Comparison Between Two Rates of Activation of Miniscrew-Supported Upper Jaw Expander in Adolescents

Alexandria University

Status: Completed

Conditions: Posterior Crossbite; Maxillary Hypoplasia; Malocclusion; Palatal Expansion Technique

Treatments: Device: Miniscrew-Supported Maxillary Expander- Rapid activation; Device: Miniscrew-Supported Maxillary Expander- Slow activation

Study type: Interventional

Funder types: Other

Identifiers

NCT04225637

01012019

Details and patient eligibility

About

Miniscrew-supported maxillary expanders provide advantages over conventional tooth-supported expanders. However, there is no consensus in the literature regarding their activation protocol. The purpose of the clinical trial is to evaluate and compare the effects of slow and rapid activation rates of miniscrew-supported expanders on the skeletal changes, dento-alveolar changes and the pain experience.

Full description

Transverse maxillary deficiency is one of the problems that are commonly encountered in the orthodontic practice. Miniscrew-supported maxillary expansion represents a promising modality for the treatment of transverse maxillary deficiency. However, controversies still exist regarding the activation protocol. One of these controversies is whether using a slow activation protocol would be more beneficial to the patients compared to a rapid activation protocol. Another question that consequently ensues is whether such activation protocol would result in less pain compared to the rapid activation protocol.

The null hypothesis of the current study is that there is no difference between slow and rapid activation protocols of miniscrew-supported expander.

Enrollment: 30 patients

Sex: All

Ages: 12 to 16 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Permanent dentition.
• Participants indicated for skeletal maxillary expansion due to unilateral or bilateral posterior cross bite or maxillary transverse deficiency
• Good oral hygiene

Exclusion criteria

• History of previous orthodontic or orthopedic treatment
• History of maxillary trauma
• Patients with congenital craniofacial malformations
• Patients receiving pharmacological agents or having systemic diseases that might affect the bone metabolism or the pain response

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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30 participants in 2 patient groups

Slow maxillary expansion

Experimental group

Description:

The miniscrew-supported maxillary expander is activated by turning the expansion screw once every other day.

Treatment:

Device: Miniscrew-Supported Maxillary Expander- Slow activation

Rapid maxillary expansion

Experimental group

Description:

The miniscrew-supported maxillary expander is activated by turning the expansion screw twice daily.

Treatment:

Device: Miniscrew-Supported Maxillary Expander- Rapid activation