Incidence of capsular contracture in silicone versus saline cosmetic augmentation mammoplasty: A meta-analysis
- PMID: 19949499
- PMCID: PMC2691025
- DOI: 10.1177/229255030801600403
Incidence of capsular contracture in silicone versus saline cosmetic augmentation mammoplasty: A meta-analysis
Abstract
Introduction: Capsular contracture after augmentation mammoplasty occurs at a rate of 15% to 45%. The purpose of the present study was to determine the effect of implant core type (silicone versus saline) on the rate of capsular contracture in augmentation mammoplasty.
Methods: A systematic review was conducted through a search of three electronic databases. Two reviewers independently scanned titles yielded by the search and identified potentially relevant papers. Inter-reviewer variability and the scientific quality of the articles were assessed. Meta-analysis was performed.
Results: Eighty-eight titles of potential relevance were selected from the 393 articles yielded by the search. Inter-rater agreement for selection of potentially relevant articles was 84% (kappa=0.54). Four comparative studies were included in the analysis. Scientific quality scores of the included studies ranged from 5 of 14 to 9 of 14. Three of the four studies reported a higher rate of capsular contracture in patients with silicone implants. A combined odds ratio calculated on two of the studies found a 2.25-fold increased risk of capsular contracture in patients who received silicone implants. Eight series of patients who received cohesive gel silicone implants reported rates of capsular contracture from 0% to 13.6%.
Conclusions: Higher rates of capsular contracture were found in patients who received silicone implants when compared with those who received saline implants. However, the scientific quality of the comparative studies to date on this subject is poor. Recent series evaluating cohesive gel implants report relatively low rates of capsular contracture. A randomized controlled trial comparing rates of capsular contracture in cohesive gel and saline implants is recommended.
INTRODUCTION :: Le taux de contracture capsulaire consécutive à la mammoplastie d’augmentation se situe entre 15 % et 45 %. Le but de la présente étude était de déterminer l’effet du type de prothèse (silicone vs solution saline) sur le taux de contracture capsulaire consécutive à la mammoplastie d’augmentation.
MÉTHODES :: Les auteurs ont procédé à une revue systématique de trois bases de données. Deux examinateurs ont chacun de leur côté fait un survol des titres générés par l’interrogation et ont sélectionné les articles pertinents. Après une évaluation de la variabilité interexaminateur et de la qualité scientifique des articles, les auteurs ont réalisé une métaanalyse des études rapportées.
RÉSULTATS :: Les auteurs ont retenu 80 titres potentiellement pertinents parmi les 393 articles générés par l’interrogation. Pour ce qui est du choix des articles potentiellement pertinents, l’accord interexaminateur a été de 84 % (κ = 0,54). Quatre études comparatives ont été incluses dans l’analyse. Les scores de qualité scientifique des études incluses variaient de 5 sur 14 à 9 sur 14. Trois des quatre études faisaient état d’un taux de contracture capsulaire plus élevé chez les patientes qui avaient reçu des implants de silicone. Le calcul d'un rapport des cotes combiné de deux des études a révélé un risque 2,25 fois plus grand de contracture capsulaire chez les patientes qui avaient reçu des implants de silicone. Huit séries de patientes ayant reçu des prothèses de gel cohésif de silicone ont présenté des taux de contracture capsulaire allant de 0 % à 13,6 %.
CONCLUSIONS :: Des taux plus élevés de contracture capsulaire ont été observés chez les patientes ayant reçu des prothèses de silicone plutôt que des prothèses de solution saline. Toutefois, la qualité scientifique des études comparatives réalisées sur le sujet à ce jour laisse à désirer. De récentes séries évaluant les prothèses de gel cohésif de silicone révèlent des taux relativement faibles de contracture. Les auteurs recommandent la réalisation d’un essai randomisé et contrôlé comparant les taux de contracture capsulaire associés aux implants de gel cohésif de silicone et de solution saline.
Keywords: Capsular contracture; Meta-analysis; Saline; Silicone; Systematic review.
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