title: Factors affecting the decision to replace failed implants: a retrospective study.
abstract: BACKGROUND
  The purpose of the present study was to explore the major factors that can affect the decision to replace failed implants.
  
  
  METHODS
  A retrospective cohort study was conducted on 194 patients who presented following dental implant failure during a 6-year period (2000 to 2006). The collected data included patient characteristics, failed implant characteristics, the anatomic status of the alveolar ridge after failure, and factors affecting the decision to avoid reimplantation. The study group included patients in whom the failed dental implants were replaced, whereas there was no reimplantation in the control group.
  
  
  RESULTS
  Seventy-four patients (135 implants) made up the control group, and 120 patients (157 implants) made up the study group. The mean patient age was higher and the medical status was worse in the control group. The number of failed implants per patient was higher in the control group. The time between the diagnosis of failure and removal and between implant placement and removal were greater in the control group. The chances of a patient with minor bone loss undergoing reimplantation was 20 times greater (odds ratio, 20.4) than a patient with severe bone loss. The main patient-related reasons for avoiding reimplantation were the additional costs (27%), fear of additional pain (17.7%), and fear of a second failure (16.2%).
  
  
  CONCLUSIONS
  The removal of a failing implant as soon as it is diagnosed as hopeless will improve the chances for reimplantation.
authors.affiliation: Department of Oral and Maxillofacial Surgery, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
authors.forename: Ofer
authors.initials: O
authors.lastname: Mardinger
authors.forename: Saheer
authors.initials: S
authors.lastname: Oubaid
authors.forename: Yifat
authors.initials: Y
authors.lastname: Manor
authors.forename: Joseph
authors.initials: J
authors.lastname: Nissan
authors.forename: Gavriel
authors.initials: G
authors.lastname: Chaushu
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000601:surgery; D016025:Bone Transplantation; D015331:Cohort Studies; D003657:Decision Making; D016854:Dental Anxiety / Q000523:psychology; D015921:Dental Implants / Q000191:economics; D019232:Dental Restoration Failure; D004194:Disease; D005260:Female; D016557:Guided Tissue Regeneration, Periodontal; D017048:Health Care Costs; D006801:Humans; D008297:Male; D008875:Middle Aged; D010149:Postoperative Pain / Q000523:psychology; D012008:Recurrence; D012092:Replantation; D019233:Retreatment; D012189:Retrospective Studies; D013997:Time Factors; D055815:Young Adult
chemical_list: D015921:Dental Implants