Results 1 to 10 of about 39,673 (219)
BMC Oral Health, 2023 Aim To evaluate the effects of root canal treatment (RCT) and post-crown restoration on stress distribution in teeth with periapical bone defects using finite element analysis.
ShuoMin Chen +15 more
doaj +1 more source
Journal of Engineering, 2022 Shipboard helicopter folding technology can increase the number of helicopters parked on board aircraft carriers. Crown gear coupling is the trend in helicopter tail rotor folding technology due to its ability to automatically and quickly engage and ...
Miaomiao Li +4 more
doaj +1 more source
Galician Medical Journal, 2016 The selection of an optimal treatment is one of the problems when restoring the defects of dental hard tissues after endodontic treatment. The work aims at studying the percentage ratio of the volume of the coronal portion of the tooth to its crown that ...
Olena Bulbuk, Mykola Rozhko
doaj +1 more source
Orthodontic Journal of Nepal, 2020 Introduction: Anterior tooth fracture is the most commonly presenting clinical condition during routine dental practise. Restoration of such tooth is challenging task due to fracture position and amount of remaining coronal tooth structure.
Shyam Kaji Maharjan +3 more
doaj +1 more source
Journal of Dental Sciences, 2021 A digital technique for designing and fabricating an individual tooth tray used for taking subgingival impression of complete crown preparation was described. The digital model of required dentition region was obtained before performing crown preparation.
Xiaoxiang Xu +4 more
doaj +1 more source
Manufacturing and measuring investigation of crown worm tooth surface
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2015 The crown worm drive is a new type of worm drive, it is consisting of an internal gear and a crown worm generating by the internal gear surface, and it is characterized with small size yet high-loading capacity.
Yonghong CHEN +3 more
doaj +1 more source
Overview of Crown Gear Coupling Contact Theory
Jixie chuandong, 2023 Due to special tooth surface morphology, the crown gear coupling achieves misalignment compensation while causing the non-uniform carrying of tooth pairs, which destroys the stability of the tooth surface contact. Scholars at home and abroad have carried
Guan Yongqiang +3 more
doaj
Idiopathic internal resorption: Report of a case with unusual features
Journal of Orofacial Sciences, 2012 Tooth resorption can occur from the internal surface of a tooth or from the external surface of a tooth. Internal resorption is commonly termed to be "idiopathic" because of unknown cause.
Santosh Hunasgi +3 more
doaj +1 more source
American Black-White Differences in Primary Tooth Crown Shape: The Crown Index
Dental Anthropology, 2010 The purpose of this tooth-size study was to compare the crown index—the ratio of buccolingal to mesiodistal crown size—in the primary teeth of contemporary American blacks and whites.
Edward F. Harris, Betsy D. Barcroft
doaj +1 more source
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2019 To avoid the occurrence of the hub tooth tip edge contact with the sleeve tooth root flank and the sleeve tooth tip edge contact with the hub tooth root flank, a novel crown gear coupling composed of a hub with profile crowning, longitude crowning, and ...
Yabin GUAN, Xiaohui YANG, Zongde FANG
doaj +1 more source