Cementless Porous‐Coated Metaphyseal Sleeves Used for Bone Defects in Revision Total Knee Arthroplasty: Short‐ to Mid‐Term Outcomes

Autor: Junmin Shen, Ti Zhang, Yanchao Zhang, Yu Dong, Yonggang Zhou, Lingfei Guo
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Orthopaedic Surgery, Vol 15, Iss 2, Pp 488-495 (2023)
Druh dokumentu: article
ISSN: 1757-7861
1757-7853
DOI: 10.1111/os.13598
Popis: Objectives While many studies have presented excellent short‐term outcomes of the metaphyseal sleeves used in revision total knee arthroplasty (TKA), currently published mid‐term results remain limited and some controversial issues remain unresolved. The purpose of this study was to investigate clinical and radiographic mid‐term outcomes of the sleeves for the management of metaphyseal bone defects in revision TKAs. Methods From 2015 to 2019, 44 patients (45 knees) who were operated with cementless porous‐coated metaphyseal sleeve in revision TKA were included in this study. Bone defects were assessed according to Anderson Orthopaedic Research Institute Classification. On the tibial side, there were 37 type II and six type III, and with regards to the femur, 15 were type II, and four were type III. Through reviewing electronic records, data were collected, including baseline demographics, operative details, information of prothesis, and complications. Clinical and radiographic evaluations were performed, including Knee Society Scores (KSS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), range of motion (ROM), the radiolucent line, level of joint line, and implant survival rate. Statistical analysis was performed by paired t‐test for clinical and radiographic indexes. Results The mean follow‐up time was 4.4 ± 1.4 years. During surgery, sleeve‐related fractures were encountered in four (8.9%) knees, including incomplete tibial fracture of lateral cortex in one knee and of medial cortex in two knees, and longitudinal femoral metaphyseal fracture in one knee. Unions were achieved in all cases at the final follow‐up. Significant improvements in KSS and WOMAC scores were found at the final follow‐up, respectively, from 83.8 ± 29.1 to 152.9 ± 31.0 (t = −12.146, p
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