Fatigue and fracture behavior of radicular dentin substrate: prevention of tooth fracture
| Project/Area Number |
21791950
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Dental engineering/Regenerative dentistry
|
|---|
| Research Institution | Showa University |
|---|
Principal Investigator |
INOUE Toshiko 昭和大学, 歯学部, 研究補助員 (90398701)
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
|---|
| Keywords | 歯 / 歯質 / 象牙質 / 強度特性 / 疲労強さ / 引張強さ / 歯根 / 人歯 |
|---|
| Research Abstract |
The purpose of this study was to compare the fatigue and tensile strengths of radicular dentin. Dentin slabs were prepared along the radicular tooth and trimmed into dumbbell-shaped specimens. Subsequently, fatigue and tensile tests were performed. The staircase method was employed to determine fatigue strength and its standard deviation. Mean fatigue strength and tensile strength were 44.3 ± 5.0 and 84.4 ± 8.3 MPa, respectively. The fatigue strength of radicular dentin was only approximately one half of the tensile strength. Additionally, fracture surfaces were observed by scanning electron microscopy. In engineering materials, fatigue failures are often facilitated by cyclic crack extension, which is identified by a series of self-similar inflections on the fracture surface regarded as “striations”. We confirmed that striations spacing on fracture surfaces of radicular dentin ranged from approximately 3 to 10 μm.
|
Report
(4 results)
Research Products
(36 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] Analysis of aging in rat hard tissues2009
Author(s)
Kou K, Inoue T, Debari K, Nishimura F, Miyazaki T
Organizer
2nd Meeting of International Association for Dental Research Pan Asian Pacific Federation and the 1st Meeting of International Association for Dental Research Asia/Pacific Region
Place of Presentation
Wuhan, China
Year and Date
2009-09-24
Related Report
-
-
-
-
-
-
-
-
-
