Abstract
ObjectiveTo analyze the effect of sacrificing the posterior cruciate ligament (PCL) on the early postoperative outcome of cruciate retaining (CR) highly congruent rotating platform TKA.MethodsFrom May 2018 to September 2019, 105 cases of total knee arthroplasty (TKA) with CR highly congruent rotating platform prosthesis were retrospectively analyzed. According to the tension of posterior cruciate ligament, they were divided into sacrifice group (29 cases, 27.6%) and retention group (76 cases, 72.4%). Preoperative and postoperative The Hospital for Special Surgery (HSS) score, range of motion (ROM) were compared between the two groups. In addition, postoperative infection, prosthesis loosening, bearing dislocation, and other complications were also compared.ResultsAll patients were followed up for 11~24 months (mean 18.14 ± 3.52) months. There was no significant difference in general data, preoperative HSS score, and ROM between the two groups (P > 0.05). At the last follow-up, HSS score and ROM of the two groups were better than those before operation (P < 0.05). However, there was no significant difference between the two groups (P > 0.05). Moreover, there were no complications such as infection, loosening of prosthesis, and bearing dislocation in all cases.ConclusionIn CR, highly congruent rotating platform TKA with or without tension of the PCL can achieve satisfactory outcomes. Tension-free PCL do not cause joint instability.
Highlights
Total knee arthroplasty is the first choice for the treatment of end-stage knee osteoarthritis
We found that the posterior cruciate ligament (PCL) completely lost tension, this did not affect the stability of the prosthesis
According to the continuity of PCL and tension after release, the patients were divided into sacrifice group (29 cases, 27.6%) and retention group (76 cases, 72.4%). (The tension of the PCL was mainly judged by the surgeon through observing and touching the PCL.) There was no significant difference in general data between the two groups (Table 1)
Summary
Total knee arthroplasty is the first choice for the treatment of end-stage knee osteoarthritis. In the cruciate retaining (CR) highly congruent rotating platform TKA, the excessive tension of the PCL and the tight flexion gap can lead to the bearing dislocation [1]. In this case, the PCL needs to be released as to reduce the tension. Stronach [2] reported that sacrificing the PCL did not cause dysfunction of the CR highly congruent fixed platform prosthesis. It has not been reported the effect of sacrificing the PCL on the knee function after
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