Factors affecting range of motion after total knee arthroplasty in patients with more than 120 degrees of preoperative flexion angle
Autor: | Yuji Arai, Hisatake Takamiya, Ryu Terauchi, Kazuya Sugitani, Shuji Nakagawa, Keiichiro Ueshima, Toshikazu Kubo |
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Rok vydání: | 2015 |
Předmět: |
musculoskeletal diseases
Male medicine.medical_specialty Knee Joint medicine.medical_treatment Total knee arthroplasty Osteoarthritis Prosthesis Design medicine Humans Orthopedics and Sports Medicine In patient Postoperative Period Range of Motion Articular Arthroplasty Replacement Knee Aged Orthodontics Varus deformity Aged 80 and over Flexion angle business.industry Middle Aged Osteoarthritis Knee musculoskeletal system medicine.disease Arthroplasty body regions Logistic Models Treatment Outcome Orthopedic surgery Surgery Female business Range of motion Knee Prosthesis |
Zdroj: | International orthopaedics. 39(8) |
ISSN: | 1432-5195 |
Popis: | The postoperative flexion angle reportedly shows a positive correlation with the preoperative flexion angle, but in some cases, the postoperative flexion angle decreases in patients with a large preoperative flexion angle. The purpose of this study was to investigate factors affecting the range of motion after total knee arthroplasty (TKA) in patients with a large preoperative flexion angle.The study evaluated 120 knees with more than 120 degrees of preoperative flexion angle that underwent NexGen LPS-Flex mobile bearing. The groups with and without a reduction in the postoperative flexion angle were compared. Also, a logistic regression analysis was performed, where the presence or absence of a reduction in the postoperative flexion angle was the dependent variable and age, sex, body mass index (BMI), preoperative femorotibial angle (FTA), γ angle, δ angle, pre/postoperative change amount in posterior condylar offset (PCO), pre/postoperative change amount in joint line, and pre/postoperative change amount in patellar thickness were independent variables.Those with preoperative FTA of 186° or larger did not have a reduction in the postoperative flexion angle, compared with the angle of 185° or smaller. Those with δ angle of 83° or smaller also did not have a reduction in the postoperative flexion angle, compared with the angle of 84° or larger.Our results showed that preoperative FTA and δ angle had an impact on a reduction in the postoperative flexion angle. The installation angle of the tibial component in the sagittal plane is important. |
Databáze: | OpenAIRE |
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