title: Effect of root canal status on periodontal healing after surgical injury in dogs.
abstract: This study was carried out to observe if the status of the root canal might influence the healing process of surgically prepared experimental periodontal lesions. Forty tooth roots from four dogs were divided into four different groups: a) root canals with vital pulps, b) root canals open to the oral environment, c) root canals infected and filled with zinc oxide eugenol cement, and d) root canals infected and filled with calcium hydroxide. By means of a surgical intervention, a cavity was prepared in the medium portion of the roots. Six months later, the specimens were removed and prepared for histological analysis. The results, which were submitted to statistical analysis, showed that the status of the root canals influenced the healing process of the experimental periodontal lesions. In the groups where the root canals were filled, calcium hydroxide gave the best results. In the group with root canals left open to the oral environment, resorption of the dentin of the experimental cavities, was the most obvious observation. However, it did not prevent the repair process, only slowed it down.
authors.affiliation: Department of Endodontics, UNESP, Araçatuba São Paulo, Brazil.
authors.forename: R
authors.initials: R
authors.lastname: Holland
authors.forename: J A
authors.initials: JA
authors.lastname: Otoboni Filho
authors.forename: P F
authors.initials: PF
authors.lastname: Bernabé
authors.forename: M J
authors.initials: MJ
authors.lastname: Nery
authors.forename: V
authors.initials: V
authors.lastname: de Souza
authors.forename: A
authors.initials: A
authors.lastname: Berbert
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D002126:Calcium Hydroxide / Q000494:pharmacology; D003739:Dental Cementum / Q000503:physiopathology; D003786:Dental Pulp Cavity / Q000503:physiopathology*; D003809:Dentin, Secondary; D004285:Dogs; D010510:Periodontal Diseases / Q000503:physiopathology*; D010513:Periodontal Ligament / Q000503:physiopathology; D012387:Root Canal Filling Materials / Q000494:pharmacology*; D012390:Root Canal Therapy / Q000009:adverse effects; D014945:Wound Healing / Q000187:drug effects / Q000502:physiology*; D015035:Zinc Oxide-Eugenol Cement / Q000494:pharmacology
chemical_list: D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; D002126:Calcium Hydroxide