歯肉溝液を用いた歯周病の検査。静電容量と臨床所見との相関

[Examination of periodontal disease with gingival crevicular fluid. Correlation between capacitance and clinical findings].

抄録

歯肉の炎症状態と歯肉隙間液（GCF）の量には密接な関係があることが知られている。GCF量の測定には、従来ろ紙が用いられてきた。本研究では、歯肉溝に挿入可能なセンサーを有する静電容量測定装置を作製した。歯周炎患者を対象にGCFの静電容量を測定し、以下の結果を得た。1.測定装置はパソコンで制御し、0.1秒ごとにデータを取得した。測定部位のGIが増加するにつれて高い値が得られ、測定値の増加傾向は長く持続した。2.2.測定値の安定性を考慮すると、GCF量は10秒後の値で表すのが最適と思われた。3.静電容量と臨床所見との相関を500部位で評価した。GIで最も相関が高く、次いでP1I、GBI、PDの順であったことから、歯肉の初期炎症の検出に本法が有用であることが示唆された。

An intimate relationship between the inflammatory state of the gingiva and the amount of gingival crevicular fluid (GCF) is well known. For the measurement of the volume of GCF, filter paper has been used in the past. In the present study, an electrostatic capacity measuring apparatus with sensor that is insertable into gingival sulcus was fabricated. Capacitance of GCF was measured in patients with periodontitis and the following results were obtained. 1. The measuring apparatus was controlled by a personal computer to obtain the data every 0.1 second. As the GI increased at the site of measurement, higher values were obtained, with longer persistence of the trend of increase in the measured value. 2. In view of the stability of the measured values, the amount of GCF appeared to be best expressed as the value obtained after 10 seconds. 3. The correlation between the capacitance and the clinical findings was evaluated at 500 sites. The correlation was the highest in GI followed by P1I, GBI and PD, suggesting the utility of this method in the detection of initial gingival inflammation.