A1 Refereed original research article in a scientific journal
Shear bond strength of ultraviolet-polymerized resin to 3D-printed denture materials: Effects of post-polymerization, surface treatments, and thermocycling
Authors: Tanaka, Ami; Kawaguchi, Tomohiro; Ito, Ayaka; Isshi, Kota; Hamanaka, Ippei; Tsuzuki, Takashi
Publisher: JAPAN PROSTHODONTIC SOC
Publishing place: TOKYO
Publication year: 2024
Journal: Journal of Prosthodontic Research
Journal name in source: JOURNAL OF PROSTHODONTIC RESEARCH
Journal acronym: J PROSTHODONT RES
Number of pages: 9
ISSN: 1883-1958
eISSN: 2212-4632
DOI: https://doi.org/10.2186/jpr.JPR_D_23_00321
Publication's open availability at the time of reporting: Open Access
Publication channel's open availability : Partially Open Access publication channel
Web address : https://doi.org/10.2186/jpr.JPR_D_23_00321
Purpose: The purpose of this study is to compare the shear bond strength of ultraviolet (UV) -polymerized resin to 3Dprinted denture materials, both with and without post -polymerization. Moreover, the effects of surface treatment and thermocycling on shear bond strength after post -polymerization were investigated. Methods: Cylindrical 3D -printed denture bases and teeth specimens were prepared. The specimens are subjected to two tests. For Test 1, the specimens were bonded without any surface treatment or thermal stress for comparison with and without post -polymerization. In Test 2, specimens underwent five surface treatments: untreated (CON), ethyl acetate (EA), airborne particle abrasion (APA) with 50 mu m (50-APA) and 110 mu m alumina (110-APA), and tribochemical silica coating (TSC). A UV -polymerized resin was used for bonding. Half of the Test 2 specimens were thermocycled for 10,000 cycles. Shear bond strength was measured and analyzed using Kruskal-Wallis and Steel-Dwass tests (n = 8). Results: In Test 1, post -polymerization significantly reduced shear bond strength of both 3D -printed denture materials (P < 0.05). No notable difference was observed between the denture teeth and the bases (P > 0.05). In Test 2, before thermocycling, the CON and EA groups exhibited low bond strengths, while the 50-APA, 110-APA, and TSC groups exhibited higher bond strengths. Thermocycling did not reduce bond strength in the latter groups, but significantly reduced bond strength in the EA group (P < 0.001). Conclusions: Post -polymerization can significantly reduce the shear bond strength of 3D -printed denture materials. Surface treatments, particularly APA and TSC, maintained bond strength even after thermocycling.
