Enrolling by invitationObservationalLast updated Aug 7, 2026

Long-term Stability of Treatment With the Twin Block Appliance

Overview

ClinicalTrials.gov ID: NCT07752498
Lead Sponsor: Region Jönköping CountyOTHER_GOV
Brief Summary: The objective of this observational study is to investigate the long-term stability of treatment with the Twin block appliance in a patient group previously treated with a Twin block appliance. The main questions it aims to answer are:

Does treatment with the Twin block appliance give a lasting treatment result or does the bite relapse over time due to different factors such as short treatment time, compliance or the patient's natural growth pattern?

How many patients that had received treatment with Twin block appliance required additional treatment with fixed appliances and for what reason?

Researchers will compare the patients present bite at (T2) by using study casts and cephalometric x-rays and compare this data with previous registrations made pre- (T0) and post-treatment (T1). Additional factors, such as how much relapse a patient has on average, will also be investigated.

Status

Study Record Dates

NCT05155774Completed

Treatment Adherence With Twin-Blocks for Correction of Class II Malocclusion

NCT04619446Completed

Dentoskeletal Changes Produced by Growth Modification Appliances in Treatment of Skeletal Class II Malocclusion

NCT07687927Completed

Fixed Versus Conventional Twin Block Appliances for Skeletal Class II Malocclusion

NCT04562545Unknown status

Twin Block Appliance in Incremental Versus Maximum Bite Advancement in Skeletal Class II

NCT07608406Active, not recruiting

Modified Versus Clear Twin Block for Skeletal Class II Malocclusion

NCT07277543Completed

Assessment of Dentoskeletal Changes After Treatment of Skeletal classII by Twinblock Versus Monoblock Appliances