METHOD FOR MODIFYING PROFILE OF CYCLOIDAL WHEEL CONSIDERING COMPENSATION FOR ELASTIC DEFORMATION by QIN ZhengZheng, WANG Quan, ZHAO DaXing, WANG Jun, ZENG LiLei

“…The coordinate transformation principle was used to fit the profile of the cycloid after elastic deformation,and the theoretical calculation of the contact force of the cycloid tooth surface was carried out. And the mathematical model of the profile modification of the cycloid with elastic deformation characteristics was established,which was solved by genetic algorithm and compared with the modification method without considering elastic deformation.The results show that compared with the modification method without considering elastic deformation,the fitting degree of the actual working tooth profile and the angle modification tooth profile is improved to 1. 52 times,and the contact force of the tooth surface is reduced to8. 27%,thus verifying the rationality and feasibility of the method.…”
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Research of Parameterized Modeling and Finite Element Simulation of Locomotive Traction Gear by Xuan Liang, Ding Haichun, Lei Lei, Guan Tianmin, Li Zhenjun

“…The formation equation of involute tooth profile and transition curve is introduced,and the tooth profile modeling is carried out in the SolidWorks 3 D modeling software environment by Program-driven method. …”
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Dynamic Characteristic Analysis of Asymmetric Helical Gear with a Small Number of Teeth based on LS-DYNA by Zhou Qi

“…The dynamic distribution of tooth root in a meshing period of the bending stress is described. …”
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Research on the Time-varying Meshing Stiffness Algorithm of Spur Gears Based on an Improved Potential Energy Method by Xu Kejun, Jiao Wei, Qin Haiqin

“…Using this method, the parametric equation of the tooth root transition curve is considered, and based on the relative size relationship between the radius of the involute starting point, the radius of the base circle and the radius of the root circle, the tooth model with different numbers of teeth is established. …”
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Dentoalveolar characteristics in subjects with different anteroposterior relationships: a retrospective cross-sectional Cone-Beam Computed Tomography study by Obada Rawaqa, Kazem S. AlNimri, Elham S. Abu Alhaija

“…Group 1: Class I (64/tooth type), Group 2: Class II Div 1 (28/ tooth type), Group 3: Class II Div 2 (28/tooth type), and Group 4: Class III (58/ tooth type). …”
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Membrana preformativa: Unveiling the unexplored facets of dental development by Sakshi Sikaria, Suganya Panneer Selvam, Ramya Ramadoss, Sandhya Sundar

“…Among these, Ki67 and Cyclin D1 are crucial cell cycle regulators that play pivotal roles in controlling cell proliferation during tooth development. This study aims to provide detailed insights into the expression patterns and functional significance of Ki67 and Cyclin D1 in tooth development. …”
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Research of Calculation Method of Contact Stress of Non-orthogonal Modified Face-gear Drive with Helical Pinion by Yang Zhuxi, Wu Yuanhang, Tang Jinyuan

“…Firstly， based on the principle of surface meshing transmission， the tooth surface equation of non-orthogonal modified face-gear drive with helical pinion is derived. …”
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Analysis of Factor Affecting Frequency Coupling of Double Planetary Gear System by Hao Xiaohua, Yuan Xia, Bai Jinlin, Li Fenggang, Qin Jin

“…As the speed increases，the current gear tooth frequency influence ratio increases，and the load increases，the current gear tooth frequency influence ratio decrease，the coupling frequency influence ratio is opposite. …”
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FINITE ELEMENT ANALYSIS ON THE INFLUENCE OF PITTING DEFECT ON THE CONTACT STRESS OF FACE GEAR (MT) by HUANG ZhenRong, ZHANG Juan

“…Using the finite element loading tooth contact analysis method（LTCA）, the contact stress distribution and variations of maximum contact stress value and its position are obtained when the defect is in different position on the tooth surface. …”
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Traumatic Dental Injury—An Enigma for Adolescents: A Series of Case Reports by Akash Krishna, Manjunath Hampanna Malur, D. V. Swapna, Shiny Benjamin, Chris A. Deepak

“…Fractured anterior teeth are usually treated with conventional post and core and crown techniques, after being treated endodontically. If the original tooth fragment is retained following fracture, the natural tooth structures can be reattached using adhesive protocols. …”
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Optimization Design of Dynamic Thermal Boundary Carburizing Quenching Process for Spiral Bevel Gear by Liu Fuyang, Liu Ganhua, Xie Xianfeng, Zou Yang

“…In order to solve the problem that the drum length is too large and the hardness of the tooth surface is less than the requirement of noise,vibration and acceleration of the gear pair,the DEFORM-HT finite element software is used to simulate the spiral bevel gear. …”
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Influence of Non-uniform Wear on Modal Characteristics of Spur Gears by Kaiwen Lu, Juan Zhao, Jie Sun, Menghua Tan, Songnian Liu

“…The pure rolling of the gear at the node does not cause wear， and the wear at the alternation of single tooth and double tooth meshing zones has a mutation. …”
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Interdisciplinary Management of Maxillary Canine Buccal Ectopia Associated with Peg Shaped Lateral Incisor by Karuna Singh Sawhny, Asheesh Sawhny

“…In cases of extremely high displacement, the tooth is frequently removed surgically. Because of the upper canines’ significance to dental esthetics and functional occlusion, such a decision is a very serious one. …”
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PERFORMANCE OPTIMIZATION OF TRANSMISSION GEAR BASED ON OPTIMAL MODIFICATION DESIGN by HAN Wei, REN ZhiQun

“…According to the theory of tooth lead modification and tooth profile modification,the variable range of three-dimensional modification parameters of the 4 th gear is analyzed by orthogonal experiment principle. …”
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Study on Strength Failure Mechanism of Super-reduction Ratio Hypoid Gears by Yu Zhang, Peng Zhou, Zedong Li, Pei Liang, Zhiyong Wang

“…Aiming at the problems of strength and fatigue of super-reduction ratio hypoid gears， a calculation of the gear blank parameters is completed， a three-dimensional assembly model is established， and a finite element simulation is carried out on the super-reduction ratio hypoid gears； a calculation method for calculating the design parameters of the pinion from the design parameters of the large gear is derived， and the corresponding pinion and large gear tooth blanks can be calculated. Using the large gear and pinion tooth surface equations， the coordinates of the discrete points on the tooth surface are calculated in Matlab and imported into SolidWorks to realize the three-dimensional modeling of super-reduction ratio hypoid gears， and then import the model into Ansys workbench for finite element simulation； the simulation results show that the rotation speed， reverse torque and gear tooth root parts are processed with different tip fillets， which will affect the minimum fatigue life of the super-reduction ratio hypoid gears.…”
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Management of Maxillary Incisors With Middle-Third Root Perforation: A Case Report by Daysi Morocho-Monteros, María José Masson-Palacios, Juan Marcos Parise-Vasco

“…The main objective in the management of such complications is to seal the perforation, thus preventing bacterial invasion and tooth loss. This report details the case of a 70-year-old patient with a perforation in the palatal wall of the middle root section of tooth #11. …”
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SRESS AND FATIGUE LIFE OF PITTING DEFECTS ON PUMPING UNIT GEAR by BAI YunSong, MUTELLIP AhMat, BAI HaoYu, CHEN Zhi

“…The results show that with the growth of pitting defects, the contact stress increases and the fatigue life decreases; The pinion interference occurs in the transition section, the stress concentration is worst, and the fatigue life is low, the overall fatigue damage starts from the tooth top; The pitting extend along the tooth profile direction mainly affects the duration of stress concentration, and along the tooth width mainly affects the amplitude of stress change.…”
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Simulation and Experimental Verification of Microscopic Surface Morphology of Spiral Bevel Gears by Shot Peening by Liao Xianggui, Wu Hao, Tang Jinyuan, Zhao Jiuyue

“…However, inappropriate process parameters can cause a significant increase in gear surface roughness, which has an adverse effect on the contact performance of the tooth surface. In order to accurately calculate the microscopic morphology and surface roughness of the gear surface after shot peening, this study proposes a spiral bevel gear tooth surface shot peening simulation model based on a coupled discrete element method and the finite element method. …”
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Retrospective Study Comparing Clinical Outcomes of Fixed Dental Prostheses in Matched Groups of Bruxer and Nonbruxer Patients by Mohammed Hawthan, Bruno R. Chrcanovic, Christel Larsson

“…Background. Tooth-supported fixed dental prosthesis (FDP) is one of the most reliable treatment options to replace missing teeth. …”
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Computerized Generation of Nonstandard and Asymmetric Involute Spur Gears Based on Rack Cutter Parametric Tracing by Ahmed A. Toman, Mohammad Q. Abdullah

“…It is the foundation for any design modification attempts, and any approximation of the tooth profile must be avoided. In the literature, many approximations were held to the involute tooth geometry, particularly in the filet region, where it was simply represented by a straight line or circular arc instead of a true trochoidal arc from a generation process. …”
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