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01-07-2017 | Original Article

The randomized shortened dental arch study: influence of two different treatments on interdental spacing over 5 years

Authors: Jaana-Sophia Kern, Stefan Wolfart, Ralf-Dieter Hilgers, Birgit Marré, Herbert Scheller, Jörg Strub, Klaus Böning, Wolfgang Hannak, Ralph G. Luthardt, Guido Heydecke, Jan Huppertz, Peter Pospiech, Bernd Wöstmann, Helmut Stark, Torsten Mundt, Florentine Jahn, Matthias Kern, Daniel Edelhoff, Michael H. Walter

Published in: Clinical Oral Investigations | Issue 6/2017

Abstract

Objectives

Being a secondary outcome in a multicenter randomized controlled trial, the present analysis focused on interdental spacing in the shortened dental arch (SDA). The aim was to evaluate changes in interdental spacing in dependence of two different treatments after an observation period of up to 5 years.

Material and methods

Patients were either treated with a partial removable dental prosthesis (PRDP) for molar replacement (PRDP group) or according to the SDA concept aiming at a premolar occlusion (SDA group) in a randomized manner. Interdental spacing in the anterior region was measured with gauges and categorized as “0” (<0.1 mm), “1” (<0.5 mm), “2” (0.5–1 mm), and “3” (>1 mm). The statistical analysis was performed with analysis of variance models followed by linear contrast.

Results

Ninety-one patients (SDA n = 41, PRDP n = 50) were included. Changes of interdental spacing were detected in 70.7 % of all cases. A significant difference between the mean score changes was found in the mandible comparing the PRDP group and the SDA group. The respective mean score changes from baseline to 5 years were 0.23 (SD 0.49) for the PRDP group and 0.02 (SD 0.30) for the SDA group (p = 0.023).

Conclusions

Major interdental spacing could be observed in neither of the groups. The SDA concept resulted in a slightly better outcome.

Clinical relevance

When deciding whether to replace missing molars, the present results give further support to the SDA concept.

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Title: The randomized shortened dental arch study: influence of two different treatments on interdental spacing over 5 years
Authors: Jaana-Sophia Kern
Stefan Wolfart
Ralf-Dieter Hilgers
Birgit Marré
Herbert Scheller
Jörg Strub
Klaus Böning
Wolfgang Hannak
Ralph G. Luthardt
Guido Heydecke
Jan Huppertz
Peter Pospiech
Bernd Wöstmann
Helmut Stark
Torsten Mundt
Florentine Jahn
Matthias Kern
Daniel Edelhoff
Michael H. Walter
Publication date: 01-07-2017
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 6/2017
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-016-1981-2

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Springer Medicine

The randomized shortened dental arch study: influence of two different treatments on interdental spacing over 5 years

Abstract

Objectives

Material and methods

Results

Conclusions

Clinical relevance

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Objectives

Material and methods

Results

Conclusions

Clinical relevance

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