Bone healing in critical-size defects treated with platelet-rich plasma activated by two different methods. A histologic and histometric study in rat calvaria
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Data
2008-12-01
Autores
Messora, M. R. [UNESP]
Nagata, Maria José Hitomi [UNESP]
Dornelles, Rita Cassia Menegati [UNESP]
Bomfim, Suely Regina Mogami [UNESP]
Furlaneto, F. A. C. [UNESP]
de Melo, L. G. N. [UNESP]
Deliberador, T. M. [UNESP]
Bosco, Álvaro Francisco [UNESP]
Garcia, Valdir Gouveia [UNESP]
Fucini, S. E. [UNESP]
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Editor
Wiley-Blackwell Publishing, Inc
Resumo
The purpose of this study was to analyze histologically the influence of platelet-rich plasma (PRP) coagulated with two different activators on bone healing in surgically created critical-size defects (CSD) in rat calvaria.Forty-eight rats were divided into three groups: C, PRP-C and PRP-T. An 8 mm diameter CSD was created in the calvarium of each animal. In group C, the defect was filled by a blood clot only. In groups PRP-C and PRP-T, the defect was filled with PRP activated with either calcium chloride or thromboplastin solution, respectively. Each group was divided into two subgroups (n = 8 per subgroup) and killed at either 4 or 12 weeks postoperatively. Histologic and histometric analyses were performed. The amount of new bone formed was calculated as a percentage of the total area of the original defect. Percentage data were transformed into arccosine for statistical analysis (analysis of variance, Tukey's post hoc test, p < 0.05).No defect completely regenerated with bone. Group PRP-C had a statistically greater amount of bone formation than groups C and PRP-T at both time points of analysis. No statistically significant differences were observed between groups C and PRP-T.It can be concluded that the type of activator used to initiate PRP clot formation influences its biological effect on bone healing in CSD in rat calvaria.
Descrição
Palavras-chave
platelet-rich plasma, growth factor, coagulant, bone regeneration
Como citar
Journal of Periodontal Research. Malden: Wiley-blackwell Publishing, Inc, v. 43, n. 6, p. 723-729, 2008.