Calcium hydroxide root canal dressing. Histopathological evaluation of periapical repair at different time periods.

• Autor(a) principal: Leonardo, Mario Roberto
• Data de Publicação: 2002
• Outros Autores: Silveira, Frank Ferreira, Silva, Léa Assed Bezerra da, Tanomaru Filho, Mário, Utrilla, Lidia Sabbag
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.forp.usp.br/bdj/bdj13(1)/trab03131/trab03131.pdf; http://hdl.handle.net/11449/66842
• topic: biomedical and dental materials; calcium hydroxide; animal; cementum; chi square distribution; chronic disease; dog; drug effect; osteolysis; periodontal ligament; periodontium; time; tooth periapical disease; tooth root; wound healing; Alveolar Bone Loss; Animals; Calcium Hydroxide; Chi-Square Distribution; Chronic Disease; Dental Cementum; Dogs; Periapical Periodontitis; Periapical Tissue; Periodontal Ligament; Root Canal Irrigants; Time Factors; Tooth Apex; Wound Healing

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.