scholarly journals An Evaluation of the Properties of Urethane Dimethacrylate-Based Dental Resins

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2727
Author(s):  
Agata Szczesio-Wlodarczyk ◽  
Monika Domarecka ◽  
Karolina Kopacz ◽  
Jerzy Sokolowski ◽  
Kinga Bociong
Keyword(s):  
Bisphenol A ◽  
Glycidyl Methacrylate ◽  
Polymer Network ◽  
Dental Materials ◽  
Materials Properties ◽  
Dental Resins ◽  
Compositional Changes ◽  
Urethane Dimethacrylate ◽  
Triethyleneglycol Dimethacrylate ◽  
Diametral Tensile Strength

Most of the dental materials available on the market are still based on traditional monomers such as bisphenol A-glycidyl methacrylate (Bis-GMA), urethane dimethacrylate (UDMA), triethyleneglycol dimethacrylate (TEGDMA), and ethoxylated bisphenol-A dimethacrylate (Bis-EMA). The interactions that arise in the monomer mixture and the characteristics of the resulting polymer network are the most important factors, which define the final properties of dental materials. The use of three different monomers in proper proportions may create a strong polymer matrix. In this paper, fourteen resin materials, based on urethane dimethacrylate with different co-monomers such as Bis-GMA or Bis-EMA, were evaluated. TEGDMA was used as the diluting monomer. The flexural strength (FS), diametral tensile strength (DTS), and hardness (HV) were determined. The impacts of material composition on the water absorption and dissolution were evaluated as well. The highest FS was 89.5 MPa, while the lowest was 69.7 MPa. The median DTS for the tested materials was found to range from 20 to 30 MPa. The hardness of the tested materials ranged from 14 to 16 HV. UDMA/TEGDMA matrices were characterized by the highest adsorption values. The overall results indicated that changes in the materials’ properties are not strictly proportional to the material’s compositional changes. The matrices showed good properties when the composite contained an equal mixture of Bis-GMA/Bis-EMA and UDMA or the content of the UDMA monomer was higher.

Preparation of a novel anti shrinking agent (SOC DA) and its evaluation in dental resins

2013 ◽  
Vol 1609 ◽  
Author(s):  
Ricardo Acosta Ortiz ◽  
Luis Alberto Reyna Medina ◽  
María Lydia Berlanga Duarte ◽  
Aida Esmeralda Garcia Valdez
Keyword(s):  
Dental Materials ◽  
Acrylic Resin ◽  
Dental Composite ◽  
Molar Ratio ◽  
Dental Resin ◽  
Dental Resins ◽  
Acrylic Monomers ◽  
Urethane Dimethacrylate ◽  
Acrylate Monomers ◽  
Triethyleneglycol Dimethacrylate

AbstractIn this work is discussed the synthesis of a novel antishrinking agent (SOC DA) and the evaluation of its performance in an acrylic dental resin. SOC DA was photopolymerized in conjunction with the components of a conventional acrylic resin, which includes a mixture of diacrylate monomers [glycerolate bisphenol A dimethacrylate (BIS-GMA) / Urethane dimethacrylate (UDMA) / triethyleneglycol dimethacrylate (TEGDMA)] in 50/30/20 molar ratio). SOC DA was added in a range between 5.0-20.0 mol % with respect to the total amount of moles of the acrylic monomers. It was found that increasing concentrations of SOC DA, promoted higher conversions of the dimethacrylate monomers without decreasing the photopolymerization rate of the acrylate monomers. The study of the effect of SOC DA on the mechanical properties of the dental composite filled with 70 % of silicon dioxide, revealed that the presence of the antishrinking agent improved both the compressive and the flexural strength of the dental materials. Besides, it was found that by using the SOC DA at 20%, the shrinkage was reduced 52%, compared with the same formulation without SOC DA.

Some Aspects of the Chemistry and Physics of Dental Resins

1988 ◽  
Vol 2 (1) ◽  
pp. 93-97 ◽  
Author(s):  
M. Braden
Keyword(s):  
Bisphenol A ◽  
Glycidyl Methacrylate ◽  
Room Temperature ◽  
High Modulus ◽  
Denture Base ◽  
Dental Resins ◽  
The Status ◽  
Injection Molded ◽  
Modulus Polyethylene ◽  
Polyethylene Fibers

The status of denture-base poly(methylmethacrylate) (PMMA) has been reviewed, and in spite of the availability of mechanically superior injection-molded resins, it remains the material of choice. PMMA can be reinforced with fibers, the most recent being ultra-high-modulus polyethylene fibers. Various elastomer reinforced materials are also available. Alternatives to room-temperature polymerizing PMMA resins include higher methacrylates and epimine resins. High-modulus resins have been produced with Bisphenol A-glycidyl methacrylate (BisGMA) and tetrahydrofurfuryl methacrylate, involving an anti-plasticizer function. Also reviewed are room-temperature polymerizing initiators, radio-opaque resins, and studies on polymerization shrinkage.

Bisphenol A as degradation product of monomers used in resin-based dental materials

2021 ◽  
Author(s):  
Siemon De Nys ◽  
Radu Corneliu Duca ◽  
Philippe Vervliet ◽  
Adrian Covaci ◽  
Imke Boonen ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Degradation Product ◽  
Dental Materials

scholarly journals Endocrine disruptors and dental materials: health implications associated with their use in Brazil

2002 ◽  
Vol 18 (2) ◽  
pp. 505-509 ◽  
Author(s):  
Antonio Jorge Molinário Coelho
Keyword(s):  
Occupational Exposure ◽  
Bisphenol A ◽  
Dental Materials ◽  
Chemical Properties ◽  
Work Force ◽  
Dental Practice ◽  
Resin Cements ◽  
Historical Trends ◽  
Contemporary Work ◽  
Force Characteristics

This study analyzes international historical trends in the use of different types of materials in dental practice. The author describes the chemical properties of their ingredients and the potential and observed adverse effects in patients and dental technicians resulting from clinical or occupational exposure to various metals like beryllium, used to produce metal alloys. The growing use of various products (resin cements, ionomer cements, aesthetic restorative materials, resins, endodontal cements, and others) based on the compound bisphenol-A, whose chemical structure is similar to that of estrogen. Considering the demographic and contemporary work force characteristics of those involved in dental practice in the Brazil, the study highlights the possible effect of the use of these materials in both male and female patients and all age strata, as well as in health professionals with occupational exposure to products containing bisphenol-A.

scholarly journals Detection of Bisphenol-A in Dental Materials by Gas Chromatography-Mass Spectrometry.

2000 ◽  
Vol 19 (1) ◽  
pp. 75-86 ◽  
Author(s):  
Atsufumi MANABE ◽  
Shoko KANEKO ◽  
Satoshi NUMAZAWA ◽  
Kazuo ITOH ◽  
Mitsuko INOUE ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Bisphenol A ◽  
Dental Materials ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry

The use of a bioactive bone cement containing apatite-wollastonite glass-ceramic filler and bisphenol-a-glycidyl methacrylate resin for acetabular fixation in total hip arthroplasty

2019 ◽  
Vol 101-B (7) ◽  
pp. 787-792 ◽  
Author(s):  
K. Goto ◽  
Y. Kuroda ◽  
T. Kawai ◽  
K. Kawanabe ◽  
S. Matsuda
Keyword(s):  
Total Hip Arthroplasty ◽  
Bisphenol A ◽  
Acetabular Component ◽  
Hip Arthroplasty ◽  
Glass Ceramic ◽  
Glycidyl Methacrylate ◽  
Long Term Results ◽  
Survival Analyses

Aims In the 1990s, a bioactive bone cement (BABC) containing apatite-wollastonite glass-ceramic (AW-GC) powder and bisphenol-a-glycidyl methacrylate resin was developed at our hospital. In 1996, we used BABC to fix the acetabular component in primary total hip arthroplasty (THA) in 20 patients as part of a clinical trial. The purpose of this study was to investigate the long-term results of primary THA using BABC. Patients and Methods A total of 20 patients (three men and 17 women) with a mean age of 57.4 years (40 to 71), a mean body weight of 52.3 kg (39 to 64), and a mean body mass index (BMI) of 23.0 kg/m2 (19.8 to 28.6) were evaluated clinically and radiologically. Survival analyses were undertaken, and wear analyses were carried out using a computer-aided method. Results The mean follow-up was 17.6 years (1.5 to 21.1). Radiological loosening occurred in four sockets with aseptic loosening at a mean of 7.8 years (1.5 to 20.7). Kaplan–Meier survival analyses using revision of the acetabular component, radiological loosening of the acetabular component, and the worst-case scenario with revision of the acetabular component to include the two patients lost to follow-up as endpoints yielded survival rates of 94.7%, 84.4%, and 85.0% at ten years, and 70.0%, 84.4%, and 62.8% at 20 years, respectively. Wear analysis revealed a mean linear wear rate of 0.068 mm per year. Conclusion The long-term results of primary THAs using BABC were unsatisfactory. Its brittle nature and poor handling properties need to be improved before it becomes an alternative method of fixing the acetabular component in cemented THA. Cite this article: Bone Joint J 2019;101-B:787–792.

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