St. Georg sledge for medial compartment knee replacement: 461 arthroplasties followed for 4 (1-17) years

Ansari, Suhail; Newman, John H.; Ackroyd, C. E.

doi:10.3109/17453679708996257

Cited by 77 publications

(31 citation statements)

References 33 publications

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“…The rate of survival of implants in medial unicompartmental knee replacements is comparable to other reports of both fixed and mobile bearing designs [1,2,5,7,14,18,22,23,26,27] (Table 1). Recent series with a large number of patients have reported higher revision rates for medial unicompartmental replacements [6], but once technical errors and surgeon-related complications were discounted good survival rates were reported [17].…”

Section: Discussionsupporting

confidence: 83%

“…Unicompartmental knee replacements have been reported to be more cost-effective than total knee replacement [24]. Follow-up studies of unicompartmental implants have demonstrated ten year survival rates of 85-98% with revision as the endpoint [1,2,5,7,18,19,23,26,27] ( Table 1). The Miller-Galante unicompartmental knee prosthesis has been reported to have very good survival rates with revision as the endpoint [2,5,19].…”

Section: Introductionmentioning

confidence: 99%

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Unicompartmental knee replacements with Miller-Galante prosthesis: Two to 16-year follow-up of a single surgeon series

John

Mauffrey

May

2010

International Orthopaedics (SICOT)

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We report the outcome of 94 Miller-Galante unicompartmental knee replacements done by a single surgeon over 16 years in a district general hospital in the UK. Patellofemoral arthritis was considered a contraindication only if symptomatic and confirmed on radiography and surgery. Deformity when present was correctable. The mean age at surgery was 66.54 years. The mean followup was 10.8 years (2-16 years). The mean Bristol knee score was 43.1 (28-50); 86% of the patients had good or excellent scores. The average range of flexion was 110.6°( 80-130°); 89% of the knees had an appropriate alignment. Using revision as the endpoint, outcome for every knee was established. The survival rate for medial unicompartmental knee replacements was 94% at ten years and 87% at 15 years. Although the survival rate for the lateral unicompartmental knee replacement was 97% at five years, it dropped to 41% at eight years. Lateral unicompartmental knee replacements formed only 9.6% of all the replacements in this series. The results for medial unicompartmental knee replacements are similar to reports by other authors for similar and mobile bearing designs. Unicompartmental knee replacement results in a more kinematic knee and produces good functional results.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Unicompartmental knee replacements with Miller-Galante prosthesis: Two to 16-year follow-up of a single surgeon series

John

Mauffrey

May

2010

International Orthopaedics (SICOT)

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“…In addition, a manual literature search was performed by reviewing bibliographies and searching peer-reviewed orthopaedic journals for relevant articles. Studies were included in the analysis: (1) if implant breakage was explicitly described following unicompartmental knee arthroplasty (UKA) or total knee arthroplasty (TKA) or primary/revision constrained total knee arthroplasty; (2) if revision rates of the study population were available in the text or calculable from the data presented in the text; and (3) if they were written in English, MEDLINE-listed, and published in peer-reviewed journals. Breakage of the tibial insert was not considered an implant fracture in this study as it could be attributed to wear mechanisms [25].…”

Section: Methodsmentioning

confidence: 99%

The incidence of implant fractures after knee arthroplasty

Gilg

Zeller

Leitner

et al. 2016

Knee Surg Sports Traumatol Arthrosc

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“…Overcorrection of the deformity should be avoided. Many experienced surgeons advocate undercorrection of the mechanical axis by 2-3 [2,4,7,9,18] because overcorrection might result in mediolateral subluxation of the femorotibial articulation or in excessive force on the unresurfaced compartment with early secondary degeneration [5,8].…”

Section: Discussionmentioning

confidence: 99%

Minimally invasive unicompartmental knee replacement with a nonimage-based navigation system

Perlick

Bäthis

Tingart

et al. 2004

International Orthopaedics (SICOT)

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In a prospective study, two groups of 20 unicompartmental knee replacements (UKR) each were operated either using a CT-free navigation system or the conventional minimal invasive technique. Radiographic assessment of postoperative alignment was performed by long-leg coronal and lateral radiographs. The results revealed a significant difference between the two groups in favor of navigation. In the computer-assisted group, 95% of UKRs were in a range of 4-0 varus (mechanical axis) compared with 70% in the conventional group. The only inconvenience was a prolonged operation time (+19 min). Due to the limited exposure, the navigation system is helpful in achieving a more precise component orientation. The danger of overcorrection is diminished by real-time information about the leg axis at each step during the operation.RØsumØ Dans une Øtude prospective, deux groupes de 20 proth ses unicompartimentales de genou ont ØtØ opØrØs soit en utilisant un syst me de navigation sans scanner, soit par une technique mini-invasive habituelle. L'estimation de l'alignement postopØratoire a ØtØ faite avec des grandes radiographies frontales et sagittales coronales. Les rØsultats ont rØvØlØ une diffØrence notable entre les deux groupes en faveur de la navigation. Dans le groupe aidØ par ordinateur, 95% des cas Øtaient dans une gamme de 0 à 4 de varus comparØ à 70% dans le groupe conventionnel. Le seul inconvØnient Øtait un temps d'opØration prolongØ (+19 min). En raison de l'exposition limitØe, le syst me de navigation est utile pour donner une orientation plus prØcise aux implants. Le danger d'hypercorrection est diminuØ par l'information en temps rØel sur l'axe du membre à chaque temps de l'opØration. IntroductionIn several studies, excellent 10-year survivorships of unicompartmental knee replacement (UKR) have been reported [3,4,6]. A major advantage of UKR is that it can be performed through a small incision that need not be extended into the quadriceps tendon [1,16]. Despite the favor of preserving undamaged soft tissue, the surgeon has a reduced overview and is in risk of component malpositioning [8].Recently, navigation systems have been developed to improve the accuracy of component alignment in total knee arthroplasty (TKA), and the first follow-up results of computer-assisted TKA are promising [10,15]. To our knowledge, for computer-assisted UKR, only one study is available in the literature. Jenny et al. [12] reported superior results when using a navigation system in UKR compared with the standard procedure. There are only a few previous papers focussing on postoperative alignment after conventional UKR [11], especially when using a minimally invasive technique [8]. Fisher et al. reported significant differences of the postoperative leg alignment when comparing the results of minimally invasive versus open UKR [8].The aim of this prospective study was to analyze the accuracy of postoperative leg alignment and component orientation in minimally invasive, computer-assisted UKR when using a nonimage-based navigatio...

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St. Georg sledge for medial compartment knee replacement: 461 arthroplasties followed for 4 (1-17) years

Cited by 77 publications

References 33 publications

Unicompartmental knee replacements with Miller-Galante prosthesis: Two to 16-year follow-up of a single surgeon series

Unicompartmental knee replacements with Miller-Galante prosthesis: Two to 16-year follow-up of a single surgeon series

The incidence of implant fractures after knee arthroplasty

Minimally invasive unicompartmental knee replacement with a nonimage-based navigation system

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