NCT07411092

Three-dimensionally Printed Hyrax Versus Conventional Hyrax for Maxillary Arch Expansion in Adolescents

Three-dimensionally Printed Hyrax Versus Conventional Hyrax for Maxillary Arch Expansion in Adolescents: A Randomized Controlled Trial

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 22 (estimated)
• Sponsor: Ain Shams University · Academic / Other
• Sex: All
• Age: 12 Years – 17 Years
• Healthy volunteers: Accepted

Summary

This clinical trial aims to compare the skeletal and dental effects of conventional Hyrax expanders and 3D-printed Hyrax expanders in adolescent patients with maxillary transverse deficiency. Using cone-beam computed tomography (CBCT) and digital models, the study evaluates the precision, customization, and treatment outcomes of both appliance types to inform evidence-based orthodontic treatment planning.

Detailed description

Maxillary transverse deficiency is a common orthodontic problem that often requires skeletal expansion using appliances such as the Hyrax expander. While conventional Hyrax expanders have been widely used, advancements in digital dentistry have introduced 3D-printed alternatives that offer potential benefits in precision, customization, and patient comfort. However, there is currently no clinical evidence comparing the skeletal and dental effects of these two designs. This study addresses this gap by evaluating and comparing the outcomes of conventional and 3D-printed Hyrax expanders in adolescent patients, a critical developmental stage where maxillary expansion becomes more challenging due to progressive maturation and increased resistance of the mid-palatal suture. The study uses cone-beam computed tomography (CBCT) and digital models to assess skeletal and dental changes, providing clinically relevant data to guide orthodontic treatment planning and appliance selection.

Conditions

• Transverse Maxillary Deficiency
• Maxillary Expansion

Interventions

Type	Name	Description
DEVICE	Three dimensionally printed hyrax expander	Group A : A 3D-printed Hyrax expander designed for rapid maxillary expansion in orthodontic treatment. The device is manufactured using additive manufacturing technology for a customized fit.
DEVICE	Conventionally Fabricated Hyrax Expander	Group B: A conventionally fabricated Hyrax expander used for rapid maxillary expansion . The device is made using traditional laboratory techniques.

Timeline

• Start date: 2025-08-01
• Primary completion: 2026-08-01
• Completion: 2027-01-01
• First posted: 2026-02-13
• Last updated: 2026-02-13

Locations

1 site across 1 country: Egypt