Results 21 to 30 of about 150,301 (303)

A Model for the Analysis of Caries Occurrence in Primary Molar Tooth Surfaces [PDF]

, 2012
Recently methods of caries quantification in the primary dentition have moved away from summary ‘whole mouth’ measures at the individual level to methods based on generalised linear modelling (GLM) approaches or survival analysis approaches. However, GLM
Stephenson, John, Stephenson, J.
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Tooth surface mismatch modification method of cycloidal bevel gear based on conjugate tooth surface modification

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2020
In order to obtain locally conjugated tooth surface contact, a tooth surface mismatch modification method is proposed based on the fully conjugated characteristics of cycloidal bevel gear.
Jing DENG, Shaowu NIE, Xiaozhong DENG, Chuang JIANG   +3 more
doaj   +1 more source

A compensation method for the eccentricity and inclination errors of spiral bevel gear based on improved ICP algorithm

Advances in Mechanical Engineering, 2021
Due to the manufacturing and assembly errors of the spiral bevel gear, the deviations between the measured tooth surface and its theoretical tooth surface will affect the measurement results of the tooth surface.
Yongsheng Liu, Yixin Chen, Suping Fang
doaj   +1 more source

Within-guild dietary discrimination from 3-D textural analysis of tooth microwear in insectivorous mammals [PDF]

, 2013
Resource exploitation and competition for food are important selective pressures in animal evolution. A number of recent investigations have focused on linkages between diversification, trophic morphology and diet in bats, partly because their roosting ...
Mark A. Purnell (3197436), M. A. Purnell, Rayfield, Emily J, G. Jones, Gill, Pamela G, G. Jones (2179224), N. Crumpton, P. G. Gill, N. Crumpton (7674182), Purnell, Mark A, Crumpton, Nicholas, E.J. Rayfield (7674188), E. J. Rayfield, P.G. Gill (7674185), Jones, Gareth   +14 more
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The evolutionary paradox of tooth wear: simply destruction or inevitable adaptation? [PDF]

, 2013
Over the last century, humans from industrialized societies have witnessed a radical increase in some dental diseases. A severe problem concerns the loss of dental materials (enamel and dentine) at the buccal cervical region of the tooth.
Grosse, Ian R., Nguyen, Huynh Nhu, Huynh Nhu Nguyen, Ian R Grosse, Hublin, J. ; https://orcid.org/, Giorgio Gruppioni (406372), Schulz, Dieter, Nguyen, N., Kullmer, Ottmar, Giorgio Gruppioni, Stefano Benazzi (227062), Stefano Benazzi, Hublin, Jean-Jacques, Kullmer, O., Dieter Schulz (406371), Gruppioni, G., Jean-Jacques Hublin, Ian R. Grosse (356268), Ian R. Grosse, Jean-Jacques Hublin (406373), Dieter Schulz, Ottmar Kullmer (164077), Benazzi, S. ; https://orcid.org/, Schulz, D., Benazzi, Stefano, Huynh Nhu Nguyen (406370), Gruppioni, Giorgio, Grosse, I., Ottmar Kullmer, Jean Jacques Hublin   +29 more
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Study on the tooth surface wear characteristics of helical gears under mixed elastohydrodynamic lubrication [PDF]

Mechanical Sciences
Existing research on tooth surface wear of helical gears has insufficiently considered the complex and variable lubrication conditions between meshing tooth surfaces.
Z. Yin, Z. Yin, Z. Yin, B. Liu, C. Yang, H. Wang, X. Fu, J. Xu, Z. Fan   +8 more
doaj   +1 more source

Poly(alkyl methacrylate) tooth coatings for dental care: evaluation of the demineralisation-protection benefit using a time-resolved in vitro method [PDF]

, 2011
An in vitro method for the time-resolved quantification of acid-mediated tooth demineralisation has been developed and evaluated against putative non-permanent protective formulations based on a series of poly(alkyl methacrylate)s.
Birthe V. Nielsen, John Tsibouklis, Rees, G., Nielsen, Birthe V., Thomas G. Nevell, Tsibouklis, John, Nevell, Tom, Eugen Barbu, Nielsen, B., Smith, James, Gareth D. Rees, James R. Smith, Barbu, Eugen, Smith, James R., Rees, Gareth D., Nevell, Thomas G., GlaxoSmithKline R&D (Gareth D. Rees)   +16 more
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A flank modification method for spiral bevel gears based on mismatch topography adjustment

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2018
In order to improve the meshing performance or correct contact area of spiral bevel gears, a new method of tooth surface topography modification is proposed in this paper.
Shaowu NIE, Jing DENG, Xiaozhong DENG, Longlong GENG   +3 more
doaj   +1 more source

The incidence rate of caries on individual tooth surfaces and its distribution by age and gender in clinic patients of Hawler Medical University/College of Dentistry: a retrospective cross-sectional study.

Erbil Dental Journal, 2023
Background and objectives: Dental caries is one of the most prevalent chronic diseases, which is caused by cariogenic oral bacteria. This study is aimed to realize the distribution of caries on individual permanent tooth surfaces, and compares these ...
Niaz Hamaghareeb Hamasaeed , Eman Kanabi Mohammed, Kazhin Mahmood Omer, Rayan Amir Bapir   +3 more
doaj  

Analysis of Frictional Effects on the Dynamic Response of Gear Systems and the Implications for Diagnostics [PDF]

, 2015
To develop accurate diagnostic techniques, this study examines gear dynamic responses based on a model including the frictional effect of tooth mesh process.
Gu, Fengshou, Brethee, Khaldoon F., Ball, Andrew, Fengshou Gu, Andrew D. Ball, Ball, Andrew D., Jingwei Gao, Gao, Jingwei, Khaldoon F. Brethee   +8 more
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