Stomatologist № 1 (24) – 2017, pp. 89-94                                                                                                                                   Scientific publication

Crown-to-implant ratio of short locking-taper implants placed in posterior areas of the maxilla: a retrospective study 2 years after loading

Lombardo Giorgioa, Pighi Jacopob, Corrocher Giovannib, Simancas Pallares Miguel Angelc, Marincola Maurod, Nocini Pier Francescoe
aMD DDS, Associate Professor, Clinic of Dentistry and Maxillofacial Surgery, University of Verona, Italy
bDDS, Clinic of Dentistry and Maxillofacial Surgery, University of Verona, Italy
cDDS MSC, Department of Investigation, Universidad de Cartagena, Colombia
dMD DDS, Clinical Assistance Professor, Universidad de Cartagena, Colombia
eMD DDS, Full Professor, Chief of the Clinic of Dentistry and Maxillofacial Surgery, University of Verona, Italy

https://doi.org/10.32993/stomatologist.2017.1(24).1

ABSTRACT
Introduction: The purpose was to study any relationship between crown-to-implant ratio and peri-implant bone loss of short, plateau-design, locking taper implants in posterior maxillary areas.
Methods: This retrospective clinical study was conducted between May 2013 and September 2013. The sample was composed of patients who had received at least one short implant(5-to-8-mm-long) between January 2009 and December 2011. The outcome variables were implant failure and peri-implant bone loss in relation to crown-to-implant ratio. Analysis of variance (ANOVA) was used to check out correlations between crown-to-implant ratio and peri-implant bone loss.
Results: Thirty-six subject who received 79 locking-taper implants were followed for an average of 24 months. Four implants failed, giving a cumulative survival rate (CSR) of 94.9%. The mean crown-to-implant ratio was 2.01. The peri-implant bone loss between prosthetic loading and last recall was 0.21 mm. No statistically significant relationship was observed between increasing crown-implant ratios and marginal bone loss (P = .93).
Conclusion: The crown-to-implant ratio, although high, was not associated to increased bone loss. However further studies with longer follow-up are needed to confirm our data.

Keywords:plateau-design implants, implant-abutment connection, resorbed posterior maxilla, retrospective study

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