Experiment study on fracture resistance of endodontically treated residual root by polylatic acid absorbable intracanal post
CHEN Ai-hua
HUANG Hua
Abstract：AIM:To investigate the fracture resistance of endodontically treated residual root by polylatic acid absorbable intracanal post restoration.METHODS:24 extracted human mandibular premolars were treated by root canal therapy and canal obturation,then divided into 3 groups randomly(n=8).The teeth in group A,B and C were restored with polylatic acid absorbable intracanal posts covered with PLA film,glass fiber posts and short compos-ite resin post respectively,and with composite resin crowns.Each specimen was subjected to a load on INSTRON 5567 material testing machine until failure.Then fracture resistance was compared statistically by one-way ANOVA and fol-lowed by LSD test for multiple comparisons.Fracture modes were visually examined.RESULTS:The of fracture re-sistance(N)of group A,B and C was 1022.44 ±359.70,1168.33 ±193.50 and (1767.36 ±677.20)respectively (P<0.05).Group A vs B (P>0.05),group C vs group A or B (P<0.05).The fracture modes of all the teeth were favorable.CONCLUSION:Fracture resistance of residual roots endodontically treated by polylatic acid intraca-nal posts and PLA film is lower than that by short composite resin post,but might meet the needs of clinical practice.
Keywords：polylatic acidabsorbable intracanal postfracture resistanceresidual teeth
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 592-595 )