Accuracy in Mixed Dentition Arch Length Discrepancy Prediction Methods in Surabayan Children

Accurate space evaluation in malocclusion using arch length discrepancy (ALD) analysis is essential for effective orthodontic interceptive treatment during the mixed dentition (MD) phase and growth and development stage (GDS). The study aimed to analyze ALD using the Sitepu, Moyers, and Tanaka- Johnston methods and also the ALD measurement technique (brass wire and segmentation technique) in Surabayan children with Angle's Class I malocclusion during the MD and GDS.A total of 60 study models of Javanese children during MD and GDS at the Dental Hospital of Airlangga University were used based on the inclusion criteria. Cervical vertebral maturation stage was used to determine the GDS. Lateral cephalometry was investigated with Steiner's analysis < A point-nasion-B point to determine the skeletal malocclusion. ALD analysis was conducted based on the Moyers, Sitepu, and Tanaka-Johnston methods.There was significant difference in ALD for the maxillary arch (<i>p</i> < 0.05), while no significant difference was found in the mandibular arch (<i>p</i> > 0.05). There were significant differences between the Moyers and Sitepu methods in the maxillary arch (<i>p</i> < 0.05), but no significant difference between the Moyers and Tanaka-Johnston or Sitepu and Tanaka-Johnston methods (<i>p</i> > 0.05). There was a significant difference between the Moyers segmented and brass wire methods in the maxilla (<i>p</i> < 0.05), with no significant difference in the mandible (<i>p</i> > 0.05).The results of this MD and GDS study showed there were statistically significant differences in ALD among the Moyers, Sitepu, and Tanaka-Johnston methods for the maxilla, but not the mandibular arches.