Treatment Effects of Vertical Holding Appliance in Comparison to Zachrisson Transpalatal Arch on Anterior Open Bite Correction

Treatment Effects of Vertical Holding Appliance in Comparison to Zachrisson Transpalatal Arch on Anterior Open Bite Correction During Mixed Dentition: A Randomized Controlled Trial

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT07379632

Enrollment

Registered

2026-01-30

Start date

2024-01-01

Completion date

2026-06-01

Last updated

2026-01-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Anterior Open Bite in Mixed Dentition

Brief summary

The aim of the study is to assess the treatment effects of ZTPA versus VHA in the correction of anterior open bite in mixed dentition.

Interventions

DEVICEZachrisson transpalatal arch

transpalatal arch with 2 posterior loops and 1 anterior loop

DEVICEVertical holding appliance

transpalatal arch with arcylic button

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

6 Years to 12 Years

Healthy volunteers

Yes

Inclusion criteria

1. Children with the age rage from 6-12 years old. 2. Both male and female. 3. Class I and II skeletal and dental. 4. Skeletal anterior open bite. 5. Maxillary and mandibular incisors and upper first molars erupted. 6. Good oral hygiene.

Exclusion criteria

1. Systemic disease. 2. Missing teeth. 3. Previous orthodontic treatment. 4. Presence of posterior crossbites.

Design outcomes

Primary

Measure	Time frame
Vertical skeletal measurements using cephalometric analysis	9 months

Secondary

Measure	Time frame
Overbite reduction	9 months

Countries

Egypt

Contacts

CONTACTola a yehia, master

ola.alaa@dentistry.cu.edu.eg01015618886

CONTACTyomna a yehia, master

yomna.alaa@dentistry.cu.edu.eg01001459692

PRINCIPAL_INVESTIGATORola a yehia, master student

Cairo University

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026