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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

Open Access 24-02-2023 | Original Article

Long-term (≥ 15 years) outcome quality after Class II:1 bionator or Herbst multibracket appliance treatment

A comparison

Authors: PD Dr. Niko Christian Bock, Dr. Rebecca Jungbauer, Prof. Dr. Ingrid Rudzki, Prof. Dr. Dr. Peter Proff, Prof. Dr. Sabine Ruf

Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

Abstract

Purpose

To compare the long-term outcome quality (≥ 15 years) of Class II:1 treatment using either a bionator (BIO) or a Herbst–multibracket appliance (HMB).

Methods

Patients who underwent functional treatment during the ideal treatment period for the respective approach (prepuberty vs. peak/postpeak) were assessed. Inclusion criteria were overjet ≥ 4 mm, skeletal Class II and availability of study casts from before, after and ≥ 15 years after treatment. The study casts were assessed using the Peer Assessment Rating (PAR) index and standard orthodontic cast measurements.

Results

During treatment, PAR score, overjet and sagittal occlusal relationship improved significantly in all groups. Long-term, there was a significant increase of incisor irregularity in the upper (HMB) and lower (BIO) arch and a significant decrease of lower arch width 3 – 3 (BIO). PAR score, overjet, and sagittal occlusal relationship remained stable long-term. Intergroup comparisons revealed significant differences between the BIO and HMB groups in terms of lower arch width (6 – 6), upper and lower arch width (3 + 3/3 – 3) as well as sagittal molar relationship.

Conclusions

The achieved improvement in PAR score, overjet, and sagittal occlusion remained comparably stable long-term in all groups. The long-term changes are probably a consequence of natural aging.

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Title: Long-term (≥ 15 years) outcome quality after Class II:1 bionator or Herbst multibracket appliance treatment
A comparison
Authors: PD Dr. Niko Christian Bock
Dr. Rebecca Jungbauer
Prof. Dr. Ingrid Rudzki
Prof. Dr. Dr. Peter Proff
Prof. Dr. Sabine Ruf
Publication date: 24-02-2023
Publisher: Springer Medizin
Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
Print ISSN: 1434-5293
Electronic ISSN: 1615-6714
DOI: https://doi.org/10.1007/s00056-023-00457-3

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Long-term (≥ 15 years) outcome quality after Class II:1 bionator or Herbst multibracket appliance treatment

A comparison

Abstract

Purpose

Methods

Results

Conclusions

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Abstract

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