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Published on: February 23, 2024
Predictive model of third molar eruption after second molar extraction.
Cristina De-la-Rosa-Gay1, Eduard Valmaseda-Castellón, Cosme Gay-Escoda
1Department of Orthodontics; researcher, Bellvitge Institute of Biomedical Research, Barcelona, Spain.
Summary
Predictive models can forecast third molar eruption after second molar extraction in orthodontic patients. These models use initial angle, jaw, sex, age, and developmental stage for accurate prognosis.
Area of Science:
- Dentistry
- Orthodontics
- Oral Surgery
Background:
- Second permanent molar extraction is a common orthodontic space-gaining technique.
- Limited data exists on the eruption prognosis of adjacent third molars following this procedure.
Purpose of the Study:
- To develop and validate predictive models for third molar eruption after second permanent molar extraction.
- To identify key factors influencing third molar angulation and eruption success.
Main Methods:
- A cohort of 48 orthodontic patients (ages 11-23) with 128 extracted second permanent molars was retrospectively analyzed.
- Longitudinal follow-up data until complete third molar eruption was collected.
- Linear and logistic regression models were employed for prediction.
Main Results:
- A linear regression model accurately predicted the final angulation of third molars relative to first molars.
- Predictive variables included initial angulation, jaw, and third molar developmental stage.
- A logistic regression model successfully predicted the probability of correct third molar eruption.
Conclusions:
- Predictive models incorporating initial angle, jaw, sex, age, and developmental stage can forecast third molar eruption outcomes.
- These models aid in managing orthodontic treatment involving second molar extraction and third molar development.
