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Histological Evaluation of a New Beta-Tricalcium Phosphate/Hydroxyapatite/Poly (1-Lactide-Co-Caprolactone) Composite Biomaterial in the Inflammatory Process and Repair of Critical Bone Defects

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Division of Oral Pathology and Cell Biology, Faculdade São Leopoldo Mandic, Campinas 13045-755, Brazil
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Division of Periodontology, Faculdade São Leopoldo Mandic, Campinas 13045-755, Brazil
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Author to whom correspondence should be addressed.
Symmetry 2019, 11(11), 1356; https://doi.org/10.3390/sym11111356
Received: 18 September 2019 / Revised: 24 October 2019 / Accepted: 30 October 2019 / Published: 2 November 2019
Background: The use of biomaterials is commonplace in dentistry for bone regeneration. The aim of this study was to evaluate the performance of a new alloplastic material for bone repair in critical defects and to evaluate the extent of the inflammatory process. Methods: Forty-five New Zealand rabbits were divided into five groups according to evaluation time (7, 14, 30, 60, 120 days), totaling 180 sites with six-millimeter diameter defects in their tibiae. The defects were filled with alloplastic material consisting of poly (lactide-co-caprolactone), beta-tricalcium phosphate, hydroxyapatite and nano-hydroxyapatite (BTPHP) in three different presentations: paste, block, and membrane. Comparisons were established with reference materials, such as Bio-ossTM, Bio-oss CollagenTM, and Bio-gideTM, respectively. The samples were HE-stained and evaluated for inflammatory infiltrate (scored for intensity from 0 to 3) and the presence of newly formed bone at the periphery of the defects. Results: Greater bone formation was observed for the alloplastic material and equivalent inflammatory intensity for both materials, regardless of evaluation time. At 30 days, part of the synthetic biomaterial, regardless of the presentation, was resorbed. Conclusions: We concluded that this novel alloplastic material showed osteoconductive potential, biocompatibility, low inflammatory response, and gradual resorption, thus an alternative strategy for guided bone regeneration. View Full-Text
Keywords: bone regeneration; biomaterials; implantology; alloplastic biomaterials bone regeneration; biomaterials; implantology; alloplastic biomaterials
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Martinez, E.F.; Rodrigues, A.E.A.; Teixeira, L.N.; Esposito, A.R.; Cabrera, W.I.R.; Demasi, A.P.D.; Passador-Santos, F. Histological Evaluation of a New Beta-Tricalcium Phosphate/Hydroxyapatite/Poly (1-Lactide-Co-Caprolactone) Composite Biomaterial in the Inflammatory Process and Repair of Critical Bone Defects. Symmetry 2019, 11, 1356.

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