A comparative study of fracture resistance of molars restored with different materials after conventional endodontic treatment
YANG Zong-fan
ZENG Chang-yu
ZHUO Yue
GUO Zhi-yuan
ZHANG Bo
Abstract：AIM:To compare the fracture resistance of molars restored with 4 different materials after con-ventional endodontic treatment. METHODS:80 extracted molars were instrumented and then randomly divided into 4 groups(n=20). The teeth were then restored with silver amalgam(group A), light-cured composite resin(group B), glass ionomer silver reinforced restoration(group C) and glass ionomer(group D) respectively. All specimens were subjected to a vertical load to cause vertical crown and root fracture. The force required to fracture was measured. RE-SULTS:The mean fracture load values( N) of group A, B, C and D were 1126. 15 ± 291. 66, 1682. 90 ± 368. 69, 1614. 55 ± 424. 09 and 1818. 75 ± 439. 54 respectively (P<0. 05). Group A exhibited lower mean fracture load value than group B, C and D (P<0. 05), but there was no significant difference among group B, C and D (P>0. 05). CONCLUSION:The molars restored with light-cured composite resin, glass ionomer silver reinforced restoration or glass ionomer have higher fracture resistance than those restored with silver amalgam.
Keywords：fracture resistancedental restorative materialtooth fractureendodontic treatmentmolar
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 443-445 )