Is the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided TKA?

Abstract Background The aim of the present study was to investigate the influence of sagittal femoral bowing on sagittal femoral component alignment, and whether there was correlation between sagittal femoral component alignment and coronal femoral component alignment. Methods We retrospectively rev...

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Autores principales:	Xiaofeng Zhang, Qianjin Wang, Xingquan Xu, Dongyang Chen, Zhengyuan Bao, Yao Yao, Dengxian Wu, Bin Wang, Zhihong Xu, Qing Jiang
Formato:	article
Lenguaje:	EN
Publicado:	BMC 2021
Materias:	Sagittal Coronal Femoral bowing angle Femoral shaft bowing TKA Orthopedic surgery RD701-811 Diseases of the musculoskeletal system RC925-935
Acceso en línea:	https://doaj.org/article/5290cf2194c4401dad1efa61fd78dbd4
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spelling	oai:doaj.org-article:5290cf2194c4401dad1efa61fd78dbd42021-12-05T12:19:19ZIs the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided TKA?10.1186/s13018-021-02822-71749-799Xhttps://doaj.org/article/5290cf2194c4401dad1efa61fd78dbd42021-12-01T00:00:00Zhttps://doi.org/10.1186/s13018-021-02822-7https://doaj.org/toc/1749-799XAbstract Background The aim of the present study was to investigate the influence of sagittal femoral bowing on sagittal femoral component alignment, and whether there was correlation between sagittal femoral component alignment and coronal femoral component alignment. Methods We retrospectively reviewed 77 knees in 71 patients who had undergone primary TKA for advanced osteoarthritis. All surgeries were performed by using a standard medial parapatellar approach. The osteotomy was performed with a conventional technique using an intramedullary rod for the femur and a mechanical extramedullary guiding system for the tibia. All patients enrolled in the study were evaluated with full-length lower extremity load-bearing standing scanograms, and the patients had preoperative and postoperative radiographs of the knees. Coronal femoral bowing angle (cFBA), sagittal femoral bowing angle (sFBA), and postoperatively, mechanical tibiofemoral angle of the knee (mTFA), β angle (femoral component flexion angle) were measured. The radiographic results of both groups were compared using Student's t test. A two-sided Pearson correlation coefficient was obtained to identify the correlations between FBA in the coronal and sagittal planes, as well as FBA and age or BMI, sFBA and β angle, cFBA and mTFA. Comparison of FSB incidence between different genders was made using Chi-square test. The p value < 0.05 indicates a statistically significant difference. Results The mean sFBA, cFBA, β angle, mTFA were 9.34° ± 3.56°(range 1°–16°), 3.25° ± 3.79°(range − 7° to −17°), 3.91° ± 3.15°(range − 1° to −13°), 0.60° ± 1.95°(range − 3° to −6°), respectively. There was no correlation between age and sFBA (CC = 0.192, p = 0.194) or cFBA (CC = 0.192, p = 0.194); similarly, there was no correlation between age and sFBA (CC = 0.067, p = 0.565) or cFBA (CC = 0.069, p = 0.549). The sFBA was correlated with cFBA and β angle (CC = 0.540, p < 0.01; CC = 0.543, p < 0.01, respectively), and the cFBA was correlated with mTFA (CC = 0.430, p < 0.01). There was no significant difference (p = 0.247) of cFBA between the patients with sFSB and the patients without sFSB. Conclusions The current study showed that the sFBA was correlated with cFBA in the patients undergoing TKA and the patients with sFSB usually presented non-cFSB. We also found that sFSB could affect the femoral component alignment in the sagittal plane and cFSB could affect the femoral component alignment in the coronal plane. The sFBA or cFBA was not correlated with age, BMI, or gender.Xiaofeng ZhangQianjin WangXingquan XuDongyang ChenZhengyuan BaoYao YaoDengxian WuBin WangZhihong XuQing JiangBMCarticleSagittalCoronalFemoral bowing angleFemoral shaft bowingTKAOrthopedic surgeryRD701-811Diseases of the musculoskeletal systemRC925-935ENJournal of Orthopaedic Surgery and Research, Vol 16, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Sagittal Coronal Femoral bowing angle Femoral shaft bowing TKA Orthopedic surgery RD701-811 Diseases of the musculoskeletal system RC925-935
spellingShingle	Sagittal Coronal Femoral bowing angle Femoral shaft bowing TKA Orthopedic surgery RD701-811 Diseases of the musculoskeletal system RC925-935 Xiaofeng Zhang Qianjin Wang Xingquan Xu Dongyang Chen Zhengyuan Bao Yao Yao Dengxian Wu Bin Wang Zhihong Xu Qing Jiang Is the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided TKA?
description	Abstract Background The aim of the present study was to investigate the influence of sagittal femoral bowing on sagittal femoral component alignment, and whether there was correlation between sagittal femoral component alignment and coronal femoral component alignment. Methods We retrospectively reviewed 77 knees in 71 patients who had undergone primary TKA for advanced osteoarthritis. All surgeries were performed by using a standard medial parapatellar approach. The osteotomy was performed with a conventional technique using an intramedullary rod for the femur and a mechanical extramedullary guiding system for the tibia. All patients enrolled in the study were evaluated with full-length lower extremity load-bearing standing scanograms, and the patients had preoperative and postoperative radiographs of the knees. Coronal femoral bowing angle (cFBA), sagittal femoral bowing angle (sFBA), and postoperatively, mechanical tibiofemoral angle of the knee (mTFA), β angle (femoral component flexion angle) were measured. The radiographic results of both groups were compared using Student's t test. A two-sided Pearson correlation coefficient was obtained to identify the correlations between FBA in the coronal and sagittal planes, as well as FBA and age or BMI, sFBA and β angle, cFBA and mTFA. Comparison of FSB incidence between different genders was made using Chi-square test. The p value < 0.05 indicates a statistically significant difference. Results The mean sFBA, cFBA, β angle, mTFA were 9.34° ± 3.56°(range 1°–16°), 3.25° ± 3.79°(range − 7° to −17°), 3.91° ± 3.15°(range − 1° to −13°), 0.60° ± 1.95°(range − 3° to −6°), respectively. There was no correlation between age and sFBA (CC = 0.192, p = 0.194) or cFBA (CC = 0.192, p = 0.194); similarly, there was no correlation between age and sFBA (CC = 0.067, p = 0.565) or cFBA (CC = 0.069, p = 0.549). The sFBA was correlated with cFBA and β angle (CC = 0.540, p < 0.01; CC = 0.543, p < 0.01, respectively), and the cFBA was correlated with mTFA (CC = 0.430, p < 0.01). There was no significant difference (p = 0.247) of cFBA between the patients with sFSB and the patients without sFSB. Conclusions The current study showed that the sFBA was correlated with cFBA in the patients undergoing TKA and the patients with sFSB usually presented non-cFSB. We also found that sFSB could affect the femoral component alignment in the sagittal plane and cFSB could affect the femoral component alignment in the coronal plane. The sFBA or cFBA was not correlated with age, BMI, or gender.
format	article
author	Xiaofeng Zhang Qianjin Wang Xingquan Xu Dongyang Chen Zhengyuan Bao Yao Yao Dengxian Wu Bin Wang Zhihong Xu Qing Jiang
author_facet	Xiaofeng Zhang Qianjin Wang Xingquan Xu Dongyang Chen Zhengyuan Bao Yao Yao Dengxian Wu Bin Wang Zhihong Xu Qing Jiang
author_sort	Xiaofeng Zhang
title	Is the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided TKA?
title_short	Is the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided TKA?
title_full	Is the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided TKA?
title_fullStr	Is the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided TKA?
title_full_unstemmed	Is the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided TKA?
title_sort	is the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided tka?
publisher	BMC
publishDate	2021
url	https://doaj.org/article/5290cf2194c4401dad1efa61fd78dbd4
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Is the femoral component flexion affected by the sagittal femoral shaft bowing in conventional intramedullary guided TKA?

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