Study Design: Technical note. Objective: Computer-aided design and computer-aided manufacturing (CADCAM) is commonly used in craniomaxillofacial (CMF) surgery because of its advantage customizing medical devices. We this technology to create individualized, resin-bonded 3-dimensionally printed titanium arch bars. Method: This article describes a patient specific, three-dimensionally (3D) printe...

The paper presents the problem of optimal shaping H-bar cross-section a steel arch that ensures minimal mass. Nineteen combinations nine basic load states are considered simultaneously in formulation. task is formulated as control theory within formal structure maximum Pontriagin’s principle. Since ranges constraint activity defining priori unknown and must be determined numerically, assuming p...

In this paper, optimal design of arch dams is performed under frequency limitations. Colliding Bodies Optimization (CBO), a recently developed meta-heuristic optimization method, which has been successfully applied to several structural problems, is revised and utilized for finding the best feasible shape of arch dams. The formulation of CBO is derived from one-dimensional collisions between bo...

  In this study two groups of dental study models were selected to evaluate the relationship between the tooth size, arch dimensions , and dental crowding. The first group consisting of 56 pairs of dental study models (28 males and 28 females) with normal occlusion ( without dental crowding) ranging in  age from 16 to 20 years, were selected among 4445 students from Kerman by multi stage rando...