AIM To re-examine a population after 20 years and evaluate changes in prevalence of endodontic treatment and apical periodontitis, as well as the technical quality of root fillings. METHODOLOGY One hundred and fifteen out of an original 200 patients living in the northern part of Sweden were re-examined with a full mouth radiographic survey after 20 years. Frequencies of root canal treated te...

We exhibit tight contact structures on 3-manifolds that do not admit any symplectic fillings.

The largest source of mercury located in dental amalgam fillings people. In this study, mercury level in saliva of amalgam and non-amalgam human were compared as well as the level of α amylase has been detected. Materialsand methods: The concentration of mercury, silver, and activity of amylase in saliva were measured in 55 adult study subjects. The mercury contents were determined by cold–vapo...

We discuss a generalisation of symplectic cohomology for symplectic manifolds which weakly fill their contact boundary and satisfy an additional stability condition. Furthermore, we develop a geometric setting for proving maximum principles for Floer trajectories, and prove a Moser-type result for weak fillings. This is a preliminary version of the paper.

We show that the distance between a finite filling slope and a reducible filling slope on the boundary of a hyperbolic knot manifold is at most one. Let M be a knot manifold, i.e. a connected, compact, orientable 3-manifold whose boundary is a torus. A knot manifold is said to be hyperbolic if its interior admits a complete hyperbolic metric of finite volume. Let M(α) denote the manifold obtain...

It is proved that the diffeomorphism type of the minimal symplectic fillings of the link of a simple singularity is unique. In the proof, the uniqueness of the diffeomorphism type of CP 2 \D, where D is a pseudo holomorphic rational curve with one (2, 3)cusp, is discussed.