JP4038229B2 - 露髄診断キットおよびプローブ・シリンジ - Google Patents
露髄診断キットおよびプローブ・シリンジ Download PDFInfo
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- JP4038229B2 JP4038229B2 JP2006534995A JP2006534995A JP4038229B2 JP 4038229 B2 JP4038229 B2 JP 4038229B2 JP 2006534995 A JP2006534995 A JP 2006534995A JP 2006534995 A JP2006534995 A JP 2006534995A JP 4038229 B2 JP4038229 B2 JP 4038229B2
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- probe
- syringe
- conductive paste
- ion conductive
- discharge
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/04—Measuring instruments specially adapted for dentistry
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- Biophysics (AREA)
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- Dentistry (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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Description
富田昭夫、「電気抵抗値による歯髄炎の鑑別診断の研究、口病誌、第29巻、304〜319頁、1962年 林良子他、「電気抵抗値による乳歯の歯髄診断とその予後に関する臨床的観察」、小児歯科学雑誌、第31巻第2号、第290〜295頁、1982年
前記プローブ・シリンジは、柔軟な中空材料で形成された吐出部と、前記吐出部に連続しイオン導電性ペーストを収容する円筒部と、該円筒部に圧入されるピストンと、前記プローブ・シリンジの内部と外部とを接続させる導電部材とから構成され、
前記電流検出装置は、前記イオン導電性ペーストを含んで構成される前記閉回路を流れる電流から回路抵抗またはインピーダンスを取得する、露髄診断キットが提供できる。
本発明によれば、露髄を診断するために使用されるプローブ・シリンジであって、前記プローブ・シリンジは、
柔軟な中空材料で形成された吐出部と、
前記吐出部に連続しイオン導電性ペーストを収容する円筒部と、該円筒部に圧入されるピストンと、
前記プローブ・シリンジの内部と外部とを接続させる導電部材とから構成され、前記導電部材は、前記イオン導電性ペーストを通して電流を流すことにより、前記イオン導電性ペーストを含む導電回路を形成させることにより露髄診断プローブとされる、プローブ・シリンジが提供される。
図8には、本発明のシミュレーション実験に使用した示した露髄診断キットの構成を示す。図8に示すプローブ・シリンジには、イオン導電性ペーストとして市販の練歯磨き(ポリマーとして、カルボキシメチルセルロースナトリウムを含有する。)を生理食塩水で、プローブ・シリンジから吐出できる程度の流動性が得られるように、概ね粘度を、0.1〜0.2Pa・sとなるように希釈した。このようにして得られたイオン導電性ペーストをプローブ・シリンジに充填して、プローブ・シリンジを作成した。
実験1と同様に露髄検査キットを使用し、生理食塩水で浸さない脱脂綿を使用して、同様の実験を行ったところ、検針は、当初高インピーダンスを示す位置に振れていたが、イオン導電性ペーストの水分が脱脂綿に浸透し、カーボン抵抗のリード線に接触するようになると徐々に低インピーダンスに対応する位置まで振れることが確認された。すなわち、患歯表面から歯髄にまで至る齲蝕部の程度に応答したインピーダンス値が得られることが示された。
Claims (7)
- 露髄を診断するための露髄診断キットであって、前記キットは、露髄診断プローブとして使用されるプローブ・シリンジと、プローブ・シリンジを含む電気的閉回路を流れる電流から、回路抵抗またはインピーダンスを得るための電流検出装置とを含んでおり、
前記プローブ・シリンジは、
円筒部の先端に配置され、イオン導電性ペーストの導電経路を齲窩と導電部材との間を非接触の状態として形成する吐出部と、
前記吐出部に連続し、水性分散体であり、0.1Pa・s〜20Pa・sの範囲の粘度を有する水性分散体であるイオン導電性ペーストを収容する円筒部と、該円筒部に圧入されるピストンと、
前記プローブ・シリンジの内部と外部との導通を確保する導電部材とから構成され、
前記電流検出装置は、前記イオン導電性ペーストのチクソトロピー性により患歯上に厚さのあるイオン導電性ペースト層を介して構成される前記閉回路を流れる電流から回路抵抗またはインピーダンスを取得する、露髄診断キット。 - 前記吐出部は、中空のシリコーンゴムにより形成され、前記導電部材は、前記吐出部を横断して配設される、請求項1に記載の露髄診断キット。
- 前記イオン導電性ペーストは、プロピレングリコール、ポリビニルアルコール、ヒドロキシエチルセルロース、ゼラチン、ポリアクリル酸、カルボキシメチルセルロース、ポリアクリル酸ナトリウム、カルボキシメチルセルロースナトリウムを含む群から選択されるイオン導電性物質を含有する、請求項1に記載の露髄診断キット。
- 露髄を診断するために使用されるプローブ・シリンジであって、前記プローブ・シリンジは、
円筒部の先端に配置され、イオン導電性ペーストの導電経路を齲窩と導電部材との間を非接触の状態として形成する吐出部と、
前記吐出部に連続し、水性分散体であり、0.1Pa・s〜20Pa・sの範囲の粘度を有するイオン導電性ペーストを収容する円筒部と、該円筒部に圧入されるピストンと、
前記プローブ・シリンジの内部と外部との導通を確保する導電部材と
から構成され、前記導電部材は、前記イオン導電性ペーストのチクソトロピー性により患歯上に厚さのあるイオン導電性ペースト層を介して電流を流すことにより、前記イオン導電性ペーストを含む導電回路を形成させ、露髄診断を行うプローブとされる、プローブ・シリンジ。 - 前記吐出部は、中空のシリコーンゴムにより形成され、前記導電部材は、前記吐出部を横断して配設される、請求項4に記載のプローブ・シリンジ。
- 前記イオン導電性ペーストは、プロピレングリコール、ポリビニルアルコール、ヒドロキシエチルセルロース、ゼラチン、ポリアクリル酸、カルボキシメチルセルロース、ポリアクリル酸ナトリウム、カルボキシメチルセルロースナトリウムを含む群から選択されるイオン導電性物質を含有する、請求項4に記載のプローブ・シリンジ。
- 前記イオン導電性ペーストは、0.1Pa・s〜5Pa・sの範囲の粘度とされる、請求項6に記載のプローブ・シリンジ。
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