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Articoli di riviste sul tema "Fixed arches"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 4 febbraio 2022

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1

Pi, Y. L. "Elastic flexural-torsional buckling of fixed arches." Quarterly Journal of Mechanics and Applied Mathematics 57, no. 4 (November 1, 2004): 551–69. http://dx.doi.org/10.1093/qjmam/57.4.551.

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2

Xi, Kuan Tang, Jin Li, Tie Gang Zhou, and Qing Xing Xu. "Out-of-Plane Stability Analysis of U-Section Pin-End Steel Arch." Applied Mechanics and Materials 351-352 (August 2013): 169–73. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.169.

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Abstract (sommario):

Two kinds of finite element model which can reflect the effects of different loading positions were constructed with Beam 188 and Shell 181. Effects of different restraints, load models and rise-span ratios on out-of-plane buckling were studied by comparing results of fixed arches with that of pin-end arches under three loading models. It is conservative to design by employing results of radial loading. As for out-of-plane stability, pin-end arches are better than fixed arches when rise-span ratio is big. Compared with U-section pin-end circular arches with diaphragm, those with batten plates

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3

Xi, Kuan Tang, Jin Li, Tie Gang Zhou, and Tao Lin. "Out-of-Plane Stability Analysis of I-Section Steel Arch." Applied Mechanics and Materials 405-408 (September 2013): 781–85. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.781.

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Finite element model which can reflect the effects of different loading positions were constructed with Beam 188. Effects of different restraints, load models and rise-span ratios on out-of-plane buckling were studied by comparing results of fixed arches with that of pin-end arches under three loading models. It is conservative to design by employing results of radial loading. For ideal restraints, out-of-plane stability of pin-end arches is better than fixed arches when rise-span ratio is big. Effects of different loading positions on out-of-plane buckling were studied. Buckling loads of arch

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4

Liu, Airong, Zhicheng Yang, Hanwen Lu, Jiyang Fu, and Yong-Lin Pi. "Experimental and analytical investigation on the in-plane dynamic instability of arches owing to parametric resonance." Journal of Vibration and Control 24, no. 19 (August 11, 2017): 4419–32. http://dx.doi.org/10.1177/1077546317726210.

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Abstract (sommario):

When an arch is subjected to a periodic load, it may lose in-plane stability dynamically owing to parametric resonance. Previous investigations have been concentrated on in-plane dynamic buckling of pin-ended shallow arches. However, in engineering practice, fixed arches with different rise-to-span ratios are often encountered. Little research on in-plane dynamic instability of deep fixed arches has been reported in the literature. This paper is concerned with experimental and analytical investigations for in-plane dynamic instability of fixed circular arches with rise-to-span ratios 1/8–1/2 u

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5

Sabale, Aditya, and K. V. Nagendra Gopal. "Nonlinear In-Plane Stability of Deep Parabolic Arches Using Geometrically Exact Beam Theory." International Journal of Structural Stability and Dynamics 18, no. 01 (January 2018): 1850006. http://dx.doi.org/10.1142/s0219455418500062.

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In this paper, we investigate the in-plane stability and post-buckling response of deep parabolic arches with high slenderness ratios subjected to a concentrated load on the apex, using the finite element implementation of a geometrically exact rod model and the cylindrical version of the arc-length continuation method enabled with pivot-monitored branch-switching. The rod model used here includes geometrically exact kinematics of the cross-section, exact kinetics, and a linear elastic constitutive law; and advantageously employs quaternion parameters to treat the cross-sectional rotations and

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6

Song, Xi, and Shi Rong Li. "Nonlinear Stability of Fixed-Fixed FGM Arches Subjected to Mechanical and Thermal Loads." Advanced Materials Research 33-37 (March 2008): 699–706. http://dx.doi.org/10.4028/www.scientific.net/amr.33-37.699.

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Based on Kirchhoff’s assumption of straight normal line of beams and considering the effects of the axial elongation, the initial curvature and the stretching-bending coupling on the arch deformation, geometrically nonlinear governing equations of functionally graded arch subjected to mechanical and thermal loads are derived. In the analysis, it is assumed that the material properties of the arch vary through the thickness as a power function. As a numerical example, the critical buckling load and the corresponding mode shapes of a semicircle arch, with both of the ends fixed, subjected to nor

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7

Pi, Yong-Lin, and Mark Andrew Bradford. "Nonlinear elastic analysis and buckling of pinned–fixed arches." International Journal of Mechanical Sciences 68 (March 2013): 212–23. http://dx.doi.org/10.1016/j.ijmecsci.2013.01.018.

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8

Cai, JianGuo, Jian Feng, Yao Chen, and LiFeng Huang. "In-plane elastic stability of fixed parabolic shallow arches." Science in China Series E: Technological Sciences 52, no. 3 (February 24, 2009): 596–602. http://dx.doi.org/10.1007/s11431-009-0057-9.

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9

Albati, Mohammed, Riham Showlag, Alaa Akili, Halah Hanafiyyah, Hanadi AlNashri, Waad Aladwani, Ghaida Alfarsi, Mashael Alharbi, and Abdulrahman Almutairi. "Space maintainers application, indication and complications." International Journal Of Community Medicine And Public Health 5, no. 11 (October 25, 2018): 4970. http://dx.doi.org/10.18203/2394-6040.ijcmph20184251.

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Abstract (sommario):

Dental space maintenance is essential in cases of premature loss of primary dentition to prevent malposition, supra-eruption, impaction, or crowding of the developing permanent teeth. Many types of space maintainers are available and each type is specifically designated for particular indications. Space maintainers have many classifications according to their design, their fixation pattern, their position, and their site. They can be fixed, semi-fixed, or removable, with or without loops, wires, and/or bands, unilateral or bilateral, and are placed on mandibular or maxillary arches. The most c

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10

Bradford, M. A., and Y. L. Pi. "Flexural–torsional buckling of fixed steel arches under uniform bending." Journal of Constructional Steel Research 62, no. 1-2 (January 2006): 20–26. http://dx.doi.org/10.1016/j.jcsr.2005.02.012.

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11

Tebo, Emmanuel-Peters Teke, Leonard Masu, and Patrick Nziu. "Effects of Factors That Influence Out-of-Plane Lateral-Torsional Buckling on Freestanding Circular Arches." Journal of Engineering 2020 (May 1, 2020): 1–12. http://dx.doi.org/10.1155/2020/4892070.

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This paper presents the effects of the several factors that influence lateral-torsional buckling on freestanding circular arches. The studied factors that attribute to the effects of lateral-torsional buckling include cross section type, included angle, slender ratio, imperfection, loading, and boundary conditions. From the reviewed studies, the misrepresentation of these factors to a certain extent may yield inaccurate results. Several studies and design codes have proposed different solutions to account for these factors in designs against lateral-torsional buckling for some structural eleme

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12

Song, Xiaochun, Hanwen Lu, Airong Liu, and Yonghui Huang. "In-Plane Instability of Fixed Arches under Linear Temperature Gradient Field and Uniformly Distributed Radial Load." Mathematical Problems in Engineering 2019 (August 18, 2019): 1–12. http://dx.doi.org/10.1155/2019/5938030.

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This paper focuses on an in-plane instability analysis of fixed arches under a linear temperature gradient field and a uniformly distributed radial load, which has not been reported in the literature. Combining a linear temperature gradient field and uniformly distributed radial load leads to the changes in axial expansion and curvature of arches, producing the complex in-plane nonuniform bending moment and axial force. Therefore, it is necessary to explore the in-plane thermoelastic mechanism behavior of fixed arches under a linear temperature gradient field and a uniformly distributed radial

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13

Saneja, Ritu, Atul Bhatnagar, Nancy Raj, and Pavan Dubey. "Semiprecision attachment: a connecting link between the removable and fixed prosthesis." BMJ Case Reports 13, no. 8 (August 2020): e233744. http://dx.doi.org/10.1136/bcr-2019-233744.

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Oral rehabilitation of partially edentulous arches requires careful treatment planning before any prosthodontic intervention. The connection of the metal framework of fixed (fixed dental prosthesis (FPD)) and removable partial denture using adhesive attachments is a good alternative prosthetic option when solely fixed prosthesis (FPD or implant) cannot be used due to anatomical limitation. Attachments are the tiny interlocking devices that act as a hybrid link to join removable prosthesis to the abutment and direct the masticatory forces along the long axis of the abutment. This joint acts as

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14

Parajuli, Umesh, Manish Bajracharya, Manju Pandey, Ima Gurung, and Sapna Laxmi Tuladhar. "Assessment of arch width changes in Class I and Class II Division 1 patients treated with fixed orthodontics." Journal of Gandaki Medical College-Nepal 14, no. 1 (June 13, 2021): 3–7. http://dx.doi.org/10.3126/jgmcn.v14i1.37023.

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Background: The orthodontic treatment should aim to maintain the inter-canine and inter-molar width to that of the pre-treatment values. The study was conducted with objective to evaluate arch width changes in Class I and Class II patients treated with fixed orthodontics. Methods: This was a hospital-based cross-sectional study with two study groups. The first group included patients with Class I malocclusion, treated with four first premolar extractions and the second group included patients with Class II Div 1 malocclusion, treated with upper two first premolar extractions. The inter-c

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15

Lu, Hanwen, Airong Liu, Yong-Lin Pi, Mark Andrew Bradford, Jiyang Fu, and Yonhui Huang. "Localized loading and nonlinear instability and post-instability of fixed arches." Thin-Walled Structures 131 (October 2018): 165–78. http://dx.doi.org/10.1016/j.tws.2018.06.019.

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16

Pi, Yong-Lin, and Mark Andrew Bradford. "Out-of-Plane Strength Design of Fixed Steel I-Section Arches." Journal of Structural Engineering 131, no. 4 (April 2005): 560–68. http://dx.doi.org/10.1061/(asce)0733-9445(2005)131:4(560).

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17

Pi, Yong-Lin, and Mark A. Bradford. "In-plane strength and design of fixed steel I-section arches." Engineering Structures 26, no. 3 (February 2004): 291–301. http://dx.doi.org/10.1016/j.engstruct.2003.09.011.

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18

Pi, Yong-Lin, Mark Andrew Bradford, and Airong Liu. "Nonlinear Equilibrium and Buckling of Fixed Shallow Arches Subjected to an Arbitrary Radial Concentrated Load." International Journal of Structural Stability and Dynamics 17, no. 08 (October 2017): 1750082. http://dx.doi.org/10.1142/s0219455417500821.

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This paper is concerned with an analytical study of the nonlinear in-plane equilibrium and buckling of fixed shallow circular arches that are subjected to an arbitrary radial concentrated load. The structural behavior of an arch under an arbitrary radial concentrated load is quite different from that of an arch under a central concentrated load. It is shown that a fixed arch under an arbitrary radial concentrated load can buckle in a limit point instability mode, but cannot buckle in a bifurcation mode, which is different from that of a fixed arch under a central concentrated load that can buc

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19

Almeida, Kélei Cristina de Mathias, Ricardo Fabris Paulin, Taísa Barnabé Raveli, Dirceu Barnabé Raveli, and Ary Santos-Pinto. "Two-Step Extraction of the Lower First Molar for Class III Treatment in Adult Patient." Case Reports in Dentistry 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/1580313.

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The aim of this article is to describe a case report of Class III malocclusion treatment with lower first molar extraction. The 27-year-old Caucasian male patient presented a symmetric face with a straight profile, hyperdivergent growth pattern, molar and cuspid Class III relation, and an anterior crossbite as well as a mild crowding on cuspids area, in both upper and lower arches and a tendency to posterior crossbite. The treatment was performed by the use of Haas expansion appliance followed by an initial alignment and leveling of the upper and lower arches with a fixed edgewise appliance, e

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20

Kiss, László. "Stability of pinned-rotationally restrained arches." Theoretical and Applied Mechanics, no. 00 (2020): 10. http://dx.doi.org/10.2298/tam200402010k.

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The article aims to find the buckling loads for pinned-rotationally restrained shallow circular arches in terms of the rotational end stiffness, geometry and material distribution. The loading is a concentrated vertical force placed at the crown. A geometrically nonlinear model is presented which relates not only the axial force but also the bending moment to the membrane strain. The nonlinear load-strain relationship is established between the strain and load parameters. This equation is then solved and evaluated analytically. It turns out that the stiffness of the end-restraint has, in gener

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21

Ho, K. K., and W. J. S. Kerr. "Arch Dimensional Changes during and following Fixed Appliance Therapy." British Journal of Orthodontics 14, no. 4 (November 1987): 293–97. http://dx.doi.org/10.1179/bjo.14.4.293.

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A retrospective investigation of the study casts of 23 subjects, treated by Fixed Appliances and the extraction of four premolars, using the Reflex Metrograph showed a general trend for a reduction in mean arch dimensions both during and following treatment. An exception was demonstrated in the inter-canine width, which for both arches showed slight expansion during treatment, although this was lost post-treatment in the mandibular arch while it was maintained in some cases in the maxillary arch.

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22

MIRMIRAN, AMIR, AMDE M. AMDE, and ZEFANG XU. "ELASTO-PLASTIC BUCKLING OF PRESTRESSED ARCHES." International Journal of Structural Stability and Dynamics 02, no. 03 (September 2002): 295–313. http://dx.doi.org/10.1142/s0219455402000580.

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Intentional buckling as a fabrication technique for arch frameworks results in prestrains at every section of the arch, which in turn affect its strength and stability. A nonlinear corotational straight beam element with elastic, linear strain hardening material has been developed to study the elasto-plastic buckling of prestressed arches. The study indicates that for prestressed arches there is an interdependence between the slenderness and steepness ratios of the arch with the ratio of prestresses to the yield strength of the material, all of which control the magnitude and shape of buckling

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23

Dou, Chao, Yan-Lin Guo, Yong-Lin Pi, Si-Yuan Zhao, and Mark Andrew Bradford. "Effects of shape functions on flexural–torsional buckling of fixed circular arches." Engineering Structures 59 (February 2014): 238–47. http://dx.doi.org/10.1016/j.engstruct.2013.10.028.

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24

Castellano, Anna, Aguinaldo Fraddosio, Jacopo Scacco, Gabriele Milani, and Mario Daniele Piccioni. "Dynamic Response of FRCM Reinforced Masonry Arches." Key Engineering Materials 817 (August 2019): 285–92. http://dx.doi.org/10.4028/www.scientific.net/kem.817.285.

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The problem of the dynamic behavior of masonry arches and vaults has gained increasing interest in recent years, since the key role of these structural elements in the masonry constructions, especially of historic interest. Despite this, the literature still lacks a sufficiently large number of contributions on this important subject, and this deficiency is even more marked for the case of reinforced masonry. In this context, the present paper shows and discusses some preliminary experimental results on full-scale dynamic tests on unreinforced and GFRCM-reinforced Apulian tuff masonry arches.

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25

Claro, Cristiane Aparecida de Assis, Jorge Abrão, and Silvia Augusta Braga Reis. "Forces in stainless steel, TiMolium® and TMA® intrusion arches, with different bending magnitudes." Brazilian Oral Research 21, no. 2 (June 2007): 140–45. http://dx.doi.org/10.1590/s1806-83242007000200008.

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The present study compared forces in stainless steel, TiMolium® and TMA®, V-bend intrusion arches with different magnitudes of flexion. The sample consisted of rectangular-section wires, caliber .017" x .025", with ten arches of each alloy. All V-bends were made 48 mm from the midline, using the same phantom upper jaw, maintaining the same distance between the tubes fixed to the molars and the midline. Loads necessary to deflect the arches by 5, 10, 15 and 20 mm were measured by means of an Instron dynamometer with a 1 kgf load cell. Calculations for sample size confirmed the suitability of us

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26

Yang, Zhicheng, Jiamian Xu, Hanwen Lu, Jiangen Lv, Airong Liu, and Jiyang Fu. "Multiple Equilibria and Buckling of Functionally Graded Graphene Nanoplatelet-Reinforced Composite Arches with Pinned-Fixed End." Crystals 10, no. 11 (November 5, 2020): 1003. http://dx.doi.org/10.3390/cryst10111003.

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This paper presents an analytical study on the multiple equilibria and buckling of pinned-fixed functionally graded graphene nanoplatelet-reinforced composite (FG-GPLRC) arches under central point load. It is assumed that graphene nanoplatelets (GPLs) in each GPLRC layer are uniformly distributed and randomly oriented with its concentration varying layer-wise along the thickness direction. The Halpin–Tsai micromechanics-based model is used to estimate the effective elastic modulus of GPLRC. The non-linear equilibrium path and buckling load of the pinned-fixed FG-GPLRC arch are subsequently der

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27

Hajrasi, Manar K., Ahmad A. Al-Fraidi, Abdulkarim A. Hatrom, and Ali H. Hassan. "Nonextraction Management of Severely Malaligned and Constricted Upper Arch." Case Reports in Dentistry 2020 (August 25, 2020): 1–9. http://dx.doi.org/10.1155/2020/8836061.

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This case report presents the treatment of a 12-year-old female with a severely crowded upper arch, severely palatally displaced upper premolars and lateral incisors, large midline diastema, lower midline deviation to the right, class III dental and skeletal relationships due to mild maxillary deficiency, retroclined lower incisors, straight profile, and retrusive lips. A nonextraction treatment approach is described, in which the upper and lower arches were expanded to their original three dimensions using a trihelix expander, a lip bumper appliance, and a fixed orthodontic appliance. Retenti

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28

Huh, Yoon-Hyuk, Yang-Jin Yi, Min-Jung Kwon, Young-Kyun Kim, and Min-Sang Cha. "Clinical outcomes of implant supported fixed-hybrid prostheses in the fully edentulous arches." Journal of Korean Academy of Prosthodontics 51, no. 3 (2013): 183. http://dx.doi.org/10.4047/jkap.2013.51.3.183.

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29

YABUKI, Tetsuya, Le-Wu LU, and Shigeru KURANISHI. "An ultimate strength design aid for fixed-end steel arches under vertical loads." Doboku Gakkai Ronbunshu, no. 380 (1987): 141–49. http://dx.doi.org/10.2208/jscej.1987.380_141.

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YABUKI, Tetsuya, and Shigeru KURANISHI. "Ultimate strength design provisions for fixed-end steel arches with variable cross-sections." Doboku Gakkai Ronbunshu, no. 392 (1988): 103–9. http://dx.doi.org/10.2208/jscej.1988.392_103.

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31

Wu, Xinrong, Changyong Liu, Wei Wang, and Yuyin Wang. "In-Plane Strength and Design of Fixed Concrete-Filled Steel Tubular Parabolic Arches." Journal of Bridge Engineering 20, no. 12 (December 2015): 04015016. http://dx.doi.org/10.1061/(asce)be.1943-5592.0000766.

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32

Pi, Yong-Lin, and Mark Andrew Bradford. "In-plane thermoelastic behaviour and buckling of pin-ended and fixed circular arches." Engineering Structures 32, no. 1 (January 2010): 250–60. http://dx.doi.org/10.1016/j.engstruct.2009.09.012.

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33

Udupi, Suman, and Pushpa Gowda. "Patterns of Arterial Arcades of the Superficial Palmar Arch: A Study In Embalmed Cadaver Palms." International Journal of Anatomy and Research 9, no. 3.3 (September 5, 2021): 8097–102. http://dx.doi.org/10.16965/ijar.2021.156.

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Background: The complex and variable pattern of the arterial arcades of the palm form an interesting area of study anatomically and surgically. In the present study arches were classified into complete and incomplete types, the complete type being the most prominent in 88.6% of the palms. Among the complete type, arch formed by ulnar artery alone supplying the thumb and index finger was found in majority of the specimens (50%). The classical or standard superficial palmar arch formed by the superficial palmar branch of radial and ulnar arteries was found in only 28.5%. Different patterns of th

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34

Teke Tebo, Emmanuel-Peters, Leonard Masu, and Patrick Nziu. "Inelastic Lateral-Torsional Buckling Load on Fixed Circular Channels Arches Under Transverse Point Load." International Journal of Engineering Research and Technology 13, no. 10 (October 31, 2020): 2851. http://dx.doi.org/10.37624/ijert/13.10.2020.2851-2863.

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35

Teke Tebo, Emmanuel-Peters, Leonard Masu, and Patrick Nziu. "Elastic Lateral-Torsional Buckling Load on Circular Fixed Channels Arches Under Transverse Point Load." International Journal of Engineering Research and Technology 13, no. 10 (October 31, 2020): 2870. http://dx.doi.org/10.37624/ijert/13.10.2020.2870-2883.

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36

Lu, Hanwen, Lulu Liu, Airong Liu, Yong-Lin Pi, Mark Andrew Bradford, and Yonghui Huang. "Effects of movement and rotation of supports on nonlinear instability of fixed shallow arches." Thin-Walled Structures 155 (October 2020): 106909. http://dx.doi.org/10.1016/j.tws.2020.106909.

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37

Romeo, Eugenio, Diego Lops, Emilio Margutti, Marco Ghisolfi, Matteo Chiapasco, and Giorgio Vogel. "Implant-supported fixed cantilever prostheses in partially edentulous arches. A seven-year prospective study." Clinical Oral Implants Research 14, no. 3 (May 2003): 303–11. http://dx.doi.org/10.1034/j.1600-0501.2003.120905.x.

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38

Liu, Airong, Zhicheng Yang, Mark Andrew Bradford, and Yong-Lin Pi. "Nonlinear Dynamic Buckling of Fixed Shallow Arches under an Arbitrary Step Radial Point Load." Journal of Engineering Mechanics 144, no. 4 (April 2018): 04018012. http://dx.doi.org/10.1061/(asce)em.1943-7889.0001425.

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39

Guo, Yan-Lin, Si-Yuan Zhao, Yong-Lin Pi, Mark Andrew Bradford, and Chao Dou. "An experimental study on out-of-plane inelastic buckling strength of fixed steel arches." Engineering Structures 98 (September 2015): 118–27. http://dx.doi.org/10.1016/j.engstruct.2015.04.029.

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40

Pi, Y. L., and M. A. Bradford. "Effects of prebuckling deformations on the elastic flexural-torsional buckling of laterally fixed arches." International Journal of Mechanical Sciences 46, no. 2 (February 2004): 321–42. http://dx.doi.org/10.1016/j.ijmecsci.2004.02.012.

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41

Pi, Yong-Lin, and Mark Andrew Bradford. "Nonlinear dynamic buckling of pinned–fixed shallow arches under a sudden central concentrated load." Nonlinear Dynamics 73, no. 3 (March 27, 2013): 1289–306. http://dx.doi.org/10.1007/s11071-013-0863-2.

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42

Mahoorkar, Sudhindra Sudhakar, V. Somwanshi Adesh, and Manju George. "Rehabilitation of Edentulous Arches with Fixed Prosthesis Supported by Tilted Implants: A Systematic Review." International Journal of Prosthodontics and Restorative Dentistry 11, no. 1 (August 12, 2021): 33–53. http://dx.doi.org/10.5005/jp-journals-10019-1299.

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43

Kochar, Gagan Deep. "Management of Tooth Size Arch Perimeter Discrepancy: An Indian Board of Orthodontics Case Report." Journal of Indian Orthodontic Society 55, no. 3 (July 2021): 310–14. http://dx.doi.org/10.1177/03015742211026217.

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Abstract (sommario):

This case was submitted to the board under Category I for the Indian Board of Orthodontics examination. This communication describes the management of a female patient who presented with severe crowding in both upper and lower arches. Comprehensive fixed orthodontic mechanotherapy including extractions of all first premolars was carried out. Stable harmonious occlusion was achieved on long-term follow-up.

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44

Costea, Radu Cătălin, Viorel Ștefan Perieanu, Claudia-Camelia Burcea, Mihai Burlibaşa, Mihaela Chirilă, Narcis Marcov, Gabriela Tănase, et al. "Practical Aspects Regarding Magnetic Retained Overdenture." Acta Medica Transilvanica 26, no. 2 (June 1, 2021): 62–66. http://dx.doi.org/10.2478/amtsb-2021-0037.

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Abstract Overdenture is a type of treatment suitable for subtotal and complete edentulous patients and is characterized by making a total prosthesis, with the mucosal face embedding remaining teeth (remaining roots) or dental implants. In this material we will try to present some practical aspects, regarding retained overdenture with magnetic systems fixed in the remaining roots at the level of the dental arches.

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45

Battagel, Joanna M., A. S. Johal, and V. P. Crow. "The Assessment of Crowding without the Need to Record Arch Perimeter. Part II: Crowded and Irregular Arches." British Journal of Orthodontics 23, no. 3 (August 1996): 229–36. http://dx.doi.org/10.1179/bjo.23.3.229.

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A mathematically determined technique which seemed to be valid for the calculation of crowding and spacing in arches with acceptable alignment, was tested on a series of arches with varying degrees of crowding and irregularity. Upper and lower study casts of 30 individuals with sufficient malalignment and crowding to warrant orthodontic treatment with fixed appliances were examined. Models were measured by three operators, using a reflex microscope interfaced to an IBM compatible PC and a customized calculation program. The degree ofcrowdmg was compared with a ‘clinical’ assessment of each arc

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Sfondrini, Maria Francesca, Simone Gallo, Benedetta Turcato, Mona A. Montasser, Nehal Fouad Albelasy, Pekka K. Vallittu, Paola Gandini, and Andrea Scribante. "Universal Adhesive for Fixed Retainer Bonding: In Vitro Evaluation and Randomized Clinical Trial." Materials 14, no. 6 (March 10, 2021): 1341. http://dx.doi.org/10.3390/ma14061341.

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Abstract (sommario):

This study aims to assess the efficacy of a universal adhesive (Scotchbond Universal, 3M ESPE) (SB) in total-etch mode, compared to a traditional orthodontic primer (Transbond XT Primer, 3M ESPE) (XT Primer), to perform bonding of orthodontic fixed retainers along with the Transbond XT Light Cure Adhesive Paste (3M ESPE). For the in vitro study, a round section wire (Ortosmail Krugg) was bonded using XT Primer for 20 bovine incisors (Group 1) and SB for other 20 (Group 2). Samples were debonded in a universal testing machine applying a tangential force to specimens (crosshead speed of 1 millim

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Mihali, Sorin Gheorghe, and Emanuel Adrian Bratu. "Clinical Outcomes in Implant-Supported Full-Arch Fixed Prosthesis Utilizing Pressed Composite Restorations." Materiale Plastice 54, no. 4 (December 30, 2017): 795–99. http://dx.doi.org/10.37358/mp.17.4.4948.

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The author wants to evaluate the clinical advantages and limitations of the composite pressed on metal framework for full-arch implant-supported fixed prosthesis in comparing with dental ceramic restorations. A total of thirty-two edentulous arches were restored. All complications were recorded at each follow-up visit up to 1 year after insertion. No complications were reported on pressed composite restoration. Complications were found in the ceramic restorations like chipping or fracture of the ceramic veneer. The composite pressed restorations are a treatment option for full arch restoration

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48

Yang, Zhicheng, Airong Liu, Yong-Lin Pi, Jiyang Fu, and Zhongkang Gao. "Nonlinear dynamic buckling of fixed shallow arches under impact loading: An analytical and experimental study." Journal of Sound and Vibration 487 (November 2020): 115622. http://dx.doi.org/10.1016/j.jsv.2020.115622.

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49

Pi, Yong-Lin, Mark Andrew Bradford, and Weilian Qu. "Energy approach for dynamic buckling of shallow fixed arches under step loading with infinite duration." Structural Engineering and Mechanics 35, no. 5 (July 30, 2010): 555–70. http://dx.doi.org/10.12989/sem.2010.35.5.555.

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50

Wei, Jiangang, Qingxiong Wu, Baochun Chen, and Ton-Lo Wang. "Equivalent Beam-Column Method to Estimate In-Plane Critical Loads of Parabolic Fixed Steel Arches." Journal of Bridge Engineering 14, no. 5 (September 2009): 346–54. http://dx.doi.org/10.1061/(asce)1084-0702(2009)14:5(346).

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