Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty

Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed...
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Autor*in:	Takashi Kobayashi [verfasserIn] Kazumi Goto [verfasserIn] Masayoshi Otsu [verfasserIn] Kazuhiko Michishita [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Knee arthroplasty Total knee replacement Kinematics

Übergeordnetes Werk:	In: Journal of Experimental Orthopaedics - Wiley, 2015, 10(2023), 1, Seite n/a-n/a
Übergeordnetes Werk:	volume:10 ; year:2023 ; number:1 ; pages:n/a-n/a

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1186/s40634-023-00606-y

Katalog-ID:	DOAJ089248953

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245	1	0	\|a Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty
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520			\|a Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. Level of evidence Level IV.
650		4	\|a Knee arthroplasty
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700	0		\|a Kazuhiko Michishita \|e verfasserin \|4 aut
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allfields	10.1186/s40634-023-00606-y doi (DE-627)DOAJ089248953 (DE-599)DOAJf362196056bc4d8c99c55dcaac80a09d DE-627 ger DE-627 rakwb eng RD701-811 Takashi Kobayashi verfasserin aut Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. Level of evidence Level IV. Knee arthroplasty Total knee replacement Kinematics Orthopedic surgery Kazumi Goto verfasserin aut Masayoshi Otsu verfasserin aut Kazuhiko Michishita verfasserin aut In Journal of Experimental Orthopaedics Wiley, 2015 10(2023), 1, Seite n/a-n/a (DE-627)792130855 (DE-600)2780021-0 21971153 nnns volume:10 year:2023 number:1 pages:n/a-n/a https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/article/f362196056bc4d8c99c55dcaac80a09d kostenfrei https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/toc/2197-1153 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2023 1 n/a-n/a
spelling	10.1186/s40634-023-00606-y doi (DE-627)DOAJ089248953 (DE-599)DOAJf362196056bc4d8c99c55dcaac80a09d DE-627 ger DE-627 rakwb eng RD701-811 Takashi Kobayashi verfasserin aut Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. Level of evidence Level IV. Knee arthroplasty Total knee replacement Kinematics Orthopedic surgery Kazumi Goto verfasserin aut Masayoshi Otsu verfasserin aut Kazuhiko Michishita verfasserin aut In Journal of Experimental Orthopaedics Wiley, 2015 10(2023), 1, Seite n/a-n/a (DE-627)792130855 (DE-600)2780021-0 21971153 nnns volume:10 year:2023 number:1 pages:n/a-n/a https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/article/f362196056bc4d8c99c55dcaac80a09d kostenfrei https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/toc/2197-1153 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2023 1 n/a-n/a
allfields_unstemmed	10.1186/s40634-023-00606-y doi (DE-627)DOAJ089248953 (DE-599)DOAJf362196056bc4d8c99c55dcaac80a09d DE-627 ger DE-627 rakwb eng RD701-811 Takashi Kobayashi verfasserin aut Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. Level of evidence Level IV. Knee arthroplasty Total knee replacement Kinematics Orthopedic surgery Kazumi Goto verfasserin aut Masayoshi Otsu verfasserin aut Kazuhiko Michishita verfasserin aut In Journal of Experimental Orthopaedics Wiley, 2015 10(2023), 1, Seite n/a-n/a (DE-627)792130855 (DE-600)2780021-0 21971153 nnns volume:10 year:2023 number:1 pages:n/a-n/a https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/article/f362196056bc4d8c99c55dcaac80a09d kostenfrei https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/toc/2197-1153 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2023 1 n/a-n/a
allfieldsGer	10.1186/s40634-023-00606-y doi (DE-627)DOAJ089248953 (DE-599)DOAJf362196056bc4d8c99c55dcaac80a09d DE-627 ger DE-627 rakwb eng RD701-811 Takashi Kobayashi verfasserin aut Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. Level of evidence Level IV. Knee arthroplasty Total knee replacement Kinematics Orthopedic surgery Kazumi Goto verfasserin aut Masayoshi Otsu verfasserin aut Kazuhiko Michishita verfasserin aut In Journal of Experimental Orthopaedics Wiley, 2015 10(2023), 1, Seite n/a-n/a (DE-627)792130855 (DE-600)2780021-0 21971153 nnns volume:10 year:2023 number:1 pages:n/a-n/a https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/article/f362196056bc4d8c99c55dcaac80a09d kostenfrei https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/toc/2197-1153 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2023 1 n/a-n/a
allfieldsSound	10.1186/s40634-023-00606-y doi (DE-627)DOAJ089248953 (DE-599)DOAJf362196056bc4d8c99c55dcaac80a09d DE-627 ger DE-627 rakwb eng RD701-811 Takashi Kobayashi verfasserin aut Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. Level of evidence Level IV. Knee arthroplasty Total knee replacement Kinematics Orthopedic surgery Kazumi Goto verfasserin aut Masayoshi Otsu verfasserin aut Kazuhiko Michishita verfasserin aut In Journal of Experimental Orthopaedics Wiley, 2015 10(2023), 1, Seite n/a-n/a (DE-627)792130855 (DE-600)2780021-0 21971153 nnns volume:10 year:2023 number:1 pages:n/a-n/a https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/article/f362196056bc4d8c99c55dcaac80a09d kostenfrei https://doi.org/10.1186/s40634-023-00606-y kostenfrei https://doaj.org/toc/2197-1153 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2023 1 n/a-n/a
language	English
source	In Journal of Experimental Orthopaedics 10(2023), 1, Seite n/a-n/a volume:10 year:2023 number:1 pages:n/a-n/a
sourceStr	In Journal of Experimental Orthopaedics 10(2023), 1, Seite n/a-n/a volume:10 year:2023 number:1 pages:n/a-n/a
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Knee arthroplasty Total knee replacement Kinematics Orthopedic surgery
isfreeaccess_bool	true
container_title	Journal of Experimental Orthopaedics
authorswithroles_txt_mv	Takashi Kobayashi @@aut@@ Kazumi Goto @@aut@@ Masayoshi Otsu @@aut@@ Kazuhiko Michishita @@aut@@
publishDateDaySort_date	2023-01-01T00:00:00Z
hierarchy_top_id	792130855
id	DOAJ089248953
language_de	englisch
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ089248953</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20240413230006.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230505s2023 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1186/s40634-023-00606-y</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ089248953</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJf362196056bc4d8c99c55dcaac80a09d</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">RD701-811</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Takashi Kobayashi</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2023</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. 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callnumber-first	R - Medicine
author	Takashi Kobayashi
spellingShingle	Takashi Kobayashi misc RD701-811 misc Knee arthroplasty misc Total knee replacement misc Kinematics misc Orthopedic surgery Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty
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topic_title	RD701-811 Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty Knee arthroplasty Total knee replacement Kinematics
topic	misc RD701-811 misc Knee arthroplasty misc Total knee replacement misc Kinematics misc Orthopedic surgery
topic_unstemmed	misc RD701-811 misc Knee arthroplasty misc Total knee replacement misc Kinematics misc Orthopedic surgery
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title	Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty
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title_full	Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty
author_sort	Takashi Kobayashi
journal	Journal of Experimental Orthopaedics
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author_browse	Takashi Kobayashi Kazumi Goto Masayoshi Otsu Kazuhiko Michishita
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doi_str_mv	10.1186/s40634-023-00606-y
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title_sort	closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty
callnumber	RD701-811
title_auth	Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty
abstract	Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. Level of evidence Level IV.
abstractGer	Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. Level of evidence Level IV.
abstract_unstemmed	Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. Level of evidence Level IV.
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title_short	Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty
url	https://doi.org/10.1186/s40634-023-00606-y https://doaj.org/article/f362196056bc4d8c99c55dcaac80a09d https://doaj.org/toc/2197-1153
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up_date	2024-07-03T22:05:16.237Z
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fullrecord_marcxml	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ089248953</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20240413230006.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230505s2023 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1186/s40634-023-00606-y</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ089248953</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJf362196056bc4d8c99c55dcaac80a09d</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">RD701-811</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Takashi Kobayashi</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2023</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Purpose Restricted kinematic alignment (rKA) is a modified technique of kinematic alignment (KA) total knee arthroplasty (TKA) for patients with an outlier or atypical knee anatomy, striving to preserve the native knee joint line parallel to the ground in a bipedal stance. This study aimed to evaluate the accuracy of rKA TKA with a computed tomography (CT)‐based patient‐specific instrument (PSI) to achieve the preoperative plan with the joint line parallel to the ground level. Methods Using a CT‐based PSI, 74 closed‐leg standing long‐leg radiographs were obtained before and after rKA TKA. The hip‐knee‐ankle angle (HKA), joint line orientation angle (JLOA), lateral distal femoral angle (LDFA), and medial proximal tibial angle (MPTA) were measured. Bone resection accuracy was evaluated by postoperative HKA deviations from the planned alignment and joint line by postoperative JLOA deviations from the ground level. Results The mean postoperative JLOA and HKA were 2.1° valgus (range, standard deviation: 6.0° valgus to 3.0° varus, 2.0) and 2.6° varus (3.5° valgus to 12.5° varus, 3.2), respectively. Postoperative JLOA and HKA were within ± 3° of the planned alignment for 69% and 86% of cases, respectively. Conclusions Despite a static verification, we clarified how the joint line after rKA TKA was reproduced in the closed‐leg long leg radiographs to mimic the limb position during gait. However, this imaging method is not well‐established, and lack of long‐term survivorship and the relationship between joint line inclination and clinical outcomes represented limitations of this study. 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code="i">In</subfield><subfield code="t">Journal of Experimental Orthopaedics</subfield><subfield code="d">Wiley, 2015</subfield><subfield code="g">10(2023), 1, Seite n/a-n/a</subfield><subfield code="w">(DE-627)792130855</subfield><subfield code="w">(DE-600)2780021-0</subfield><subfield code="x">21971153</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:10</subfield><subfield code="g">year:2023</subfield><subfield code="g">number:1</subfield><subfield code="g">pages:n/a-n/a</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1186/s40634-023-00606-y</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doaj.org/article/f362196056bc4d8c99c55dcaac80a09d</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield 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Closed‐leg standing long leg radiographs can be a useful tool to assess whether the joint line is parallel to the ground in restricted kinematic alignment total knee arthroplasty

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