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

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.

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

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.