Abstract Objectives To investigate the effect of scanned area on accuracy and scan time intraoral scans an anterior implant. Materials methods Three operators experienced in scanning (at least 2-year experience) performed partial complete-arch (n = 10) a dentate resin model with implant at left central incisor site by using scanner (Trios3; 3Shape, Copenhagen, Denmark). Each partial- or was sup...

OBJECTIVE To investigate the maxillary and mandibular anterior crown width/height ratio and its relation to various arch perimeters, arch length, and arch width (intercanine, interpremolar, and intermolar) groups. MATERIALS AND METHODS The calculated sample size was 128 subjects. The crown width/height, arch length, arch perimeter, and arch width of the maxilla and mandible were obtained via ...

objective: implants are being used in orthodontics as a reliable mode of anchorage. among other factors, the cortical bone thickness plays a major role in determining the stability of these implants. the objective of this study was to study the relationship of various arch forms and the cortical bone thickness and to determine if the cortical bone thickness varies between various arch forms. th...

The term "bovine arch" is widely used to describe a common anatomic variant of the human aortic arch branching. This so-called bovine aortic arch has no resemblance to the bovine aortic arch. We describe the most common human aortic arch branching patterns and compare these with the bovine aortic arch.

An efficient methodology is proposed to find optimal shape of arch dams on the basis of constrained natural frequencies. The optimization is carried out by virtual sub population (VSP) evolutionary algorithm employing real values of design variables. In order to reduce the computational cost of the optimization process, the arch dam natural frequencies are predicted by properly trained back pro...

This paper presents an efficient optimization procedure to find the optimal shapes of double curvature  arch  dams  considering  fluid–structure  interaction  subject  to  earthquake  loading. The optimization is carried out using a combination of the magnetic charged system search, big bang-big crunch algorithm and artificial neural network methods. Performing the finite element  analysis  dur...

Professors: G . I . Anderson, M .Arch . Illinois ; G. Conley, B .Arch. Harvard ; J . W. Fortey, P .E . Doctorate d'Universite de Toulouse (France) ; F. Grieger, M .Arch. Pennsylvania ; R. M. Kelso, M .S . Tennessee; J . A . Kersavage, D .Sc . S . California ; W. J. Lauer, M .S . Arch . Engr . Iowa State ; A . J. Lester, M .Arch. Virginia ; P . Lizon, Ph .D . Pennsylvania ; D. K. Ruth, M .Arch ....

This study aims at determining the critical seismic intensity at which cracks are expected to develop in a concrete arch dam. This intensity is referred to as crack initiation intensity. The crack initiation intensity measure implies that earthquakes with the intensity measure higher than this value are expected to induce cracks in the arch dam. This quantity is an indicator for seismic evaluat...

An analysis was made of 78 pathologic specimens in which a right aortic arch was present. In four, the right arch was part of a double aortic arch. In 74 cases the right aortic arch was the only arch. The cases of right aortic arch could be subdivided into two groups as follows: (1) that with a retroesophageal aortic segment (three cases) and (2) that without a retroesophageal segment (71 cases...