Preprint Article Version 1 This version is not peer-reviewed

Standardized in vivo Evaluation of Biocompatibility and Bioresorption of a New Synthetic Membrane for Guided Bone Regeneration

Version 1 : Received: 25 January 2019 / Approved: 29 January 2019 / Online: 29 January 2019 (09:38:04 CET)

A peer-reviewed article of this Preprint also exists.

da Costa Pereira, L.; de Almeida Barros Mourão, C.F.; Neves Novellino Alves, A.T.; Figueiredo de Brito Resende, R.; Pinheiro Guedes de Uzeda, M.J.; Granjeiro, J.M.; Seabra Louro, R.; Diuana Calasans-Maia, M. In Vitro Physico-Chemical Characterization and Standardized In Vivo Evaluation of Biocompatibility of a New Synthetic Membrane for Guided Bone Regeneration. Materials 2019, 12, 1186. da Costa Pereira, L.; de Almeida Barros Mourão, C.F.; Neves Novellino Alves, A.T.; Figueiredo de Brito Resende, R.; Pinheiro Guedes de Uzeda, M.J.; Granjeiro, J.M.; Seabra Louro, R.; Diuana Calasans-Maia, M. In Vitro Physico-Chemical Characterization and Standardized In Vivo Evaluation of Biocompatibility of a New Synthetic Membrane for Guided Bone Regeneration. Materials 2019, 12, 1186.

Journal reference: Materials 2019, 12, 1186
DOI: 10.3390/ma12071186

Abstract

This study aimed to evaluate the physico-chemical properties, biocompatibility and bioabsorption of 3 different new membranes for bone guided regeneration (PLGA associated with hydroxyapatite and beta-TCP) with three thicknesses (200, 500 and 700 µm) implanted in mice subcutaneously. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and the quantification of Carbon, Hidrogen and Nitrogen were used to characterize the physico-chemical properties. One hundred Balb-C mice were divided into 5 experimental groups: Group 1 - Sham (without implantation); Group 2 - 200 μm; Group 3 - 500 μm; Group 4 - 700 μm; and Group 5 - Pratix®. Each group was subdivided into four experimental periods (7, 30, 60 and 90 days). Samples were collected and processed for histological and histomorphometrical evaluation. The membranes showed no moderate or severe tissue reactions in the experimental periods studied. The 500 μm membrane did not show tissue reaction for any experimental periods studied. The 200 μm membrane membranes began to exhibit fragmentation after 30- day, while the 500 and 700 µm membranes started the fragmentation at 90-day. All membranes studied were biocompatible, and the 500µm membrane showed the best results being a promissory membrane for bone guided regeneration.

Subject Areas

Membranes; Polymer; Biocompatibility; Inflammatory cells; Calcium Phosphate

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