title: The critical time-lapse between various restoration placements and subsequent endodontic intervention.
abstract: BACKGROUND
  The purpose of this study was 2-fold: (1) to investigate the critical time-lapse of endodontic intervention subsequent to various restorations and tooth surfaces and (2) to assess and compare the risk factors associated with the restorations, tooth surfaces, and endodontic treatment.
  
  
  METHODS
  A comprehensive computerized analysis of all dental school patients at the Case Western Reserve University School of Dental Medicine who received restorations from 2008-2013 was obtained. Inclusion and exclusion criteria were applied. The sample size was limited to teeth with endodontic treatment completed by the endodontic postgraduate dental clinic. Data collected included restoration type, restored tooth surfaces, tooth type, and the dates of restoration and subsequent endodontic treatment. A 2-sample paired t test (95% confidence interval, P < .05) and pair-wise comparison with Bonferroni corrections were implemented.
  
  
  RESULTS
  The mean time between restoration placement and resultant endodontic intervention was 270 days, with a mean difference of 247-294 days (P < .0001). Further analysis revealed composite resin was 1.91 times more likely than amalgam and 5.69 times more likely than crowns to cause resultant endodontic intervention. Teeth with 2 or more restorative surfaces required endodontic intervention (P < .001).
  
  
  CONCLUSIONS
  Of the patients who required endodontic treatment after restoration placement, the critical time-lapse was 9 months. Composite restorations and teeth with 2 or more restorative surfaces were significantly associated with endodontic treatment. From the results of the current study, we recommended that all dental practitioners should perform a thorough endodontic evaluation and diagnosis before, during, and after all restorative procedures.
authors.affiliation: Department of Endodontics, Case School of Dental Medicine, Dental School University of Missouri-Kansas City, Kansas City, Missouri.
authors.forename: Sarah
authors.initials: S
authors.lastname: Kwang
authors.affiliation: Department of Endodontics, Case School of Dental Medicine, Dental School University of Missouri-Kansas City, Kansas City, Missouri. Electronic address: Axa53@case.edu.
authors.forename: Anita
authors.initials: A
authors.lastname: Aminoshariae
authors.affiliation: Department of Biostatistics, Case School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio.
authors.forename: Jarrod
authors.initials: J
authors.lastname: Harding
authors.affiliation: Department of Endodontics, Case School of Dental Medicine, Dental School University of Missouri-Kansas City, Kansas City, Missouri.
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Montagnese
authors.affiliation: Endodontic Residency Program, Case Western Reserve University, Cleveland, Ohio.
authors.forename: Andre
authors.initials: A
authors.lastname: Mickel
mesh_terms: D003188:Composite Resins / Q000737:chemistry; D003442:Crowns / Q000706:statistics & numerical data; D003723:Dental Amalgam / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000145:classification / Q000706:statistics & numerical data*; D006801:Humans; D012189:Retrospective Studies; D012307:Risk Factors; D012390:Root Canal Therapy / Q000706:statistics & numerical data*; D013997:Time Factors; D014070:Tooth / Q000473:pathology
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D003723:Dental Amalgam
keywords: Endodontics; restorations; restorative procedure; risk period; time-lapse; treatment time