| Project/Area Number |
10557185
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Fukuoka Dental College |
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Principal Investigator |
SATO Hironobu Fukuoka Dental College, Dept. of Prosthodontics, Professor], 歯学部, 教授 (00145955)
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| Co-Investigator(Kenkyū-buntansha) |
KANDA Shigenobu Kyushu University, School of Dentistry Dept. of Oral Radiology, Professor, 歯学部, 教授 (20014003)
HISAMA Kazuhiro Fukuoka Dental College, Dept. of Prosthodontics, Reseach Associate, 歯学部, 助手 (00218710)
UKON Shinichi Fukuoka Dental College, Dept. of Prosthodontics, Associate Professor, 歯学部, 助教授 (70038876)
OHKI Masafumi Kyushu University. School of Health Science, Dept. of General Education Professor, 医療技術短期大学部, 教授 (10160441)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 1999: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1998: ¥4,200,000 (Direct Cost: ¥4,200,000)
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| Keywords | occlusal treatment / TMD / condyle position / radiographs / TMJ / tomograms / digital subtraction / サブトラクション / 顎関節 / デジタル / 顎関節症 |
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| Research Abstract |
To achieve good occlusal treatment results in patients with temporomandibular disorders (TMD), evaluation of the condyle position on the radiographs of temporomandibular joint (TMJ) is one of the important factor. Therefore, purpose of this study is to develop a method for quantifying positional change of the condyle on lateral TMJ tomograms by use of digital subtraction. This method permits rotational and translational changes of condylar reference points for easy measurement. Accuracy was evaluated in vitro using the two TMJs of two dry human skulls and in vivo with seven volunteers. The average absolute error of the angle of rotation in vitro was 0.67 degrees. For the anterior-posterior element of translation the average absolute error was 0.07mm, and for the superior-inferior element of translation it was 0.06mm. From these results, we could conclude that this method provides clinically acceptable measurement accuracy. To verify the usefulness of the method, one clinical case and l6 volunteers with were experimental bite conditions used. An easy and accurate recording system of occlusal position were also developed.
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