| Project/Area Number |
60440090
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
補綴理工系歯学
|
|---|
| Research Institution | Tokyo Medical and Dental University |
|---|
Principal Investigator |
NAGAO Masanori Faculty of Dentistry, Tokyo Medical and Dental University, 歯学部, 教授 (60014213)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Ken'ichi Faculty of Dentistry, Tokyo Medical and Dental University, 歯学部, 助手 (00170316)
|
|---|
| Project Period (FY) |
1985 – 1987
|
| Project Status |
Completed (Fiscal Year 1987)
|
| Budget Amount *help |
¥21,300,000 (Direct Cost: ¥21,300,000)
Fiscal Year 1987: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1986: ¥18,500,000 (Direct Cost: ¥18,500,000)
Fiscal Year 1985: ¥2,500,000 (Direct Cost: ¥2,500,000)
|
|---|
| Keywords | Occlusal contact / Telemetry / Complete denture / 義歯の咬合 |
|---|
| Research Abstract |
The purpose of this study was to develop a telemetry system and to analyze the occlusal contacts of complete denture during mastication.
The telemetry system consisted of a transmitter unit with battery and a receiver unit. The transmitter allowed 6 channels of information of the occlusal contacts to be telementered by time division multiplex communication method within the approximate distance 2m.
The occlusal surface of the upper complete denture was made of metal and that of the lower denture was made of metal contact plates of 0.5 mm in width each space of 0.5 mm. The the transmitter was embedded in the lower denture. Occlusal contacts of 66 aged edentulous male were invesigated both on the chewing side and on the nonchewing side in the premolar, the 1st molar and the 2nd molar regions.
The results were as followed :
1. The occlusal contacts in the nonchewing side preceded those in the chewing side, with higher frequency and longer durtion.
2. In the nonchewing side, the occlusal contact of the premplar region occurred at different time ; the occlusal contact was observed first in the 2nd molar, then 32-48 ms later in the 1st molar, and 2-48 ms later in the premolar regions.
3. It is suggested that the balancing contact should be considered for stabilizing the complete denture in masication.
|
