Increased mortality with metal-on-metal total hip arthroplasty over long-term follow-up .
This report has been verified
by one or more authors of the
original publication.
OrthoEvidence Journal (OE Journal) - ACE Report
OE Journal. 2017;5(2):6 PLoS One. 2016 Jun 13;11(6):e0156051. doi: 10.1371/journal.pone.0156051. eCollection 201638 randomized controlled trials and 9 observational studies were included in this systematic review and meta-analysis to compare mortality and morbidity rates between metal-on-metal total hip arthroplasty (MOM THA) and non-metal-on-metal THA (non-MOM THA). Results of the meta-analysis indicate no significant differences in mortality rate within 5 years, or from 5-10 years. However, mortality rate was significantly higher among MOM THA groups compared to non-MOM THA groups in studies with >10-year follow-up. Additionally, a trend towards a greater rate of surgical revision was observed in the MOM THA group.
Were the search methods used to find evidence (original research) on the primary question or questions stated?
Was the search for evidence reasonably comprehensive?
Were the criteria used for deciding which studies to include in the overview reported?
Was the bias in the selection of studies avoided?
Were the criteria used for assessing the validity of the included studies reported?
Was the validity of all of the studies referred to in the text assessed with use of appropriate criteria (either in selecting the studies for inclusion or in analyzing the studies that were cited)?
Were the methods used to combine the findings of the relevant studies (to reach a conclusion) reported?
Were the findings of the relevant studies combined appropriately relative to the primary question that the overview addresses?
Were the conclusions made by the author or authors supported by the data and or analysis reported in the overview?
How would you rate the scientific quality of this evidence?
Sì = 1
Incerto = 0,5
Non rilevante = 0
No = 0
La valutazione dei criteri di segnalazione valuta la trasparenza con cui gli autori riportano le caratteristiche metodologiche e sperimentali dello studio all'interno della pubblicazione. La valutazione è suddivisa in cinque categorie che vengono presentate di seguito.
4/4
Introduction
4/4
Accessing Data
4/4
Analysing Data
4/4
Results
3/4
Discussion
Detsky AS, Naylor CD, O'Rourke K, McGeer AJ, L'Abbé KA. J Clin Epidemiol. 1992;45:255-65
L'Indice di Fragilità è uno strumento che aiuta l'interpretazione dei risultati significativi, fornendo una misura della forza di un risultato. L'Indice di Fragilità rappresenta il numero di eventi consecutivi che devono essere aggiunti a un risultato dicotomico per rendere il risultato non più significativo. Un numero piccolo rappresenta un risultato più debole, mentre un numero grande rappresenta un risultato più forte.
Perché questo studio era necessario ora?
Recent observational studies providing long-term follow-up have demonstrated an increased risk of mortality with the first generation of metal-on-metal total hip arthroplasty implants. However, conflicting data has been presented for second-generation metal-on-metal implants. Metal-on-metal total hip arthroplasty implants are still in use today in some settings and a comprehensive meta-analysis is needed to determine the mortality and morbidity of the different generations of MOM THA implants over the long-term.
Qual era la domanda di ricerca principale?
What are the overall mortality and morbidity rates of first- and second-generation metal-on-metal bearings when compared to non-metal-on-metal bearings in primary total hip arthroplasties evaluated in randomized controlled trials and observational studies?
- Mortality risk difference was assessed between MOM THA and non-MOM THA at three different follow-up periods; <5 years, 5-10 years, and >10 years. No significant difference was observed within 5 year follow-up (13 RCTs; RD 0.1% [95%CI -1.3% to 1.0%]) or from 5-10 year follow-up (9; RD 0.7% [95%CI -3.0% to 1.7%]). In studies with >10-year follow-up, a significantly higher rate of mortality was observed among MOM THA groups compared to non-MOM THA groups (3 RCTs/1 Observational; RD 4.4% [95%CI1.4% to 7.4%]).
- Observational studies of first-generation MOM THA demonstrated a trend toward increased mortality compared to non-MOM THA (RR 1.05) This finding was in line with the results from RCTs. Observational studies evaluating second generation MOM demonstrated a decreased risk of mortality for MOM THA compared to non-MOM THA, which was in contrast to long-term results from RCTs.
- Morbidity in the form of surgical complications was reported in 26 RCTs, all evaluating second generation MOM THA in comparison to non-MOM THA. The risk of revision was greater in the MOM group RD: 0.8% [95%CI -0.1% to 1.7%] I-squared 0%, but this difference was not significant.
- The risk of cancer was reported in 4 observational studies: 1 evaluating first generation MOM THA and 3 evaluating second generation MOM THA. The first generation MOM THA demonstrated a greater risk of cancer compared to non-MOM THA, but this increased risk was not significant, while the second generation demonstrated no difference compared to non-MOM THA.
Che cosa devo ricordare di più?
The long-term mortality rates appear to be increased in metal-on-metal total hip arthroplasty compared to non-metal-on-metal hip arthroplasty, while mortality rate within 10 years does not appear to differ significantly. Additionally, the rate of surgical revision appears to be higher with the use of metal-on-metal total hip arthroplasty compared to non-metal-on-metal total hip arthroplasty.
Come influenzerà l'assistenza ai miei pazienti?
The results of this meta-analysis demonstrated a higher rate of mortality with the use of metal-on-metal implants in total hip arthroplasty in randomized controlled trials with long-term follow-up. In addition to the higher rate of mortality, there was a trend towards increased morbidity requiring surgical revision. The result from this study highlights the need for patients who have received a metal-on-metal implant in the past to be closely followed. Additionally, the result of this trial indicates that there is no case for the use of metal-on-metal THA implants due to the increased risk of mortality.
DISCLAIMER
Il contenuto di questa pagina è solo a scopo informativo e non intende sostituire la consulenza, la diagnosi o il trattamento medico professionale. Se ha bisogno di cure mediche, si rivolga sempre al suo medico o al pronto soccorso più vicino. Le opinioni, le convinzioni e i punti di vista espressi dalle persone sui contenuti presenti in questa pagina non riflettono le opinioni, le convinzioni e i punti di vista di OrthoEvidence.
0 di 4 articoli mensili GRATUITI sbloccati
