Kunihito Hirotomi, Shu Takagawa, Yohei Yukizawa, Kengo Harigane, Ken Kumagai, Yuichi Mochida, Yutaka Inaba, Naomi Kobayashi
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引用次数: 0
Abstract
Objectives: Kinematic alignment (KA) in total knee arthroplasty (TKA) has been extensively studied in osteoarthritis (OA) knees but remains unexplored in rheumatoid arthritis (RA) knees. We compared the coronal and rotational alignments in knees with RA and OA.
Methods: In total, 433 patients (69 with RA and 364 with OA) who underwent TKA were included. The hip-knee-ankle angle HKA), lateral distal femoral angle LDFA), medial proximal tibia angle (MPTA), and coronal plane alignment of the knee (CPAK) classification were measured using full length anteroposterior radiographs. The difference between the posterior condylar axis (PCA) and surgical epicondylar axis (SEA) angle was measured with computed tomography.
Results: Patients with RA exhibited different CPAK classifications compared to those with OA. The mean PCA-SEA was significantly different between the RA and OA groups. Furthermore, the RA group had significantly larger HKA, smaller LDFA, and larger MPTA compared to the OA group.
Conclusions: CPAK classification distribution between patients with RA and OA were different. The average PCA-SEA for RA is larger than that for OA, warranting caution of the complications associated with internal rotation placement. Understanding these differences allows for the consideration of RA knee characteristics and informs future evaluations of KA techniques.
期刊介绍:
Modern Rheumatology publishes original papers in English on research pertinent to rheumatology and associated areas such as pathology, physiology, clinical immunology, microbiology, biochemistry, experimental animal models, pharmacology, and orthopedic surgery.
Occasional reviews of topics which may be of wide interest to the readership will be accepted. In addition, concise papers of special scientific importance that represent definitive and original studies will be considered.
Modern Rheumatology is currently indexed in Science Citation Index Expanded (SciSearch), Journal Citation Reports/Science Edition, PubMed/Medline, SCOPUS, EMBASE, Chemical Abstracts Service (CAS), Google Scholar, EBSCO, CSA, Academic OneFile, Current Abstracts, Elsevier Biobase, Gale, Health Reference Center Academic, OCLC, SCImago, Summon by Serial Solutions