title: Effect of endodontic sealers on tooth color.
abstract: OBJECTIVE
  One of the goals of endodontic treatment is the adequate filling of the root canal,which is often done using gutta-percha and sealer. It has been reported that sealer remnants in the coronary pulp chamber cause tooth color changes. Therefore, this study was designed to examine the effect of endodontic sealer remnants on tooth color, testing the hypothesis that sealers cause coronal color changes.
  
  
  METHODS
  Forty single-rooted human teeth were endodontically treated leaving excess sealer material in the coronary pulp chamber. The specimens were divided into four groups (n = 10) according to the endodontic sealer used (AH, AH Plus; EF, Endofill; EN,endome´ thasoneN; and S26, Sealer 26). Teeth were stored at 37 8C moist environment.Color coordinates (L*a*b*) were measured with a spectrophotometer before endodontic treatment(baseline-control), 24 h and 6 months after treatment. L*a*b* values were used to calculate color changes (DE). Data were statistically analyzed using Kruskal–Wallis and Mann–Whitney-U tests.
  
  
  RESULTS
  Color changes were observed for all groups with S26 and EN producing the greatest mean DE values after 6 months.
  
  
  CONCLUSIONS
  Endodontic sealer remnants affect tooth color confirming the experimental hypothesis.
  
  
  CONCLUSIONS
  This study examined the effect of endodontic sealer remnants on tooth color, and observed that after 6 months, the sealers produced unacceptable color changes.
authors.affiliation: Federal University of Pelotas, Pelotas, RS, Brazil.
authors.forename: Débora Könzgen
authors.initials: DK
authors.lastname: Meincke
authors.forename: Maíra
authors.initials: M
authors.lastname: Prado
authors.forename: Brenda Paula Figueiredo
authors.initials: BP
authors.lastname: Gomes
authors.forename: Alvaro Della
authors.initials: AD
authors.lastname: Bona
authors.forename: Ezilmara Leonor Rolim
authors.initials: EL
authors.lastname: Sousa
mesh_terms: D001729:Bismuth / Q000009:adverse effects; D002126:Calcium Hydroxide / Q000009:adverse effects; D003116:Color; D003907:Dexamethasone / Q000009:adverse effects; D004338:Drug Combinations; D004853:Epoxy Resins / Q000009:adverse effects; D005557:Formaldehyde / Q000009:adverse effects; D006801:Humans; D006813:Humidity; D006854:Hydrocortisone / Q000009:adverse effects; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000009:adverse effects*; D013053:Spectrophotometry / Q000379:methods; D013696:Temperature; D013943:Thymol / Q000009:adverse effects / Q000031:analogs & derivatives; D013997:Time Factors; D014070:Tooth / Q000187:drug effects* / Q000473:pathology; D014075:Tooth Discoloration / Q000139:chemically induced*; D019553:Tooth, Nonvital / Q000473:pathology
chemical_list: D004338:Drug Combinations; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C080620:Sealer 26; C011244:corticosteroid methanetriol mixture; C534916:epoxy resin-based root canal sealer; C074417:Endo-Fill; D005557:Formaldehyde; D013943:Thymol; D003907:Dexamethasone; D002126:Calcium Hydroxide; D001729:Bismuth; D006854:Hydrocortisone