J Korean Fract Soc.  2007 Jul;20(3):266-271. 10.12671/jkfs.2007.20.3.266.

Compatibility of Self-setting DBM-CP Composites in Percutaneous Kyphoplasty

• Lee JH

• KMID: 2296828
• DOI: http://doi.org/10.12671/jkfs.2007.20.3.266

Abstract

PURPOSE
To analyze the physical properties of demineralized bone matrix (DBM) and self-setting calcium phosphate cement (CPC) composite for its compatibility to percutaneous kyphoplasty.
MATERIALS AND METHODS
According to tap volume method, DBM was mixed with CPC in variable ratio 0%, 20%, 30%, 40% and 50%. Distilled water was used as a hardening fluid. Its properties, including injectability, mold applicability, setting time and its behavior, maximum temperature, and mechanical strength, were analyzed.
RESULTS
The DBM-CP composites has a good injectability and mold applicability, a maximum temperature of less than 5oC, a initial setting time of 3 to 10 minutes. The outer surface of DBM-CP composites showed their even distribution in optical microscopy. Injectability, mold applicability and compressive strength were in inverse proportion to the amounts of DBM.
CONCLUSION
This study suggests that the DBM-CP composites has a good injectability and mold applicability with a low setting temperature and even distribution of compound. Therefore this composite might be used as a substitute of PMMA in kyphoplasty.

Keyword

DBM; CPC; DBM-CP composites; Percutaneous kyphoplasty

MeSH Terms

Bone Matrix
Calcium
Compressive Strength
Fungi
Kyphoplasty*
Methods
Microscopy
Polymethyl Methacrylate
Water
Calcium
Polymethyl Methacrylate
Water

Figure

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  Fig. 1 Schematic diagram of the injectability test (A) and acryl mold for the rheological test (B).

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  Fig. 2 Injectability (I) of the DBM-CP composites.

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  Fig. 3 Rheological behavior of the DBM-CP composites injected into acryl mold. (A) Plain CPC. (B) 20 volume % of DBM. (C) 30 volume % of DBM. (D) 40 volume % of DBM. (E) 50 volume % of DBM.

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  Fig. 4 Setting time of the DBM-CP composites.

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  Fig. 5 Tmperature rise of the DBM-CP composites.

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  Fig. 6 Optical microscopic findings of DBM (A) and DBMCP composites (B). After selfsetting procedure of 50 volume percent DBM-CP composites, the mixture showed even distribution of DBM.

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