Immediate and Long-Term Pull-Out Bond Strength of 3D-Printed Provisional Crowns

• Published in: BioMed research international Vol. 2024; no. 1; p. 7205011
• Main Authors: Dos S Siqueira, Joyce R C, Rodriguez, Rita M M, de C Ramos, Nathalia, Bottino, Marco A, Tribst, João P M
• Format: Journal Article
• Language: English
• Published: United States Hindawi Limited 2024; Wiley
• Subjects: 3-D printers; Aging; Bonding strength; Calcium hydroxide; Calcium oxide; Cement; Crowns; Dental Bonding - methods; Dental Cements - chemistry; Dental crowns; Design; Eugenol; Finite Element Analysis; Glass Ionomer Cements - chemistry; Humans; Ionomers; Manufacturing; Materials Testing; Mechanical properties; Modulus of elasticity; Polymerization; Printing, Three-Dimensional; Prostheses; Reagents; Resins; Retention; Slaked lime; Software; Tensile Strength; Three dimensional printing; Transplants & implants; Zinc oxide; Zinc oxides; Brazil; United States > US; North America
• ISSN: 2314-6133; 2314-6141; 2314-6141
• DOI: 10.1155/2024/7205011

Over the past decade, 3D printing technology has revolutionized various fields, including dentistry. Provisional restorations play a crucial role in prosthetic rehabilitation, necessitating the evaluation of their bond strength with different provisional cement agents. This study is aimed at assessing the immediate and long-term bond strength of 3D-printed dental crowns using three provisional cement agents. Provisional crowns ( = 36) were manufactured using 3D modeling software and cemented in dentin analogues (G10 Nema resin). After the crowns' fabrication, they were randomly divided into three groups ( = 12) for cementation with Relyx Temp 3M ESPE, Provicol-VOCO, and Meron-VOCO. Tensile strength tests were conducted using a universal testing machine, with half of the specimens subjected to 2000 thermal cycles before testing. Finite element analysis was employed to assess tensile stress distribution. Statistical analysis (two-way ANOVA and Tukey's test at a 95% confidence level) revealed significant effects of cement type ( = 0.006) and thermal aging ( = 0.001) on bond strength. Glass ionomer cement exhibited the highest immediate resistance, while all types of cement were adversely affected by thermal aging, resulting in decreased bond strength. Thermal aging significantly alters the properties of 3D printing resin and affects the bond strength of provisional cement with 3D-printed crowns. Despite the adverse effects of thermal aging, glass ionomer cement demonstrated the highest immediate resistance. Clinicians should carefully consider these findings when selecting provisional cements for 3D-printed crowns.