Aluminum Crowns

Multiplication of Crowns

It is known that the only finite topological spaces that are Hspaces are the discrete spaces. For a finite poset which is weakly equivalent to an H-space, a generalized multiplication may be found after suitable subdivision. In this paper we construct minimal models of the k-fold generalised multiplications of circles in the category of relational structures, including poset models. In particul...

Primary tooth metal crowns.

The preformed metal crown was first introduced in 1950, made of stainless steel it was referred to by an acronym of SSC. However soon the metal used was changed to nickel-chromium and these days it is best referred to as a preformed metal crown (PMC). I first encountered them in 1965 as a travelling extern in paedodontics in the backwoods of British Columbia (Canada). Not having been taught the...

Fracture resistance of implant- supported monolithic crowns cemented to zirconia hybrid-abutments: zirconia-based crowns vs. lithium disilicate crowns

PURPOSE The aim of this in vitro study was to investigate the fracture resistance under chewing simulation of implant-supported posterior restorations (crowns cemented to hybrid-abutments) made of different all-ceramic materials. MATERIALS AND METHODS Monolithic zirconia (MZr) and monolithic lithium disilicate (MLD) crowns for mandibular first molar were fabricated using computer-aided design...

Sun Decompositions of Crowns

In this paper we give some sufficient conditions for the decomposition of crowns into isomorphic suns. Mathematics Subject Classification: 05C51

Lava Crowns and Bridges