A study on occlusion and periodontium using high precision displacement detector
Grant-in-Aid for Scientific Research (A)
|Allocation Type||Single-year Grants |
|Research Institution||The University of Tokushima |
BANDO Eiichi The University of Tokushima, School of Dentistry, Professor, 歯学部, 教授 (00014168)
SUZUKI Atsushi The University of Tokushima, School of Dentistry, Research Associate, 歯学部, 助手 (80196790)
IKEDA Takashi The University of Tokushima, School of Dentistry, Assistant Professor, 歯学部・附属病院, 講師 (30193204)
NAKANO Masanori The University of Tokushima, School of Dentistry, Associate Professor, 歯学部, 助教授 (30136262)
TAKEUCHI Hisahiro The University of Tokushima, School of Dentistry, Research Associate, 歯学部, 助手 (10222093)
NISHIGAWA Keisuke The University of Tokushima, School of Dentistry, Research Associate, 歯学部, 助手 (10202235)
細木 真紀 徳島大学, 歯学部附属病院, 助手 (10228421)
近藤 宏治 徳島大学, 歯学部・附属病院, 助手 (90263855)
|Project Period (FY)
1996 – 1999
Completed (Fiscal Year 1999)
|Budget Amount *help
¥20,300,000 (Direct Cost: ¥20,300,000)
Fiscal Year 1999: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1998: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1997: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1996: ¥9,500,000 (Direct Cost: ¥9,500,000)
|Keywords||six degrees of freedom / magnetic fields / tooth movement / jaw movement / tooth deformation / high-resolution motion detector in six degrees of freedom / 高精度変位計測器 / 咬合力 / 磁気位相空間 / 6自由度顎運動|
We developed four different types of motion detector to study occlusion and periodontal tissue properties. These motion detector utilizes magnetic field and measure movement in six degrees of freedom.
The first motion detector consisted in six square coils 1800 mm on a side. The accuracy of the measurement is the level of 10μm at the central area of cubic magnetic field. Since this device possesses large magnetic field that surround whole human body, the system can be applied for the measurement of the jaw movement during nocturnal bruxsim.
The second motion detector used magnetic alloy for the core of the primary coils. Since this device has relatively small size, the system can handle easily and may used in daily dental clinic.
The third motion detector possess higher accuracy that enable to measure slight tooth movement during occlusion. This device consisted in six round coils 1000mm in diameter and the accuracy of the measurement is the level of 1.3 μm for translation and 0.00017 degrees for rotation at the central area of magnetic field. The simultaneous measurement of right side upper first premolar and jaw movement was performed with this device. Occlusal contacts were very influential for tooth movement and the rotation centers of the tooth movement were found near teeth in some cases.
The last motion detector measures movement in one degree of freedom but possesses extremely high accuracy that enable to evaluate tooth deformation with occlusal force. Vertical length of buccal surface of upper canine and first premolar was measured with this device. Buccal surfaces of these teeth were shortened with buccal cusp loading and expanded with palatal cusp loading.
Report (5 results)
Research Products (22 results)