Comparison of shear bond strengths of different types of denture teeth to different denture base resins

• Published in: The journal of advanced prosthodontics Vol. 12; no. 6; pp. 376 - 382
• Main Authors: Prpić, Vladimir, Schauperl, Zdravko, Glavina, Domagoj, Ćatić, Amir, Čimić, Samir
• Format: Journal Article
• Language: English
• Published: Korea (South) The Korean Academy of Prosthodontics 01-12-2020; 대한치과보철학회
• Subjects: Original; 치의학; Prefabricated teeth; Digital denture; Complete denture; Acrylics
• ISSN: 2005-7806; 2005-7814
• DOI: 10.4047/jap.2020.12.6.376

To determine the shear bond strengths of different denture base resins to different types of prefabricated teeth (acrylic, nanohybrid composite, and cross-linked) and denture teeth produced by computer-aided design/computer-aided manufacturing (CAD/CAM) technology.
Prefabricated teeth and CAD/CAM (milled) denture teeth were divided into 10 groups and bonded to different denture base materials. Groups 1-3 comprised of different types of prefabricated teeth and cold-polymerized denture base resin; groups 4-6 comprised of different types of prefabricated teeth and heat-polymerized denture base resin; groups 7-9 comprised of different types of prefabricated teeth and CAD/CAM (milled) denture base resin; and group 10 comprised of milled denture teeth produced by CAD/CAM technology and CAD/CAM (milled) denture base resin. A universal testing machine was used to evaluate the shear bond strength for all specimens. One-way ANOVA and Tukey post-hoc test were used for analyzing the data (α=.05).
The shear bond strengths of different groups ranged from 3.37 ± 2.14 MPa to 18.10 ± 2.68 MPa. Statistical analysis showed significant differences among the tested groups (
<.0001). Among different polymerization methods, the lowest values were determined in cold-polymerized resin.There was no significant difference between the shear bond strength values of heat-polymerized and CAD/CAM (milled) denture base resins.
Different combinations of materials for removable denture base and denture teeth can affect their bond strength. Cold-polymerized resin should be avoided for attaching prefabricated teeth to a denture base. CAD/CAM (milled) and heat-polymerized denture base resins bonded to different types of prefabricated teeth show similar shear bond strength values.