Comparing the impact of slow and rapid maxillary expansion on the upper airway

In patients with maxillary transverse deficiency, what are the effects of slow maxillary expansion compared to rapid maxillary expansion on upper airways as measured by cone beam computed tomography?

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN10853186

Enrollment

Registered

2023-11-09

Start date

2022-07-18

Completion date

Unknown

Last updated

2023-11-20

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

Conditions

Transverse maxillary deficiency Oral Health

Interventions

Patients are randomly selected using a simple manual method, where each patient was asked to draw an envelope containing either Model 1 or Model 2, and then write their name on the envelope they selec

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Patients aged 8-11 years 2. Maxillary transverse constriction

Exclusion criteria

Exclusion criteria: 1. Patients with systemic diseases or craniofacial syndromes 2. Patients with poor oral health 3. Patients with dental crossbite

Design outcomes

Primary

Measure	Time frame
Changes in the upper airways measured using CBCT at T0 before applying device and at T1 after applying the device for 6 months	—

Secondary

Measure	Time frame
The following distances were measured perpendicular to CorPL and SrPL at T0 (before applying the device) and T1 (after applying the device for 6 months) Skeletal measurements 1. Anterior maxillary expansion: RPyP-LPyP 2. Posterior maxillary expansion: RPaFoP-LPaFoP 3. Pterygoid expansion: PtR-PtL Dentoalveolar measurements : 1. Molar expansion: at the molar cusp, CR-CL; at palatal root apex, AR-AL 2. Molar tipping: the difference between (AR-AL) and (CR-CL) Abbreviations: RPyP: Right piriform point. The most lateral and caudal point of the nasal piriform aperture at the boundary with the palatal cortex. This landmark was primarily identified in coronal CT slices passing through the anterior edge of the nasopalatine foramen within the palatal cortex. LPyP: Analogue to RPyP, left side. RPaFoP: Right palatine foramen point. The most posterior point of the right greater palatine foramen in the maxilla within the palatal cortex. LPaFoP: Analogue to RPaFOPr, left side. PtR. Pterygoideous right. The most caudal point of the apex of the right pterygoid process of the sphenoid. PtL. Pterygoideous left. Analogue to PtR, left side. CR: Cuspid right. Mesio-palatal cusp tip of the right maxillary first molar. CL: Cuspid left. Mesio-palatal cusp tip of the left maxillary first molar. AR: Apex right. The apex of the palatal root of the right maxillary first molar. AL: Apex left. The apex of the palatal root of the left maxillary first molar. SrPL: Sagittal reference plane: The sagittal CT slice passing through the middle point of the segment OVpR-OVpL COrPL: Coronal reference plane: The plane passing through OVpR-OVpL the oval point right and left (OVPr / OVPl)	—

Measure

Time frame

The following distances were measured perpendicular to CorPL and SrPL at T0 (before applying the device) and T1 (after applying the device for 6 months) Skeletal measurements 1. Anterior maxillary expansion: RPyP-LPyP 2. Posterior maxillary expansion: RPaFoP-LPaFoP 3. Pterygoid expansion: PtR-PtL Dentoalveolar measurements : 1. Molar expansion: at the molar cusp, CR-CL; at palatal root apex, AR-AL 2. Molar tipping: the difference between (AR-AL) and (CR-CL) Abbreviations: RPyP: Right piriform point. The most lateral and caudal point of the nasal piriform aperture at the boundary with the palatal cortex. This landmark was primarily identified in coronal CT slices passing through the anterior edge of the nasopalatine foramen within the palatal cortex. LPyP: Analogue to RPyP, left side. RPaFoP: Right palatine foramen point. The most posterior point of the right greater palatine foramen in the maxilla within the palatal cortex. LPaFoP: Analogue to RPaFOPr, left side. PtR. Pterygoideous right. The most caudal point of the apex of the right pterygoid process of the sphenoid. PtL. Pterygoideous left. Analogue to PtR, left side. CR: Cuspid right. Mesio-palatal cusp tip of the right maxillary first molar. CL: Cuspid left. Mesio-palatal cusp tip of the left maxillary first molar. AR: Apex right. The apex of the palatal root of the right maxillary first molar. AL: Apex left. The apex of the palatal root of the left maxillary first molar. SrPL: Sagittal reference plane: The sagittal CT slice passing through the middle point of the segment OVpR-OVpL COrPL: Coronal reference plane: The plane passing through OVpR-OVpL the oval point right and left (OVPr / OVPl)

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Countries

Syria

Contacts

Public ContactMahmoud Alzarie

mahmoud.za96@gmail.com+963 (0)994211357

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026