Real-time synchronous measurement of curing characteristics and polymerization stress in bone cements with a cantilever-beam based instrument

Sri Vikram Palagummi, Forrest A. Landis, Martin Y.M. Chiang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish (US)
Article number035102
JournalReview of Scientific Instruments
Volume89
Issue number3
DOIs
StatePublished - Mar 1 2018

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Bone cement
cantilever beams
Cantilever beams
cements
curing
bones
Curing
polymerization
Polymerization
Cements
orthopedics
Infrared spectrometers
infrared spectrometers
Orthopedics
thermocouples
Thermocouples
confidence
Raw materials
high speed
Viscosity

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

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abstract = "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.",
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Real-time synchronous measurement of curing characteristics and polymerization stress in bone cements with a cantilever-beam based instrument. / Palagummi, Sri Vikram; Landis, Forrest A.; Chiang, Martin Y.M.

In: Review of Scientific Instruments, Vol. 89, No. 3, 035102, 01.03.2018.

Research output: Contribution to journalArticle

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