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| Liu,Lin; Li,Hongbo; Zhao,Tong; Gao,Yuxuan; Guo,Jing; Wang,Xiaoyu; Li,Xuesheng. |
| The objective of this study was to construct three-dimensional (3D) images of premolars to measure the length, surface area and volume of crown and root and to analyze the mathematical relation among crown-to-root ratios in terms of length, surface area and volume. Twenty-five premolars were scanned using micro-computed tomography (micro CT) in vitro to build 3D models. The long axis and enamelo-cemental junction of each tooth were determined with the help of Geomagic Studio software, and the length, surface and volume of crown and root were measured. The crown-to-root ratios in terms of length, surface and volume were calculated and the relationship among length, surface area and volume of crown and root as well their ratios were analyzed using SPSS... |
| Tipo: Journal article |
Palavras-chave: Bicuspid; Tooth crown; Tooth root. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000200009 |
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| Ferreira,Marília Alves; Hespanhol,Lucas Carneiro; Capote,Ticiana Sidorenko de Oliveira; Gonçalves,Marcela de Almeida; Campos,Juliana Álvares Duarte Bonini. |
| The purpose of this study was to assess the presence and the degree of expression of the molar tubercle according to sex, dentition and hemi-arches. Study casts of 126 patients were assessed, and those were under orthodontic treatment at the University of Franca, UNIFRAN; they were from both sexs, from 4 to 13 years old. The upper second primary molars and the upper first permanent molars, from both sides, were evaluated regarding the presence and the degree of expression of the molar tubercle. For an association study, the qui-square test was utilized. The concordance about the presence or absence of the molar tubercle according to dentition, hemi-arch and sex, was estimated by the Kappa Statistics. There was a sexual dimorphism concerning the... |
| Tipo: Journal article |
Palavras-chave: Molar; Tooth crown; Permanent dentition; Primary dentition. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000100017 |
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