The effect of timing temporary cements to treat induced pulp necrosis in the teeth of dogs

Pesquisa Veterinária Brasileira

Léslie M. Domingues-falqueiro¹  Jonathan Ferreira¹  Fernanda M. Lopes¹  Agnes Tymoszczenko¹  Marco A. Gioso¹ 

[1] ,Universidade de São Paulo Faculdade de Medicina Veterinária e Zootecnia Departamento de CirurgiaSão Paulo SP ,Brazil

关键词: Apical delta;    endodontic;    gutta-percha;    camphorated paramonochlorophenol;    microorganisms;    dogs;    Delta apical;    endodontia;    guta-percha;    hidróxido de cálcio com paramonoclorofenolcanforado;    microrganismos;    cães;   

DOI  :  10.1590/S0100-736X2007000200006

来源: SciELO

【 摘 要 】

During endodontic therapy (pulpectomy, root canal debridement and root canal filling) microbiological management is a major concern. Bacteria present in dentine tubules, apical foramina and apical delta are causally related to failure of the procedure. Studies have shown that during single session endodontic treatment bacteria remain within dental structures. The aim of the present study was to evaluate endodontic treatment performed as two sessions, using temporary endodontic dressing materials for different periods in four groups of experimental dogs. A total of 80 roots of second and third upper premolar teeth and second, third and fourth lower premolar teeth were divided into four groups. The pulp chamber was opened with burrs and the pulp exposed for 60 days to induce pulpal inflammation and necrosis. Groups II, III and IV were treated with calcium hydroxide plus camphorated paramono-chlorophenol (PMCC) for 7, 15 and 30 days, respectively. In all groups, the root canals were filled with zinc oxide-eugenol and gutta-percha cones. Clinical and radiographical measurements were performed every 2 weeks. After 60 days a small block section containing the teeth, surrounding periapical tissues and the periodontium was removed for histological and microbiological study. Histological analysis revealed intense inflammatory response in all groups. Microbiological analysis showed microbial reduction inversely proportional to the period of time that the intracanal temporary medicament was left in place.

【 授权许可】

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