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OpenTrials
Active, Not Recruiting

NCT Number: NCT07593378

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

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

Active, Not Recruiting

This study is active but is not currently recruiting participants.

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Key information

Conditions

Space Maintenance

Age range

8 year–9 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Pharos Univeristy in Alexandria

Alexandria, Egypt

About this study

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

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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.

Treatment and study plan

digital fabricated nance appliance

Device

digital fabricated space maintainers

digital TPA appliance

Device

digital fabricated space maintainer

conventional nance appliance

Device

conventional fabricated nance appliance

conventional TPA appliance

Device

conventional fabricated TPA space maintainer

Primary outcomes

  1. arch parameters

    Time frame: 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 outcomes

  1. arch width

    Time frame: 3 months

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

Sponsors and collaborators

Lead sponsor

Pharos University in Alexandria

Other

Registry information

Acronym: TPA

Important dates

Study start
2025
Primary completion
2025
Study completion
2026
First posted
May 18, 2026
Registry last updated
Jul 10, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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