Evaluation of Mechanical Properties of a Hollow Endodontic Post by Three Point Test and SEM Analysis: A Pilot Study

Materials

Francesco Puleio¹  Massimo Calapaj²  Giuseppe Lo Giudice²  Fabiana Nicita²  Roberto Lo Giudice³  Edoardo Ferrari Cagidiaco⁴ 

[1] Messina University, 98122 Messina, Italy;Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Messina University, 98122 Messina, Italy;Department of Clinical and Experimental Medicine;Department of Prosthodontic and Dental Materials, Siena University, 53100 Siena, Italy;

关键词: endodontic post;    flexural strength;    Young’s modulus;    three-point bending test;   

DOI  :  10.3390/ma12121983

来源: DOAJ

【 摘 要 】

The aim of this study was to investigate the mechanical properties of a fiber hollow endodontic post characterized by the presence of an empty central cylindrical channel extended along the whole length. This particular shape allows clinicians to use the post also as a cementation resin carrier. Ten hollow posts were divided in two groups: the control group (unfilled hollow posts) (Group 0) and hollow posts filled with dual resin cement (Group 1). The samples of both groups were subjected to mechanical and micromorphological analysis by performing a three-point test and SEM observations. In the three-point test, the Group 1 samples exhibited a fracture load of 57.09 ± 5.06 N, a flexural strength of 1323.53 ± 110.09 MPa, and a Young’s modulus of 42.87 ± 0.86 GPa. The samples of Group 2 exhibited a fracture load of 38.17 ± 1.7 N, a flexural strength of 908.87 ± 30.98 MPa, and a Young’s modulus of 40.33 ± 1.9 GPa. The difference between fracture load, flexural strength, and deflection between the two groups was statistically highly significant (p < 0.01). Further, the difference between the Young’s modulus of the two groups was statistically significant (p < 0.05). The values obtained are similar to those of other posts available on the market.

【 授权许可】

Unknown