A new magneto-dynamic compression technique for magnetorheological elastomers at high frequencies

2018 ◽  
Vol 66 ◽  
pp. 114-121 ◽  
Author(s):  
I. Agirre-Olabide ◽  
M.J. Elejabarrieta
Keyword(s):  
Dynamic Compression ◽  
Compression Technique ◽  
Magnetorheological Elastomers ◽  
High Frequencies

scholarly journals Esthetic Challenges in Rehabilitating the Anterior Maxilla: A Case Report

2016 ◽  
Vol 41 (1) ◽  
pp. 2-7 ◽  
Author(s):  
ME Miranda ◽  
KA Olivieri ◽  
FJF Rigolin ◽  
AA de Vasconcellos
Keyword(s):  
Clinical Case ◽  
Dynamic Compression ◽  
Prosthetic Rehabilitation ◽  
Compression Technique ◽  
Anterior Maxilla ◽  
Metal Free ◽  
Clinical Challenge ◽  
Ceramic Crowns ◽  
Maxilla And Mandible ◽  
Shape And Size

SUMMARY The rehabilitation of an unesthetic smile in the anterior maxilla is always a clinical challenge, especially when an improper shape and size, old restorations, and unesthetic shading are present. In addition, an irregular gingival zenith contour in the anterior maxilla can affect the smile's harmony. Thus, detailed treatment planning is needed to define a functional and esthetic prosthetic rehabilitation. This study describes a clinical case in which a 55-year-old woman was rehabilitated using Digital Smile Design planning and full ceramic crowns (metal free) in the anterior zone of the maxilla and mandible. To normalize the gingival zenith, a dynamic compression technique was performed using provisional restorations to condition the gingival tissues and harmonize the proportional length of the anterior upper teeth.

scholarly journals Ultrafast Dynamic Compression Technique to Study the Kinetics of Phase Transformations in Bismuth

2008 ◽  
Vol 101 (6) ◽  
Author(s):  
R. F. Smith ◽  
J. H. Eggert ◽  
M. D. Saculla ◽  
A. F. Jankowski ◽  
M. Bastea ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Dynamic Compression ◽  
Compression Technique ◽  
Ultrafast Dynamic ◽  
Kinetics Of

MAGNETOSTRICTIVE PHENOMENA IN MAGNETORHEOLOGICAL ELASTOMERS

2002 ◽  
Vol 16 (17n18) ◽  
pp. 2412-2418 ◽  
Author(s):  
J. M. GINDER ◽  
S. M. CLARK ◽  
W. F. SCHLOTTER ◽  
M. E. NICHOLS
Keyword(s):  
Dynamic Shear ◽  
Iron Particles ◽  
Resonant Structure ◽  
Complex Dynamic ◽  
Low Frequencies ◽  
Magnetorheological Elastomers ◽  
Shear Moduli ◽  
High Frequencies ◽  
Large Elongation ◽  
Magnetostrictive Composites

A host of fascinating and useful magnetic phenomena are found in composites containing magnetizable particles in viscoelastic solids. Embedding magnetically soft iron particles in natural rubber produces a class of magnetostrictive composites sometimes termed magnetorheological (MR) elastomers. We have previously shown that these materials can exhibit viscoelastic moduli that increase substantially in an applied magnetic field. In this paper, we incorporate MR elastomers in a simple resonant structure called a tuned absorber to measure the complex dynamic shear moduli of these materials at high frequencies. We find that the fluid-induced modulus increase in MR elastomers is substantial even at kilohertz mechanical frequencies. As in previous measurements at low frequencies, the moduli are generally found to decrease with strain amplitude. We also report preliminary measurements of the relatively large elongation of these materials in applied magnetic fields.

scholarly journals Contouring the Emergence Profile of Peri-implant Soft Tissue by Provisionals on Implants – Case Report

2015 ◽  
Vol 62 (4) ◽  
pp. 196-201
Author(s):  
Vojkan Lazić ◽  
Ana Todorović ◽  
Igor Djordjević ◽  
Nataša Milošević ◽  
Danica Popović ◽  
...  
Keyword(s):  
Case Report ◽  
Soft Tissue ◽  
Oral Surgery ◽  
Dynamic Compression ◽  
Compression Technique ◽  
Maxillary Central Incisor ◽  
Aesthetic Result ◽  
Implant Placement ◽  
Bone Level ◽  
Provisional Restoration

Summary Aesthetic outcome of implant therapy involves the appropriate architecture of peri-implant soft tissue and interdental papilla. The dynamic compression technique of soft tissue is mentioned in contemporary literature as one of the methods for achieving optimal emergence profile. The aim of this case report was to present soft tissue prosthetic modeling with temporary crowns on implants for obtaining an emergence profile of final restoration. A 25-year-old female patient with missing left maxillary central incisor was referred to the Department of Oral Surgery School of Dental Medicine University in Belgrade for dental implant placement. After detailed planning, implant placement of Straumann Bone level implant NC Ø 3, 3×12 mm (Straumann® Bone Level NC), in the position of 21 was performed. Upon completion of osseointegration period, screw retained laboratory temporary crown was fabricated. During the next 3 months emergence profile was scalloped by creating additional pressure on the soft tissue with periodic adding the composite resin material to a temporary crown. The created emergence profile was transferred to the master cast by using customized impression coping, making possible fabrication of the final implant restoration according to the design made with provisional restoration. Soft tissue conditioning using temporary dental restorations on implants presents a non-invasive method with predictable aesthetic result.

Quasi-Periodic Oscillations in Dwarf Novae

1979 ◽  
Vol 46 ◽  
pp. 77-88
Author(s):  
Edward L. Robinson
Keyword(s):  
Binary Systems ◽  
Outer Edge ◽  
Light Curves ◽  
Close Binary ◽  
Bright Spot ◽  
Dwarf Novae ◽  
Periodic Oscillations ◽  
High Frequencies ◽  
Short Period ◽  
Typical Time

Three distinct kinds of rapid variations have been detected in the light curves of dwarf novae: rapid flickering, short period coherent oscillations, and quasi-periodic oscillations. The rapid flickering is seen in the light curves of most, if not all, dwarf novae, and is especially apparent during minimum light between eruptions. The flickering has a typical time scale of a few minutes or less and a typical amplitude of about .1 mag. The flickering is completely random and unpredictable; the power spectrum of flickering shows only a slow decrease from low to high frequencies. The observations of U Gem by Warner and Nather (1971) showed conclusively that most of the flickering is produced by variations in the luminosity of the bright spot near the outer edge of the accretion disk around the white dwarf in these close binary systems.

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