Real-time synchronous measurement of curing characteristics and polymerization stress in bone cements with a cantilever-beam based instrument
| Autor: | S. Palagummi, Forrest A. Landis, Martin Y.M. Chiang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Microprobe
Time Factors Cantilever Materials science 0206 medical engineering 02 engineering and technology Systematic variation Polymerization ARTICLES 03 medical and health sciences 0302 clinical medicine Thermocouple Materials Testing Humans Composite material Instrumentation Curing (chemistry) chemistry.chemical_classification Spectrometer Bone Cements 030206 dentistry Polymer 020601 biomedical engineering chemistry Stress Mechanical |
| Zdroj: | Review of Scientific Instruments. 89:035102 |
| ISSN: | 1089-7623 0034-6748 |
| Popis: | An instrumentation capable of simultaneously determining degree of conversion (DC), polymerization stress (PS), and polymerization exotherm (PE) in real time was introduced to self-curing bone cements. This comprises the combination of an in situ high-speed near-infrared spectrometer, a cantilever-beam instrument with compliance-variable feature, and a microprobe thermocouple. Two polymethylmethacrylate-based commercial bone cements, containing essentially the same raw materials but differ in their viscosity for orthopedic applications, were used to demonstrate the applicability of the instrumentation. The results show that for both the cements studied the final DC was marginally different, the final PS was different at the low compliance, the peak of the PE was similar, and their polymerization rates were significantly different. Systematic variation of instrumental compliance for testing reveals differences in the characteristics of PS profiles of both the cements. This emphasizes the importance of instrumental compliance in obtaining an accurate understanding of PS evaluation. Finally, the key advantage for the simultaneous measurements is that these polymerization properties can be correlated directly, thus providing higher measurement confidence and enables a more in-depth understanding of the network formation process. |
| Databáze: | OpenAIRE |
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