Influence of hydrophobic layer of Bis-EMA with different ethoxilations on adhesive's bonding efficacy and mechanical properties

Silva, Julianne Coelho; Moreira, Maria Mônica Studart Mendes; Nobre, Caio Felipe de Almeida; Neto, Vitaliano Gomes Araújo; Lomonaco, Diego; Feitosa, Victor Pinheiro

doi:10.1016/j.ijadhadh.2020.102796

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…The resins containing –OH groups exhibited higher water absorption values. The absence of a hydroxyl group in the ethoxylated monomer (Bis-EMA) results in reduced water absorption [ 40 , 41 , 42 ]. Therefore, the B100 resin showed a low absorption value.…”

Section: Resultsmentioning

confidence: 99%

Development of Bisphenol-A-Glycidyl-Methacrylate- and Trimethylolpropane-Triacrylate-Based Stereolithography 3D Printing Materials

et al. 2022

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The main advantages of the three-dimensional (3D) printing process are flexible design, rapid prototyping, multi-component structures, and minimal waste. For stereolithography (SLA) 3D printing, common photocurable polymers, such as bisphenol-A glycidyl methacrylate (Bis-EMA), trimethylolpropane triacrylate (TMPTMA), as well as urethane oligomers, have been widely used. For a successful 3D printing process, these photocurable polymers must satisfy several requirements, including transparency, a low viscosity, good mechanical strength, and low shrinkage post-ultraviolet curing process. Herein, we investigated SLA-type photocurable resins prepared using Bis-EMA, TMPTMA, and urethane oligomers. The flexural strength, hardness, conversion rate, output resolution, water absorption, and solubility of the printed materials were investigated. The degree of conversion of the printed specimens measured by infrared spectroscopy ranged from 30 to 60%. We also observed that 64–80 MPa of the flexural strength, 40–60 HV of the surface hardness, 15.6–29.1 MPa of the compression strength, and 3.3–14.5 MPa of the tensile strength. The output resolution was tested using three different structures comprising a series of columns (5–50 mm), circles (0.6–6 mm), and lines (0.2–5 mm). In addition, we used five different pigments to create colored resins and successfully printed complex models of the Eiffel Tower. The research on resins, according to the characteristics of these materials, will help in the design of new materials. These results suggests that acrylate-based resins have the potential for 3D printing.

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Section: Resultsmentioning

confidence: 99%

Development of Bisphenol-A-Glycidyl-Methacrylate- and Trimethylolpropane-Triacrylate-Based Stereolithography 3D Printing Materials

et al. 2022

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“…Bis-EMA is a dimethacrylate analog to bis-GMA in which the hydroxyl functionalities in the molecular structure are replaced by ethoxy groups (-O-CH 2 CH 3 ) and is pronounced as a class of monomers with several ethoxylations in the chain. The higher the number of ethoxylations, the larger the molecule and the greater the hydrophilicity (31). The monomer content of the 3D resin composite FDPs may result in less surface degradation in the long term due to the hydrophobic nature of the restoration, and the higher conversion degree of the resin composite that may cause less plaque accumulation.…”

Section: Discussionmentioning

confidence: 99%

3D-printed resin composite posterior fixed dental prosthesis: a prospective clinical trial up to 1 year

Hobbi,

Ordueri,

Öztürk-Bozkurt

et al. 2024

Front. Dent. Med

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ObjectivesThis clinical trial evaluated the clinical behavior of 3D-printed posterior resin composite fixed dental prostheses (FDPs).Materials and methodsBetween 10 October 2020 and 5 August 2022, 49 patients aged 19–60 years (16 men, 33 women) received 68 3D-printed resin composite 3-unit posterior FDPs (ELS Even Stronger, Saremco, Switzerland). FDPs were followed up 2 weeks after placement (baseline), 6 months after placement, and 1 year after placement by two independent calibrated observers using modified FDI criteria for anatomical form, secondary caries, marginal adaptation, surface roughness, color match, fracture of material, staining surface, staining margin, approximate anatomical form, retention, gingival health, and patient's view. Survival analyses were performed using Kaplan–Meier analyses.ResultsA total of 59 restorations were evaluated and the mean observation period was 8.63 months. Failure types were categorized as mechanical and biological. Failures were observed in 14 FDPs. Nine FDPs showed mechanical failure and five FDPs showed biological failure. Mechanical failures were mostly experienced as connector fractures. Eight FDPs showed cohesive fractures (seven in a single connector at either at the mesial or distal and one in the pontic itself). Biological failures, including root canal treatment and gingival tissue reactions, were observed within the first 6 months. Based on mechanical failures, the survival rate was 86.7% including the biological complications; this corresponded to 71.6% (Kaplan–Meier). After 1 year, two FDPs showed surface luster loss (score 4), two-color mismatches (score 4), and two-surface staining (score 4).Conclusion3D-printed resin composite FDPs were observed acceptable after 1 year of clinical follow-up, providing that the experienced failure types were mainly associated with fractures in the connector region, which requires revision of design parameters.Clinical Trial RegistrationClinical Trials.Gov, NCT04600297.

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“…The higher number of ethoxylations, the larger is the molecule and greater is the hydrophilicity. 42 The monomer content of the 3D resin composite FDPs may result in less surface degradation in the long term due to hydrophobic nature of the restoration, and the higher conversion degree of the resin composite that may cause less plaque accumulation.…”

Section: Discussionmentioning

confidence: 99%

3D printed resin composite posterior fixed dental prosthesis: A prospective clinical trial up to 1 year

Ordueri,

Hobbi,

Öztürk-Bozkurt

et al. 2023

Preprint

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Objectives: This clinical trial evaluated the clinical behaviour of 3D printed posterior resin composite fixed dental prosthesis restorations. Materials and Methods: Between 10.10.2020 - 05.08.2022, forty-nine patients aged between 19 and 60 years old (33 females, 16 males) received 68 3D printed resin composite 3-unit posterior fixed dental prosthesis (ELS Even Stronger, Saremco, Switzerland). FDPs were followed up 2 weeks after placement (baseline) by two independent calibrated observers using modified FDI criteria. Results: Fifty-two FDPs completed their 6 months, 23 and 1of the resin composite FDPs their 1 and 2- year follow-up, respectively. Mean observation period was 8.63 months. Failure types were categorized as mechanical and biological ones. At the end of these observation periods, 8 FDPs showed cohesive fractures. Three abutment teeth needed endodontic treatment, 2 periodontal problems. One FDP was rebonded due to retention failure. After one year, 2 FDPs showed surface lusture loss (Score 4), 2 colour mismatch (Score 4), 2-surface staining (Score 4). Based on mechanical failures, survival rate was 86.7% while including the biological complications, this corresponded to 71.6% (Kaplan-Meier). Conclusion: Long-term follow-up of the present cohort will indicate whether the tested material may serve as long-term provisional or even as permanent material for three-unit FDPs. Clinical Relevance: Resin composite with improved properties could be preferred for permanent prosthetic applications rather than temporary approaches with current 3D technology and CAD / CAM applications. Clinical Trial Registration Number: NCT04600297

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Influence of hydrophobic layer of Bis-EMA with different ethoxilations on adhesive's bonding efficacy and mechanical properties

Cited by 7 publications

References 21 publications

Development of Bisphenol-A-Glycidyl-Methacrylate- and Trimethylolpropane-Triacrylate-Based Stereolithography 3D Printing Materials

Development of Bisphenol-A-Glycidyl-Methacrylate- and Trimethylolpropane-Triacrylate-Based Stereolithography 3D Printing Materials

3D-printed resin composite posterior fixed dental prosthesis: a prospective clinical trial up to 1 year

3D printed resin composite posterior fixed dental prosthesis: A prospective clinical trial up to 1 year

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