A novel polyurethane-based root canal-obturation material and urethane acrylate-based root canal sealer--part I: synthesis and evaluation of mechanical and thermal properties
Hsieh, KH; Liao, KH; Lai, EH; Lee, BS; Lee, CY; Lin, CP
| HERO ID | 4947136 |
|---|---|
| In Press | No |
| Year | 2008 |
| Title | A novel polyurethane-based root canal-obturation material and urethane acrylate-based root canal sealer--part I: synthesis and evaluation of mechanical and thermal properties |
| Authors | Hsieh, KH; Liao, KH; Lai, EH; Lee, BS; Lee, CY; Lin, CP |
| Journal | Journal of Endodontics |
| Volume | 34 |
| Issue | 3 |
| Page Numbers | 303-305 |
| Abstract | Resilon (RealSeal; SybronEndo, Orange, CA) has been developed as an alternative to gutta percha, but its advantages over gutta percha remain controversial. In this study, we developed a novel zinc oxide/thermoplastic polyurethane (ZnO/TPU) composite root canal-filling material and a visible-light curable urethane-acrylate/tripropylene glycol diacrylate (UA/TPGDA) root canal sealer. The mechanical and thermal properties of the ZnO/TPU composite were compared with those of gutta percha and Resilon. Results showed that the tensile strength and elastic modulus of the ZnO/TPU composite were markedly higher than those of gutta percha and Resilon. The melting points of all three materials were similar; however, the enthalpy change and specific heat of ZnO/TPU (9.4 J/g, 0.7 J/g degrees C) were close to those of gutta percha (10.9 J/g, 0.7 J/g degrees C) but lower than those of Resilon (28.9 J/g, 1.3 J/g degrees C). The results indicate that ZnO/TPU composite exhibits better mechanical strength than Resilon, and its combination with UA/TPGDA sealer has excellent potential to be used as a root canal-filling material. |
| Doi | 10.1016/j.joen.2007.12.006 |
| Pmid | 18291281 |
| Wosid | WOS:000253790200012 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |