title: Adult stem cells properties in terms of commitment, aging and biological safety of grit-blasted and Acid-etched ti dental implants surfaces.
abstract: Titanium (Ti) is one of the most widely used biomaterials for manufacturing dental implants. The implant surface properties strongly influence osseointegration. The aim of the present study was to in vitro investigate the characteristics of Ti dental implants in terms of mutagenicity, hemocompatibility, biocompatibility, osteoinductivity and biological safety. The Ames test was used to test the mutagenicity of the Ti dental implants, and the hemolysis assay for evaluating their hemocompatibility. Human adipose - derived stem cells (ADSCs) were then seeded onto these implants in order to evaluate their cytotoxicity. Gene expression analyzing with real-time PCR was carried out to investigate the osteoinductivity of the biomaterials. Finally, the genetic stability of the cells cultured onto dental implants was determined by karyotyping. Our results demonstrated that Ti dental implants are not mutagenic, do not cause hemolysis, and are biocompatible. The MTT assay revealed that ADSCs, seeded on Ti dental implants, proliferate up to 30 days in culture. Moreover, ADSCs loaded on Ti dental implants show a substantial expression of some osteoblast specific markers, such as COL1A1, OPN, ALPL, and RUNX2, as well as chromosomal stability after 30 days of culture in a medium without osteogenic factors. In conclusion, the grit-blasted and acid-etched treatment seems to favor the adhesion and proliferation of ADSCs and improve the osteoinductivity of Ti dental implant surfaces.
authors: Department of Biomedical Sciences, University of Padua, Padua, Italy.
authors: Chiara
authors: C
authors: Gardin
authors: Department of Biomedical Sciences, University of Padua, Padua, Italy.
authors: Letizia
authors: L
authors: Ferroni
authors: Department of Neurosciences, University of Padua, Padua, Italy.
authors: Eriberto
authors: E
authors: Bressan
authors: Department of General Dentistry, Faculty of Medicine and Dentistry, University of Murcia, Murcia, Spain.
authors: José L
authors: JL
authors: Calvo-Guirado
authors: Private Practice, Bologna, Italy.
authors: Marco
authors: M
authors: Degidi
authors: Department of Medical, Oral and Biotechnological Sciences, University of Chieti, Italy.
authors: Adriano
authors: A
authors: Piattelli
authors: Department of Biomedical Sciences, University of Padua, Padua, Italy.
authors: Barbara
authors: B
authors: Zavan
keywords: Titanium dental implants; adipose- derived stem cells; biocompatibility; osteogenic differentiation; surface properties
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