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Chinese Journal of Interventional Radiology(Electronic Edition) ›› 2024, Vol. 12 ›› Issue (03): 228-233. doi: 10.3877/cma.j.issn.2095-5782.2024.03.007

• Basic Science Research • Previous Articles    

Experimental study on the materials properties of bone cement treated by different cooling methods to prolong it's injection time in the vertebroplasty

Shuai Zhang1, Kai Liu1, Ganggang Wang1, Caifang Ni1, Long Chen1,()   

  1. 1. Department of Interventional Radiology, the First Affiliated Hospital of Soochow University, Jiangsu Suzhou 215006, China
  • Received:2024-04-30 Online:2024-08-25 Published:2024-09-09
  • Contact: Long Chen

Abstract:

Objective

To explore the changes of polymerization time, polymerization temperature and mechanical properties of bone cement treated with different cooling treatments.

Methods

Methyl acrylate bone cement was divided into three groups according to different cooling methods. Group A was the control group. Group B was a 4℃ pre-cooling group, in which the bone cement was placed in a 4℃ temperature for 24 hours before powder and liquid mixing. Group C was the 0℃ rapid cooling group, and the powder and liquid of the bone cement were mixed and then placed in the 0℃ for rapid cooling. Each group was further divided into two subgroups. The first subgroup waited for the cement to enter the viscous phase and then placed it at 22℃ to continue the experiment (group A1, B1, and C1), and the second subgroup waited for the cement to enter the viscous phase and then placed it at 37℃ to continue the experiment (group A2, B2, and C2). The three indexes of bone cement, which include the polymerization time (the maintenance time of rarefaction phase, viscous phase, and hardening phase), the polymerization temperature, and the mechanical properties (strength and stiffness), were measured. The material properties among subgroups A1, B1, and C1; and among subgroups A2, B2, and C2 were compared by one-way ANOVA. The paired t test was used to compare the differences of material properties between the two subgroups (A1-A2, B1-B2, C1-C2) of the same group, and P < 0.05 was considered statistically significant.

Results

The duration of the viscous phase (1 880.0 ± 59.9 seconds) of group C1 was significantly longer than that of group A1 and B1 (P < 0.05). The duration of viscous phase (193.8 ± 14.7 seconds) of the group C2 was significantly shorter than that of group C1, furthermore, there was no significant difference among groups C2, A2 and B2. The maximum polymerization temperature of the bone cement in group C1 (11.6 ± 0.7)℃ was significantly lower than that in group A1 and B1 (P < 0.05), however, the maximum polymerization temperature of the group C2 (95.7 ± 2.2)℃ was significantly higher than that of group C1, furthermore, there was no significant difference among groups C2, A2 and B2. The strength of the bone cement in group C1 (81.3 ± 3.6) Mpa was significantly lower than that in group A1 and B1 (P < 0.05), however, the strength of the bone cement in group C2 (90.9 ± 3.5) Mpa, was significantly higher than that in group C1, furthermore, there was no significant difference among groups C2, A2 and B2. There was no significant difference in cement stiffness among groups A1, B1, and C1, and among groups A2, B2, and C2.

Conclusion

Rapid cooling at 0℃ to prolong the working time of bone cement injection is a safe, feasible and effective method.

Key words: Bone cement, Hypothermia, Polymerization time, Mechanical properties, Percutaneous vertebroplasty

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