Effect of low-level laser therapy on postoperative pain after single-visit root canal retreatment of mandibular molars: A randomized controlled clinical trial.

Aim: To compare the effect of low-level laser therapy (LLLT) on postoperative pain after single-visit root canal retreatment on mandibular molars.

Methodology: This randomized controlled clinical trial included 36 patients referred to the Department of Endodontics, Islamic Azad University, Tehran, Iran. Healthy patients who required root canal retreatment on symptomatic first or second mandibular molars, with a PAI index score of 2 or 3, preoperative tooth and percussion pain of <56 mm on a 170-mm visual analogue scale (VAS) were included.

Reduction of Enterococcus faecalis in curved root canals after various sizes and tapers of canal preparation.

Aims: The aim of this study was to evaluate the reduction of Enterococcus faecalis in curved root canals after various sizes and tapers of the canal preparation.

Materials And Methods: Mandibular first molars (n = 103) with curved mesiobuccal canals were divided into one control (n = 5) and 7 experimental (n = 14) groups, were inoculated with E. faecalis (ATTC 29212) and prepared with the following RaCe files (FKG Dentaire) as master apical file: Groups: 25.

Prevalence of oral mucosal lesions and related factors in 200 HIV+/AIDS Iranian patients.

Background: Human immunodeficiency virus infection is a worldwide problem, which affects both developed and developing countries the same. Oral lesions related to this disease are important because they affect the patient's quality of life. In developed countries, these lesions are well classified, but fewer reports on this subject are available in developing countries.