| Lee, H. -F., Lee, S. -Y., Huang, H. -M., Tsai, C.-Y., Pan, L. -C. |
------>authors3_c=None ------>paper_class1=2 ------>Impact_Factor=None ------>paper_class3=0 ------>paper_class2=0 ------>vol=#2504 ------>confirm_bywho=yangyuan ------>insert_bywho=hhm ------>Jurnal_Rank=None ------>authors4_c=None ------>comm_author= ------>patent_EDate=None ------>authors5_c=None ------>publish_day=None ------>paper_class2Letter=None ------>page2= ------>medlineContent= ------>unit=E0300 ------>insert_date=20000615 ------>iam=3 ------>update_date= ------>author=??? ------>change_event=5 ------>ISSN=None ------>authors_c=None ------>score=175 ------>journal_name=78th General Session of International Association for Dental Research, Washington, DC, USA, ------>paper_name=Dynamic Finite Element Analysis of Tooth Fracture ------>confirm_date=20010330 ------>tch_id=084021 ------>pmid=19549155 ------>page1=pp456 ------>fullAbstract=AIM: To evaluate the ex vivo effects of damping on stress concentration in root filled premolar teeth. METHODOLOGY: Damping ratios of maxillary premolar teeth that had undergone root canal treatment were tested in a laboratory model. In addition, two-dimensional finite element (FE) models were established for dynamic analysis. RESULTS: The mean-damping ratio was significantly lower in premolar teeth that had undergone root canal preparation (8.50 +/- 0.53%) than in unprepared teeth (14.42 +/- 2.17%) (P < 0.05). However, root filling had a significant positive effect on the damping ratio of the tooth (10.84 +/- 1.70%) (P < 0.05). When the damping ratio was taken into consideration, FE analysis revealed that peak stresses in the apical one-third of the root on the buccal side were reduced by 31.8% when mastication forces were applied on the palatal cusp and occlusal fossa. CONCLUSION: Pulp tissue plays an important role in providing protective effects when teeth are subjected to a dynamic load. However, root filled teeth do not provide such protective effects. ------>tmu_sno=None ------>sno=1971 ------>authors2=None ------>authors3=None ------>authors4=None ------>authors5=None ------>authors6=None ------>authors6_c=None ------>authors=Lee, H. -F., Lee, S. -Y., Huang, H. -M., Tsai, C.-Y., Pan, L. -C. ------>delete_flag=0 ------>SCI_JNo=None ------>authors2_c=None ------>publish_area=None ------>updateTitle=Effect of damping properties on fracture resistance of root filled premolar teeth: a dynamic finite element analysis. ------>language=2 ------>check_flag= ------>submit_date= ------>country=None ------>no= ------>patent_SDate=None ------>update_bywho= ------>publish_year=2000 ------>submit_flag= ------>publish_month=None |