Posteromedial vertical capsulotomy selectively increases the extension gap in posterior stabilized total knee arthroplasty

Purpose In total knee arthroplasty (TKA), it is important to obtain an appropriate flexion–extension gap. The extension gap is expanded by posteromedial vertical capsulotomy (PMVC). This study aimed to evaluate the increase in the extension gap by PMVC using a navigation system. Methods In posterior...

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Bibliographic Details
Published in:Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA sports traumatology, arthroscopy : official journal of the ESSKA, 2020-05, Vol.28 (5), p.1419-1424
Main Authors: Masuda, Shin, Miyazawa, Shinichi, Yuya, Kodama, Kamatski, Yusuke, Tomohito, Hino, Yoshiki, Okazaki, Yuki, Okazaki, Furumatsu, Takayuki, Ozaki, Toshifumi
Format: Article
Language:English
Subjects:
Arthroplasty (knee)
Biomedical materials
Joint surgery
Knee
Medicine
Medicine & Public Health
Navigation systems
Orthopedics
Surgical implants
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Summary:Purpose In total knee arthroplasty (TKA), it is important to obtain an appropriate flexion–extension gap. The extension gap is expanded by posteromedial vertical capsulotomy (PMVC). This study aimed to evaluate the increase in the extension gap by PMVC using a navigation system. Methods In posterior stabilized (PS)-type TKA, PMVC was performed in 37 knees. The medial extension gap at 0° and flexion gap at 90° flexion of the knee joint using the navigation system before and after PMVC were measured. Results The extension gap before the PMVC was 5.3 ± 2.9 mm. After PMVC, the extension gap had significantly increased to 8.0 ± 2.8 mm ( p  
ISSN:0942-2056
1433-7347
DOI:10.1007/s00167-019-05511-5