title: Risk Factors for Postoperative Infections After Dental Implant Placement: A Case-Control Study.
abstract: OBJECTIVE
  To determine possible risk factors for postoperative infections after implant surgery, explain their effects on the occurrence of such infections, and assess the relation between postoperative infections and early implant failure.
  
  
  METHODS
  A case-and-control study was performed. Postoperative infections were defined as purulent drainage or fistula in the operated region with pain or tenderness, localized swelling, redness, and heat or fever before prosthetic loading. Bivariate and multivariate analyses of the data were performed.
  
  
  RESULTS
  Eighty-eight outpatients (22 patients in the infection group and 66 controls) were selected. Male gender and submerged healing were meaningfully associated to the development of postoperative infections (bivariate analysis). Healing type and location were the independent variables included in the final logistic regression model. Postoperative infections during the osseointegration period considerably increased the risk of early failure (odds ratio = 78.0; 95% confidence interval, 9.12 to 666.90).
  
  
  CONCLUSIONS
  Patients undergoing dental implant placement in the mandible with submerged healing are more prone to postoperative infections. This complication is relevant because it is associated with a considerable and almost 80-fold increase in the risk of early implant failure.
authors: Professor, Master Degree Program in Oral Surgery and Implantology; Associate Professor, Department of Oral Surgery; Faculty of Dentistry, University of Barcelona; Researcher, IDIBELL Institute, Barcelona, Spain. Electronic address: rui@ruibf.com.
authors: Rui
authors: R
authors: Figueiredo
authors: Fellow, Master Degree Program in Oral Surgery and Implantology, Faculty of Dentistry, University of Barcelona, Barcelona, Spain.
authors: Octavi
authors: O
authors: Camps-Font
authors: Professor, Department of Oral Surgery; Director, Master Degree Program of Oral Surgery and Implantology, Faculty of Dentistry, University of Barcelona; Researcher, IDIBELL Institute, Barcelona, Spain.
authors: Eduard
authors: E
authors: Valmaseda-Castellón
authors: Chair and Professor, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Barcelona; Coordinating Investigator, IDIBELL Institute; Head, Department of Oral and Maxillofacial Surgery, Teknon Medical Center, Barcelona, Spain.
authors: Cosme
authors: C
authors: Gay-Escoda
mesh_terms: D016022:Case-Control Studies; D003757:Dental Implantation / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012307:Risk Factors; D012737:Sex Factors; D013530:Surgical Wound Infection / Q000209:etiology*; D014945:Wound Healing