Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Elastics"”.
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Orthodontic Outcomes in Class II Correction with Elastics: Clear Aligners Versus Fixed Appliances
… their efficacy in Class II correction with elastics remains under-researched compared to traditional fixed appliances. Specific Aims: This study compares anteroposterior and vertical dentoalveolar, facial, and skeletal changes between clear aligners and fixed appliances. Differences in …
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The study on treatment duration for traction of impacted maxillary canine by elastics derived from skeletal anchorage
고정성 교정장치를 사용하여 매복치를 견인하는 기존의 방법을 사용하면 치근 흡수와 같은 부작용을 야기할 수 있어 최근 임시 골성 고정원과 고무줄을 사용한 매복치의 견인 방법이 제시되었다. 본 연구의 목적은 골성 고정원과 고무줄을 사용하여 매복 상악 견치를 견인하였을 때 견인 기간과 속도를 정량적으로 측정하고 이에 영향을 미치는 요인을 3차원 영상을 이용하여 조사하기 위함이다. 2011년부터 2014년까지 아주대학교병원 치과교정과에 내원한 총 1339명의 환자 중 골성 고정원과 고무줄을 이용하여 매복 상악 견치 견인을 완료한 환자 …
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Influence of geology on the water resources of the Upper Roanoke River Basin, Virginia
… and Ordovician metamorphics and elastics, Cambrian and Ordovician carbonates, and Ordovician to Mississippian elastics. Geohydrologic analyses of climate, surface-water, ground-water, and water-quality data identified the geohydrologic characteristics of each unit. Precipitation …
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A Study of the Physical Properties of Latex as Related to Orthodontic Tooth Movement
Latex elastics have long been used in orthodontics, and force decay has always been a disadvantage. Reports differ on the load-deflection properties of rubber. Decay in elastic bands has ranged from 8% to 74.9%, depending on test conditions. A study was designed to ascertain (1) whether better …
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Paleocene coal-bearing sediments of the Williston Basin, North Dakota : an interaction between fluvial systems and an intracratonic basin
… Each interval consists of medium and fine elastics underlying a persistent lignite coal, or some other lithology at the stratigraphic position of the coal. Clastics are finer-grained upwards within intervals and within both formations to the upper Sentinel Butte.</p> <p>Sand-rich zones …
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The stratigraphy and structural evolution of the late Proterozoic Gariep belt in the Sendelingsdrif-Annisfontein area, northwestern Cape Province
… Formation), and prograde into marginal marine elastics and carbonates (Gumchavib Formation). Rift faulting produced local grabens into which massflow sediments (Kaigas Formation) and volcaniclastics (Rosh Pinah Formation) were shed. During the sea-floor spreading stage, a shallow-water …
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Geology of the Humpback Mountain area of the Blue Ridge in Nelson and Augusta counties, Virginia
… separates metamorphosed Weverton and Harpers elastics from unmetamorphosed Antietam elastics. Metamorphosed Chilhowee and Catoctin sediments are characterized by formation of the following metamorphic minerals: epidote, penninite, sericite, and microcrystalline quartz. Chilhowee detritus was …
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Changes in Pharyngeal Airway Dimensions Due to MARA Treatment in Class II Malocclusions
… treated with an Edgewise appliance and Class II elastics. Both pre and post treatment CBCT images (n=140) were analyzed using Dolphin3D© imaging software and a custom cephalometric analysis module. Analysis of the airway was done in three regions defined as 1) the nasopharynx (area superior and …
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Depositional history, environments of deposition, and hydrocarbon potential of the Newcastle Formation (Lower Cretaceous) of eastern North Dakota
… eastern South Dakota or western Minnesota. These elastics were transported to western North Dakota and eastern Montana, and were deposited as nearshore bars and deltas, as well as channel fill.</p> <p>Following a brieflowstand, the sea again transgressed over the study area, redistributing the …
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Ground-water geology along the northwest foot of the Blue Ridge between Arnold Valley and Elkton, Virginia
… Cambriancarbonate rocks and fine-grained elastics underlie the relatively level areas between the mountains and the major subsequent streams near their base. A thick unconsolidated mantle which slopes gently away from the mountains conceals bedrock over much of the area. Major well fields …
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Treatment Effects of the Mandibular Anterior Repositioning Appliance (MARA) and Conventional Orthodontic Mechanics on Temporomandibular Joint Morphology: A Comparison Using Cone Beam Computed Tomography
… appliances and class II intermaxillary elastics. The CBCT scans were evaluated using Dolphin3D©. Temporomandibular joint (TMJ) measurements were recorded in the sagittal, axial, and coronal axes, and lateral cephalograms were extracted to compare groups and evaluate treatment …
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Ordovician corals of the Williston Basin periphery
… of the colonial forms for terrigenous elastics. The solitary forms were apparently not as efficient as the colonial corals in utilizing available energy under conditions of carbonate sedimentation. </p><p> A paraconformity in the subsurface of northeastern North Dakota and diastems in …
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The stratigraphy and sedimentology of the Bredasdorp group, southern Cape Province
… formations, characterised by calcareous elastics have been grouped together in a newly defined Bredasdorp Group. In order to construct a depositional model for the Bredasdorp Group, various facies have been identified on the basis of geometry, lithology, fossil contents, palaeocurrent …
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Conodont biostratigraphy of the Bakken and lower Lodgepole Formations (Devonian and Mississippian), Williston Basin, North Dakota
… conditions, winnowing out of fine-grained elastics and organic material during deposition that concentrated coarse-grained fossils and inorganic material, and selective winnowing of partially lithified sediment by evanescent currents. Lags are important stratigraphically but are of little …
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Subsurface study of the Lee formation in Buchanan County, Virginia
… terrain, the probable source of the Lee elastics, southeast of Buchanan County. Initial subsidence invited a southeastward transgression or the Lee sea which is believed to have advanced as far southeast as central Buchanan County where it probably was halted initially by the low …
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Design of a Novel Powered Exoskeleton for Human Jump Augmentation
Design of powered exoskeletons have typically focused on walking assistance, load carriage, and restoring lost functionality. This research presents the design of a novel powered exoskeleton for jumping assistance. The exoskeleton has a total mass of 24~kg (55~lb) and is capable of providing an …
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Diagnetic modelling in Middle Jurassic clastic sediments from the Ravenscar group, Yorkshire, and the Brent group, northern North Sea
… replacive ferroan calcite. In marine elastics, meanwhile, illite and potassium-feldspar overgrowths precipitated before in situ bacterial processes lowered pH here also. This resulted in dissolution of feldspars, muscovite neomorphism and precipitation of vermiform kandites. …