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アブストラクト（22巻4号：神奈川歯学）
Japanese
| Title ： | ハンマ・マイク法による歯の動揺度測定に関する因子について |
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| Subtitle ： | 原著 |
| Authors ： | 本間秀文, 松尾悦郎 |
| Authors（kana） ： | |
| Organization ： | 神奈川歯科大学補綴学教室第1講座 |
| Journal ： | 神奈川歯学 |
| Volume ： | 22 |
| Number ： | 4 |
| Page ： | 585-603 |
| Year/Month ： | 1988 / 3 |
| Article ： | 原著 |
| Publisher ： | 神奈川歯科大学学会 |
| Abstract ： | 「緒言」歯周組織の健康状態を客観的に把握しようとする試みは古くから多数報告されている. これらの試みのうち, 被検歯にトランジューサを付着しないで歯の動揺度測定する非接触方式は, 測定操作の簡略な事や測定精度の高い事から実用性が高いと考えられている. さらにこの中でもインパクトハンマで歯を加振し, 歯の応答をインパクトハンマに付着したマイクロホンにより一波長の長さで表現する方法(以下ハンマ・マイク法)は臨床的にも応用が容易で, 成人100名の測定結果も報告されている. 臨床的に好結果をえているハンマ・マイク法も理論的背景, 即ち被検歯側の応答因子, マイクロホンの有効な理由ならびに一波長の意味づけなどについて, 未だ不明な部分も多い. 被検歯側の応答因子について平川らは歯の植立模型や乾燥頭蓋において, 歯槽骨の高さや人工歯根膜の厚さによって一波長の長さ(以下一波長)が変化し, 歯を支持する歯槽骨の低い方が, また人工歯根膜の厚い方が一波長が長くなる傾向を認め, これらが因子の一部である事を報告している. |
| Practice ： | 歯科学 |
| Keywords ： | 歯の動揺度, ハンマ・マイク法, 人工歯槽骨 |
English
| Title ： | The Factor to Relation of Measure Tooth Mobility by Hammer・microphone Method |
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| Subtitle ： | Original article |
| Authors ： | Hidefumi HOMMA, Etsuro Matsuo |
| Authors（kana） ： | |
| Organization ： | 1st department of Prosthetic Dentistry Kanagawa Dental College |
| Journal ： | Kanagawa Shigaku |
| Volume ： | 22 |
| Number ： | 4 |
| Page ： | 585-603 |
| Year/Month ： | 1988 / 3 |
| Article ： | Original article |
| Publisher ： | Kanagawa Odontological Society |
| Abstract ： | Abstract : Experiments conducted at this laboratory have made use of an impact hammer to measure tooth mobility in a time domain. A method using a microphone attached to the top of hammer to record the length of one wave form the onset of impact has increased in adaptability to clinical use. Nevertheless, there are many points which remain unclear concerning the theretical backgroung to the length of one wave form. The following experiment was carried out in order to clarify these matters, as much as possible. Experimental materials were created which consiste of an artificial tooth with artificial periodontium and an artificial jaw. These materials were used with an acceleration pick-up attached to the artificial tooth and a microphone on the top of an impact hammer which acted as transducers to permit analysis of time singnals obtained with a BK 2 ch FFT analyzer. In addition, a laser doppler vibrometer (LDV) was used for modal analysis. Results : 1. Regarding deficits in the alveolar wall corresponding to the tooth root, the effect due to depth was greater than that due to width. 2. It proved difficuld to get an adequate grasp on the state of health for the periodontal tissues, by means of vertical impact when an acceletion piuk-up was attached to the experimental tooth. 3. Results of modal analysis showed almost no relative displacement for either the tooth itself or the alveolar bone itself, but did show tooth displacement in relation to the alveolar bone. 4. Results of measurement with the Hammer-Microphone Method lead the authors to assume that that response is mainly in terms of the synthetic stiffness of the hammer and the periodontium. 5. This response appeared as results in this experiment mainly in the form of tooth displacement. This was influenced by the periodontal tissue in particular the thickness of the periodontium, showing that there are longer lengths of one wave form in response to greater thickness. |
| Practice ： | Dentistry |
| Keywords ： |
