Using a Mousetrap Appliance to Intrude Maxillary Molars in Adults with Anterior Open Bite

Evaluation of Maxillary Posterior Teeth Intrusion by Skeletally Anchored Mousetrap Appliance in Adult Patient With Anterior Open Bite

NA · Mansoura University · NCT06757686

This study is testing if a special device can help move back upper back teeth in young adults with a specific bite problem to see if it improves their dental alignment.

Quick facts

PhaseNA
Study typeInterventional
Enrollment20 (estimated)
Ages15 Years to 27 Years
SexAll
SponsorMansoura University (other)
Locations1 site (Al Mansurah)
Trial IDNCT06757686 on ClinicalTrials.gov

What this trial studies

This clinical study evaluates the effects of a Mousetrap appliance on the intrusion of maxillary posterior teeth in adults with anterior open bite. The trial will involve 20 participants aged 15 to 27 years who will receive mini-implants inserted in the anterior palate to facilitate the treatment. The study will assess dental, skeletal, and soft tissue changes through intraoral scans, radiographs, and clinical photographs taken before and after the intrusion process. The Mousetrap appliance is designed to promote molar intrusion while maintaining the vertical dimension of the teeth.

Who should consider this trial

Good fit: Ideal candidates are healthy adults aged 15 to 27 years with skeletal Class I, II, or mild Class III relationships and an anterior open bite of 3-8 mm.

Not a fit: Patients with moderate to severe Class III skeletal relationships or those with periodontal issues may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could provide a novel orthodontic solution for adults with anterior open bite, improving their dental alignment and function.

How similar studies have performed: While the specific Mousetrap appliance approach may be novel, similar methods of using skeletal anchorage for molar intrusion have shown promise in previous studies.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age ranging from 15 to 27 years.
* High angle patients with skeletal Class I, II or mild Class III.
* Patients with anterior open bite requiring maxillary posterior teeth intrusion as part of orthodontic treatment.
* Anterior open bite: range from 3-8 mm.
* Healthy adult patients.
* No previous orthodontic treatment.
* No evidence of either periodontal problems, gingival problems, or bruxism, at the beginning of orthodontic treatment.
* No medical problems interfering with orthodontic treatment.

Exclusion Criteria:

* Moderate to severe Class III skeletal relationship patients were excluded, as the molars intrusion would lead to increase the severity of Class III malocclusion.
* Patient with bad oral hygiene.
* Periodontal problems.

Where this trial is running

Al Mansurah

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Maxillary Molar Intrusion

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.