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A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling
Published on: May 21, 2020
Enhanced osteoblast response to an equal channel angular pressing-processed pure titanium substrate with microrough
Jin-Woo Park1, Youn-Jeong Kim, Chan Hee Park
1Department of Periodontology, School of Dentistry, Kyungpook National University, 188-1, Samduk 2Ga, Jung-Gu, Daegu 700-412, Republic of Korea. jinwoo@knu.ac.kr
Acta Biomaterialia
|May 12, 2009
Summary
Ultrafine-grain pure titanium processed by equal channel angular pressing (ECAP) shows enhanced osteoblast cell compatibility. Microroughened ECAP titanium surfaces promote better cell attachment, viability, and bone formation compared to conventional titanium.
Area of Science:
- Biomaterials Science
- Materials Engineering
- Cell Biology
Background:
- Titanium and its alloys are widely used in orthopedic implants.
- Surface properties significantly influence implant biocompatibility and osseointegration.
- Developing advanced titanium surface treatments is crucial for improving implant performance.
Purpose of the Study:
- To compare the surface characteristics and in vitro biocompatibility of ultrafine-grain pure titanium produced by equal channel angular pressing (ECAP) with conventional titanium substrates.
- To evaluate the effect of ECAP processing on osteoblast (MC3T3-E1) response, including cell attachment, viability, alkaline phosphatase (ALP) activity, gene expression, and mineralization.
- To assess the potential of ECAP-processed titanium as a superior material for bone regeneration applications.
Main Methods:
- Preparation of ultrafine-grain pure titanium substrates using equal channel angular pressing (ECAP).
- Surface characterization using electron back-scattered diffractometry, scanning electron microscopy, contact angle, surface energy, and optical profilometry.
- In vitro biocompatibility assessment with MC3T3-E1 pre-osteoblast cells, evaluating cell morphology, attachment, viability, ALP activity, gene expression (ALP, osteopontin, osteocalcin) via real-time PCR, and mineralization nodule formation.
Main Results:
- ECAP-processed titanium substrates exhibited lower water contact angles and higher surface energy compared to conventional coarse-grain pure titanium (CP) and Ti-6Al-4V (Ti64).
- Enhanced MC3T3-E1 cell spreading, attachment, viability, and alkaline phosphatase (ALP) activity were observed on ECAP surfaces.
- Cells grown on ECAP surfaces showed significantly higher mRNA levels for ALP, osteopontin, and osteocalcin, along with greater mineralization nodule formation.
Conclusions:
- Microroughened titanium surfaces made from ECAP-processed ultrafine-grain pure titanium demonstrate superior osteoblast cell compatibility.
- ECAP processing enhances the surface properties of titanium, leading to improved biological responses crucial for osseointegration.
- These findings suggest that ECAP-processed titanium holds significant promise for advanced orthopedic and dental implant applications.
