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3D-Printed Versus Laboratory-Fabricated Hyrax Expanders

3D-Printed Versus Laboratory-Fabricated Hyrax Expanders: A Randomized Controlled Clinical Trial

Who can join

Ages 8 to 13 · All sexes · Healthy volunteers welcome

Inclusion Criteria:

* Maxillary anterior and/or posterior transverse deficiency with or without crossbite
* Age of 8-13 years
* Children whose parents/guardians are willing to consent to the child participating in the study
* Children ages 12-13 who are willing to assent to participating in the study
* Children who are orthodontic patients at the Medical University of South Carolina Department of Orthodontics or University of Pittsburgh School of Dental Medicine
* Subjects and parents/guardians who have access to an electronic device with internet connection

Exclusion Criteria:

* Patients with previous or ongoing orthodontic treatment
* Patients whose parents have a strong preference as to which expander is used
* Patients with a history of temporomandibular disorders
* Presence of congenitally missing teeth
* Traumatic loss of maxillary incisors
* Patients with craniofacial syndromes, or cleft lip and/or palate

About the study

Maxillary expanders are orthodontic appliances that are commonly used to expand the upper jaw. The purpose of this study will be to compare the effects produced by two different maxillary expanders in children 8-13 years old. The first type of expander is made by hand in an orthodontic laboratory, and the second type of expander is designed on a computer and printed using 3D printers. Both expanders are already used in the MUSC Orthodontics Clinic. The purpose of this study is to see if the 3D printed expander is as effective as the traditional expander made by hand in the laboratory, with more comfort to the patient. Patients participating in the study will be randomly assigned to one of two groups: group A will be treated with a laboratory-made maxillary expander, and group B with a 3D-Printed maxillary expander. Information will be collected on the participants' standard clinical follow-up visits including photos, x-rays, and dental photo scans over the course of 6 months to see how the expander is working. In addition, as part of the research study, the participant will be asked to complete online questionnaires with assistance from parents or guardians about his/her quality of life and perception of possible pain and discomfort at different time points. The potential benefits of this study include the use of 3D technology to improve the quality of the orthodontic treatment, with more comfort to the patient.

What is being tested

• 3D-Printed Hyrax Expander (device)
• Conventional Laboratory Fabricated Hyrax Expander (device)

Sponsor: Ildeu Andrade Jr. · Participants: 42 · Started: Feb 15, 2023

Contact the study team

• Ildeu Andrade, DDS, MS, PhD · Phone: 843-792-3366

Official record on ClinicalTrials.gov — NCT05743127

Locations in the U.S.

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.