Journal List > J Korean Fract Soc > v.20(3) > 1037596

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

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.

Figures and Tables

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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Table 1

Ohura's recipe of self-setting CPC and the amount of aqueous media

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