| Project/Area Number |
10041193
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B).
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Surgical dentistry
|
|---|
| Research Institution | YAMANASHI MEDICAL UNIVERSITY |
|---|
Principal Investigator |
OHNISHI Masatoshi YAMANASHI MEDICAL UNIVERSITY, DEPARTMENT OF ORAL & MAXILLOFACIAL SURGERY, PROFESSOR, 医学部, 教授 (50014139)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HONDA Takeshi Fukuoka Dental College, Professor, 歯学部, 教授 (60099067)
ディエス D. ホンデュラス国立自治大学, 歯学部, 助手
バラオナ J.F. ホンデュラス国立自治大学, 歯学部, 教授
|
|---|
| Project Period (FY) |
1998 – 1999
|
| Project Status |
Completed (Fiscal Year 1999)
|
| Budget Amount *help |
¥6,500,000 (Direct Cost: ¥6,500,000)
Fiscal Year 1999: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1998: ¥3,500,000 (Direct Cost: ¥3,500,000)
|
|---|
| Keywords | Epidemiological Survey / Temporomandibular Disorders / Dental Attrition / Morphological Change of Condyle / Central America / Native Indian / Eating Habits / Adaptation / 顎関節症の発症誘因 / ホンデュラス、ヒカケ族 |
|---|
| Research Abstract |
The present study consists of two objectives: an epidemiological study of the incidence of temporomandibular symptoms(TMS) and an investigation to clarify the relationship between the dental attrition and morphological change of condyle using dried cranial bone samples.
In order to conduct the survey, we selected a population consisting mainly of the native inhabitants of Honduras and Guatemala in Central America, who have the same radical roots as the Japanese and whose living environment, especially eating habits, are different from those of Japanese. As for the latter investigation, we collected data on native indians in Central America.
Results: The ranking of incidence of TMS, from lowest to highest, was a Honduran native indians, living in the mountain[31.7%(20/63)], Guatemalan native indian[42.1% (43/02)], a Honduran native Indian on the Coasu of the Caribbean Sea[46.8%(74/58)] and the citizens of Tegucigalpa, the capital of Honduras[50.0%(26/52)].
Attrition Broca(B)was used to evalvate the degree to attrition and all patients with TMS were classified as either class 1 or class 2.
Regarding the relationship between dental attrition and the morphological change of mandibular condyle, the B1-B3 mild attrition group was classified as convex type, while the B2-B4 group was classified as fiat type. The present study demonstrated that the number of cases of fiat type increased as attrition progressed from a mild to severe degree.
Discussion: The results obtained in this study suggested that the patients with TMS were in a state of poor adaptability character; zed by mild attrition and slight remodeling of the mandibular condyle.
|
