title: Immediate implants following tooth extraction. A systematic review.
abstract: OBJECTIVE
  The aim of this article is to review the current state of immediate implants, with their pros and contras, and the clinical indications and contraindications.
  
  
  METHODS
  An exhaustive literature search has been carried out in the COCHRANE library and MEDLINE electronic databases from 2004 to November 2009. Randomized clinical trials and clinical trials focused on single implants placed in fresh extraction sockets were included and compared. A meta-analysis could not be performed due to heterogeneity of the data.
  
  
  RESULTS
  Twenty studies out of 135 articles from the initial search were finally included, which summed up a total of 1139 immediate implants with at least a 12-month follow-up. Our results have been compared with other current available papers in the literature reviewed that obtained similar outcomes.
  
  
  CONCLUSIONS
  Immediate implants have predictable results with several advantages over delayed implant placement. However, technical complications have been described regarding this technique. Also, biomaterials may be needed when the jumping distance is greater than 1mm or any bone defect is present.
  
  
  CONCLUSIONS
  Few studies report on success rates rather than survival rates in the literature reviewed. Short-term clinical results were described and results were comparable to those obtained with delayed implant placement. Further long-term, randomized clinical trials are needed to give scientific evidence on the benefits of immediate implants over delayed implant placement.
authors.affiliation: Faculty of Dentistry, Universitat Internacional de Catalunya, Josep Trueta s/n, 08195 Sant Cugat del Vallès, Barcelona, Spain. jordi.om@hotmail.com
authors.forename: J
authors.initials: J
authors.lastname: Ortega-Martínez
authors.forename: T
authors.initials: T
authors.lastname: Pérez-Pascual
authors.forename: S
authors.initials: S
authors.lastname: Mareque-Bueno
authors.forename: F
authors.initials: F
authors.lastname: Hernández-Alfaro
authors.forename: E
authors.initials: E
authors.lastname: Ferrés-Padró
mesh_terms: D003757:Dental Implantation / Q000379:methods*; D006801:Humans; D013997:Time Factors; D014081:Tooth Extraction