Long-term stability after Class II treatment with the Herbst appliance

Long-term stability after Class II treatment with the Herbst appliance - Long-term stability Herbst treatment

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00006354

Enrollment

Registered

2014-07-21

Start date

2014-04-15

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Class II malocclusion (stability after treatment) K07

Interventions

Group 1: (after) Herbst treatment

taking impressions to obtain study models, inspection of oral cavity, screening of temporomandibular joint and lower jaw mobility, taking photographs Group 2: Class I occlusion (untreated)

evaluation of orthodontic study models, no clinical assessment

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Herbst patients: Orthodontic Herbst appliance treatment as well as subsequent multibracket appliance treatment, treatment completed at least 15 years ago, pre-treatment overjet = 6mm and Class II molar relationship = 0,5 cusp widths (bilaterally) / 1,0 cusp widths (unilaterally) Control group: Class I occlusion, no orthodontic treatment, observation period of at least 15 years (documentation by orthodontic study models)

Exclusion criteria

Exclusion criteria: Failure of inclusion criteria, incomplete treatment records

Design outcomes

Primary

Measure	Time frame
Stability of overjet during the post-treatment observation period; changes > 1 millimeter compared to the control group are to be considered as clinically relevant (measurements performed on orthodontic study models).	—

Secondary

Measure	Time frame
Changes of overbite, sagittal molar- and canine relationship (assessment using orthodontic study models from before treatment, after treatment and after the post-treatment period); Changes of facial profile (assessment from photographs from before treatment, after treatment and after the post-treatment period); Evaluation of orthodontic diagnosis (PAR-Index) using orthodontic study models from before treatment, after treatment and after the post-treatment period); Evaluation of general oral health and temporomandibular joint function as well as the current orthodontic treatment need by means of clinical inspection	—

Measure

Time frame

Changes of overbite, sagittal molar- and canine relationship (assessment using orthodontic study models from before treatment, after treatment and after the post-treatment period); Changes of facial profile (assessment from photographs from before treatment, after treatment and after the post-treatment period); Evaluation of orthodontic diagnosis (PAR-Index) using orthodontic study models from before treatment, after treatment and after the post-treatment period); Evaluation of general oral health and temporomandibular joint function as well as the current orthodontic treatment need by means of clinical inspection

—

Countries

Germany

Contacts

Public ContactNiko Christian Bock

Justus-Liebig-Universität GiessenPoliklinik für Kieferorthopädie

niko.c.bock@dentist.med.uni-giessen.de0641-9946123

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026