Histopathological evaluation of root canal filling materials for primary teeth

Brazilian Dental Journal

Léa Assed Bezerra Da Silva²  Mário Roberto Leonardo²  Daniela S. B. De Oliveira²  Raquel Assed Bezerra Da Silva²  Alexandra Mussolino De Queiroz²  Patrícia Gatón Hernández¹  Paulo Nelson-filho² 

[1] ,University of São Paulo Ribeirão Preto Dental School Department of Pediatric Clinics, Preventive and Community DentistryRibeirão Preto São Paulo ,Brazil

关键词: Endodontics;    primary teeth;    biocompatibility;    dental cement;    filling;   

DOI  :  10.1590/S0103-64402010000100006

来源: SciELO

【 摘 要 】

This study aimed to assess the response of apical and periapical tissues of dogs' teeth after root canal filling with different materials. Forty roots from dogs' premolars were prepared biomechanically and assigned to 4 groups filled with: Group I: commercial calcium hydroxide and polyethylene glycol-based paste (Calen®) thickened with zinc oxide; Group II: paste composed of iodoform, Rifocort® and camphorated paramonochlorophenol; Group III: zinc oxide-eugenol cement; Group IV: sterile saline. After 30 days, the samples were subjected to histological processing. The histopathological findings revealed that in Groups I and IV the apical and periapical regions exhibited normal appearance, with large number of fibers and cells and no resorption of mineralized tissues. In Group II, mild inflammatory infiltrate and mild edema were observed, with discrete fibrogenesis and bone resorption. Group III showed altered periapical region and thickened periodontal ligament with presence of inflammatory cells and edema. It may be concluded that the Calen paste thickened with zinc oxide yielded the best tissue response, being the most indicated material for root canal filling of primary teeth with pulp vitality.

【 授权许可】

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