background: elastomeric chains are commonly used in orthodontics. force decay in these materials poses clinical problems. the aim of this study was to evaluate the effects of three different mouthwashes on the force decay of orthodontic chains. materials and methods: in this experimental study, elastomeric chains with two different confi gurations were divided into eight groups (two control and...

background: different environmental conditions, such as high temperature or exposure to some chemical agents, may affect the force decay of different methods of space closure during orthodontic treatment. the aim of this in vitro study was to evaluate the force decay pattern in the presence of tea as a popular drink in some parts of the world and two mouthwashes that are usually prescribed by t...

An earlier publication “The implication of the atomic effects in neutrinoless double beta (0???) decay” written by Mei and Wei has motivated us to compare decay Q value (Q??) derived from parent nucleus daughter with two ejected particles final state Q?? directly initial neutral atom double-ionized ion state. We show that results are same, which is mass-energy difference (?Mc2) subtracted total...