Comparison of push-out bond strength of endodontic sealers after root canal drying with different techniques.

Objectives: An ideal endodontic sealer should bond to both dentin and root-filling material. This study aimed to assess the push-out bond strength (PBS) of mineral trioxide aggregate (MTA)-Fillapex, Endoseal MTA, AH26, and Sure-Seal Root to root dentin after root canal drying with different techniques.

Materials And Methods: This in vitro study was conducted on 160 extracted mandibular premolars.

Evaluation of scalp hair nickel and chromium level changes in patients with fixed orthodontic appliance: a one-year follow-up study.

Background And Objectives: The release of metal ions from orthodontic appliances is part of the dissolution and biomechanical processes of alloys. Nickel (Ni) and chromium (Cr) are the elements commonly used in the manufacture of various components of fixed orthodontic appliances, including bands, brackets and wires. This study was aimed to measure the Ni and Cr ions levels in the scalp hair of patients treated with fixed orthodontic appliances in comparison of the control group.