Individual Variations in the Hardness and Elastic Modulus of the Human Cementum
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- Yamaguchi Masaru
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo
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- Yao-Umezawa Eriko
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo
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- Tanimoto Yasuhiro
- Department of Dental Biomaterials, Nihon University School of Dentistry at Matsudo
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- Shimizu Mami
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo
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- Kikuta Jun
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo
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- Hikida Takuji
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo
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- Takahashi-Hikida Momoko
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo
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- Horihata Satoshi
- Department of Mathematical Science, Nihon University School of Dentistry at Matsudo
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- Suzuki Kunihiro
- Department of Biology, Nihon University School of Dentistry at Matsudo
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- Kasai Kazutaka
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo
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Abstract
The purpose of this study was to measure the physical properties of enamel and cementum of permanent teeth and to determine the correlation between them. This study was conducted on 50 maxillary premolars that were collected from 26 orthodontic patients (10 males and 21 females, mean age: 19.51 years, range: 12-35 years). The hardness and elastic modulus of the enamel and cementum were measured at the surface of the crown and root at three locations (cervical third: CC, middle third: CM, and apical third: CA). There were individual differences in the hardness and elastic modulus of enamel and cementum. The hardness of the cementum decreased from the cervical to apical regions on the root surfaces in the moderate and soft groups (p<0.01). Individual variations were observed in the hardness and elastic modulus of the human first premolar cementum. A correlation was noted between the hardness and elastic modulus of the enamel and cementum in the CA group (hardness: r=0.551, p<0.01, elastic modulus: r=0.552, P<0.01). These results suggested that the physical properties of cementum may be involved in the occurrence of root resorption caused by orthodontic forces.
Journal
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- Journal of Hard Tissue Biology
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Journal of Hard Tissue Biology 25 (4), 345-350, 2016
THE SOCIETY FOR HARD TISSUE REGENERATIVE BIOLOGY
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Keywords
Details 詳細情報について
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- CRID
- 1390282679434918144
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- NII Article ID
- 130005249139
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- NII Book ID
- AA11074332
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- ISSN
- 1880828X
- 13417649
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- NDL BIB ID
- 027698826
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed