Long-term clinical results of the Oxford medial unicompartmental knee arthroplasty

Mercier, Numa; Wimsey, Simon; Saragaglia, D.

doi:10.1007/s00264-009-0869-z

Cited by 85 publications

(48 citation statements)

References 24 publications

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“…The main reasons for its popularity are the minimally invasive surgical (MIS) technique [16] and the reports of the excellent medium-and long-term results, including a high patient satisfaction and good knee joint function [15]. In many patients, the desire for improvement in function often includes the desire to return to sports activities [6].…”

Section: Introductionmentioning

confidence: 99%

Sports activities after medial unicompartmental knee arthroplasty Oxford III—What can we expect?

Pietschmann

Wohlleb

Weber

et al. 2012

International Orthopaedics (SICOT)

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Section: Introductionmentioning

confidence: 99%

Sports activities after medial unicompartmental knee arthroplasty Oxford III—What can we expect?

Pietschmann

Wohlleb

Weber

et al. 2012

International Orthopaedics (SICOT)

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“…[6][7][8][9] However, there has been a resurgence of interest and a major increase in the use of UKA for the treatment of medial compartmental knee osteoarthritis in the past decades. [6,7,[10][11][12][13] In the US market, UKA comprised approximately 1% of all knee arthroplasties in 1996 and 1997, and it increased to 6% in 2000 and 2001. [14] Improved prosthetic design, minimally invasive surgical techniques, and strict patient selection criteria have resulted in improved functional outcomes and survivorship rates.…”

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

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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)

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“…Markel et al, in 2005, and Mercier et al, in 2010, pointed out that implantation of a UKA compared with TKAwas more demanding and less forgiving [29,30]. The technically challenging nature of UKA surgery and difficulties in achieving accurate implant placement may lead to a preference for TKA.…”

Section: Discussionmentioning

confidence: 99%

“…There is no general agreement on the ideal UKA implant alignment, and positioning often depends only on the surgeon's experience and skill level. Even intramedullary guiding systems do not offer optimal reproducible implantation techniques for UKA [29,30]. During UKA implantation, special attention must be paid to avoiding overcorrection, which results in a valgus deformity and may lead to rapid progression of osteoarthritis in the lateral compartment [3,4].…”

Section: Discussionmentioning

confidence: 99%

Computer-assisted unicompartmental knee arthroplasty using dedicated software versus a conventional technique

Manzotti

Cerveri

Pullen

et al. 2013

International Orthopaedics (SICOT)

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Purpose The aim of this study was to retrospectively compare the results of two matched-paired groups of patients who had undergone a medial unicompartmental knee arthroplasty (UKA) performed using either a conventional or a nonimage-guided navigation technique specifically designed for unicompartmental prosthesis implantation. Methods Thirty-one patients with isolated medialcompartment knee arthritis who underwent an isolated navigated UKA were included in the study (group A) and matched with patients who had undergone a conventional medial UKA (group B). The same inclusion criteria were used for both groups. At a minimum of six months, all patients were clinically assessed using the Knee Society Score (KSS) and the Western Ontario and McMaster Osteoarthritis Index (WOMAC) index. Radiographically, the frontal-femoral-component angle, the frontal-tibial-component angle, the hip-knee-ankle angle and the sagittal orientation of components (slopes) were evaluated. Complications related to the implantation technique, length of hospital stay and surgical time were compared. Results At the latest follow-up, no statistically significant differences were seen in the KSS, function scores and WOMAC index between groups. Patients in group B had a statistically significant shorter mean surgical time. Tibial coronal and sagittal alignments were statistically better in the navigated group, with five cases of outliers in the conventional alignment technique group. Postoperative mechanical axis was statistically better aligned in the navigated group, with two cases of overcorrection from varus to valgus in group B. No differences in length of hospital stay or complications related to implantation technique were seen between groups. Conclusion This study shows that a specifically designed UKA-dedicated navigation system results in better implant alignment in UKA surgery. Whether this improved alignment results in better clinical results in the long term has yet to be proven.

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Long-term clinical results of the Oxford medial unicompartmental knee arthroplasty

Abstract: The purposes of this study were to

Cited by 85 publications

References 24 publications

Sports activities after medial unicompartmental knee arthroplasty Oxford III—What can we expect?

Sports activities after medial unicompartmental knee arthroplasty Oxford III—What can we expect?

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

Computer-assisted unicompartmental knee arthroplasty using dedicated software versus a conventional technique

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