Results 51 to 60 of about 76,223 (261)

3D Printing Helps Preserve Dental Pulp In Tooth Transplantation

open access: yesInternational Dental Journal
Introduction: This study presents a 3D Printing-Aidded surgical approach to preparing the receiving socket for a mature mandibular third molar donor tooth and try to preserve dental pulp. Case description: A 29-year-old woman developed root resorption of
Qianshu Lv, Jinguo Zheng
doaj   +1 more source

Antagonistic interaction between Ezh2 and Arid1a coordinates root patterning and development via Cdkn2a in mouse molars

open access: yeseLife, 2019
Patterning is a critical step during organogenesis and is closely associated with the physiological function of organs. Tooth root shapes are finely tuned to provide precise occlusal support to facilitate the function of each tooth type.
Junjun Jing   +9 more
doaj   +1 more source

Tooth row allometry in domestic rabbits and nondomestic lagomorphs: Evidence for a decoupling of body and tooth row size changes in evolutionary time

open access: yesThe Anatomical Record, EarlyView.
Domestic rabbits of different body sizes differ disproportionately in the length of their tooth row or the length of their diastema. Abstract In various domestic mammals, smaller breeds tend to have proportionally larger teeth, whereas this is not a universal trend across mammals.
Ursina L. Fasciati   +3 more
wiley   +1 more source

渐开线齿轮齿根过渡曲线最佳线型实现方法

open access: yesJixie chuandong, 2013
Based on finite element optimization analysis principle and using of characteristics of NURBS spline curve,through the shape optimization of standard involute gear tooth root part operated in Pro/E and ANSYS workbench software,a new realization method of
董新华, 马勇, 柳强
doaj  

Origin, evolution and biogeographic dynamics of the European rabbit (Oryctolagus cuniculus) in Southwestern Europe

open access: yesThe Anatomical Record, EarlyView.
Abstract The Pleistocene is a key period for understanding the evolutionary history and palaeobiogeography of the European rabbit (Oryctolagus cuniculus). The species was first documented in southeastern Iberia at the beginning of the Middle Pleistocene and appears to have rapidly spread throughout Southwestern Europe, where it was found in numerous ...
Maxime Pelletier
wiley   +1 more source

Accurate Finite Element Modeling Method of Herringbone Gear based on Multipoint Constraint Method

open access: yesJixie chuandong, 2022
A sufficiently refined mesh at the stress position is the basis for finite element analysis of gears to obtain accurate tooth surface contact stress and tooth root bending stress.
Guanwang Geng, Wei Liu, Qingsong Zhang
doaj  

Functional anatomy, jaw mechanisms, and feeding behavior of Dunkleosteus terrelli (Placodermi, Arthrodira)

open access: yesThe Anatomical Record, EarlyView.
A new musculoskeletal reconstruction and revision of the cranio‐mandibular anatomy of the Devonian arthrodire placoderm Dunkleosteus terrelli from a comparative and functional anatomical perspective. Dunkleosteus is a specialized arthrodire with many specializations for feeding on large vertebrates, and many of its features are part of broader ...
Russell K. Engelman   +4 more
wiley   +1 more source

Biomechanical Analysis Of Maxillary Posterior Tooth Intrusion By Clear Aligners

open access: yesInternational Dental Journal
Aim or purpose: To analyze the stress concentration region and tooth displacement in maxillary posterior tooth intrusion by clear aligners. Materials and methods: A finite element model of maxillary dentition, periodontal ligaments, and clear aligners ...
Houwen Pan, Lingyong Jiang
doaj   +1 more source

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

open access: yesThe Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

Micro-CT study of the influence of orthodontic force on the root resorption and orthodontic tooth movement

open access: yes口腔疾病防治, 2016
Objective To analyze the tooth movement distance and root resorption in rats under different orthodontic forces, to explore the effect of orthodontic force on the root resorption during orthodontic tooth movement.Methods 64 male Sprague Dawley (SD) rats ...
WU Chang-jing
doaj   +1 more source

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