Comparison of shear bond strengths of different types of denture teeth to different denture base resins
Prpic Vladimir, Schauperl Zdravko, Glavina Domagoj, Catic Amir, Cimic Samir,
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( Prpic Vladimir ) - University of Zagreb School of Dental Medicine
( Schauperl Zdravko ) - University of Zagreb Faculty of Mechanical Engineering and Naval Architecture Department of Materials
( Glavina Domagoj ) - University of Zagreb School of Dental Medicine Department of Pediatric and Preventive Dentistry
( Catic Amir ) - University of Zagreb School of Dental Medicine Department of Prosthodontics
( Cimic Samir ) - University of Zagreb School of Dental Medicine Department of Prosthodontics
Abstract
PURPOSE: 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.
MATERIALS AND METHODS: 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).
RESULTS: 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 (P<.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.
CONCLUSION: 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.
키워드
Complete denture; Digital denture; Acrylics; Prefabricated teeth
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