title: Release of formaldehyde by 4 endodontic sealers.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the release of formaldehyde by some root canal filling materials.
  
  
  METHODS
  Two older endodontic sealers, AH 26 and Endomethasone, and 2 recently available sealers, AH Plus and Top Seal, were analyzed. Infrared and electronic spectroscopy were used to determine formaldehyde content after set of the materials.
  
  
  RESULTS
  Analysis showed that the AH 26 and Endomethasone sealers released formaldehyde. Although the AH Plus and Top Seal sealers have similar chemical composition, they released formaldehyde in a minimal concentration.
  
  
  CONCLUSIONS
  The AH 26 and Endomethasone sealers released formaldehyde after setting; however, a minimum release was observed for the AH Plus and Top Seal sealers.
authors.affiliation: Discipline of Endodontics, School of Dentistry of Araraquara, UNESP, Brazil.
authors.forename: M R
authors.initials: MR
authors.lastname: Leonardo
authors.forename: L A
authors.initials: LA
authors.lastname: Bezerra da Silva
authors.forename: M T
authors.initials: MT
authors.lastname: Filho
authors.forename: R
authors.initials: R
authors.lastname: Santana da Silva
mesh_terms: D000287:Administration, Topical; D000893:Anti-Inflammatory Agents / Q000032:analysis / Q000737:chemistry; D001729:Bismuth / Q000032:analysis / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003907:Dexamethasone / Q000032:analysis / Q000737:chemistry; D004338:Drug Combinations; D004853:Epoxy Resins / Q000032:analysis / Q000737:chemistry; D005404:Fixatives / Q000032:analysis / Q000737:chemistry*; D005557:Formaldehyde / Q000032:analysis / Q000737:chemistry*; D006801:Humans; D006854:Hydrocortisone; D008709:Methenamine / Q000032:analysis / Q000737:chemistry; D011108:Polymers / Q000032:analysis; D012387:Root Canal Filling Materials / Q000032:analysis / Q000737:chemistry*; D012834:Silver / Q000032:analysis / Q000737:chemistry; D013053:Spectrophotometry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013943:Thymol / Q000031:analogs & derivatives / Q000032:analysis / Q000737:chemistry; D014025:Titanium / Q000032:analysis / Q000737:chemistry
chemical_list: D000893:Anti-Inflammatory Agents; D004338:Drug Combinations; D004853:Epoxy Resins; D005404:Fixatives; D011108:Polymers; D012387:Root Canal Filling Materials; C115110:Topseal; C011244:corticosteroid methanetriol mixture; C534916:epoxy resin-based root canal sealer; D005557:Formaldehyde; D013943:Thymol; D012834:Silver; C028044:epoxy resin AH-26; D003907:Dexamethasone; D014025:Titanium; D008709:Methenamine; D001729:Bismuth; D006854:Hydrocortisone; C003043:paraform