نتایج جستجو برای: tooth deformation
تعداد نتایج: 160412 فیلتر نتایج به سال:
RV reducers are commonly employed in precision transmissions, such as robot joints, owing to their multi-tooth contact characteristics, strong impact resistance, and low backlash. A finite element modal analysis of the reducer was conducted this study reduce influence vibration on transmission performance improve its characteristics. The characteristics analyzed according principles. Combined w...
سطح مقطع و توزیع زوایه ای شکافت هسته 230th فعل و انفعال 230th(n,f) در انرژیهای en=682,715,730,740,730kev با استفاده از روش hauser feshback محاسبه شده و نتایج حاصبه با مقادیر تجربی آنها مقایسه گردیده اند. محاسبات مشابهی نیز در مورد هسته 234u، فعل و انفعال 234u (n,f) با انرژیهای نوترون حدود en=300 kev انجام گرفته است . از این بررسی ها رزونانسی با عدد کوانتمی k برابر 1.2 با پارتیه منفی نشان داده ش...
introduction: to compare the effects of 0.05% sodium fluoride (naf) mouthrinse, gc tooth mousse and gc mi paste plus on white spot formation inhibition. materials and methods: thirty pairs of extracted human premolars were cut in half mesio-distally with a disc. the teeth were coated with nail varnish, except a part of the buccal and/or lingual enamel, which was used as the test area, and then ...
Many vertebrates replace teeth through shedding of the functional tooth. New analyses of a fossil fish demonstrate that shedding involved tooth resorption, a primitive feature in bony fishes, but absent in sharks and their relatives.
Whole-organ regeneration has great potential for the replacement of dysfunctional organs through the reconstruction of a fully functional bioengineered organ using three-dimensional cell manipulation in vitro. Recently, many basic studies of whole-tooth replacement using three-dimensional cell manipulation have been conducted in a mouse model. Further evidence of the practical application to hu...
Aim. To report a case with an unusual drainage route of periapical inflammation exiting through the gingival sulcus of an adjacent vital tooth and review probable factors determining the diversity of the discharge routes of periapical inflammation. Summary. An 18-year-old male patient presented with periodontal abscess of tooth 46, which was found to be caused by a periapical cyst with an acute...
Fracture of anterior teeth due to trauma is the most frequent type of injury affecting permanent dentition. Despite the availability of a wide range of restorative materials, none could match the properties of natural tooth structure like translucency, wear resistance, and color stability. Hence fragment re-attachment is an excellent method of restoring fractured teeth. When the fractured fragm...
Aeronautical thin-walled frame workpieces are usually obtained by milling aluminum alloy plates. The residual stress within the workpiece has a significant influence on deformation due to relatively low rigidity of workpiece. To accurately predict milling-induced stress, this paper describes an orthogonal experiment for 7075 at different surface depths workpiece, without initial is obtained. pa...
Abstract. The tooth surface friction effects and the resulting contact temperature are important factors for dynamic characteristics of a gear-rotor system in compressed air energy storage (CAES). Therefore, 3∘ freedom finite-element model is set up which lubrication state gear pair, friction, surface, backlash unbalanced excitation considered. coefficient calculated according to variation stat...
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