Effects of the hardness and chemical composition in apical cementum on the occurrence of root resorption
| Project/Area Number |
16K20656
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Orthodontics/Pediatric dentistry
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| Research Institution | Nihon University |
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Principal Investigator |
SHIMIZU Mami 日本大学, 松戸歯学部, 助手(専任扱) (50732856)
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| Research Collaborator |
UMEZAWA Eriko
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 歯根吸収 / セメント質 / エナメル質 / ビッカース硬さ / 硬度 |
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| Outline of Final Research Achievements |
The purpose of this study was to investigate whether or not individual variation in the hardness and chemical composition of the cementum in the root apex affects the degree of root resorption.
Results: In pit formation assay, the resorbed area in the soft group showed a greater extent than the moderate and hard groups. A correlation was noted between the Vickers hardness and the resorbed area of the cementum in the root apex. The Ca/P ratio in the soft and moderate groups showed lower than the hard group. A correlation was noted between the Vickers hardness and the Ca/P ratio of the cementum in the root apex.
Conclusions: These results suggested that the hardness and Ca/P ratio of the cementum may be involved in the occurrence of root resorption caused by orthodontic forces.
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Report
(3 results)
Research Products
(29 results)
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[Journal Article] Individual Variations in the Hardness and Elastic Modulus of the Human Cementum2016
Author(s)
Yamaguchi M, Yao-Umezawa E, Tanimoto Y, Shimizu M, Kikuta J, Hikida T, Takahashi-Hikida M, Horihata S, Suzuki K, Kasai K.
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Journal Title
Journal of Hard Tissue Biology
Volume: 25
Issue: 4
Pages: 345-350
DOI
NAID
ISSN
1341-7649, 1880-828X
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Relationship between root resorption and apoptosis in cementum.2017
Author(s)
Yukari Minato, Masaru Yamaguchi, Mami Shimizu, Jun Kikuta, Takuji Hikida, Momoko Hikida, Masaaki Suemitsu, Kayo Kuyama, Kazutaka Kasai
Organizer
International Association for Dental Research（IADR）
Place of Presentation
Ｍｏｓｃｏｎｅ ｃｅｎｔｅｒ，San Francisco, Calif., USA
Year and Date
2017-03-22
Related Report
Int'l Joint Research
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[Presentation] Effect of nasal obstruction on the immune system2017
Author(s)
Yoshiki Murakami, Masaru Yamaguchi, Mami Shimizu, Jun Kikuta, Tomonori Sato, Yurie Horigome, Ryoki Kobayashi ,Kazutaka,Kasai
Organizer
International Association for Dental Research（IADR）
Place of Presentation
Ｍｏｓｃｏｎｅ ｃｅｎｔｅｒ，San Francisco, Calif., USA
Year and Date
2017-03-22
Related Report
Int'l Joint Research
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