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Human alveolar bone cell proliferation, expression of osteoblastic phenotype, and matrix mineralization on porous titanium produced by powder metallurgy
Author(s) -
Rosa Adalberto Luiz,
Crippa Grasiele Edilaine,
De Oliveira Paulo Tambasco,
Taba Jr Mario,
Lefebvre LouisPhilippe,
Beloti Marcio Mateus
Publication year - 2009
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2008.01662.x
Subject(s) - alkaline phosphatase , osteocalcin , mineralization (soil science) , titanium , materials science , porosity , osteoblast , cell growth , chemical engineering , chemistry , metallurgy , in vitro , biochemistry , composite material , enzyme , organic chemistry , nitrogen , engineering
Objective: This study aimed at investigating the influence of the porous titanium (Ti) structure on the osteogenic cell behaviour. Materials and methods: Porous Ti discs were fabricated by the powder metallurgy process with the pore size typically between 50 and 400 μm and a porosity of 60%. Osteogenic cells obtained from human alveolar bone were cultured until subconfluence and subcultured on dense Ti (control) and porous Ti for periods of up to 17 days. Results: Cultures grown on porous Ti exhibited increased cell proliferation and total protein content, and lower levels of alkaline phosphatase (ALP) activity than on dense Ti. In general, gene expression of osteoblastic markers–runt‐related transcription factor 2, collagen type I, alkaline phosphatase, bone morphogenetic protein‐7, and osteocalcin was lower at day 7 and higher at day 17 in cultures grown on porous Ti compared with dense Ti, a finding consistent with the enhanced growth rate for such cultures. The amount of mineralized matrix was greater on porous Ti compared with the dense one. Conclusion: These results indicate that the porous Ti is an appropriate substrate for osteogenic cell adhesion, proliferation, and production of a mineralized matrix. Because of the three‐dimensional environment it provides, porous Ti should be considered an advantageous substrate for promoting desirable implant surface–bone interactions.