Clinical and patient-reported outcomes on a guided-motion bicruciate-substituting total knee system in Chinese patients

Abstract

Introduction: The Journey II bicruciate-substituting total knee arthroplasty (TKA) system is a second-generation guidedmotion knee implant. We looked at the clinical, radiological and patient-reported outcomes in Chinese patients up to 1 year after surgery. Materials and Methods: In total, 124 TKAs in 104 patients who received Journey II TKA in three hospitals under one university healthcare system were recruited. Patients were assessed before surgery, and at 6 months and 1 year after surgery. Patient-reported outcome measures (PROMs) including the new Knee Society score, knee injury and osteoarthritis outcome score and forgotten joint score were recorded prospectively. Radiological outcomes such as change in lower limb alignment and component positioning were also documented. Results: The mean age of the patients was 69 ± 7 years. The mean body mass index was 27 ± 4. All clinical and patientreported outcomes showed significant improvement compared with the preoperative values. The PROMs continued to improve from 6 months to 1 year (p<0.05). The radiological assessments showed satisfactory restoration of mechanical alignment and components positioning. There was no major complication or revision documented. No significant correlation between clinical outcomes and PROMs was found. Conclusion: The second-generation guided-motion bicruciate-substituting total knee implant demonstrated satisfactory short-term outcomes in Chinese patients. The PROMs showed significant improvement up to 1 year after surgery.