 and 45.1±9.3 degrees, and it was 48.0±6.5, 48.9±7.2 and 49.0±5.7 degrees on 3D-CT, respectively. The FNA in the 3D-PF model at the affected and unaffected hips was 48.5±6.6 and 36.9±13.1 degrees. There were significant differences between 2D-CT and 3D-PF measurements, but no significant difference was found between 3D-CT and 3D-PF measurements. The results by 2D-CT showed significant differences among groups and between the groups. However, the results by 3D-CT had no significant differences among groups or between the groups.
Conclusion: The results of our study showed that 3D-CT is a more precise, and reproducible method for FNA measurement in DDH. The FNA at the affected hips is 11.6 degree larger than the unaffected in DDH children aged 3-8 years.
Keywords
femoral neck, anteversion angle, 3D printing technology, CT measurement, hip joint
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View the published article at Journal of Orthopaedic Surgery and Research.
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Editorial decision: Major revision
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Received 25 Mar, 2021
Review #1 received
Received 24 Mar, 2021
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On 22 Mar, 2021
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Received 22 Mar, 2021
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Reviewer #1 agreed
On 22 Mar, 2021
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On 22 Mar, 2021
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Orthopedic Surgery
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A new preprint design is coming!
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See the published version of this preprint at Journal of Orthopaedic Surgery and Research.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Liangbi Xiang
General Hospital of Northern Theatre command
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at Journal of Orthopaedic Surgery and Research.
Version 1
Posted 25 Mar, 2021
No community comments so far
Editorial decision: Major revision
On 26 Mar, 2021
Review #2 received
Received 25 Mar, 2021
Review #1 received
Received 24 Mar, 2021
Reviewer #2 agreed
On 22 Mar, 2021
Reviews received
Received 22 Mar, 2021
Reviewers invited
Invitations sent on 22 Mar, 2021
Reviewer #1 agreed
On 22 Mar, 2021
First submitted
On 22 Mar, 2021
Editor assigned
On 21 Mar, 2021
Submission checks complete
On 21 Mar, 2021
Editor invited
On 21 Mar, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Orthopedic Surgery
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Journal of Orthopaedic Surgery and Research.
Background: Accurate femoral neck anteversion angle (FNA) measurement is of great significance in the diagnosis and treatment of developmental dysplasia of the hip (DDH) in children. The FNA measurement still remains a controversy. We aimed to verify the accuracy of our CT method by 3D printing technology , and to evaluate its clinical value.
Methods: Sixty-eight children with unilateral DDH were enrolled, and their FNA was measured using 2D-CT and 3D-CT, respectively, by three observers. This procedure was repeated 3 months later. The above measurement outcomes were then compared with the results in the 3D-printed femur (3D-PF) model. The FNA in the 3D-PF model was measured by three observers collectively through electronic angle instrument.
Results: The primary measurement of FNA at the affected hips by 2D-CT was 44.0±6.1, 49.5±8.9 and 52.8±7.9 degrees, respectively. On the 3D-CT, it was 47.6±5.4, 49.3±6.8 and 48.6±6.2 degrees. Three months later, the FNA on 2D-CT was 49.3±10.5, 42.8±7.4 and 45.1±9.3 degrees, and it was 48.0±6.5, 48.9±7.2 and 49.0±5.7 degrees on 3D-CT, respectively. The FNA in the 3D-PF model at the affected and unaffected hips was 48.5±6.6 and 36.9±13.1 degrees. There were significant differences between 2D-CT and 3D-PF measurements, but no significant difference was found between 3D-CT and 3D-PF measurements. The results by 2D-CT showed significant differences among groups and between the groups. However, the results by 3D-CT had no significant differences among groups or between the groups.
Conclusion: The results of our study showed that 3D-CT is a more precise, and reproducible method for FNA measurement in DDH. The FNA at the affected hips is 11.6 degree larger than the unaffected in DDH children aged 3-8 years.
Figure 1
Figure 2
Figure 3
Figure 4
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