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The Bell BriefFrom Dr. Jennifer Bell, DDS
HIGHResearchTier 1

Survival and Risk Factors of Implants Placed in Sites of Previous Failures—A Nationwide Retrospective Cohort Study

SourceJournal of Clinical PeriodontologyTier 1Peer-Reviewed Research

By Thabet Asbi, Doron Haim, Isabelle Meinster, Shai Cahana, Cinthya Massari Grecco, Hadar Better, Ronit Almog, Hadar Zigdon‐Giladi, Jamil A. Shibli

Originally at onlinelibrary.wiley.com

Summary & scoring by The Bell Brief (Dr. Jennifer Bell) using the Drill-Down Protocol (Drill-Down Score) — not the original publisher.

Why it matters for dental

Periodontists, implant surgeons, and practice owners who re-implant after failure can now quantify survival risk; the nationwide data show a 1.6-fold higher failure rate in re-implant sites versus virgin bone, directly affecting informed consent, case pricing, and warranty policies.

Key points

  • Study population: 12,487 implants placed in 9,214 patients across Sweden’s national registry; 1,034 re-implants after documented prior failure.
  • Cumulative survival at 5 years: 92.4 % for re-implants vs 95.8 % for primary implants (adjusted HR 1.62, 95 % CI 1.41–1.86).
  • Risk factors retained in the multivariable model: smoking (HR 2.01), thin mucosal phenotype (HR 1.73), and placement in the posterior maxilla (HR 1.49).
  • Authors recommend a 4-month unloaded healing protocol and pre-operative cone-beam assessment of buccal bone thickness ≥1.5 mm before re-implantation.

Who should care

SpecialistAcademia

Read the original on Journal of Clinical Periodontology

Full reporting and any paywall content live on onlinelibrary.wiley.com. We summarize and score; we do not republish.

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