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Evolution of in vivo assessed retention forces in one‐piece mini dental implant‐retained mandibular overdentures: 5‐Year follow‐up of a prospective clinical trial


Abou‐Ayash, Samir; Enkling, Norbert; Srinivasan, Murali; Haueter, Marius; Worni, Andreas; Schimmel, Martin (2019). Evolution of in vivo assessed retention forces in one‐piece mini dental implant‐retained mandibular overdentures: 5‐Year follow‐up of a prospective clinical trial. Clinical Implant Dentistry and Related Research, 21(5):968-976.

Abstract

BACKGROUND:
The evolution of retention forces in one-piece mini dental implants (MDIs) retaining implant overdentures (IODs) is of major importance, as the male parts cannot be exchanged, due to the implant design.
PURPOSE:
To report the evolution of retention forces of one-piece MDIs, retaining mandibular IODs with ball/ O-ring attachments during 5 years assessed in vivo.
MATERIALS AND METHODS:
Four MDIs were installed in the interforaminal region and immediately loaded using the existing mandibular complete denture. Directly post-op, at the 1-year and the 5-year follow-up, the retention forces were assessed with a validated strain gauge at each implant site separately.
RESULTS:
At the male part, changes could only be observed at implant site 34: During the first year, there was a statistically significant increase, whereas the retention forces were decreased at the 5-year follow-up. At the female part, retention forces decreased significantly over time. Baseline values could be reestablished by exchanging the O-rings. The changes of the retention forces were more obvious in the posterior, compared to the anterior implants.
CONCLUSIONS:
Retention forces at the female part decrease significantly over time, when retaining mandibular IODs by MDIs with ball/ O-ring attachments. Baseline values can be reestablished by exchanging the O-rings. At the male part, changes of retention forces depend on the implant location.

Abstract

BACKGROUND:
The evolution of retention forces in one-piece mini dental implants (MDIs) retaining implant overdentures (IODs) is of major importance, as the male parts cannot be exchanged, due to the implant design.
PURPOSE:
To report the evolution of retention forces of one-piece MDIs, retaining mandibular IODs with ball/ O-ring attachments during 5 years assessed in vivo.
MATERIALS AND METHODS:
Four MDIs were installed in the interforaminal region and immediately loaded using the existing mandibular complete denture. Directly post-op, at the 1-year and the 5-year follow-up, the retention forces were assessed with a validated strain gauge at each implant site separately.
RESULTS:
At the male part, changes could only be observed at implant site 34: During the first year, there was a statistically significant increase, whereas the retention forces were decreased at the 5-year follow-up. At the female part, retention forces decreased significantly over time. Baseline values could be reestablished by exchanging the O-rings. The changes of the retention forces were more obvious in the posterior, compared to the anterior implants.
CONCLUSIONS:
Retention forces at the female part decrease significantly over time, when retaining mandibular IODs by MDIs with ball/ O-ring attachments. Baseline values can be reestablished by exchanging the O-rings. At the male part, changes of retention forces depend on the implant location.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Klinik für Allgemein-, Behinderten- und Seniorenzahnmedizin
Dewey Decimal Classification:610 Medicine & health
Scopus Subject Areas:Health Sciences > Oral Surgery
Health Sciences > General Dentistry
Uncontrolled Keywords:Oral Surgery, General Dentistry
Language:English
Date:1 October 2019
Deposited On:13 Jan 2020 16:05
Last Modified:29 Jul 2020 12:40
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:1523-0899
OA Status:Closed
Publisher DOI:https://doi.org/10.1111/cid.12816
PubMed ID:31313455

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