Recurrent food trapping after an implant, or floss that will not pass? Look for the cause in crown contour, the contact point and cleaning blind spots｜證據鏈

FAQ

Does food trapping after an implant mean that the crown was made badly?

Not necessarily, and in most cases it does not. A review described the causes of open contacts as multifactorial, including **biomechanical disparity, prosthetic and surgical factors, dynamic changes in occlusal forces, and movement of natural teeth** [F5]. The core mechanism is that an osseointegrated implant remains fixed, while the adjacent natural teeth continue to move slowly throughout life; being side by side over time creates a discrepancy. A systematic review and meta-analysis of 15 studies reported a mesial contact-loss rate of **44.2% (95% CI 30.6% to 58.6%)** [F1]. Such a high prevalence indicates that this is a common development in implant prosthodontics, not a manufacturing defect confined to an individual case.

インプラント治療後に食べ物が詰まるのは、クラウンの作りが悪いということですか？ — 必ずしもそうではなく、多くの場合は違います。あるレビューでは、オープンコンタクトの原因を多因子性のものとして整理し、**生体力学的な差、補綴・外科的要因、咬合力の動的変化、天然歯の移動**を挙げています [F5]。中心的な機序は、オッセオインテグレーションが完成したインプラントは固定されて動かない一方、隣接する天然歯は生涯を通じてゆっくり動き続けるため、長期間並ぶことでずれが生じるというものです。 15件の研究を組み入れたシステマティックレビューとメタアナリシスでは、近心のコンタクトロス率は**44.2%（95% CI 30.6%〜 58.6%）**に達しました [F1]。これほど有病率が高いことから、これは単一症例の製作上の欠陥ではなく、インプラント補綴でよくみられる経時的変化であることが分かります。

Does food trapping after an implant mean that the crown was made badly? — Not necessarily, and in most cases it does not. A review described the causes of open contacts as multifactorial, including **biomechanical disparity, prosthetic and surgical factors, dynamic changes in occlusal forces, and movement of natural teeth** [F5]. The core mechanism is that an osseointegrated implant remains fixed, while the adjacent natural teeth continue to move slowly throughout life; being side by side over time creates a discrepancy. A systematic review and meta-analysis of 15 studies reported a mesial contact-loss rate of **44.2% (95% CI 30.6% to 58.6%)** [F1]. Such a high prevalence indicates that this is a common development in implant prosthodontics, not a manufacturing defect confined to an individual case.