Effects of fluoride release from orthodontic bonding materials on nanomechanical properties of the enamel around orthodontic brackets.

Background: The aim of the present study is to evaluate the effects of a fluoride-releasing composite resin bonding material on reducing enamel demineralization underneath and around orthodontic brackets and compare that with a conventional adhesive system.

Materials And Methods: Buccal surfaces of 10 intact extracted premolar teeth were divided into two parts with nail varnish and stainless steel brackets were randomly bonded by two resin composite systems: (Transbond XT) and (Transbond XT plus Color Change) (3M, Unitek, Monrovia, CA, USA) on two sides of the teeth and then samples were placed in a demineralization solution. It is claimed that the second system has the ability of fluoride release.

Effect of bracket bonding with Er: YAG laser on nanomechanical properties of enamel.

Background: The aim of this study was to compare the effects of conventional acid etching and laser etching on the nano-mechanical properties of the dental enamel using nano-indentation test.

Materials And Methods: In this experimental in vitro study, buccal surfaces of 10 premolars were divided into three regions. One of the regions was etched with 37% phosphoric acid and another etched with Er:YAG laser, the third region was not etched.

Closure of large oroantral communication using coronoid process pedicled on temporalis muscle flap: a new alternative approach.

Proximity of maxillary molar teeth roots to the maxillary sinus floor can potentiate oroantral communication (OAC) after extraction. Considering the defect size and situation, surgical treatment may become essential. Surgical treatment modalities are variable and would be indicated in special clinical circumstances.