16 research outputs found
Measurement of the electron reconstruction efficiency at LHCb
The single electron track-reconstruction efficiency is calibrated using a sample corresponding to 1.3 fb−1 of pp collision data recorded with the LHCb detector in 2017. This measurement exploits B+→ J/ψ(e+e−)K+ decays, where one of the electrons is fully reconstructed and paired with the kaon, while the other electron is reconstructed using only the information of the vertex detector. Despite this partial reconstruction, kinematic and geometric constraints allow the B meson mass to be reconstructed and the signal to be well separated from backgrounds. This in turn allows the electron reconstruction efficiency to be measured by matching the partial track segment found in the vertex detector to tracks found by LHCb's regular reconstruction algorithms. The agreement between data and simulation is evaluated, and corrections are derived for simulated electrons in bins of kinematics. These correction factors allow LHCb to measure branching fractions involving single electrons with a systematic uncertainty below 1%
Apical extrusion of intracanal bacteria following use of two engine-driven instrumentation techniques
Less extrusion debris during the retreatment of curved canals using twisted files with higher rotational speeds: an ex vivo study
Apical Extrusion of Intracanal Bacteria following use of Two Engine-driven Instrumentation Techniques: An in vitro Study
Preferences of dentists and endodontists, in Saudi Arabia, on management of necrotic pulp with acute apical abscess
Minimally invasive endodontics: challenging prevailing paradigms.
The primary goal of endodontic therapy is the long-term retention of a functional tooth by preventing or treating apical periodontitis. However, there are many other factors that impact endodontic outcomes such as the quality of the restoration and structural integrity of the tooth after root canal preparation. Contemporary research efforts are currently directed to better understanding dentin behaviour and structure during aging and function. An alternative approach is to minimise structural changes during root canal therapy, which may result in a new strategy that can be labelled \u27minimally invasive endodontics\u27. This review addresses current clinical and laboratory data to provide an overview of this new endodontic paradigm