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| Author(s): |
Eliana Aparecida Caliente
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Araçatuba. 2016-09-22. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Odontologia. Araçatuba |
| Defense date: | 2016-08-26 |
| Advisor: | Maria José Hitomi Nagata |
| Abstract | |
This study evaluated the influence of bone marrow aspirate (BMA) and platelet-rich plasma (PRP) combined or not with the autogenous bone (AB) graft on bone healing in surgically created critical-size defects (CSD) in rat calvaria. 96 rats were divided into 6 groups: C, PRP, BMA, AB, PRP/AB and BMA/AB. A 5 mm diameter CSD was created in the calvarium of each animal. In Group C, the defect was filled by blood clot only. In groups PRP and BMA, the defects were filled with PRP and BMA, respectively. In Group AB, the defect was filled with AB graft. In groups PRP/AB and BMA/AB, the defect was filled with AB graft combined with PRP or BMA, respectively. Animals were euthanized at either 10 or 30 days postoperative. Histomorphometric and immunohistochemical analyses were performed. Bone area (BA) was calculated as a percentage of the total area of the original defect. Proliferating cell nuclear antigen (PCNA), bone morphogenetic protein 2/4 (BMP-2/4) and osteocalcin (OCN) immunohistochemical staining were performed. PCNA-positive, BMP-2/4-positive and OCN-positive cells were quantified. Data were statistically analyzed. At 10 days, groups AB, PRP/AB and BMA/AB presented significantly greater BA than control; and group PRP/AB presented greater BA, as well as significantly higher numbers of PCNA-positive and BMP-2/4-positive cells than group AB. At 30 days, the favorable results of groups AB, PRP/AB and BMA/AB on bone healing were also observed; and group BMA/AB presented greater BA, as well as significantly higher number of OCN-positive cells than group AB. In addition, group BMA presented significantly greater BA than control and similar to groups AB and PRP/AB but lower than group BMA/AB. Group BMA presented significantly higher numbers of PCNA-positive, BMP-2/4-positive, and OCN-positive cells than control and PRP/AB. It can be concluded that, at 10 days, the combination of PRP/AB promoted greater BA in CSD in rat calvaria when compared to control or either treatment alone; while, at 30 days, the combination of BMA/AB promoted greater BA than control or either treatment alone. The treatment with BMA only yielded BA similar to that obtained with the treatment with AB graft only at 30 days. Significantly differences in BA were not observed between groups treated with PRP/AB or BMA/AB at both periods of analysis; however, a more advanced bone healing process was observed in group BMA/AB at 30 days. (AU) | |
| FAPESP's process: | 14/01823-3 - Bone marrow aspirate and platelet-rich plasma combined or not with autogenous bone graft on bone healing: a histomorphometric and immunohistochemical study |
| Grantee: | Eliana Aparecida Caliente |
| Support Opportunities: | Scholarships in Brazil - Master |