Efficacy of Digital Versus Conventional Nance and Transpalatal Arch Appliances for Space Maintenance

Status

Completed

Phases

Unknown

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT07593378

Acronym

TPA

Enrollment

115

Registered

2026-05-18

Start date

2025-06-02

Completion date

2026-07-29

Last updated

2026-09-15

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

Conditions

Space Maintenance

Keywords

nance spacemaintainer, TPA appliance

Brief summary

To compare the effect of digital fabricated Nance and transpalatal arch appliances versus conventional fabricated Nance and transpalatal arch appliances.

Detailed description

measuring arch parameters: arch perimeter, anterior segment perimeter, maxillary width, anterior segment length, right molar rotation angle, left molar rotation angle, palatal vault depth

Interventions

DEVICEdigital fabricated nance appliance

digital fabricated space maintainers

DEVICEdigital TPA appliance

digital fabricated space maintainer

DEVICEconventional nance appliance

conventional fabricated nance appliance

DEVICEconventional TPA appliance

conventional fabricated TPA space maintainer

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

8 Years to 9 Years

Healthy volunteers

Yes

Inclusion criteria

* Healthy children aged 8-9 years * Bilateral, prematurely extracted maxillary primary molars within a period not more than one month were selected. * Fully erupted maxillary permanent first molars. * Angle's class I occlusion. * Adequate space for premolar eruption according to Moyer's arch length analysis.

Exclusion criteria

* Children with congenitally absent permanent successors. * Children with successors not covered by bone. * Children with successors with two-thirds or more of their roots formed.

Design outcomes

Primary

Measure	Time frame	Description
arch parameters	3 months	arch perimeter will be measured by 3d slicer software for digital prefabricated appliance and conventional fabricated appliance for both nance and TPA

Secondary

Measure	Time frame	Description
arch width	3 months	arch width will be measured by 3d slicer software for digital prefabricated appliance and conventional fabricated appliance for both nance and TPA

Countries

Egypt

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 16, 2026