Dr. Ouellette’s primary expertise is in the assessment and characterization of fretting corrosion in metallic biomaterials, with a focus on modular junctions in total hip replacements. Specifically, his work has utilized electrochemical and mechanical testing of modular tapers, and evaluating the design, material, and surgical factors that may affect mechanically assisted corrosion processes at the taper junction. He has proficiency in developing test methods aimed at the simultaneous measurement of the micromechanical and electrochemical behavior at the taper junction. He also has experience with a wide array of materials characterization techniques, examining metallic and polymeric materials at the bulk and microstructural levels.
Prior to joining Exponent, Dr. Ouellette earned his Ph.D. in Bioengineering from Syracuse University working in the lab of Dr. Jeremy Gilbert. In addition to his efforts to better characterize fretting corrosion processes of modular tapers, he designed a custom-built melt-spinning device to produce polymeric fibers, and explored the structure-processing-property relationships of melt-spun PEEK fibers intended for orthopaedic applications. He developed and characterized novel thin film self-reinforced composite (SRC-) PEEK and UHMWPE for use in modular taper junctions to prevent the onset of mechanically assisted corrosion. He evaluated the micromechanical and electrochemical performance of SRC-PEEK and SRC-PE with pin-on-disk fretting corrosion test methods. He also developed a series of in vitro mechanical and electrochemical test methods to evaluate the performance of modular taper junctions modified with SRCs in comparison with traditional metal tapers, showing that their use prevented any onset of fretting corrosion at the taper junction. Dr. Ouellette conducted a study investigating the correlation of molecular weight and mechanical properties of novel two-solution bone cements. He has also developed in vitro test methods to directly measure the seating mechanics of modular tapers in an effort to better characterize and predict their eventual fretting corrosion behavior.
Dr. Ouellette has published papers and presented talks and posters at a number of conferences in subjects ranging from total hip replacements, fretting corrosion studies, biomechanical testing, materials characterization, polymer processing, composite processing and characterization, microstructural and surface characterization, mechanical testing, and microscopy.
CREDENTIALS & PROFESSIONAL HONORS
- Ph.D., Bioengineering , Syracuse University, 2016
- B.S., Bioengineering, Syracuse University, 2010
Ouellette ES, Gilbert JL. Production and characterization of Melt-Spun Poly (Ether Ether Ketone) fibers for biomedical applications. Polymer 2015; 63:10-18.
Ouellette ES, Gilbert JL. Properties and corrosion performance of self-reinforced composite PEEK for proposed use as a modular taper gasket. Clinical Orthopedics and Related Research, Symposium: Advances in PEEK Technology, 1-14; 2016.
Ouellette ES, Gilbert JL. Production and characterization of Melt-Spun Poly (Ether Ether Ketone) fibers for biomedical applications. Proceedings, Society for Biomaterials Annual Meeting, Boston, MA, April 2013.
Ouellette ES, Shenoy A, Gilbert JL. Influence of seating load, loading rate, and design parameters on the connection strength of modular tapers. Proceedings at World Biomaterials Congress, May, 2016.
Ouellette ES, Gilbert JL. Thin film self-reinforced composite PEEK: Characterization and evaluation as a potential orthopedic biomaterial. Proceedings at 2nd International PEEK Meeting, Washington DC, April, 2015.
Ouellette ES, Gilbert JL. Self-reinforced composites for prevention of fretting corrosion of biomedical alloys: Electrochemistry and surface characterization. Proceedings, Society for Biomaterials Annual Meeting, Denver, CO, April 2014.
Sivan SS, Ouellette ES, Gilbert JL. Cathodic voltage preconditioning of Ti-6Al-4V in media affects MC3T3 pre-osteoblast cell viability. Proceedings, Society for Biomaterials Annual Meeting, Seattle, WA, 2010.