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Morphological Measurement of Supracondylar Femur Based on Digital Technology in Chinese Han Population

OBJECTIVE: Relatively few studies have reported on the morphology of the supracondylar femur, which is a fundamental factor affecting prosthetic reconstruction. The objectives of the present study were to measure the morphological parameters of the supracondylar femur, to classify the supracondylar...

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Autores principales: Wang, Lei, Tian, Dong‐mu, Liu, Xin, Zhang, Jian‐feng, Zhao, Li‐ming, He, Xin, Hu, Yong‐cheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons Australia, Ltd 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6594528/
https://www.ncbi.nlm.nih.gov/pubmed/30989820
http://dx.doi.org/10.1111/os.12443
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author Wang, Lei
Tian, Dong‐mu
Liu, Xin
Zhang, Jian‐feng
Zhao, Li‐ming
He, Xin
Hu, Yong‐cheng
author_facet Wang, Lei
Tian, Dong‐mu
Liu, Xin
Zhang, Jian‐feng
Zhao, Li‐ming
He, Xin
Hu, Yong‐cheng
author_sort Wang, Lei
collection PubMed
description OBJECTIVE: Relatively few studies have reported on the morphology of the supracondylar femur, which is a fundamental factor affecting prosthetic reconstruction. The objectives of the present study were to measure the morphological parameters of the supracondylar femur, to classify the supracondylar femur, and to provide theoretical guidance for the development of distal femoral prostheses. METHODS: The study consisted of 82 patients of Han Chinese nationality in North China. There were 57 men and 25 women included in the study, with an average age of 50.9 years (range, 18–87 years). Effective CT data should include a range of more than 10 cm for the distal femur. CT data for the right distal supracondylar femurs was obtained from DICOM files. Results for the cancellous bone and marrow cavity were retained, and information for the cortical bone was erased to obtain information of the lumen. Measurements of the intracortical cavity have not been reported previously. Lumen models were reconstructed with Mimics 17.0 software. The surfaces of the lumen models were smoothed with Geomagic studio 12.0 software. Using the Solidworks 2014 software, we established a 3‐D coordinate system, where variables of the lumen were examined. Correlations between the various measurements were calculated. RESULTS: The supracondylar region of the femur was divided into five levels, and the length, breadth, height, and angle values were measured at each level. There were strong correlations between the length indexes (transverse diameter [EF], medial anteroposterior diameter [AC], middle anteroposterior diameter [GH], and lateral anteroposterior diameter [BD]) and the volume index (V). There were also strong correlations among the length indicators (EF, AC, GH, and BD) in each layer. Angle γ was correlated with the lateral anteroposterior diameter (BD) at L2–L6 layers (r = −0.383, −0.385, −0.296, −0.258, −0.24; all P < 0.05) and with the height index (h) at L4–L6 layers (r = −0.244, −0.385, −0.506; all P < 0.05). The most representative parameters were the medial anteroposterior diameter (AC(2)R(2) = 0.865; AC(6)R(2) = 0.932), the coronal width ratio, and the sagittal width ratio with volume. The analysis found that the lumen shape of flower–top hat accounted for 81% at most. CONCLUSIONS: The supracondylar femur has an asymmetrical structural area. The coronal plane is dominated by a flowerpot‐like morphology, and the sagittal plane is narrowest in the lateral 1/3 and resembles a top‐hat‐like morphology. Our results provide theoretical guidance for developing distal femoral prostheses and for their clinical application.
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spelling pubmed-65945282019-09-10 Morphological Measurement of Supracondylar Femur Based on Digital Technology in Chinese Han Population Wang, Lei Tian, Dong‐mu Liu, Xin Zhang, Jian‐feng Zhao, Li‐ming He, Xin Hu, Yong‐cheng Orthop Surg Scientific Articles OBJECTIVE: Relatively few studies have reported on the morphology of the supracondylar femur, which is a fundamental factor affecting prosthetic reconstruction. The objectives of the present study were to measure the morphological parameters of the supracondylar femur, to classify the supracondylar femur, and to provide theoretical guidance for the development of distal femoral prostheses. METHODS: The study consisted of 82 patients of Han Chinese nationality in North China. There were 57 men and 25 women included in the study, with an average age of 50.9 years (range, 18–87 years). Effective CT data should include a range of more than 10 cm for the distal femur. CT data for the right distal supracondylar femurs was obtained from DICOM files. Results for the cancellous bone and marrow cavity were retained, and information for the cortical bone was erased to obtain information of the lumen. Measurements of the intracortical cavity have not been reported previously. Lumen models were reconstructed with Mimics 17.0 software. The surfaces of the lumen models were smoothed with Geomagic studio 12.0 software. Using the Solidworks 2014 software, we established a 3‐D coordinate system, where variables of the lumen were examined. Correlations between the various measurements were calculated. RESULTS: The supracondylar region of the femur was divided into five levels, and the length, breadth, height, and angle values were measured at each level. There were strong correlations between the length indexes (transverse diameter [EF], medial anteroposterior diameter [AC], middle anteroposterior diameter [GH], and lateral anteroposterior diameter [BD]) and the volume index (V). There were also strong correlations among the length indicators (EF, AC, GH, and BD) in each layer. Angle γ was correlated with the lateral anteroposterior diameter (BD) at L2–L6 layers (r = −0.383, −0.385, −0.296, −0.258, −0.24; all P < 0.05) and with the height index (h) at L4–L6 layers (r = −0.244, −0.385, −0.506; all P < 0.05). The most representative parameters were the medial anteroposterior diameter (AC(2)R(2) = 0.865; AC(6)R(2) = 0.932), the coronal width ratio, and the sagittal width ratio with volume. The analysis found that the lumen shape of flower–top hat accounted for 81% at most. CONCLUSIONS: The supracondylar femur has an asymmetrical structural area. The coronal plane is dominated by a flowerpot‐like morphology, and the sagittal plane is narrowest in the lateral 1/3 and resembles a top‐hat‐like morphology. Our results provide theoretical guidance for developing distal femoral prostheses and for their clinical application. John Wiley & Sons Australia, Ltd 2019-04-16 /pmc/articles/PMC6594528/ /pubmed/30989820 http://dx.doi.org/10.1111/os.12443 Text en © 2019 The Authors. Orthopaedic Surgery published by Chinese Orthopaedic Association and John Wiley & Sons Australia, Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Scientific Articles
Wang, Lei
Tian, Dong‐mu
Liu, Xin
Zhang, Jian‐feng
Zhao, Li‐ming
He, Xin
Hu, Yong‐cheng
Morphological Measurement of Supracondylar Femur Based on Digital Technology in Chinese Han Population
title Morphological Measurement of Supracondylar Femur Based on Digital Technology in Chinese Han Population
title_full Morphological Measurement of Supracondylar Femur Based on Digital Technology in Chinese Han Population
title_fullStr Morphological Measurement of Supracondylar Femur Based on Digital Technology in Chinese Han Population
title_full_unstemmed Morphological Measurement of Supracondylar Femur Based on Digital Technology in Chinese Han Population
title_short Morphological Measurement of Supracondylar Femur Based on Digital Technology in Chinese Han Population
title_sort morphological measurement of supracondylar femur based on digital technology in chinese han population
topic Scientific Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6594528/
https://www.ncbi.nlm.nih.gov/pubmed/30989820
http://dx.doi.org/10.1111/os.12443
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