Vector Bond Graph Method of Kineto-static Analysis for Planar Multi-body System with Gear Pair by Wang Zhongshuang, Zhao Yanwei, Tao Yangyang, Cao Jianguo

“…In order to increase the reliability and efficiency of the kineto-static analysis of complex planar multi-body system,the corresponding vector bond graph method is proposed.According to the kinematic constraint condition,the vector bond graph model of a gear pair with arbitrary tooth profile of tooth is built.Based on this,the theoretical method to build the planar multi-body systems model with gear pair by vector bond graph is given.For the algebraic difficulties brought by differential causality and nonlinear junction structure in modeling and kineto-static analysis of planar multi-body systems with gear pair,the effective bond graph augment method is proposed.By the corresponding algorithm,the computer aided modeling and kineto-static analysis of planar multi-body system with gear pair on a computer is realized,the validity of this method is illustrated.…”
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Research of the Effect of Profile Deviation on Contact Characteristic of Helical Gear by Luo Tao, Qin Xunpeng, Huang Jinjing

“…In order to study the influence of profile deviations on the contact characteristic of the helical gear,the involutes equation containing the profile form deviation and profile slope deviation is deduced.On the meanwhile,a finite element model containing tooth profile deviations is established.Based on this finite element model,the effect law of the profile form deviation and profile slope deviation on the maximum contact stress,bending stress and load distribution is obtained.The result suggests that the contact strength and bending strength of gears is reduced by the profile form deviation and profile slope deviation and the load distribution status is changed.When the profile form deviation is larger than 5μm or the profile slope deviation equals to ±0.5°,the gearwill gradually change tooth meshing number from three to two,then two to one,which brings certain impact on the carrying capacity of gear.…”
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Effects of Palatal Expansion with Torque Activation using a Transpalatal Arch: A Preliminary Single-Blind Randomized Clinical Trial by Fataneh Ghorbanyjavadpour, Vahid Rakhshan

“…This is an important clinical issue; therefore, this study was conducted to show the effects of an active Goshgarian TPA in correcting nonfunctional single-tooth unilateral crossbite. Methods. The present single-blind, randomized clinical trial examined 60 observations on 30 individuals with nonfunctional single-tooth unilateral crossbites in the first permanent molar area. …”
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Epidemiological Profile of the Pathologies of the Oral Cavity in a Peruvian Population: A 9-Year Retrospective Study of 18,639 Patients by Ángelo Sabogal, Jhonn Asencios, Ada Robles, Eloy Gamboa, José Rosas, Jorge Ríos, Frank Mayta-Tovalino

“…We found a significant association between sex and different types of dental caries, disturbances in tooth eruption, diseases of pulp and periapical tissues, and dentofacial anomalies. …”
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An unusual surgical complication: Slipped molar lodged in vocal cords and its anesthetic management by Ameerunnisha begum, Ramsesh Manohar Ram, Monisha Prasad

“…Background: Extraction of wisdom tooth is one of the most common surgical interventions, as it is more prone for impaction. …”
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Unified Compact Formulas of Output Characteristics for External Hydraulic Gear-motors by Liu Ping, Li Yulong, Hou Xinyu, Zhang Lihua

“…In order to correctly understand the output characteristics of gear-motors with different types of backlash sizes/offset unloading slots, a unified simplified formula for output characteristics such as speed/torque is constructed based on the different meshing line intervals of meshing tooth profiles/output characteristics, using the type value that measures the backlash size and the offset value between the symmetrical line of the double unloading slots and the centerline of the gear pair as variables. …”
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Dental Erosion and Dentinal Sensitivity amongst Professional Wine Tasters in South East Queensland, Australia by Roy George, Allison Chell, Belinda Chen, Rebecca Undery, Humza Ahmed

“…Participants were also required to rate their tooth sensitivity prior to being examined for erosion using a modified Smith & Knight tooth wear index. …”
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Prevalence of supernumerary teeth among a sample of patients attending college of dentistry in Erbil, Iraq by Fighan Jalal Hussein, Heran Ibrahim Hassan, Alaa Mahmud Mustafa

“… Background and Objectives: A supernumerary tooth is an additional tooth to the normal series and can be located in almost any region of the dental arch. …”
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The Role of Bovine Amniotic Membrane and Hydroxyapatite for the Ridge Preservation by Octarina Octarina, Elly Munadziroh, Fathilah Abdul Razak, Ekowati Handharyani, Meircurius Dwi Condro Surboyo

“…Ridge preservation is an important technique for maintaining the dimensions of the alveolar bone following tooth extraction, which is crucial for successful tooth rehabilitation. …”
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Dental Status and Associated Factors in a Dentate Adult Population in Bulgaria: A Cross-Sectional Survey by Nikola D. Damyanov, Dick J. Witter, Ewald M. Bronkhorst, Nico H. J. Creugers

“…Age, gender, education, and tooth brushing revealed most noticeable associations. …”
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Radiographic Follow-Up during Orthodontic Treatment for Early Diagnosis of Sequential Supernumerary Teeth by Selma Sano Suga, Paula de Castro Kruly, Talissa Mayer Garrido, Marise Sano Suga Matumoto, Uhana Seifert Guimarães Suga, Raquel Sano Suga Terada

“…The first case describes the radiographic follow-up of a female patient that presented a supernumerary tooth at the age of 9 years and 10 months in the right mandibular premolar region, followed by a further supernumerary tooth in the left mandibular premolar region identified at the age of 11 years and 3 months. …”
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Effect of Different Surface Modifications of Acrylic Teeth and Thermocycling on Shear Bond Strength to Polycarbonate Denture Base Material by Humam M. Al-Somaiday, Aula Kamal Rafeeq, Manar E. Al-Samaray

“…Incompatible surface conditions at the tooth/denture base interface result in a lack of bonding. …”
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Alimentation d’une population historique by Estelle Herrscher

“…Tooth wear, caries, and alveolar modifications provide the most common and most informative evidence regarding the nutritional condition of past populations. …”
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Apicoectomy: A review of clinical concepts and techniques by Vivek Thakur, Rahul Kaul

“…Apicoectomy is the surgical approach for preserving a tooth with a large periapical lesion which may not be treated with traditional therapy. …”
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Calculation and Analysis of Mesh Stiffness of Spur Gear based on LTCA by Zhengjiu Feng, Guanghu Jin, Rupeng Zhu

“…Using Matlab software and three-dimensional finite element method, the flexibility matrix of spur gear tooth surface is obtained, and three calculation methods of matrix are compared and analyzed. …”
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Detection and Classification of Single Machining Error of Non-circular Gear by Dai Jianqing, Wang Shengze

“…The studies on non-circular gear cutting and using errors are generally based on theory of cylindrical gear errors,and the similarities and differences between cylindrical gear and non-circular gear are combined to study the change rule of non-circular gear contacting line and obtained corresponding conclusions.From a different perspective,by starting from the non-circular gear engagement principle,on the basis of analyzing the concrete geometric error conditions,the new type tooth profile algorithm routine is reasonably modified,and the non-circular gear tooth profile error contrast figure is obtained.Furthermore,the theoretical verification is carried out by incorporating analytical method and contacting line incremental method,a reasonable classification method is proposed based on the characterization of the error characteristic code in the general case and the error genetic map used to guide practical production is summed up which possess enormous significance to non-circular gear machining.…”
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Failure Analysis of Sun Gear Splines in Fan Gearboxes by Ren Yanyan, Wang Yaqiang

“…The failure of sun gear splines is mainly caused by low tooth surface hardness. At the same time, due to the comprehensive action of fatigue wear, chemical corrosion, abrasive wear and other wear mechanisms, serious tooth surface wear occurs, resulting in a decrease of the bearing capacity of IMS sun gear motor side splines. …”
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STUDY ON VIBRATION CHARACTERISTICS OF THE POLYGON EFFECT OF SCRAPER CONVEYOR by ZHANG DongSheng, YU HaiYang, ZHAO XiBei, SONG ZhenDuo

“…The results showed that: the most important parameter of the chain is the number of sprocket teeth,and the running stability of the scraper conveyor is proportional to the number of sprocket teeth,13 tooth sprocket stability is far stronger than 9 tooth sprocket scraper conveyor; polygon effect there side impact load on the chain tension fluctuation significantly higher than the no-load side; the reaction sensitivity of polygon effect is inversely proportional to the length of the chain length of the scraper conveyor and sprocket selection provides a theoretical basis,and to Study on dynamic characteristics of research methods and provides a theoretical basis.…”
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Optimization Design and Simulation Analysis of Cycloid Pin Gear Planetary Reducer by Liang Kaixiang, Wang Zhongsu, Tian Shitao, Wu Qingwen, Xu Zhenbang

“…A set of equations is presented to optimize the cycloid pin gear reducer with pillow needle tooth structure instead of the cantilever type tooth structure,which is of compact and high strength. …”
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Simulation for Reduction of Windage Loss of Spiral Bevel Gear by 梁作斌, 张茂强, 樊拓

“…The similar trends are obtained with different gear tooth tangential velocities.…”
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