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Short implants (6mm) vs. vertical bone augmentation and standard-length implants (≥9mm) in atrophic posterior mandibles: a 5-year retrospective study.

Authors
  • Pieri, F1
  • Forlivesi, C2
  • Caselli, E3
  • Corinaldesi, G4
  • 1 Private practice, Cesena, Italy. Electronic address: [email protected] , (Italy)
  • 2 Private practice, Cesena, Italy. , (Italy)
  • 3 Private practice, Ancona, Italy. , (Italy)
  • 4 Department of Biomedical and Neuromotorial Science, University of Bologna, Bologna, Italy. , (Italy)
Type
Published Article
Journal
International journal of oral and maxillofacial surgery
Publication Date
Dec 01, 2017
Volume
46
Issue
12
Pages
1607–1614
Identifiers
DOI: 10.1016/j.ijom.2017.07.005
PMID: 28751181
Source
Medline
Keywords
License
Unknown

Abstract

This retrospective study compared the 5-year clinical and radiographic outcomes of short implants (6 mm) (short group), and standard-length implants (≥9mm) placed after a vertical augmentation with autologous bone blocks (augmentation group), supporting partial fixed prostheses in the posterior mandible. Forty-five partially edentulous patients were enrolled in the study and evaluated after 5 years: 22 (51 implants) in the augmentation group and 23 (46 implants) in the short group. Eight surgical complications occurred in the augmentation group versus none in the short group (P=0.003). One short implant failed before loading and one standard-length implant failed after 4 years because of peri-implantitis (P=1.0). Eight biological and two prosthetic complications occurred in the augmentation group vs. three biological and three prosthetic complications in the short group (P=0.09 and P=1.0, respectively). A mean marginal bone loss of 1.61±1.12mm in the augmentation group and 0.68±0.68mm in the short group was found (P=0.002). Within the limitations of this study, both techniques resulted in successful clinical results after 5 years, but short implants exhibited less surgical complications and marginal bone loss than standard-length implants placed in augmented bone.

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