Comparative Evaluation of Tensile Bond Strength of Two Soft Liners Bonded to Heat-Cured and 3D-Printed Denture Base Materials

Document Type : Original Article

Authors

1 Lecturer, Removable Prosthodontic Department, Faculty of Dental Medicine, Al-Azhar University

2 Assistant Professor and Head of Dental Biomaterials Department. Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt

3 Lecturer at Dental Biomaterials Department, Faculty of Dental Medicine for Girls Al Azhar University

4 Lecturer at Removable Prosthodontic Department, Faculty of Oral and Dental Medicine, Badr University, Cairo, Egypt.

Abstract

The study was conducted to evaluate the tensile bond strength between acrylic-based and silicon-based denture liners bonded to conventional heat-cured PMMA and 3D-printed denture base materials. Materials and Methods: A total of forty dumbbell-shaped specimens were fabricated for the test of tensile bond strength with dimensions 75 mm in length, 12mm in diameter at its thickest portion, and 7 mm at its thinnest section. The specimens were divided into two equal groups (n=20) depending on the denture base material (conventional heat-cured PMMA and 3D- printed) and each group was subdivided into two subgroups (n =10) depending on the material of soft liner bonded to it, subgroup A: Acrylic-based soft liner and subgroup B: Silicon-based soft liner. Results: The silicon-based soft liner bonded to conventional PMMA recorded the highest tensile bond strength while the least value for bond strength mean was recorded by the acrylic-based liner bonded to the 3D-printed denture resin. Conclusion: The silicon-based soft liner showed greater bond strength to conventional PMMA and 3D-printed denture bases than the acrylic-based soft liner.

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Egyptian Dental Journal
Volume 69, Issue 4 - Serial Number 4
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
October 2023
Pages 2999-3006

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