Study of the effect of different nanofillers on the thermal and mechanical behavior of a bone cement
Paz Jiménez E 1, Abenojar Buendía J 2, Cledera Castro MM 1, Ballesteros Iglesias Y 1, Forriol F 3, del Real Romero JC 1
1 Instituto de Investigación Tecnológica/Dpto. Ingeniería Mecánica, Universidad Pontificia Comillas, Madrid, España.
2 Dpto. Ciencia e Ingeniería de Materiales e Ingeniería Química, Universidad Carlos III de Madrid, Madrid.
3 Facultad de Medicina, Universidad San Pablo CEU, Madrid, España.
To study the effect of the addition of different nanofillers on the mechanical properties and in the curing process of the bone cement.
A bone cement of similar formulation to commercial cements was prepared in the laboratory. Two nanofillers were used: carbon nanotubes (MWCNT) and a toughness modifier based on block copolymers (Nanostrength®). To evaluate the effect on the cement, weigth loadings ranging from 0,1 to 1 wt% (MWCNT) from 1 to 10 wt% (Nanostrength®) were used. Bending, compressive and fracture test were achieved to determine their mechanical properties. In addition, thermal properties were studied.
The results show a significant decrease in the maximum curing temperature of the cement with the addition of MWCNT, without being affected its mechanical properties. In the case of Nanostrength®, significant improvements were not found in their mechanical properties, mainly tenacity, but a slight increase in temperature and a decrease of curing time of fixation were observed.
The addition of carbon nanotubes to the basic formulation of a bone cement enhances the thermal properties without a reduction of the mechanical properties. Nanostrength® does not seem to improve the thermal and mechanical behavior of the bone cement.
Bone cement, thermal necrosis, fracture toughness, mechanical properties, carbon nanotubes.
JC del Real Romero
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