Early Complications After Minimally Invasive Mobile-Bearing Medial Unicompartmental Knee Arthroplasty

Song, Moo Ho; Kim, Bu-Hwan; Ahn, Seong-Jun; Yoo, Seong Yul; Lee, Min-Soo

doi:10.1016/j.arth.2009.07.012

Cited by 53 publications

(42 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This mode of failure is often regarded as a marker for technical proficiency during the Oxford UKA due to factors such as damage to the medial collateral ligament, impingement from osteophytes, flexion/extension gap imbalance and component malpositioning which results in a wide gap between the tibial and femoral components. 26-28 Our teaching philosophy is to emphasise the risk of such errors to our trainees – this is reflected by the very low overall dislocation rate of 0.6% in this series which compares favourably with a pooled dislocation rate of 1.5% reported for the Oxford UKA in a recent systematic review. 29 Furthermore, the failures in the current study, which tended to occur within the first two years of surgery, did not adversely affect the long-term survival when comparisons were made between trainees and consultants.…”

Section: Discussionsupporting

confidence: 53%

A survival analysis of 1084 knees of the Oxford unicompartmental knee arthroplasty

Bottomley

Jones

Rout

et al. 2016

The Bone & Joint Journal

View full text Add to dashboard Cite

AimsThe aim of this to study was to compare the previously unreported long-term survival outcome of the Oxford medial unicompartmental knee arthroplasty (UKA) performed by trainee surgeons and consultants. Patients and MethodsWe therefore identified a previously unreported cohort of 1084 knees in 947 patients who had a UKA inserted for anteromedial knee arthritis by consultants and surgeons in training, at a tertiary arthroplasty centre and performed survival analysis on the group with revision as the endpoint.ResultsThe ten-year cumulative survival rate for revision or exchange of any part of the prosthetic components was 93.2% (95% confidence interval (CI) 86.1 to 100, number at risk 45). Consultant surgeons had a nine-year cumulative survival rate of 93.9% (95% CI 90.2 to 97.6, number at risk 16). Trainee surgeons had a cumulative nine-year survival rate of 93.0% (95% CI 90.3 to 95.7, number at risk 35). Although there was no differences in implant survival between consultants and trainees (p = 0.30), there was a difference in failure pattern whereby all re-operations performed for bearing dislocation (n = 7), occurred in the trainee group. This accounted for 0.6% of the entire cohort and 15% of the re-operations. ConclusionThis is the largest single series of the Oxford UKA ever reported and demonstrates that good results can be achieved by a heterogeneous group of surgeons, including trainees, if performed within a high-volume centre with considerable experience with the procedure.Cite this article: Bone Joint J 2016;(10 Suppl B):22–7.

show abstract

Section: Discussionsupporting

confidence: 53%

A survival analysis of 1084 knees of the Oxford unicompartmental knee arthroplasty

Bottomley

Jones

Rout

et al. 2016

The Bone & Joint Journal

View full text Add to dashboard Cite

show abstract

“…[6,13,19] This was attributed to strict patient selection, improved prosthetic design, and minimally invasive surgery. [7,13,[21][22][23][24][25] In the present study, the functional outcome of the knee was normal in 51%, nearly normal in 37%, abnormal in 8%, and severely abnormal in 4%. Approximately 98% of the patients were satisfied with the surgery.…”

Section: Discussionmentioning

confidence: 89%

“…[14] Improved prosthetic design, minimally invasive surgical techniques, and strict patient selection criteria have resulted in improved functional outcomes and survivorship rates. [15][16][17][18][19][20][21][22] The advantages of UKA included the preservation of knee kinematics and good range of knee motion that may better suit the need of kneeling in activities of daily living in oriental countries. [6,20] The purpose of this prospective study was to evaluate the functional outcomes of UKA for medial compartment knee arthropathy in Asian patients.…”

mentioning

confidence: 99%

Functional outcomes of uni-knee arthroplasty for medial compartment knee arthropathy in asian patients

Wong¹,

Wang²,

Wang³

et al. 2014

Biomed J

View full text Add to dashboard Cite

Background: Uni-knee arthroplasty (UKA) has shown better knee kinematics and motion that may better suit the activities of daily living in Eastern countries. The purpose of this study was to evaluate the functional outcomes of UKA for medial compartment knee arthropathy in Asian patients. Methods:The study cohort consisted of 48 patients with 51 UK A knees. Only one type of prosthesis was used and all components were cemented. Postoperative management included ambulation with weight bearing, range of motion, and muscle strengthening exercises as tolerated until full recovery. The average follow-up was 52.0 ± 24.0 (range 12-92) months. The evaluation included functional assessment, the Knee Society knee and functional scores, the International Knee Document Committee (IKDC) subjective and objective scores, and radiographs of the knee. Results:The overall clinical outcomes of the knee showed the functional outcome of the knee to be normal in 51%, nearly normal in 37%, abnormal in 8%, and severely abnormal in 4%. The functional activities included stair climbing in 96%, squatting in 76%, jogging in 71% and kneeling in 47%. Three-quarters of the patients were able to kneel for daily activities. Approximately 98% of the patients were satisfied with the operation. The survivorship of the prosthesis was 98% with one revision pending. Radiographic evaluations revealed the components were centered in 82% and off-centered in 18%. Osteoarthritis was 22% preoperative and 27% postoperative for the patellofemoral compartment, and 0% before and 4% after surgery for the lateral compartment. The functional outcomes showed no difference between patients with and without patellofemoral arthritis. The complications included one component malposition and one knee pain of undetermined origin. Conclusions: UKA provides excellent pain relief and restoration of knee function including kneeling, squatting, and sit-to-stand activities that perfectly fit the oriental lifestyle and high patient satisfaction in Asian patients at medium-term follow-up. The complications were rare and the survival rate was 98% at medium-term follow-up. (Biomed J 2014;37:406-410)

show abstract

“…As indicated in the literature, although it has lower complication rates compared to total knee prosthesis, it has unique complications, such as polyethylene wear, polyethylene dislocation, lateral arthrosis, and tibial insufficiency fracture, and these complications are higher in mobile inserted unicondylar prosthesis (17).…”

Section: Discussionmentioning

confidence: 99%

“…Higher physiological joint kinematics and the condition obtained by adaptation are very important, especially when the knee shows extreme flexion, which is required when working in the fields and for religious worshiping practiced on the ground as occurs in Turkish-Japanese societies. Despite this advantage, another important issue with mobile prosthesis is having a long learning curve and having unique complications, such as insert dislocation and impingement (17).…”

Section: Discussionmentioning

confidence: 99%

Which Unicondylar Prosthesis Has Better Mid-Term Results: Fixed or Mobile?

Bülbül¹,

Kuyucu²,

Kara³

et al. 2016

JAREM

View full text Add to dashboard Cite

Objective: Osteoarthritis, which is one of the most common causes of pain and motion loss, is an important medical disease that particularly affects elderly people. Unicondylar knee arthroplasty treatment is still a challenge for obese and/or ACL deficient patients. In addition, surgeons have difficulty in decision making whether to use fixed or mobile bearing designed unicompartmental knee prosthesis. The objective of this study was to evaluate the effect of fixed or mobile insert design prosthesis on the mid-term results of patients that were followed up for 8 years or more.Methods: Between 2003 and 2014, 293 patients were treated with unicondylar knee arthroplasty due to medial gonarthrosis, and 239 patients that we followed up for at least 18 months were included in the study. Nine of the patients (3.7%) underwent bilateral operation, 193 (77.8%) patients were operated with the fixed insert design, and 55 (22.2%) patients were operated with the mobile insert design. A total of 248 knees were evaluated retrospectively. 64±5.32 (68-78), and the mean Knee Society Knee Scoring System (KSS) score was 70.6±3.9 (66-89). The postoperative mean WOMAC value was 97.23±4.02 (92-100) (p<0.05), and the mean KSS score was 92.3±3.94 (85-100) (p<0.05). Results Conclusion:When we compared the fixed and mobile insert design prosthesis, there was no statistically significant difference between the knee scores, but the mobile insert design prosthesis had better flexion degrees. We have observed 97.2% prosthesis survival rates over 8 years. In conclusion, unicondylar knee prosthesis is a good treatment option, with a high success rate for medial knee osteoarthritis. (JAREM 2016; 6: 31-4)

show abstract

Early Complications After Minimally Invasive Mobile-Bearing Medial Unicompartmental Knee Arthroplasty

Cited by 53 publications

References 12 publications

A survival analysis of 1084 knees of the Oxford unicompartmental knee arthroplasty

A survival analysis of 1084 knees of the Oxford unicompartmental knee arthroplasty

Functional outcomes of uni-knee arthroplasty for medial compartment knee arthropathy in asian patients

Which Unicondylar Prosthesis Has Better Mid-Term Results: Fixed or Mobile?

Contact Info

Product

Resources

About