Introduction: A large number of orthodontists prefer to rebond the failed bonded brackets or use recycled brackets in some instances. The aim of this study was to compare the shear bond strength of rebonding with using recycled brackets on enamel surface. Methods: Bonding of brackets on the surface of extracted first bicuspids was tested in five different groups to compare their shear bond stre...

BACKGROUND Crown-root fractures of anterior teeth are relatively common but often time consuming and difficult to treat. In some cases, the clinician can complete the treatment in a single visit by reattaching the fractured fragment. CASE DESCRIPTION In this case report, the authors describe the treatment of a complicated crown-root fracture of the maxillary right central and lateral incisors...

background. failure of orthodontic bracket bonds is a common occurrence during orthodontic treatment. different tech-niques have been suggested in the literature to remove resin residues from the bracket bases and enamel surfaces to prepare the surfaces again after debonding. this study attempted to compare multiple rebond shear strengths (sbs) of debonded brackets following preparation with sa...

The structure of the Au/Si(557) surface is determined from three-dimensional x-ray diffraction measurements, which directly mandate a single Au atom per unit cell. We use a "heavy atom" method in which the Au atom images the rest of the structure. Au is found to substitute for a row of first-layer Si atoms in the middle of the terrace, which then reconstructs by step rebonding and adatoms. The ...

There is no consensus in the literature concerning the rebonding procedure for orthodontic retainers. The aim of this in vitro study was to evaluate the bond and rebond strength of retainers bonded to enamel surfaces with and without composite remnants. The retainers were bonded with Excite and Tetric Flow on three different surfaces: clean enamel, enamel where the composite had been removed by...

OBJECTIVE To compare the conventional etching and primer method (CEP) and the self-etching primer method (SEP) in rebonding brackets. METHODS Forty human maxillary second premolars extracted for orthodontic purpose were randomly divided into 4 equal groups. Group 1 and Group 2 were bonded using the CEP method; Group 3 and Group 4 using the SEP method. All the brackets were debonded and 40 new...