A study of stress distribution in twin-root canal with dowel-core crown by three dimension finite element method;

6 section cooling wall tube root of blast furnace bosh were analyzed from three aspect cooling water of the blast furnace,body of the cooling wall and operation of the blast furnace,and according measures were decided to reduce and eliminate the breakage.

Evaluation of Root Canal System in Mandibular Third Molars;

Left lower first premolar with 3 root canals:A case report;

An experimental study of apical microleakge of different root canal pastes in ObturaⅡ technique;

Comparative analysis of microbial presence in root canals of teeth suffering from endodontic flare-up and chronic apical periodontitis;

The root canals in mandibular first premolars failed to be treated;

Root canals were classified according Vertucci′s classification.