• Methods: Case series data were analyzed from 66 failing periodontal maintenance patients who had exhausted treatment options before using prescription trays with a 1.7% hydrogen peroxide gel once or twice daily for two-and-a-half to five years. Data included pocket probing depths (PPD), bleeding on probing (BOP), smoking status, and compliance with tray usage. Data were collected prior to tra...

In this study, the author attempted to explicate the infuluence of thedifference in the impression methods for the simulation models based on the hypothetical pressure-displaceability and the form of the alveolar ridge on the reproducibility of the measuring models. For this purpose, the reproducibility of the master cast were examined by use of the threedimensional position-reproducing apparat...

Malalignment of the tibial tray in total knee arthroplasty has been linked to several complications including tibial tray subsidence, leading to revision surgery. However, quantitative biomechanical evidence to directly support the mechanism of failure is not available. We developed a model to study tibial tray micromotion and subsidence in vitro under multiaxial physiological loading condition...

The keel design of the tibial tray is essential for the transmission of the majority of the forces to the peripheral bone structures, which have better mechanical proprieties, thus reducing the risk of loosening. The aim of the present study was to compare the behaviour of different tibial tray designs submitted to torsional forces. Four different tibial components were modelled. The 3-D recons...

This paper explores the interaction between implicit and explicit processes during skill learning, in terms of top-down learning (that is, learning that goes from explicit to implicit knowledge) versus bottom-up learning (that is, learning that goes from implicit to explicit knowledge). Instead of studying each type of knowledge (implicit or explicit) in isolation, we stress the interaction bet...

The article "The Flying Elephant: Evidence for Involvement of a Third Jet in the WTC Attacks" was published in the Journal of 9/11 Studies ( http://JournalOf911Studies.com ). [1] The premise of the article is that two videos and a photograph show a jetliner "orbiting in close proximity to the towers for several minutes while the North Tower burned and the South Tower was struck." After assertin...

In this paper, a new type of total spray tray (TST) with gas–liquid countercurrent contact is proposed to solve the problem slight operation flexibility and poor sloshing resistance in towers under offshore conditions. Its hydrodynamic performance indicators, such as pressure drop, weeping, entrainment, liquid level unevenness, were experimentally studied rolling motion. A tower an inner diamet...