title: Comparison between two thermoplastic root canal obturation techniques regarding extrusion of root canal filling--a retrospective in vivo study.
abstract: OBJECTIVE
  The aim of this study was to compare two different thermoplastic techniques--a core-carrier technique (Thermafil) and warm vertical compaction--in terms of overextension of root canal filling in vivo.
  
  
  METHODS
  Flaring of 88 teeth was conducted using Pro Files .04 as finishing files, and the teeth were obturated using Thermafil. Flaring of 74 teeth was performed using Pro Files .06 as finishing files, and the teeth were obturated using warm vertical compaction.
  
  
  RESULTS
  Seventy (80 %) of the teeth obturated using Thermafil and 31 (42 %) teeth obturated using warm vertical compaction show extruded root canal filling. In contrast to Thermafil, there is a higher rate of extruded root canal filling of teeth with more than one root canal using warm vertical compaction.
  
  
  CONCLUSIONS
  Thermafil demonstrated a higher rate of extruded root canal filling compared to warm vertical compaction. Warm vertical compaction is a more predictable method of filling compared to Thermafil.
  
  
  CONCLUSIONS
  Root canal filling extrusion will cause irritation of the surrounding tissue and impair repair processes. In the present in vivo study, there was a higher rate of root canal filling extrusion using Thermafil compared to warm vertical compaction.
authors.affiliation: Department of Operative Dentistry and Periodontology, University of Freiburg-Medical Center, Hugstetter Str. 55, 79106 Freiburg im Breisgau, Germany. christian.tennert@uniklinik-freiburg.de
authors.forename: Christian
authors.initials: C
authors.lastname: Tennert
authors.forename: Ingo Lars
authors.initials: IL
authors.lastname: Jungbäck
authors.forename: Karl-Thomas
authors.initials: KT
authors.lastname: Wrbas
mesh_terms: D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003786:Dental Pulp Cavity / Q000473:pathology; D003793:Dental Restoration, Permanent / Q000379:methods; D004492:Edetic Acid / Q000627:therapeutic use; D004853:Epoxy Resins / Q000627:therapeutic use; D005547:Foreign Bodies / Q000000981:diagnostic imaging / Q000209:etiology*; D006171:Gutta-Percha / Q000009:adverse effects / Q000627:therapeutic use*; D006358:Hot Temperature; D006801:Humans; D010486:Periapical Tissue / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography; D019279:Resin Cements / Q000737:chemistry; D012189:Retrospective Studies; D012387:Root Canal Filling Materials / Q000009:adverse effects / Q000627:therapeutic use*; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D019227:Tooth Apex / Q000473:pathology
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D004853:Epoxy Resins; C444701:Filtek Z250; C469607:OptiBond FL; D019279:Resin Cements; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; C534916:epoxy resin-based root canal sealer; D006171:Gutta-Percha; D004492:Edetic Acid; D012973:Sodium Hypochlorite