Do Hall Technique Crowns Affect Intra-arch Dimensions? A Split-mouth Quasi-experimental Non-randomized Feasibility Pilot Study

Overview

Journal Int J Clin Pediatr Dent

Specialty Pediatrics

Date 2024 Oct 11

PMID 39391144

Authors

Batoul AlRamzi

Manal AlHalabi

Mawlood Kowash

Anas Salami

Amar H Khamis

Ahmed Ghoneima

Iyad Hussein

Affiliations

Soon will be listed here.

Abstract

Aim And Background: The Hall technique preformed metal crowns (HT-PMCs) are allegedly oversized, temporarily altering inter-arch relationships. Intra-arch dimensions and leeway space (LWS) HT effects are unknown.

Aim: To study single HT-PMC intra-arch effects and treated tooth dimensional changes.

Materials And Methods: Split-mouth, quasi-experimental, non-randomized feasibility pilot study. Intraoral scans (iTero II®) were taken preorthodontic separator placement (scan), immediately post single HT-PMCs (scan) in 13 children, and 1 month later (scan) in eight children. Control and study quadrants' lengths ("arcs") and HT-PMCs/control tooth dimensions [mesiodistal (MD), buccopalatal/lingual (BP/L), diagonal (Diag1/Diag2)] were recorded in mm (OrthoCAD® software). Paired -test, repeated analysis of variance (ANOVA) analysis statistics ( < 0.05).

Results: Compared to scan, the mean study arc increased by 0.7 mm (±0.5) ( = 13, -test, < 0.001) at scan, while at scan, it increased by 0.8 mm (±0.34) ( = 8, repeated ANOVA, = 0.008). The HT-PMCs-treated tooth mean dimensions increased at scan by 0.9 mm (MD), 0.8 mm (BP/L), 0.5 mm (Diag1), and 0.7 mm (Diag2) (-test, < 0.001) with similar observations at scan. There were no significant changes in the control arc or the control tooth measurements.

Conclusion: One single HT-PMC increased the intra-arch quadrant length by approximately up to <1 mm. The HT-PMC-treated tooth was marginally oversized. This pilot study paves the way for a more robust study with a larger sample size.

How To Cite This Article: AlRamzi B, AlHalabi M, Kowash M, Do Hall Technique Crowns Affect Intra-arch Dimensions? A Split-mouth Quasi-experimental Non-randomized Feasibility Pilot Study. Int J Clin Pediatr Dent 2024;17(6):673-682.

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