title: Influence of apical enlargement on bacterial infection during treatment of apical periodontitis.
abstract: This study sought to evaluate the influence of apical enlargement and 1-wk calcium hydroxide dressing on bacterial infection of root canals. Sixty single-rooted teeth were used. Half of these teeth were prepared to a size 25 file and the other half to a size 40 file. Then the root canals were dressed with calcium hydroxide for 1 wk. Bacterial sampling showed significant reduction of bacterial growth during the treatment. No statistically significant difference was noted between the size 25 and 40 file groups after instrumentation, and after 1-wk calcium hydroxide dressing.
authors.affiliation: Department of Research, School of Dental Surgery, Lebanese University, Beirut, Lebanon.
authors.forename: G M
authors.initials: GM
authors.lastname: Yared
authors.forename: F E
authors.initials: FE
authors.lastname: Dagher
mesh_terms: D000328:Adult; D001419:Bacteria / Q000254:growth & development; D001424:Bacterial Infections / Q000209:etiology; D002126:Calcium Hydroxide / Q000627:therapeutic use; D015169:Colony Count, Microbial; D003786:Dental Pulp Cavity / Q000382:microbiology; D005069:Evaluation Studies as Topic; D006801:Humans; D010485:Periapical Periodontitis / Q000382:microbiology* / Q000628:therapy; D012086:Reoperation; D012390:Root Canal Therapy / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods
chemical_list: D002126:Calcium Hydroxide