title: Tissue characterization following revascularization of immature dog teeth using different disinfection pastes.
abstract: Revascularization of immature teeth with necrotic pulps traditionally involves the use of triple antibiotic paste, which may sometimes lead to undesirable complications. The objective of this study was to assess tissue repair in immature dog teeth with apical periodontitis subjected to revascularization, comparing two different pastes used for root canal disinfection. Apical periodontitis was induced in 30 dog premolars. Teeth were randomly divided into three experimental groups: root canals filled with triple antibiotic paste (n = 10); root canals filled with 1% propolis paste (n = 10); and no medication (n = 10). An additional group (n = 10, no intervention) was used as control. After 7 months, the jaws were histologically evaluated for the following variables: newly formed mineralized tissue (present/absent); vital tissue in the canal space (absent/periodontal ligament-like/pulp-like); apical extension of root (present/absent); and severity of inflammatory process (absent/mild/moderate/severe). There were no statistically significant differences among the experimental groups in new mineralized tissue formation and apical root development. The formation of vital tissue in the canal space, in turn, was statistically different between the triple paste and propolis groups: vital tissues were present in all revascularized teeth disinfected with propolis paste (100%), compared to 71% of those disinfected with the triple paste. Severity of inflammatory process was different between the triple paste and no medication groups. The new tissues formed onto canal walls and in the root canal space showed characteristics of cementum and periodontal ligament, respectively. Propolis may have some advantages over the triple paste for the revascularization of immature teeth.
authors.affiliation: Universidade Federal de Santa Maria - UFSM, School of Dentistry, Department of Stomatology, Santa Maria, RS, Brazil.
authors.forename: Claudia Medianeira Londero
authors.initials: CM
authors.lastname: Pagliarin
authors.affiliation: Universidade Federal de Santa Maria - UFSM, School of Dentistry, Dental Service, Santa Maria, RS, Brazil.
authors.forename: Clacir de Lourdes Dotto
authors.initials: Cde L
authors.lastname: Londero
authors.affiliation: Universidade Federal de Santa Catarina - UFSC, School of Dentistry, Department of Dentistry, Florianópolis, SC, Brazil.
authors.forename: Mara Cristina Santos
authors.initials: MC
authors.lastname: Felippe
authors.affiliation: Universidade Federal de Santa Catarina - UFSC, School of Dentistry, Department of Dentistry, Florianópolis, SC, Brazil.
authors.forename: Wilson Tadeu
authors.initials: WT
authors.lastname: Felippe
authors.affiliation: Universidade Federal de Santa Maria - UFSM, School of Dentistry, Department of Pathology, Santa Maria, RS, Brazil.
authors.forename: Cristiane Cademartori
authors.initials: CC
authors.lastname: Danesi
authors.affiliation: Universidade Luterana do Brazil - ULBRA, School of Dentistry, Department of Endodontics, Canoas, RS, Brazil.
authors.forename: Fernando Branco
authors.initials: FB
authors.lastname: Barletta
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000494:pharmacology* / Q000627:therapeutic use; D003782:Dental Pulp / Q000187:drug effects / Q000503:physiopathology; D003786:Dental Pulp Cavity / Q000187:drug effects / Q000503:physiopathology; D003790:Dental Pulp Necrosis / Q000188:drug therapy* / Q000503:physiopathology; D003804:Dentin / Q000187:drug effects; D004285:Dogs; D048091:Guided Tissue Regeneration / Q000379:methods*; D018919:Neovascularization, Physiologic / Q000187:drug effects*; D009824:Ointments; D010485:Periapical Periodontitis / Q000188:drug therapy* / Q000503:physiopathology; D010513:Periodontal Ligament / Q000187:drug effects; D011429:Propolis / Q000494:pharmacology* / Q000627:therapeutic use; D011897:Random Allocation; D015203:Reproducibility of Results; D012388:Root Canal Irrigants / Q000494:pharmacology* / Q000627:therapeutic use; D013997:Time Factors; D014070:Tooth / Q000098:blood supply*; D019227:Tooth Apex / Q000187:drug effects / Q000503:physiopathology; D014089:Tooth Remineralization / Q000379:methods; D016896:Treatment Outcome
chemical_list: D000890:Anti-Infective Agents; D009824:Ointments; D012388:Root Canal Irrigants; D011429:Propolis