Rehabilitation of the Atrophic Posterior Maxilla Using Short Implants or Sinus Augmentation with Simultaneous Standard-Length Implant Placement: A 3-Year Randomized Clinical Trial

Francesco Pieri, Nicolò Nicoli Aldini, Milena Fini, Claudio Marchetti, Giuseppe Corinaldesi

Research output: Contribution to journalArticle


Purpose: To evaluate whether 6-mm-long implants (test group) could be a suitable alternative to standard-length implants (≥11mm; control group) placed simultaneously with a sinus augmentation for the treatment of atrophic posterior maxillae. Materials and Methods: In total, 68 patients having 6 to 7mm of residual bone height and at least 6mm thickness below the sinus were randomly allocated to the two treatment groups. Two or three implants were placed in each patient and submerged for 4 months. Outcome measures were implant failures, complications, operation time, postoperative pain and swelling, soft tissue parameters, marginal bone levels, and implant stability quotient (ISQ) values. Patients were followed for 3 years after loading. Results: Two dropouts occurred, one in each group. Three of 73 control implants and one of 71 test implants failed. At 3 years, mean marginal bone loss was 0.57±0.82mm in the control group versus 0.45±0.34mm in the test group. No significant difference was observed between groups in terms of implant failures, prosthetic complications, soft tissue parameters, marginal bone loss, or ISQ values. However, the control procedure required significantly longer operation times and led to more surgical complications, pain, and swelling, compared with the test procedure. Conclusions: Both techniques showed similar clinical and radiographic outcomes at 3 years, but the short implants provided advantages in terms of reduced surgical time and invasiveness.

Original languageEnglish
JournalClinical Implant Dentistry and Related Research
Publication statusAccepted/In press - 2012



  • Marginal bone loss
  • Maxillary sinus augmentation
  • Resonance frequency analysis
  • Short dental implants
  • Survival rate

ASJC Scopus subject areas

  • Spectroscopy
  • Catalysis
  • Pharmacology
  • Education
  • Oral Surgery
  • Dentistry(all)

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