Evaluación de la continuidad de la línea terminal en preparación de coronas por los estudiantes de odontología de la UCSG en el semestre a 2025.

Abstract

Introduction: Preclinical fixed prosthodontics is a key subject in dental education, as it develops essential skills for crown preparation. The clinical success of these restorations depends on parameters such as tooth reduction, finish line, and taper. This study aimed to evaluate the continuity of the finish line in crown preparations performed by dentistry students at the Universidad Católica de Santiago de Guayaquil (UCSG) during the A 2025 semester. Methods: A cross-sectional, descriptive, and observational study was conducted with 34 students enrolled in the preclinical fixed prosthodontics course. Each student prepared two typodont teeth. Data on the use of magnification loupes and type of bur were collected through a Google Forms survey, while finish line and surface irregularities were assessed with a dental scanner. Results: Most students (67.65%) reported not using magnification loupes, which may limit accuracy. The coarse-grit round-end tapered bur was the most frequently used for both anterior and posterior teeth. Finish lines were within clinically acceptable parameters, while proximal surfaces, particularly the distal, showed the highest irregularities. Conclusion: Student crown preparations were clinically acceptable; however, greater precision and technical refinement are needed to optimize outcomes in fixed prosthodontics.