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Updated: Jun 26, 2026

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Published on: February 23, 2024

Longitudinal Changes in Occlusal Outcomes and Case Complexity with Invisalign^® First in Early Mixed Dentition.

Teresa Pinho^1,2, Martim Novais¹, Maria Dos Prazeres Gonçalves^3,4

¹UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Science (IUCS-CESPU), 4585-116 Gandra, Portugal.

Dentistry Journal

|June 25, 2026

Summary

Related Concept Videos

Teeth

Teeth

The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...

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Interceptive orthodontic treatment using Invisalign® First effectively reduced malocclusion complexity in growing children. Occlusal outcomes were maintained long-term, demonstrating the treatment

Area of Science:

Orthodontics
Pediatric Dentistry
Dental Technology

Background:

Interceptive orthodontic treatment during mixed dentition aims to simplify malocclusions.
Evidence on the longitudinal outcomes of Invisalign® First for Phase I therapy is limited.
This study evaluates long-term occlusal changes and complexity in moderate-to-severe malocclusions.

Purpose of the Study:

To describe longitudinal changes in occlusal outcomes using standardized indices.
To assess case complexity reduction in children treated with Invisalign® First.
To evaluate the maintenance of occlusal results during the transition to permanent dentition.

Main Methods:

Retrospective analysis of 55 patients treated with Invisalign® First in early mixed dentition.

Keywords:

Invisalign® First PAR index clear aligner therapy interceptive orthodontic treatment mixed dentition occlusal outcomes

Related Experiment Videos

Last Updated: Jun 26, 2026

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Published on: February 23, 2024

Longitudinal assessment of occlusal outcomes using the Peer Assessment Rating (PAR) Index at baseline, post-treatment, and follow-up.

Cephalometric analysis of a subsample to evaluate mixed dentition complexity using an adapted framework.

Main Results:

Median PAR scores significantly decreased from baseline to post-treatment and were maintained at follow-up.
Global complexity reduction averaged 79.49% in the cephalometric subsample.
High correction rates (>85%) were observed for dentoalveolar objectives, posterior crossbite, and open bite.

Conclusions:

Invisalign® First demonstrated longitudinal reductions in occlusal complexity and high dentoalveolar correction rates.
Occlusal outcomes were maintained during the follow-up period as patients transitioned dentition.
Findings provide descriptive longitudinal observations in a non-controlled design.