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Why Do Fillings Come Out? When It Keeps Happening, Simply Sticking It Back Is Not the Answer｜證據鏈
When the filling in the same tooth comes out a second and a third time, most people's first thought is: "Was the bonding not done well?" or "Should we change to a better material?" The answer in the literature differs from both of those intuitions. A systematic review and meta-analysis of complex (two or more surfaces) direct posterior restorations recorded that for resin composite restorations the commonest causes of failure were secondary caries, restoration fracture and tooth fracture; for amalgam restorations they were secondary caries and tooth fracture. That abstract lists these causes without reporting any ranking; a separate review comparing the long-term performance of amalgam and resin composite states explicitly that secondary caries was the most common cause of composite failure. In other words, the cause recorded most often is not "it will not stay stuck" but decay recurring underneath the margin of the restoration. The assumption that "a more advanced material will solve it" has been tested too. A systematic review and meta-analysis of 10 randomised controlled trials found that, compared with conventional resin composite, bioactive resin materials showed no statistically significant difference in either of the two primary outcomes — preventing secondary caries and reducing retention loss (p > 0.05).
Why Do Fillings Come Out? When It Keeps Happening, Simply Sticking It Back Is Not the Answer｜證據鏈
本頁逐條列出本卡每一個 [Fn] 標記對應的文獻出處。
- F1｜Clinical Longevity of Complex Direct Posterior Resin Composite and Amalgam Restorations: A Systematic Review and Meta-analysis. [PMID:40458903]（https://pubmed.ncbi.nlm.nih.gov/40458903/）
- F2｜Effectiveness of bioactive resin materials in preventing secondary caries and retention loss in direct posterior restorations: A systematic review and meta-analysis. [PMID:39547467]（https://pubmed.ncbi.nlm.nih.gov/39547467/）
- F3｜Longevity of Amalgam Versus Composite Resin Restorations in Permanent Posterior Teeth: A Systematic Review. [PMID:40873828]（https://pubmed.ncbi.nlm.nih.gov/40873828/）
- F4｜Bruxism and direct and indirect restorations failure: A scoping review. [PMID:40199416]（https://pubmed.ncbi.nlm.nih.gov/40199416/）
- F5｜Influence of Operative Techniques on Clinical and Laboratory Outcomes in Class II Resin-Based Composite Restorations: A Systematic Review. [PMID:42035254]（https://pubmed.ncbi.nlm.nih.gov/42035254/）
- F6｜Longevity of Repair Versus Replacement of Partially Fractured Direct Composite Restorations in Permanent Teeth: A Systematic Review and Meta-Analysis. [PMID:40831823]（https://pubmed.ncbi.nlm.nih.gov/40831823/）
- F7｜Longevity of composite restorations is definitely not only about materials. [PMID:36494241]（https://pubmed.ncbi.nlm.nih.gov/36494241/）
FAQ
- The filling has come out — can it just be stuck back?
- The piece that came out is usually already deformed or chipped, and the real problem often lies on the tooth side. The literature records that the commonest cause of failure for resin restorations is **secondary caries** [F3][F1] — meaning that when a filling debonds, there is often already new decay underneath. That is why a dentist first cleans the margin and checks the state of the remaining tooth structure before deciding whether to repair or redo it, rather than re-cementing the original piece.
- 詰め物が取れたら、そのまま付け直してもらえますか — 取れてきたその一片は多くの場合すでに変形したり欠けたりしていますし、本当の問題は歯の側にあることが少なくありません。文献はレジン修復で最も多い失敗の原因が**二次う蝕**であることを記録しています [F3][F1]。つまり修復物が外れたとき、その下にはすでに新しいう蝕が生じていることが多いのです。歯科医師がまず辺縁を清掃し、残存歯質の状態を確認してから補修するかやり直すかを決めるのは、そのためであり、もとの一片をそのまま付け直すためではありません。
- The filling has come out — can it just be stuck back? — The piece that came out is usually already deformed or chipped, and the real problem often lies on the tooth side. The literature records that the commonest cause of failure for resin restorations is **secondary caries** [F3][F1] — meaning that when a filling debonds, there is often already new decay underneath. That is why a dentist first cleans the margin and checks the state of the remaining tooth structure before deciding whether to repair or redo it, rather than re-cementing the original piece.
Source anchors
- Clinical Longevity of Complex Direct Posterior Resin Composite and Amalgam Restorations: A Systematic Review and Meta-analysis. [PMID:40458903] · https://pubmed.ncbi.nlm.nih.gov/40458903/ · 在 IDAEO 的其他引用
- Effectiveness of bioactive resin materials in preventing secondary caries and retention loss in direct posterior restorations: A systematic review and meta-analysis. [PMID:39547467] · https://pubmed.ncbi.nlm.nih.gov/39547467/ · 在 IDAEO 的其他引用
- Longevity of Amalgam Versus Composite Resin Restorations in Permanent Posterior Teeth: A Systematic Review. [PMID:40873828] · https://pubmed.ncbi.nlm.nih.gov/40873828/ · 在 IDAEO 的其他引用
- Bruxism and direct and indirect restorations failure: A scoping review. [PMID:40199416] · https://pubmed.ncbi.nlm.nih.gov/40199416/ · 在 IDAEO 的其他引用
- Influence of Operative Techniques on Clinical and Laboratory Outcomes in Class II Resin-Based Composite Restorations: A Systematic Review. [PMID:42035254] · https://pubmed.ncbi.nlm.nih.gov/42035254/ · 在 IDAEO 的其他引用
- Longevity of Repair Versus Replacement of Partially Fractured Direct Composite Restorations in Permanent Teeth: A Systematic Review and Meta-Analysis. [PMID:40831823] · https://pubmed.ncbi.nlm.nih.gov/40831823/ · 在 IDAEO 的其他引用
- Longevity of composite restorations is definitely not only about materials. [PMID:36494241] · https://pubmed.ncbi.nlm.nih.gov/36494241/ · 在 IDAEO 的其他引用
Cite this article
Lucy・《Why Do Fillings Come Out? When It Keeps Happening, Simply Sticking It Back Is Not the Answer｜證據鏈》・IDAEO 知識庫・2026-08-16・https://km.idaeo.ai/post/reports/dental-filling-debonding-evidenceUpdated 2026-08-19