Loss into water of residual monomer from autopolymerizing dental acrylic resin

Biomaterials ◽  
1982 ◽  
Vol 3 (3) ◽  
pp. 155-159 ◽  
Author(s):  
D.J. Lamb ◽  
Bryan Ellis ◽  
David Priestley
Keyword(s):  
Acrylic Resin ◽  
Residual Monomer ◽  
Dental Acrylic

scholarly journals Antibacterial Effect of Amino Acid–Silver Complex Loaded Montmorillonite Incorporated in Dental Acrylic Resin

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1442
Author(s):  
Kumiko Yoshihara ◽  
Noriyuki Nagaoka ◽  
Aya Umeno ◽  
Akinari Sonoda ◽  
Hideki Obika ◽  
...  
Keyword(s):  
Amino Acid ◽  
Antibacterial Agents ◽  
Antibacterial Effect ◽  
Dental Materials ◽  
Silver Ions ◽  
Acrylic Resin ◽  
Chloride Ions ◽  
Antibacterial Efficacy ◽  
Growth Measurement ◽  
Dental Acrylic

Several dental materials contain silver for antibacterial effect, however the effect is relatively low. The reason for the lower antibacterial efficacy of silver is considered to be the fact that silver ions bind to chloride ions in saliva. To develop new effective silver antibacterial agents that can be useful in the mouth, we synthesized two novel amino acid (methionine or histidine)–silver complexes (Met or His–Ag) loaded with montmorillonite (Mont) and analyzed their antibacterial efficacy. At first the complexes were characterized using nuclear magnetic resonance (NMR), and amino acid–Ag complex-loaded Mont (amino acid–Ag–Mont) were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The antibacterial efficacy of these materials in dental acrylic resin was then investigated by bacterial growth measurement using a spectrophotometer. As controls, commercially available silver-loaded zeolite and silver-zirconium phosphate were also tested. Dental acrylic resin incorporating His–Ag–Mont strongly inhibited Streptococcus mutans growth. This was explained by the fact that His-Ag complex revealed the highest amounts of silver ions in the presence of chloride. The structure of the amino acid–Ag complexes affected the silver ion presence in chloride and the antibacterial efficacy. His–Ag–Mont might be used as antibacterial agents for dental materials.

The Effect of Chitosan Addition in Acrylic Resin Matrix towards the Residual Monomers and Impact Strength

2021 ◽  
pp. 2280-2285
Author(s):  
Titik Ismiyati ◽  
Ananto Ali Alhasyimi
Keyword(s):  
Acrylic Acid ◽  
Impact Strength ◽  
Charpy Impact ◽  
Acrylic Resin ◽  
Test Sample ◽  
Acid Group ◽  
Resin Matrix ◽  
Residual Monomer ◽  
Group 2 ◽  
The Impact

Background: A residual monomer might have impact on the quality of acrylic resin since its caused allergic reactions and inflammation. Chitosan is a biocompatible material and potential to reduce residual monomers and ameliorate the impact strength of acrylic resin Objective of the study: To examine the effect of an acrylic resin matrix mixed with chitosan together with 1% and 2% acrylic acid as denture base and orthodontic material on residual monomers and impact strength. Methodology: There were 30 samples for the test analysis. The impact strength test sample formed with a plate size of 55 × 10 × 10mm, whereas the residual monomer test sample was prepared into powder. The test samples were divided into 3 groups, of 10 samples. Group 1 acrylic resin only, group 2 acrylic resin matrix mixed with chitosan and 1% acrylic acid, group 3 is the same as group 2 but with a concentration of 2% acrylic acid. Gas chromatography was used for measuring the residual monomers. The impact strength was tested by the Charpy impact. The data was evaluated using the ANOVA and correlation test. Results: There were significant differences (p < 0.05) in acrylic resin without addition with the matrix of acrylic resin with chitosan and acrylic acid 1% and 2% to the number of monomers and impact strength. Conclusion: The mixture of acrylic resin with chitosan and acrylic acid 1% and 2% can reduce the amount of residual monomer and increase the impact strength.

scholarly journals Influence different amount of cellulose on the mechanical strength of dental acrylic resin

2020 ◽  
Vol 743 ◽  
pp. 012044 ◽  
Author(s):  
Joanna Taczała ◽  
Chang Fu ◽  
Jacek Sawicki ◽  
Joanna Pietrasik
Keyword(s):  
Mechanical Strength ◽  
Acrylic Resin ◽  
Dental Acrylic

scholarly journals Residual Monomer of Autopolymerized Acrylic Resin According to Different Manipulation and Polishing Methods

2008 ◽  
Vol 78 (4) ◽  
pp. 722-727 ◽  
Author(s):  
Tatiana Siqueira Gonçalves ◽  
Luciane Macedo de Menezes ◽  
Luiz Ernani Aguiar Silva
Keyword(s):  
Acrylic Resin ◽  
Residual Monomer

scholarly journals POSSIBILITIES FOR MODIFICATION OF SURGICAL OBTURATOR INTO TEMPORARY OBTURATOR

2021 ◽  
Vol 27 (1) ◽  
pp. 3615-3618
Author(s):  
Ivan Gerdzhikov ◽  
Keyword(s):  
Clinical Case ◽  
Healing Process ◽  
Acrylic Resin ◽  
Surgical Operation ◽  
Decubitus Ulcers ◽  
Treatment Results ◽  
Residual Monomer ◽  
Direct Design ◽  
Different Types ◽  
Irreversible Hydrocolloid

Background: Maxillary resection causes different types of damages in the maxillofacial area, which are treated by surgical and prosthetic restorative methods. Aim: The described clinical case follows up the initial stages of the prosthetic treatment, as well as the possible modification of surgical obturator into temporary obturator in a patient with maxillary resection. Materials and methods: The prosthetic treatment of a 55-years-old female patient with a surgical operation of upper jaw cancer is described. The surgical obturator is developed a week after the resection. The preliminary impressions are taken with irreversible hydrocolloid impression material. The occlusion height and central relation are fixed by occlusion rims. The surgical obturator was fabricated by heat cured acrylic resin with a low amount of residual monomer. Moreover, metal clasps were used for retention and stability. The borders of the obturating part were covered with a thin layer of relining silicone material after the adjustment. The surgical obturator was modified into a temporary one directly in the patient's mouth after two months by applying the same rebasing material and designing a silicone hollow-bulb obturating part. Results: The treatment results revealed a successful restoration of the patient's speaking, feeding, and swallowing abilities. The application of silicone material inhibited the appearance of decubitus ulcers and facilitated the normal healing process. The direct design of hollow-bulb silicone obturating part significantly improved the retention and stability of the obturator. Conclusion: The application of prosthetic treatment methods in the first days after the maxillary resection allows for restoration of speaking and feeding.

scholarly journals Weight loss promoted by the Intra-oral Alimentary Satiety Device in a morbidly obese patient

2015 ◽  
Vol 63 (2) ◽  
pp. 169-174
Author(s):  
Mariane HALMENSCHLAGER ◽  
Alexandre CONDE ◽  
Simara Rufatto CONDE ◽  
Thaís Rodrigues MOREIRA
Keyword(s):  
Weight Loss ◽  
Steel Wire ◽  
Acrylic Resin ◽  
The Body ◽  
Hypocaloric Diet ◽  
Morbidly Obese ◽  
Morbidly Obese Patient ◽  
Dental Acrylic ◽  
Treatment Of Obesity ◽  
Anthropometric Assessment

OBJECTIVE: To evaluate the weight loss fostered by the Intra-oral Alimentary Satiety Device in a patient diagnosed as morbidly obese. METHODS: A female patient diagnosed as morbidly obese who was seeing a nutritionist was examined. Based on her medical history and anthropometric assessment, a hypocaloric diet was prescribed. The nutritional state was assessed by the Body Mass Index (BMI). The patient was advised to wear the Intra-oral Alimentary Satiety Device, and an assessment by a dentist was suggested to discard contraindications. The appliance was then manufactured with dental molding material, orthodontic stainless steel wire, and heat-cured dental acrylic resin. The patient wore the device at every meal, putting it on 5 minutes in advance. For the data analysis the SPSS Statistics 17.0 software was used. RESULTS: In her first consultation, the patient weighed 115 kg and was 1.62 m tall, with BMI = 43.82 Kg/m. Weight loss was 13.3 kg, representing 11.57% of the initial weight. In relation to the BMI, the total loss was 5.06 Kg/m, representing 11.55%. CONCLUSION: The Intra-oral Alimentary Satiety Device can be considered a safe and effective method which, together with a hypocaloric diet, shows satisfactory results, thus proving to be an important auxiliary option in the treatment of obesity.

Surface Microstructure Study of Self Cured Acrylic Resin after Immersion in Arabica Gayo Coffee

2020 ◽  
Vol 48 ◽  
pp. 62-69
Author(s):  
Viona Diansari ◽  
Subhaini ◽  
Arihta Putri
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Acid Content ◽  
Acrylic Resin ◽  
Polymer Chains ◽  
Surface Microstructure ◽  
Residual Monomer ◽  
Microstructure Observation ◽  
Acrylic Resins ◽  
Scanning Electron

The water absorption on self-cured acrylic resin is higher than the heat cured acrylic resin. Incoming water positions itself between the polymer chains and affects the surface microstructure of self-cured acrylic resin. The absorption of liquids such as Arabica Gayo coffee may aggravate the surface structure of self-cured acrylic resins due to their acid content. This study aims to find out the microstructure of self-cured acrylic resin surface after immersed in Arabica Gayo coffee for 2 and 7 days. This study used 5 specimens of self-cured acrylic resin (MeliodentTM) with size 10x10x1,5 mm3. Each specimen was immersed in aquades for 24 hours to reduce the residual monomer and then be given different immersion treatments. The immersion temperature used was 55°C. After immersion, surface microstructure observation was done using Scanning Electron Microscope (JEOL JSM 6510 LA). The images obtained were bubbles after being immersed in aquades for 2 days and more on day 7, micro porous after being immersed in Arabica Gayo coffee for 2 days and more on day 7 than untreated specimens. The conclusion of this study is micro porous formed more on the surface of self-cured acrylic resin along with the duration of self-cured acrylic resin immersion in Arabica Gayo coffee.

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