The degree of success in the elimination of bacteria during cavity preparation and prior to the insertion of a restoration may increase the longevity of the restoration and therefore the success of the restorative procedure. The complete eradication of bacteria in a caries-affected tooth, during cavity preparation, is considered a difficult clinical task. In addition to weakening the tooth stru...

1 PhD, Assistant Professor, Department of Pediatric Dentistry, Faculty of Dental Medicine, Medical UniversitySofia, Bulgaria 2 PhD, Professor, Department of Pediatric Dentistry, Faculty of Dental Medicine, Medical UniversitySofia, Bulgaria *Corresponding author’s E-mail: [email protected] Tel: +359 888 363 312 Er:YAG laser is one of the most suitable laser systems used in pediatric dentistry. The...

OBJECTIVE A randomised controlled trial to determine the acceptability to dentists and patients of cavity preparation with an Erbium:YAG laser as compared with conventional handpieces. METHODS Fifteen dentists (9 GDPs, 1 community dentist and 5 hospital dentists) treated 77 patients (age range 3.5-68 years old) who had two matched cavities, in a split mouth, randomised trial. One cavity was p...

In this study, two different cavity designs were compared from a mechanical point of view: (a) an axisymmetric model of a conventional class 1 cavity preparation and restoration; and (b) an axisymmetric model of a modified cavity design. The modified design was characterized by a cavo-surface angle (c.s.a.) of approximately 90 degrees and a stepped cavity wall. Using a mathematical model, stres...

The proposed linear electron-positron collider TESLA is based on 1.3 GHz superconducting niobium cavities for particle acceleration. For a center-of-mass energy of 500 GeV an accelerating field of 23.4 MV/m is required which is reliably achieved with a niobium surface preparation by chemical etching. An upgrade of the collider to 800 GeV requires an improved cavity preparation technique. In thi...

in present research study, 44 canine teeth of with completely formed apex was selected in 11 cats. jaw bones were removed while teeth were kept intra alveolar sockets and routine root canal therapy was performed on each root. afterwards, 3mm of each root were cut apically. 20 teeth underwent cavity preparation via high speed dental turbine and round diamond bur, 20 via endosonic device and 4 (1...

We describe how a quantum system composed of a cavity eld interacting with a movable mirror can be utilized to generate a large variety of nonclassical states of both the cavity eld and the mirror. First we consider state preparation of the cavity eld. The system dynamics will prepare a single mode of the cavity eld in a multicomponent Schrodinger cat state, in a similar manner to that in a Ke...

AIM The purpose of this study was to assess in vitro the tooth color alterations associated with two commonly used endodontic irrigants, the chlorhexidine gluconate (CHX) and the sodium hypochlorite (NaOCl) up to 15 days post-treatment. Additionally, the possible influence of endodontic access preparation on tooth color was investigated. MATERIALS AND METHODS Thirty intact human anterior teet...