Collective States in Molecular Monolayers on 2D Materials.

Collective excited states form in organic two-dimensional layers through Coulomb coupling of the molecular transition dipole moments. They manifest as characteristic strong and narrow peaks in the excitation and emission spectra that are shifted to lower energies compared with the monomer transition. We study experimentally and theoretically how robust the collective states are against homogeneous and inhomogeneous broadening, as well as spatial disorder that occurs in real molecular monolayers.

Dental health and odontogenic infections among 6- to 16-year-old German students with special health care needs (SHCN).

Objectives: This cross-sectional study aimed to assess dental health and odontogenic infections in students with special health care needs (SHCN) in the Free State of Thuringia, Germany.

Methods: From 1283 students with SHCN aged 6-16 years, 66.0 % (n = 848 of whom are 35.

[Influence of Fissure Sealants on Dental Health of Elementary School Children in Weimar - A Longitudinal Observational Study under Real-life Conditions].

The aim of the present observational study was to assess the effect of the number and timing of placing fissure sealants (FS) on caries prevalence in elementary school children under real-life conditions. Oral health data from 7- to 10-year-old elementary school children (n=505) attending 4 consecutive annual checkups between 2004 and 2009 was extracted from the public health service database. The number of intact FS and the number of teeth affected by caries was scored according to WHO standard (1997).

Comparison of visual inspection and different radiographic methods for dentin caries detection on occlusal surfaces.

Objectives: The aim of the present study was to assess the validity of the digital phosphor plate radiographic technique (Gendex Dental Systems) on occlusal surfaces in comparison with visual examination and conventional E- and F-speed films.

Methods: The study material consisted of 54 non-cavitated third molars with a range of appearances, including apparently sound surfaces. Each surface was visually examined (VI) according to the criteria established by Ekstrand et al.

In vivo detection of non-cavitated caries lesions on occlusal surfaces by visual inspection and quantitative light-induced fluorescence.

Objective: The aim of this clinical caries detection study was to compare the outcome of quantitative light-induced fluorescence (QLF) and meticulous visual inspection (VI) in detecting non-cavitated caries lesions on occlusal surfaces in young adolescents. It was hypothesized that the respective diagnostic performances of meticulous VI and QLF are similar.

Material And Methods: The subjects were 34 fifteen-year-old students.