Survivorship analysis of 3234 primary knee arthroplasties implanted over a 26-year period

Pradhan, Nikhil; Gambhir, A K; Porter, Martyn

doi:10.1016/j.knee.2005.06.004

Cited by 62 publications

(21 citation statements)

References 19 publications

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“…Current designs exhibit good results after ten years in vivo (Fetzer et al, 2002;Pradhan et al, 2006). However, concerns remain about the surface wear of UHMWPE (Howling et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Effect of conformity and contact stress on wear in fixed-bearing total knee prostheses

Galvin

Kang

Udofia

et al. 2009

Journal of Biomechanics

100

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“…Current designs exhibit good results after ten years in vivo (Fetzer et al, 2002;Pradhan et al, 2006). However, concerns remain about the surface wear of UHMWPE (Howling et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Effect of conformity and contact stress on wear in fixed-bearing total knee prostheses

Galvin

Kang

Udofia

et al. 2009

Journal of Biomechanics

100

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“…At present long-term reports in the literature describe the original Total Condylar total knee replacement designs and the Anatomic Graduated Component (AGC, Biomet, Warsaw, Indiana) TKR which were implanted over 20 years ago and demonstrate success rates between 91% and 98% at 10 to 26 years. [1][2][3][4][5][6][7][8][9][10][11] Rand and Ilstrup, 12 in 1991, reported the outcome of 9200 TKRs and noted four variables which were significantly associated with excellent long-term survival: a primary TKR, a diagnosis of rheumatoid arthritis, age > 60 years, and the use of a cemented condylar prosthesis with a metal-backed tibial component. In the presence of these variables a survival exceeding 97% was achieved at ten years.…”

mentioning

confidence: 99%

The Anatomical Graduated Component total knee replacement

Ritter¹

2009

The Journal of Bone and Joint Surgery. British volume

110

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The long-term success of total knee replacement is multifactorial, including factors relating to the patient, the operation and the implant. The purpose of this study was to examine the 20-year survival of the cemented Anatomical Graduated Component (AGC) total knee replacement. Between 1983 and 2004, 7760 of these were carried out at our institution. Of these, 6726 knees which received the non-modular metal-backed tibial component with compression-moulded polyethylene and had a minimum two-year follow-up were available for study. In all, 36 knees were followed over 20 years with a survival of the tibial and femoral components together of 97.8% (95% confidence interval (CI) 0.9851 to 0.9677), with no implants being revised for polyethylene wear or osteolysis. Age > 70 was associated with increased survival (99.6%, 95% CI 99.0 to 99.8) (p < 0.0001) but pre-operative valgus alignment reduced survival (95.1%, 95% CI 90.0 to 97.6) (p = 0.0056). Age < 55 (p = 0.129), pre-operative varus alignment (p = 0.707), osteonecrosis (p = 0.06), rheumatoid arthritis (p = 0.247), and gender (p = 0.666) were not statistically associated with failure. We attribute the success of the AGC implant to its relatively unconstrained articular geometry and the durability of a non-modular metal-backed tibial component with compression moulded polyethylene.

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“…27 These measures have not been adopted routinely in the hospitals analyzed in other countries 16,24,25,26 and RTKA. 9,14,19,28 Another factor that helps explain this progress is the relationship between obesity and knee osteoarthritis, 29,30 in the light of the increasing prevalence of obesity among the populations of Western countries that has been observed over the last decade. [29][30][31][32] The present study did not cover this specific variable, nor did it cover other risk factors involved in recommendations for knee arthroplasty surgery in the sample that was evaluated.…”

Section: Gendermentioning

confidence: 99%

Prevalence of knee arthroplasty in the state of São Paulo between 2003 and 2010

et al. 2016

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CONTEXT AND OBJECTIVE: The volume of knee arthroplasty procedures has increased over the last decade. The aim of this study was to estimate the frequency of these procedures performed within the public healthcare system of the state of São Paulo between 2003 and 2010. DESIGN AND SETTING: Cross-sectional study conducted in the state of São Paulo by researchers at Hospital do Servidor Público do Estado de São Paulo. METHODS: A sample of 10,952 patients (7,891 females and 3,061 males) who underwent primary total knee arthroplasty (TKA) and revision of total knee arthroplasty (RTKA) in the state of São Paulo between 2003 and 2010 was evaluated. The patients were cataloged using the public healthcare service's TABNET software. All of the patients presented primary osteoarthritis of the knee. The variables of gender, number of primary TKA procedures and number of RTKA procedures were evaluated. RESULTS: A total of 10,952 TKA procedures were performed (annual average of 1369), of which 9,271 (85%) were TKA and 1,681 (15%), RTKA. Of the TKA procedures, 72% were carried out on females (P < 0.0001), while 70% of the RTKA procedures were on females (P < 0.0001). The average ratio of TKA to RTKA was 5.5:1 (P < 0.0001); the ratios in 2003 and 2010 were 9.0:1 and 4.4:1 (P < 0.0001), respectively. CONCLUSION: The number and frequency of TKA and RTKA procedures increased in the state of São Paulo between 2003 and 2010. This increase was relatively greater in RTKA than in TKA and was predominantly in female patients. Over the last few decades, the rate of increase in the number of elderly people has outstripped the birthrate, 3 and there has been an expansion in the absolute numbers of cases of injury due to OA of the knee. 4 One of the therapeutic options for advanced symptomatic OA is total knee arthroplasty (TKA), which has shown a long-term success rate of 85% for relieving pain and improving function. [4][5][6][7][8][9][10] With the growth of primary TKA in absolute terms, it is reckoned that the frequency of revision TKA (RTKA) surgery will also increase. RESUMO 11The growth rate of TKA surgery has tended to track the progressive aging of the population and, moreover, the recommendations relating to the operative procedure have been extended to bring in patients who, increasingly, are younger and more active. 12,13 On the other hand, obesity continues to increase and can be considered to be a risk factor for TKA and for complications after TKA. 9,11 The cost of the prosthetic implants is one of the main expenses relating to the charge of knee surgery procedures, and the average price for prosthetic knee implants continues to follow the upward trend seen over the last decade. 11,14The increasing prevalence of RTKA surgery is related to sev- OBJECTIVEThe aim of this study was to estimate the frequency of knee Patients who underwent TKA and/or RTKA were assessed.All of these patients were registered in the TABNET software.Partial arthroplasty procedures (unicompartmental and patellofemoral) were excluded. Statistical...

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Survivorship analysis of 3234 primary knee arthroplasties implanted over a 26-year period

Cited by 62 publications

References 19 publications

Effect of conformity and contact stress on wear in fixed-bearing total knee prostheses

Effect of conformity and contact stress on wear in fixed-bearing total knee prostheses

The Anatomical Graduated Component total knee replacement

Prevalence of knee arthroplasty in the state of São Paulo between 2003 and 2010

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