Introduction: Survivorship of TKA is directly related to appropriate alignment and balance. Surgeons should evaluate the biomechanics of knee alignment and determine the proper position of the implant. Malalignment of total knee prostheses has been implicated in few difficulties, including tibiofemoral instability, patellofemoral instability, patellar fracture, stiffness, accelerated polyethylene wear, and implant loosening. The aim of this study is to analyse the long term follow up of functional and radiological results of twenty cases of fixed bearing Total Knee Arthroplasty prospectively done in our institute during the period April 2008 to September 2009. Materials & Methods: This is a prospective study done in our department form 2008-2009 which included total knee arthroplasty done for bicompartmental osteoarthritis without gross deformity. 20 cases were included in the study. The age range was 32 to 65 years. There were 5 male patients and 15 female patients. The accuracy of component position was assessed by mechanical axis restoration, coronal tibio femoral angle, sagittal femoral angle, posterior tibial slope by X-ray and the transepicondylar line-posterior condyle component angle by CT. We used Depuy PFC fixed bearing knee in 17 patients, Stryker knee in 2 patients and Indus knee in 1 patient. Knee society score was used to measure the functional outcome of the surgery. Results: The average postoperative flexion in the rheumatoid group was 105.4 degrees and in the osteoarthritis group was 115.8 degrees. There was no incidence of periprosthetic fractures. No patients had neurological deficit or dislocations. One case had valgus instability postoperatively. In our study all our patients showed an improvement in knee score with mean preop score of 50.4 (range: 46-57) improved to 75.6 (range: 65-88). 2 patients had excellent score (80-100).16 patients had good score (70-79) and 2 patients had fair results (60)(61)(62)(63)(64)(65)(66)(67)(68)(69). No patients had maltracking of patella clinically.one patient with anterior knee pain and two patients with limited flexion post operatively were evaluated with axial view of knee. There were no evidence of patellar tilt or subluxation. No patients had loosening and osteolysis noted around the femoral and tibial components. No implant needed to be revised during the period of study. There was no incidence of superficial or deep infection. Of the 20 patients 18 cases returned to their premorbid condition. Two patients who were rheumatoid has persistent pain. The average follow up was 9.2 years (range 8.4 to 10.7 years). Conclusion: In patients with ideal placement of the components i.e. with mechanical axis and the rotational alignment accurate better knee flexion and knee score was obtained provided other factors are normal. We conclude that the correct positioning of the components both axially and rotationally improves the functional outcome of fixed bearing knee in low demand patients with an excellent long term clinical outcome.
Introduction: Open long bone fractures of lower limb are cumbersome to treat. Because of the increased chances of infection, wound debridement and external fixation is the primary procedure followed by a secondary intramedullary nailing when the wound improves. Pin tract infection, loss of fixation, non union is the most frequently encountered complications of external fixation. These complications have discouraged surgeons all over the world in accepting external fixation as a definitive method of fracture treatment. Secondary intramedullary interlocking nailing provides intramedullary input of cancellous tissue at the fracture site due to reaming and nailing. Aim: To evaluate the factors determining the outcome after secondary nailing in open fractures of lower extremity. Materials and Methods: The prospective cohort study was conducted from October 2017 to April 2020 at Pondicherry Institute of Medical Sciences, Pondicherry, India, 33 patients who had open long bone fractures of lower limb and underwent secondary nailing following external fixation, were evaluated. The patients were followed up for a period of six months. Factors such as age, bone involved, grade of injury, timing of debridement, time interval between external fixation and secondary nailing were analysed to see whether they affect the outcome of secondary nailing of open fractures of long bones. All patients underwent an initial thorough wound debridement and external fixation application. A secondary nailing was done once wound had settled down. Age, gender, bone involved, grade of injury, timing of debridement and timing of secondary nailing were noted for all the patients and patients were followed up at six weeks, three months and six months. Final functional outcome (end of six months) was calculated using Lower Extremity Functional Scale (LEFS) and radiological union (end of six months) was calculated using Radiological Union Scale in Tibial fractures score (RUST). Results: There were no statistically significant differences in RUST/LEFS score at the end of six months, with respect to age (p-value=0.825/0.847), gender (p-value=0.235/0.348), bone involvement (p-value=0.726/0.757), grade of injury (p-value=0.107/0.546) and timing of debridement (p-value=0.117/0.374). The mean RUST scores at six weeks, three months and six months were 4.39, 6.57 and 9.28, respectively. The mean LEFS scores at six weeks, three months and six months were 20.96, 34.92, 49.5, respectively. The radiological union rate in this study was 60.61% at the final follow-up. But patients who underwent secondary nailing with 10 days of primary debridement and external fixation had a statistically significant (p-value) better outcome in terms of RUST (p-value at 3 months=0.045)/LEFS (p-value at 6 months=0.030). Conclusion: The interval between external fixation and secondary nailing was found to be a significant determinant of radiological outcome at three months (p-value at 3 months=0.045) and better functional outcome at six months (p-value at 6 months=0.030) with patients undergoing secondary nailing within 10 days of external fixation having a good final outcome. However, the radiological outcome between the two groups was comparable at six months follow-up.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.