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In vitro and in vivo studies of surface-structured implants for bone formation

Authors Xia L, Feng B, Wang P, Ding S, Liu Z, Zhou J, Rong Yu

Received 25 December 2011

Accepted for publication 15 February 2012

Published 11 September 2012 Volume 2012:7 Pages 4873—4881


Review by Single-blind

Peer reviewer comments 2

Lu Xia,1,2 Bo Feng,1 Peizhi Wang,2 Siyang Ding,2 Zhiyuan Liu,1 Jie Zhou,1 Rong Yu1

1Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan; 2Research Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China

Background and methods: Micronanoscale topologies play an important role in implant osteointegration and determine the success of an implant. We investigated the effect of three different implant surface topologies on osteoblast response and bone regeneration. In this study, implants with nanotubes and micropores were used, and implants with flat surfaces were used as the control group.
Results: Our in vitro studies showed that the nanostructured topologies improved the proliferation, differentiation, and development of the osteoblastic phenotype. Histological analysis further revealed that the nanotopology increased cell aggregation at the implant-tissue interfaces and enhanced bone-forming ability. Pushout testing indicated that the nanostructured topology greatly increased the bone-implant interfacial strength within 4 weeks of implantation.
Conclusion: Nanotopography may improve regeneration of bone tissue and shows promise for dental implant applications.

Keywords: osteoblast, osteointegration, titanium, nanostructure, microstructure

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