Photoplethysmographic Diagnosis for Marginal Periodontitis

边缘性牙周炎的光电体积描记诊断

• 批准号: 62870075
• 负责人: HORIUCHI Hiroshi
• 金额: $ 3.97万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62870075/
• 关键词: Photoplethysmograph; Gingival Blood Flow; Marginal Periodontitis

Gingival inflammation accompanies disorder of local circulation. Therefore there exists a possibility for detecting inflammatory condition by observing gingival blood flow. The purpose of this study is to establish a method to record the photoplethysmographs from small gingival areas and to estimate gingival inflammatory stages by comparing the wave forms with those from normal area.Preliminary investigations were carried out to determine conditions for recording. A tungsten lamp connected to a stabilized power supply was used as the light source. A fiber optic bundle of 2 mm diameter was fixed to the adjacent tooth using an acrylic adapter. The bundle consisted of illuminating and recording fibers which were arranged randomly. A CdSe photoconductive cell was used as the photosensor. Simultaneous recording of the ECG was made and the recorded QRS spikes were used as the triggers for averaging the record. To record transilluminated plethysmographs, the outlet of the illuminating bundle was arranged lingually. In case of reflected photoplethysmographs, both the recording and illuminating fibers were placed tabially.When the bundle was placed close to the gingiva, dicrotic notches were cleatly observed both on transilluminated and reflected plethysmographs. Covering the surface of gingiva with white opaque paint resulted almost the same wave forms as transilluminated ones in reflected photoplethysmographs. To reject the 100 Hz noise from fluorescent lights at clinic, a sheet of aluminum foil was used around the recording site.Experiments were in progress to analyze the characteristics of photoplethysmographs recorded from inglamed gingiva and to relate the findings to other periodontal diagnostic parameters.The photoplethysmographs recorded from patients with marginal perjodontitis were smaller amplitude with less clear dicrotic notches than those recorded from normal gingiva.

牙龈发炎伴有局部循环障碍。因此，有可能通过观察牙龈血流来检测炎症状况。本研究的目的是建立一种记录牙龈小区域光体积描记图的方法，并通过与正常区域光体积描记图的波形比较来判断牙龈炎症的程度，并对记录条件进行了初步的探讨。使用连接到稳定电源的钨灯作为光源。使用丙烯酸适配器将直径为2 mm的光纤束固定到相邻牙齿。光纤束由随机排列的照明光纤和记录光纤组成。使用CdSe光电导电池作为光传感器。同时记录ECG，并将记录的QRS尖峰用作平均记录的触发器。为了记录透照体积描记图，照明束的出口被布置成舌向。在反射式光电容积描记器中，记录纤维和照明纤维都被放置在平板上，当束被放置在牙龈附近时，在透射式和反射式容积描记器上都可以清楚地观察到重搏切迹。用白色不透明涂料覆盖牙龈表面，在反射光体积描记图中产生与透照光几乎相同的波形。为了抑制临床荧光灯的100 Hz噪声，实验结果表明，龈缘炎患者的光体积描记图振幅较正常人小，重搏切迹较不清晰，而龈缘炎患者的光体积描记图振幅较正常人小，重搏切迹较不清晰，龈缘炎患者的光体积描记图振幅较正常人小，重搏切迹较不清晰，而重搏切迹较不清晰，牙龈

项目成果

井川資英,八巻恵子,鈴木敬子,大沼美和子,堀内博: "ヒト歯肉微小領域より得られる光電脈波" 日本歯周病学会会誌. 32. 205-212 (1990)

Motohide Ikawa、Keiko Yamaki、Keiko Suzuki、Miwako Onuma、Hiroshi Horiuchi：“从人体牙龈微区域获得的光电容积描记图”日本牙周病学会杂志 32. 205-212 (1990)。

井川資英、八巻恵子、鈴木敬子、大沼美和子、堀内博: "ヒト歯肉微小領域より得られる光電脈波" 日本歯周病学会会誌. 32. 205-212 (1990)

Motohide Ikawa、Keiko Hamaki、Keiko Suzuki、Miwako Onuma、Hiroshi Horiuchi：“从人类牙龈显微区域获得的光电容积描记图”日本牙周病学会杂志 32. 205-212 (1990)。

Motohide IKAWA, Keiko YAMAKI, Noriko SUZUKI, Miwako OONUMA and Hiroshi HORIUCHI: "Photoplethysmograph Obtained from a Small Area of Human Gingiva" J. Japan. Ass. Periodont. vol.32 no.1 205-212.

Motohide IKAWA、Keiko YAMAKI、Noriko SUZUKI、Miwako OONUMA 和 Hiroshi HORIUCHI：“从人类牙龈小区域获得的光电体积描记器”J. Japan。