Abstract
ObjectiveThe purpose of this study was to explore the mid-and long-term clinical effects of Chinese patients with medial pivot (MP) prosthesis and posterior-stabilized (PS) prosthesis after total knee arthroplasty (TKA), to provide a reference for the recommendation of clinical prostheses.MethodsA retrospective analysis of 802 patients who received TKA was performed from June 2010 to December 2013. A total of 432 patients received a MP prosthesis (MP group) and 375 patients received a PS prosthesis (PS group). Postoperative range of motion (ROM), clinical scores including the knee scoring system (KSS), the Western Ontario and McMaster Universities osteoarthritis index (WOMAC), the forgotten joint score (FJS), and postoperative complications were compared between the two groups.ResultsA total of 527 patients were followed up, including 290 in the MP group and 237 in the PS group. Both groups achieved satisfactory results in terms of KSS score, WOMAC score, and postoperative ROM, which were significantly improved compared with those before surgery, but the difference between the groups was not statistically significant (P > 0.05). The FJS scores of the MP group and the PS group were satisfactory and no significant difference was observed (P = 0.426). Postoperative complications occurred in 5 and 11 patients in the MP group and PS group, respectively.ConclusionThe clinical results of TKA with MP or PS in Chinese patients at mid- and long-term are encouraging, and no significant differences were observed between the two types of prostheses. Studies have also shown that both prostheses are safe for Chinese patients.
Highlights
With the development of the aging population, knee joint degenerative disease has become a global common condition of the elderly
Typical cases of medial pivot (MP) prosthesis and PS prosthesis are presented in Figs. 1 and 2
This study aimed to explore the clinical results of Chinese patients who underwent implantation of MP and PS prostheses for total knee arthroplasty (TKA) at mid- to long-term follow
Summary
With the development of the aging population, knee joint degenerative disease has become a global common condition of the elderly. Total knee arthroplasty (TKA) is the first choice for the treatment of endstage osteoarthrosis [1, 2]. After increased development and improvement, present-day knee joint prostheses can better restore the natural kinematics of the knee joint and have improved the survival rates. Posterior-stabilized (PS) prosthesis is a classic clinical prosthesis, which has the advantages of a clear incision exposure, a simple soft-tissue balance, and a greater range of motion (ROM) of the knee joint [4]. It relies on the femoral cam to improve the rollback, improves the stability of knee joint movement and motion translation, and prevents posterior subluxation [5]. The structure of the cam post may impact the central post, cause patella slip syndrome, and the extent of the osteotomy is large, which introduces difficulties for subsequent revision surgery [6]
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