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

Open Access 01-12-2017 | Research

The effect of membrane exposure on lateral ridge augmentation: a case-controlled study

Authors: Mehmet A. Eskan, Marie-Eve Girouard, Dean Morton, Henry Greenwell

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

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Abstract

Background

The effect of membrane exposure on guided bone regeneration (GBR) for lateral ridge augmentation has been poorly addressed. This case-controlled study aimed to investigate potential effect of membrane exposure lateral ridge augmentation and subsequent implant placement.

Methods

A total of 14 patients that did receive lateral ridge augmentation procedure using allogeneic cancellous graft particulate in combination with an alloplastic bioresorbable matrix barrier were retrospectively selected for this study. Bone width was measured at the crest with a digital caliper before bone augmentation and at the reopening for implant placement 4 months later for all patients. Cases where primary flap closure was achieved and the barrier did not expose throughout the time until implant placement were assigned to the control group (n = 7). Cases where primary closure could not be achieved or a barrier exposure happened within the first week following the initial surgery were assigned to the test group.

Results

The measured alveolar ridge width before surgery as well as after GBR procedure were not statistically significant different between the two groups (p > 0.05). Both groups showed a significant (p < 0.05) increase in their mean alveolar ridge width 4 months after later augmentation procedure, from 3.4 ± 1.2 to 6.0 ± 1.1 mm in the control group and from 3.6 ± 1.0 to 5.0 ± 1.4 mm in the test group. However, the mean alveolar ridge gain was significantly greater in the control group than in the test group (p < 0.05). Consequently, the reduction of the augmented alveolar ridge was significantly higher in the test group averaging to 4.7 mm than for the control group showing a loss of 3.1 mm after 4 months, respectively. However, in all 14 cases, successful implant placement was achieved after 4 months.

Conclusions

Within the limit of this study, it can be concluded that early exposure of a bioresorbable matrix barrier during lateral ridge augmentation may compromise the results of the GBR procedure but may still result in a favorable alveolar ridge width gain that allows for the placement of dental implants.
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Metadata
Title
The effect of membrane exposure on lateral ridge augmentation: a case-controlled study
Authors
Mehmet A. Eskan
Marie-Eve Girouard
Dean Morton
Henry Greenwell
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/s40729-017-0089-z

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