Calcium hydroxide root canal dressing. Histopathological evaluation of periapical repair at different time periods.
The objective of this study was to evaluate periapical and apical repair using calcium hydroxide root canal dressings for different lengths of times in teeth with induced chronic periapical lesions. A total of 61 root canals of maxillary and mandibular premolars from 4 dogs were used. After mechanical preparation of the root canals using the crown-down technique, and 5.25% NaOCl as irrigating solution, the apical foramen was enlarged in all cases. A calcium hydroxide root canal dressing was applied. The control group did not receive a root canal dressing. The animals were killed at 7, 15 or 30 days. After histological preparation, serial sections were stained with hematoxylin-eosin and Mallory's trichrome. The best histopathological results occurred at 15 and 30 days, and the worst results occurred at 7 days and in the control group.
Leonardo
Mario Roberto
MR
Department of Endodontics, School of Dentistry of Araraquara, UNESP, Araraquara, SP, Brazil. secendo@foar.unesp.br
Silveira
Frank Ferreira
FF
Silva
Léa Assed Bezerra da
LA
Tanomaru Filho
Mário
M
Utrilla
Lidia Sabbag
LS
D016301:Alveolar Bone Loss / Q000188:drug therapy; D000818:Animals; D002126:Calcium Hydroxide / Q000008:administration & dosage*; D016009:Chi-Square Distribution; D002908:Chronic Disease; D003739:Dental Cementum / Q000187:drug effects; D004285:Dogs; D010485:Periapical Periodontitis / Q000188:drug therapy*; D010486:Periapical Tissue / Q000187:drug effects*; D010513:Periodontal Ligament / Q000187:drug effects; D012388:Root Canal Irrigants / Q000008:administration & dosage*; D013997:Time Factors; D019227:Tooth Apex / Q000187:drug effects*; D014945:Wound Healing / Q000187:drug effects
D012388:Root Canal Irrigants; D002126:Calcium Hydroxide