NCT07454694

Comparison Of The Effects Of Clear Aligners And Twinblock Appliances In Functional Treatment Of Class II Malocclusion

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 34 (actual)
• Sponsor: Bezmialem Vakif University · Academic / Other
• Sex: All
• Age: 10 Years – 14 Years
• Healthy volunteers: Not accepted

Summary

This prospective clinical study aimed to compare the skeletal and dentofacial effects of Twin Block (TWB) and clear aligners with mandibular advancement, and to evaluate mandibular trabecular bone changes through fractal analysis (FA).

Detailed description

A total of 34 patients with dentoskeletal Class II malocclusion were included in the study: 16 patients in the Invisalign® Mandibular Advancement (MA) group and 18 patients in the TWB group .Panoramic and lateral cephalometric radiographs were obtained at baseline(T0) and after functional treatment(T1). Skeletal, dental, and soft tissue structures were evaluated on the pretreatment and posttreatment radiographs using cephalometric analysis, while trabecular bone architecture was assessed by fractal analysis.

Conditions

• Class II Malocclusion
• Mandibular Retrognathism

Interventions

Type	Name	Description
DEVICE	Invisalign Clear Aligners	Functional appliances are used for mandibular advancement in the treatment of mandibular retrognathia in orthodontics. The Twinblock is a conventional functional appliance, and nowadays mandibular advancement can also be achieved with clear aligners. In this study, these two appliances were used.
DEVICE	Twinblock Functional Appliance	Functional appliances are used for mandibular advancement in the treatment of mandibular retrognathia in orthodontics. The Twinblock is a conventional functional appliance, and nowadays mandibular advancement can also be achieved with clear aligners. In this study, these two appliances were used.

Timeline

• Start date: 2023-08-01
• Primary completion: 2025-07-22
• Completion: 2025-08-01
• First posted: 2026-03-06
• Last updated: 2026-03-06

Locations

1 site across 1 country: Turkey (Türkiye)