We consider theories characterized by a set of Ward operators which do not form a closed algebra. We impose the Slavnov–Taylor identity built out of the Ward operators and we derive the acceptable breaking of the algebra and the general form of the classical action. The 1PI generating functional is expressed in terms of the known quantities characterizing the theory and of a nontrivial integrab...

Removal of broken locking bolts requires careful planning. The following tips facilitate the procedure and reduce operation time. Positioning the patient supine without traction allows optimal adduction. Early screw removal will leave the nail rotationally unstable; apply the jig beforehand. If direct palpation is not possible, access the end cap by a guided drill (Fig 1). Use screw holders (Fi...

INTRODUCTION The purpose of this study was to compare the torsion and bending properties of OneShape (OS; Micro Mega, Besançon, France) and WaveOne (WO; Dentsply Maillefer, Ballaigues, Switzerland) single-file systems. METHODS The torsional strength of OS size #25, 0.06 taper and WO primary size #25, 0.08 taper was measured by using a torsiometer after fixing the apical 5 mm of the instrument...