Banca de DEFESA: LAURA BARROS ALVES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LAURA BARROS ALVES
DATE: 18/03/2025
TIME: 08:00
LOCAL: Plataforma Teams
TITLE:

Influence of Storage Conditions on the Dimensional Stability of Alginate Molds Evaluated by 3D Scanning at Different Time Intervals

KEY WORDS:

Keywords: Alginates, Dental Impression Materials, Dimensional Measurement Accuracy, Dental Impression Technique 

PAGES: 100
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUMMARY:

“Study models play a crucial role in dentistry, aiding in the planning and diagnosis of clinical cases by allowing the analysis of occlusion and oral structures without the patient's presence. Alginate is widely used for dental impressions due to its practicality, affordability, and ability to reproduce fine details. However, its dimensional stability is influenced by factors such as time, temperature, humidity, and storage conditions, which may compromise the accuracy of the resulting models. This study aimed to evaluate the dimensional stability of alginate impressions from different brands under three distinct storage conditions. A three-dimensional model was created using Blender software and subsequently printed with Dental Model resin. Impressions were taken using four alginate brands (Avagel, Jeltrate Chromatic, Jeltrate Plus, and Hydrogum 5), following the manufacturers' guidelines for powder-to-water ratio and handling time. Impressions were then divided into three storage groups: a closed box with controlled humidity, on the workbench, and on the workbench covered with moistened paper. Dimensional stability was assessed through digital scanning at multiple time intervals: 15min, 30min, 1h, 24h, 48h, 72h, 96h, 120h, 144h, and 168h, using a benchtop scanner and CloudCompare software. The results demonstrated that storage conditions significantly affect the dimensional stability of alginate impressions. Storage in a closed box with controlled humidity resulted in the least dimensional variation over time. In contrast, impressions stored on the open workbench exhibited greater changes, particularly in the group without moistened paper. While moistened paper delayed shrinkage, it did not entirely prevent dimensional alterations over time. In conclusion, storing alginate impressions in a closed, humidity-controlled environment until pouring is the most effective strategy to minimize dimensional changes, ensuring greater accuracy in dental study models.” 

COMMITTEE MEMBERS:
Externa à Instituição - ERICA ALVES GOMES - UNAERP
Interna - 3493627 - FERNANDA CRISTINA PIMENTEL GARCIA
Interna - 1877052 - LILIANA VICENTE MELO DE LUCAS REZENDE
Presidente - 1843167 - LUCAS FERNANDO TABATA