Ou KL |
------>authors3_c= ------>paper_class1=1 ------>Impact_Factor=2.150 ------>paper_class3=2 ------>paper_class2=1 ------>vol=42 ------>confirm_bywho=wpdeng ------>insert_bywho=hhm ------>Jurnal_Rank=15.7 ------>authors4_c= ------>comm_author=1 ------>patent_EDate=None ------>authors5_c= ------>publish_day=1 ------>paper_class2Letter=0 ------>page2=704 ------>medlineContent= ------>unit=F0700 ------>insert_date=20090313 ------>iam=7 ------>update_date=None ------>author=??? ------>change_event=4 ------>ISSN= ------>authors_c= ------>score=500 ------>journal_name=Int Endod J ------>paper_name=Effect of damping properties on fracture resistance of root filled premolar teeth: a dynamic finite element analysis ------>confirm_date=20091118 ------>tch_id=084021 ------>pmid=19549155 ------>page1=694 ------>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=21504 ------>authors2=Chang CC ------>authors3=Chang WJ ------>authors4=Lin CT ------>authors5=Chang KJ ------>authors6=Huang HM ------>authors6_c= ------>authors=Ou KL ------>delete_flag=0 ------>SCI_JNo=None ------>authors2_c= ------>publish_area=0 ------>updateTitle=Effect of damping properties on fracture resistance of root filled premolar teeth: a dynamic finite element analysis. ------>language=2 ------>check_flag=None ------>submit_date=None ------>country=None ------>no= ------>patent_SDate=None ------>update_bywho=None ------>publish_year=2009 ------>submit_flag=None ------>publish_month=1 |