JP7330097B2 - 硬化監視システム及び方法 - Google Patents
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Description
本明細書に記載されるシステム及び方法は、以下の例示的な非限定的実施形態のうちの1以上に記載され得る。
400nm~800nmの範囲内の1以上の波長における可視監視光を放射し、監視光は、重合性材料の重合を実効的に誘導しない最大放射波長(λmax-mon)を有する、監視光源と、
監視光が重合性材料によって拡散反射された後に400nm~800nmの範囲内の1以上の波長における監視光を検出するように構成された可視光検出器と、
可視光検出器に動作可能に連結されたコントローラと、を備え、このコントローラは、重合性材料が、選択された硬化度にいつ達するかを可視光検出器によって検出された拡散反射監視光の強度の選択された変化レートに少なくとも部分的に基づき、判定するように構成されている、システム。
重合性材料に、400nm~800nmの範囲内の1以上の波長の可視監視光を照射し、監視光が重合性材料の重合を実効的に誘導しない最大放射監視波長(λmax-mon)を有し、
400nm~800nmの範囲内の1以上の波長における、監視光が重合性材料によって拡散反射された後の監視光を検出すると共に、
重合性材料が、選択された硬化度にいつ達するかを検出された拡散反射監視光の強度の選択された変化レートに少なくとも部分的に基づき判定すること、
を含む、重合性材料の硬化度を監視する方法。
可視光検出器を用いて、拡散反射された監視光を検出すると共に、
可視光検出器からの出力に少なくとも部分的に基づいて硬化電磁放射線による重合性材料の照射を停止することと、
を更に含む、実施形態26又は27に記載の方法。
図10は、以下において説明されるデータを収集するために用いられる硬化監視システムを示す。別途指定のない限り、選択された重合性材料の円盤形のサンプル580を、金型として用いるブラックワッシャ582内に収容した。サンプル580の上部及び下部を平らにプレスした。
バーコル硬さの下部対上部(bottom to top)(B/T)比を用いてサンプルの硬化度を定義した。反射プローブ526及び光ガイド524から見て外方に面したサンプル580の表面において、下部のバーコル硬さを測定した。反射プローブ526及び光ガイド524に面したサンプル580の表面において、上部のバーコル硬さを測定した。
(下部の硬さ値)/(上部の硬さ値の算術平均)X100=B/T比
Filtek Supreme Ultra shade A2B(3M Oral Care,St.Paul,MN,USA)の形態の重合性材料のサンプルを、金型として用いるブラックワッシャ(McMaster-Carr,Elmhurst,IL、USA,part#98029A029)内に収容し、厚さ3mm及び直径7mmである円盤形のサンプルを準備した。サンプル及びワッシャを黒色プラスチック片上に配置した。最初は、硬化光(450nm)の露光時間を1秒に設定した。硬化光への露光後に、サンプルごとに上部及び下部のバーコル硬さを収集した。後続の時点に対してこの手順を繰り返し、露光時間ごとに新たなサンプルを調製した。
実施例2では、実施例1の625nm監視光LEDの代わりに530nm監視光LED(ThorLabs M530F1)を用いたことを除いて、実施例1において用いた同じプロセス、装置、及び材料を用いた。加えて、光検出器とともに用いるバンドパスフィルタを530nmバンドパスフィルタ(Thorlabs FB530-10バンドパス)に変更した。
実施例2では、実施例1の625nm監視光LEDの代わりに740nm監視光LED(ThorLabs M740F1)を用いたことを除いて、実施例1において用いた同じプロセス、装置、及び材料を用いた。加えて、光検出器とともに用いるバンドパスフィルタを740nmバンドパスフィルタ(Thorlabs FB740-10バンドパス)に変更した。
図10において説明された装置を実施例3の740nm赤色監視LED及び740nmバンドパスフィルタとともに用いた。サンプルの厚さが5mmであったことを除いて、実施例1~3の場合と同様に、Filtek Bulk Fill Posterior A2 shade(3M Oral Care,St.Paul,MN,USA)の形態の重合性材料の厚さ5mmのサンプルをブラックワッシャ(McMaster-Carr,Elmhurst,IL,USA,part#98099A029)内で調製した。サンプル及びワッシャを監視光の下で白色プラスチック片上に配置した。光検出器からの反射率のベースライン読み値を確立するために、監視光をおよそ5秒間点灯した。次に、実施例1~3の場合と同様にサンプルを450nm青色硬化光に様々な硬化時間にわたって露光した。同時に、監視光(740nm赤色)を用いてサンプルの硬化を監視した。450nm青色硬化光を消灯した後に、監視光によるおよそ5秒の引き続きの露光を用いて、光検出器からの硬化後のベースラインを確立した。試験ごとに3回測定を行い、3回の試験からのデータを平均した。
Concise Composite Universal Shade(3M Oral Care,St.Paul,MN,USAからの重合性歯科材料)の形態の2部分レドックス硬化型重合性材料のサンプルを等分に完全に混合し、得られた混合物を、金型として用いるブラックワッシャ(McMaster-Carr,Elmhurst,IL,USA,part#98029A029)内に収容し、厚さ3mm及び直径7mmである円盤形のサンプルを準備した。
監視光を用いず、光検出器に到達する光の波長を制限するためのバンドパスフィルタを用いなかったことを除いて、実施例1において用いたのと同じ装置及びサンプル材料を用いた。その結果、硬化プロセスの間に光検出器によって反射硬化光を検出した。
Claims (3)
- 重合性材料の硬化度を監視するためのシステムであって、
550nmよりも大きい1以上の波長における可視監視光を放射し、前記可視監視光が前記重合性材料の重合を誘導しない最大放射波長(λmax-mon)を有する、監視光源と、
前記可視監視光が前記重合性材料によって拡散反射された後に400nm~800nmの範囲内の1以上の波長における拡散反射監視光を検出するように構成された可視光検出器と、
前記可視光検出器に動作可能に連結されたコントローラと、を備え、前記コントローラは、前記重合性材料が、選択された硬化度にいつ達するかを前記可視光検出器によって検出された前記拡散反射監視光の強度の選択された変化レートに少なくとも部分的に基づき判定するように構成されている、システム。 - 前記システムは、前記重合性材料の硬化が誘導される最大放射硬化波長(λmax-cure)を有する硬化電磁放射線を放射するように構成された硬化電磁放射線源を更に備える、請求項1に記載のシステム。
- 前記コントローラが前記硬化電磁放射線源に動作可能に接続されており、前記コントローラは、前記重合性材料が前記選択された硬化度に達したと判定した後に、前記硬化電磁放射線源が前記硬化電磁放射線を放射するのを停止するように構成されている、請求項2に記載のシステム。
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