Effect of surface treatment methods on the shear bond strength of auto-polymerized resin to thermoplastic denture base polymer

Abstract

PURPOSEPolyamide polymers do not provide sufficient bond strength to auto-polymerized resins for repairing fractured denture or replacing dislodged denture teeth. Limited treatment methods have been developed to improve the bond strength between auto-polymerized reline resins and polyamide denture base materials. The objective of the present study was to evaluate the effect of surface modification by acetic acid on surface characteristics and bond strength of reline resin to polyamide denture base.MATERIALS AND METHODS84 polyamide specimens were divided into three surface treatment groups (n=28): control (N), silica-coated (S), and acid-treated (A). Two different auto-polymerized reline resins GC and Triplex resins were bonded to the samples (subgroups T and G, respectively, n=14). The specimens were subjected to shear bond strength test after they were stored in distilled water for 1 week and thermo-cycled for 5000 cycles. Data were analyzed with independent t-test, two-way analysis of variance (ANOVA), and Tukey's post hoc multiple comparison test (α=.05).RESULTSThe bond strength values of A and S were significantly higher than those of N (P<.001 for both). However, statistically significant difference was not observed between group A and group S. According to the independent Student's t-test, the shear bond strength values of AT were significantly higher than those of AG (P<.001).CONCLUSIONThe surface treatment of polyamide denture base materials with acetic acid may be an efficient and cost-effective method for increasing the shear bond strength to auto-polymerized reline resin.

Nonthermal plasma on the shear bond strength of relining resin to thermoplastic denture base resin

“…3 Therefore, the bond strength of the TDBR's may be affected if used clinically and surface modification is necessary to enhance the bond strength between the thermoplastic denture base resin and relining resin. Several studies showed that the use of silica coating, 12,18 acetic acid, 9 and tribochemical silica coating combined with 4-methacryloyloxyethy trimellitate anhydride (4-META)/ methyl methacrylate (MMA) -tributylborane (TBB) 3 can improve the strength between denture bases. Although there were many attempts to improve the adhesive properties of denture base resin, limited research has been focused on thermoplastic denture base resin material.…”

“…1,9-11 Therefore, it does not provide sufflcient bond strength to autopolymerized resins for repairing fractured dentures or replacing dislodged teeth. 9,10,12 Plasma treatment has been used to modify the surface of products in the industrial world. 13 Nonthermal plasma (NTP) treatment is made of partially ionized gas with ions, electrons, and uncharged particles such as atoms, molecules, and radicals.…”

“…9 The application of chairside autopolymerizing resins seems to have increased because direct relining is more convenient and faster than indirect laboratory processed relining. 3 However, thermoplastic denture base resins have high chemical resistance due to its high degree of crystallinity causing difflculty in the penetration of monomer molecules and other resin primers into https: //doi.org/10.4047/jkap.2018.56.3.199 Purpose: This study evaluated the effect of nonthermal plasma treatment on the bond strength of autopolymerizing relining resin to the injection molded thermoplastic denture base resins (TDBRs) with different surface treatments.…”

Influence of Various Chemical Surface Treatments, Repair Materials, and Techniques on Transverse Strength of Thermoplastic Nylon Denture Base

“…Regarding the curing technique and resin materials, different samples from each group were scratched and attenuated for total reflection Fourier transform infrared spectroscopy analysis (ATR-FTIR tensor 27, Bruker, Germany) to detect the component of chemical functional groups formed on the surface of the polyamide nylon base and poly(methyl-methacrylate) (PMMA) repair materials which were processed by different polymerization techniques. The infrared spectra of the experimental samples were recorded in the region 400–4000 cm −1 at a spectral resolution of 4 cm −1 [ 23 ].…”

“…Koodaryan and Hafezeqoran [ 23 ] revealed that the surface treatment of polyamide denture base with 5% acetic acid in aqueous ethanol (30/70 by volume) for 10 minutes may be an efficient and cost-effective method for increasing the shear bond strength to the autopolymerized reline resin.…”