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International Journal of Implant Dentistry
Published in: International Journal of Implant Dentistry 1/2017

Open Access 01-12-2017 | Technical advance

Novel expandable short dental implants in situations with reduced vertical bone height—technical note and first results

Authors: Waldemar Reich, Ramona Schweyen, Christian Heinzelmann, Jeremias Hey, Bilal Al-Nawas, Alexander Walter Eckert

Published in: International Journal of Implant Dentistry | Issue 1/2017

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Abstract

Purpose

Short implants often have the disadvantage of reduced primary stability. The present study was conducted to evaluate the feasibility and safety of a new expandable short dental implant system intended to increase primary stability.

Methods

As a “proof of concept”, a prospective clinical cohort study was designed to investigate intraoperative handling, primary and secondary implant stability (resonance frequency analysis), crestal bone changes, implant survival and implant success, of an innovative short expandable screw implant. From 2014 until 2015, 9 patients (7–9-mm vertical bone height) with 30 implants (length 5–7 mm, diameter 3.75–4.1 mm) were recruited consecutively.

Results

All 30 implants in the 9 patients (age 44 to 80 years) could be inserted and expanded without intraoperative problems. Over the 3-year follow-up period, the implant success rate was 28/30 (93.3%). The mean implant stability quotients (ISQ) were as follows: primary stability, 69.7 ± 10.3 ISQ units, and secondary stability, 69.8 ± 10.2 ISQ units (p = 0.780), both without significant differences between the maxilla and mandible (p ≥ 0.780). The mean crestal bone changes after loading were (each measured from the baseline) as follows: in the first year, 1.0 ± 0.9 mm in the maxilla and 0.7 ± 0.4 mm in the mandible, and in the second year, 1.3 ± 0.8 mm and 1.0 ± 0.7 mm, respectively.

Conclusions

Compared to other prospective studies, in this indication, the success rate is acceptable. Implant stability shows high initial and secondary stability values. The system might present an extension of functional rehabilitation to the group of elderly patients with limited vertical bone height. Further long-term investigations should directly compare this compressive implant with standard short implants.
Appendix
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Metadata
Title
Novel expandable short dental implants in situations with reduced vertical bone height—technical note and first results
Authors
Waldemar Reich
Ramona Schweyen
Christian Heinzelmann
Jeremias Hey
Bilal Al-Nawas
Alexander Walter Eckert
Publication date
01-12-2017
Publisher
Springer Berlin Heidelberg
Published in
International Journal of Implant Dentistry / Issue 1/2017
Electronic ISSN: 2198-4034
DOI
https://doi.org/10.1186/s40729-017-0107-1

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