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Sinus floor bone failures in maxillary sinus floor augmentation: a case-control study.

Arthur Rodriguez Gonzalez Cortes1, Lucas Rodrigues Pinheiro, Marcelo Gusmão Paraíso Cavalcanti

  • 1Faculty of Dentistry, McGill University, Montreal, QC, Canada.

Clinical Implant Dentistry and Related Research
|July 11, 2013
PubMed
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Missing posterior teeth and periodontitis history are key risk factors for sinus floor bone failures. These findings impact sinus floor augmentation outcomes in patients with severely atrophic maxilla.

Area of Science:

  • Dental implantology
  • Oral and maxillofacial surgery
  • Periodontology

Background:

  • Severe maxillary bone resorption can cause sinus floor bone failure, complicating sinus floor augmentation procedures.
  • Sinus floor bone failure is defined as the absence of part of the sinus floor due to extreme bone resorption.

Purpose of the Study:

  • To identify risk factors for sinus floor bone failures in patients with severely atrophic posterior maxilla.
  • To assess the impact of sinus floor bone failures on sinus floor augmentation outcomes.

Main Methods:

  • A case-control study included patients with less than 3mm ridge bone height undergoing sinus floor augmentation.
  • Cases had sinus floor bone failure; controls did not. Data included CT scans and clinical records.
  • Conditional logistic regression analyzed risk factors, with p<0.05 considered significant.
Keywords:
schneiderian membrane perforationseverely atrophic maxillasinus floor augmentationsinus floor bone failure

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Last Updated: May 9, 2026

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Main Results:

  • Sinus floor bone failures were significantly associated with more missing posterior teeth (AOR 3.67) and a history of periodontitis (AOR 6.39).
  • Of those undergoing augmentation, membrane perforations occurred in 2 cases and 1 control.
  • No implants were lost during a mean 20-month follow-up.

Conclusions:

  • The number of missing posterior teeth and a history of periodontitis are significant risk factors for sinus floor bone failures.
  • These factors should be considered in the management of severely atrophic posterior maxilla.