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Cross-sectional validation of a preoperative multidimensional assessment tool for third molar extraction using
A Sánchez-Torres1, X Arias-Huerta, B Pérez-Iglesias
1Faculty of Medicine and Health Sciences Bellvitge Campus. University of Barcelona C/ Feixa Llarga, s/n; Pavelló Govern, 2nd floor Despatx 2.9. 08907 - L'Hospitalet de Llobregat Barcelona, Spain ruibarbosa@ub.edu.
Medicina Oral, Patologia Oral Y Cirugia Bucal
|April 19, 2026
Summary
A new preoperative assessment form accurately predicts third molar extraction difficulty, correlating with surgery time, surgeon perception, and complications. Machine learning models show promise for predicting surgical duration.
Area of Science:
- Oral Surgery
- Dental Diagnostics
Background:
- Third molar extractions present variable surgical complexity.
- Accurate preoperative difficulty assessment is crucial for surgical planning and patient outcomes.
Purpose of the Study:
- To evaluate a preoperative difficulty assessment form for third molar extractions.
- To determine the form's correlation with surgery time, perceived difficulty, surgical technique, and postoperative complications.
- To explore the utility of machine learning models in predicting surgical outcomes.
Main Methods:
- A cross-sectional study involving 205 patients undergoing third molar extraction.
- Utilized a validated preoperative difficulty evaluation form assessing clinical, radiological, and surgical variables.
- Employed descriptive, bivariate analyses, and machine learning models for outcome prediction.
Main Results:
- The form's global score significantly correlated with surgery time (rho=0.640, P<0.001) and perceived difficulty (rho=0.395, P<0.001).
- Higher scores were associated with specific surgical techniques (P<0.001) and increased postoperative complications (P=0.012).
- Machine learning models demonstrated superior performance in predicting surgery time compared to perceived difficulty.
Conclusions:
- The preoperative assessment form is a reliable tool for estimating third molar extraction difficulty.
- The form's global score effectively predicts surgery duration, complexity, and potential complications.
- Machine learning offers a promising avenue for enhancing predictive accuracy in oral surgery planning.

