Journal article

Stability of Class II fixed functional appliance therapy-a systematic review and meta-analysis


Authors listBock, Niko C.; von Bremen, Julia; Ruf, Sabine

Publication year2016

Pages129-139

JournalEuropean Journal of Orthodontics

Volume number38

Issue number2

ISSN0141-5387

eISSN1460-2210

Open access statusGreen

DOI Linkhttps://doi.org/10.1093/ejo/cjv009

PublisherOxford University Press


Abstract

To systematically search for scientific evidence concerning the stability of treatment (Tx) results achieved by means of Class II fixed functional appliance therapy and to assess possible differences between appliances.

An electronic search of databases and orthodontic journals was carried out (until December 2013), with supplemental hand searching. In addition to the names of all identified appliances, the term fixed functional was used in combination with each of the following search terms: long-term, post-Tx, relapse, retention, stability.

To be included in the review, the articles had to contain clear data on: Class II Tx with a fixed functional appliance (> 5 patients), post-Tx period a parts per thousand yen 1 year, assessment of ANB angle, Wits appraisal, molar relationship, soft-tissue profile convexity excluding the nose, overjet and/or overbite.

The literature search revealed 20 scientific investigations which corresponded to only two of the 76 identified appliances (Herbst and Twin Force Bite Corrector). As only one publication was found for the Twin Force Bite Corrector, a meta-analysis could only be performed for Herbst Tx. The data were extracted, pooled and weighted according to the number of patients in each study.

The mean values for post-Tx relapse (percentages relative to the Tx changes) were: ANB angle 0.2 degrees (12.4 per cent), Wits appraisal 0.5mm (19.5 per cent), sagittal molar relationship 1.2mm/0.1 cusp widths (21.8 per cent /6.5 per cent); soft-tissue profile convexity excluding nose less than 0.1 degrees (1.0 per cent), overjet 1.8mm (26.2 per cent), overbite Class II:1 1.4mm (44.7 per cent), overbite Class II:2 1.0mm (22.2 per cent).

The scientific evidence concerning the stability of Tx results is inexistent for most fixed functional appliances for Class II correction except for Herbst appliance Tx. Even if the evidence level of most included studies is rather low, good dentoskeletal stability without clinically relevant changes was found for most variables.




Citation Styles

Harvard Citation styleBock, N., von Bremen, J. and Ruf, S. (2016) Stability of Class II fixed functional appliance therapy-a systematic review and meta-analysis, European Journal of Orthodontics, 38(2), pp. 129-139. https://doi.org/10.1093/ejo/cjv009

APA Citation styleBock, N., von Bremen, J., & Ruf, S. (2016). Stability of Class II fixed functional appliance therapy-a systematic review and meta-analysis. European Journal of Orthodontics. 38(2), 129-139. https://doi.org/10.1093/ejo/cjv009



Keywords


ADULT-CLASS-IIDENTOSKELETAL CHANGESDIVISION-1 MALOCCLUSIONSFACIAL PROFILE CHANGESherbst applianceJASPER-JUMPERLONG-TERM-STABILITYOCCLUSAL CHANGESPOSITION CHANGES


SDG Areas


Last updated on 2025-10-06 at 10:37