Journal article
Effect of coupling agents on the local mechanical properties of bioactive dental composites by the nano-indentation technique
Dental materials, v 21(7), pp 656-664
Jul 2005
PMID: 15978275
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
To examine the use of nano-indentation as a method of determining the interfacial mechanics of bioactive composites for mandibular bone substitutes.
Three coupling agents (PMMA-MAA, PMMA-MA and silane) were used to treat hydroxyapatite (HA) particles before incorporation into a polymethylmethacrylate (PMMA) matrix. Nano-indentation was used to determine the hardness and Young's modulus on the HA particle surface, at the HA/PMMA interface and in the PMMA matrix region for each of the four groups. In addition bulk four-point bending tests were conducted on each of the four groups as a comparison.
The findings resulted in significant differences in the local interfacial Young's modulus between the polymer-treated composites and the uncoupled control specimens with a marked improvement (50%) in modulus with either polymertreated group. Similarly, the bending modulus of the polymer-treated groups was significantly higher than the un-treated control group; however, these differences were not as pronounced (approximately 15%).
The co-polymer-treated composites resulted in improved interfacial modulus as compared to the un-treated controls and that the nano-indentation technique is a powerful tool for understanding the local interfacial mechanics of bioactive composites.
Metrics
Details
- Title
- Effect of coupling agents on the local mechanical properties of bioactive dental composites by the nano-indentation technique
- Creators
- Emily Ho - Department of Materials Science and Engineering, Drexel University, Lebow Rm. 336, 32 Chestnut Streets, Philadelphia, PA 19104, USAMichele Marcolongo
- Publication Details
- Dental materials, v 21(7), pp 656-664
- Publisher
- Elsevier; England
- Resource Type
- Journal article
- Language
- English
- Web of Science ID
- WOS:000230590000009
- Scopus ID
- 2-s2.0-20644433541
- Other Identifier
- 991014878196104721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Dentistry, Oral Surgery & Medicine
- Materials Science, Biomaterials