RESUMO
BACKGROUND: With the development of precision medicine, knee replacement under navigation has been paid more and more attention. Precision medicine allows for more accurate implant placement and better limb alignment. However, precision medicine can also make surgery much longer. OBJECTIVE: To evaluate the application of Aesculap Ortho-Pilot non-image-dependent wireless navigation in total knee arthroplasty. METHODS: Data of 42 patients with unilateral knee osteoarthritis admitted to the First Affiliated Hospital of Anhui Medical University from April to November 2017 were retrospectively collected. First total knee arthroplasty was conducted by the same surgeon. According to surgical methods, the patients were divided into two groups: The navigation group (n=21) received a total knee arthroplasty under the assistance of Ortho-Pilot non-image-dependent wireless navigation, and the non-navigation group (n=21) received a regular total knee arthroplasty. Operation time and drainage volume were recorded in both groups. X-ray film of weight bearing was taken 12 months after operation. Mechanical axis of the lower extremity, the mechanical proximal medial proximal angle of the mechanical shaft of the tibia, the distal lateral angle of the femoral mechanical axis, sagittal tibial component angle and the number of alignment deviation of the lower extremity (>3°) were compared between the two groups. Knee range of motion and Hospital for Special Surgery knee score were evaluated. This study was approved by the Ethics Committee of First Affiliated Hospital of Anhui Medical University. RESULTS AND CONCLUSION: (1) Operation time was longer in the navigation group than in the non-navigation group (P 3° and the variables of medial angular separation of proximal end of the mechanical axis of the tibia between the two groups (P > 0.05). (3) At postoperative 12 months, the range of motion was larger in the navigation group than in the non-navigation group (P 0.05). (4) Results suggested that total knee arthroplasty assisted by computer navigation can improve the accuracy of lower limb alignment, accuracy of prosthesis placement and knee range of motion. However, the operation time was improved, so the advantages and disadvantages should be considered comprehensively.
RESUMO
BACKGROUND: Clinical long-term follow-up showed that there is no obvious difference in knee range of motion, 10-15 year prosthesis survival rate, and main clinical manifestations after replacement of posterior cruciate-retaining and posterior stabilized prostheses. However, the debate over the superiority and inferiority of the two knee prostheses remains. OBJECTIVE: To compare the differences of early functional recovery of patients with unilateral knee osteoarthritis after posterior cruciate-retaining and posterior stabilized prosthesis replacement. METHODS: A total of 60 patients with knee osteoarthritis admitted to the First Affiliated Hospital of Anhui Medical University from July 2018 to September 2019 were selected, including 13 males and 47 females, aged 46-83 years old. Of them, 30 patients received posterior cruciate-retaining prosthesis replacement, and 30 patients received posterior stabilized prosthesis replacement. At 3 months after operation and at the last follow-up, joint amnesia score, knee function HSS score, visual analogue scale score, and knee motion range were assessed. The study was approved by the Ethics Committee of the First Affiliated Hospital of Anhui Medical University. RESULTS AND CONCLUSION: (1) Sixty patients were followed up for 5-16 months, and no complications such as periprosthetic infection, loosening, dislocation, or stiffness occurred during the follow-up. (2) At 3 months after surgery and at the last follow-up, joint amnesia score, HSS scores, visual analogue scores, and knee motion range were not significantly different between the two groups (P > 0.05). (3) The results showed that joint amnesia score was not significantly different in early stage after the posterior cruciate-retaining and posterior stabilized prosthesis replacement for unilateral knee osthoarthritis.