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

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.

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The effects of process variables on levels of residual monomer in autopolymerizing dental acrylic resin

Journal of Dentistry ◽

10.1016/0300-5712(83)90051-9 ◽

1983 ◽

Vol 11 (1) ◽

pp. 80-88 ◽

Cited By ~ 57

Author(s):

D.J. Lamb ◽

Bryan Ellis ◽

David Priestley

Keyword(s):

Acrylic Resin ◽

Process Variables ◽

Residual Monomer ◽

Dental Acrylic

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ADDITION OF RICE HUSK NANOCELLULOSE TO THE IMPACT STRENGTH OF RESIN BASE HEAT CURED

Journal Of Vocational Health Studies ◽

10.20473/jvhs.v4.i3.2021.119-124 ◽

2021 ◽

Vol 4 (3) ◽

pp. 119

Author(s):

Muhammad Aditya Ramadhan Hasran ◽

Dian Noviyanti Agus Imam ◽

Bambang Sunendar

Keyword(s):

Impact Strength ◽

Mechanical Strength ◽

Rice Husk ◽

Acrylic Resin ◽

Control Group ◽

P Value ◽

Test Results ◽

Nano Cellulose ◽

Reinforcing Material ◽

The Impact

Background: One of the materials for denture bases is heat-cured acrylic resin (PMMA). This material still lacks impact strength as a mechanical strength property. The addition of reinforcing material is known to increase the mechanical strength of PMMA. One of the reinforcing materials added to PMMA is nano cellulose from rice husks, one of the wastes from agricultural products. Purpose: This study aims to determine rice husk nano cellulose's addition to the PMMA denture base's impact strength. Method: The research sample consisted of six groups, each group consisting of 8 samples selected by simple random. The PI, P2, P3, P4, P5, and K groups were PMMA with 1%, 2%, 3%, 4%, 5% nano cellulose, and without nano cellulose. Result: Mean impact strength test results were 41.50 x 10-3 ± 3.891 J / mm2 for P1, 44.13 x 10-3 ± 3,980 J / mm2 for P2, 45.63 x 10-3 ± 4,438 J / mm2 for P3, 46.87 x 10-3 ± 4,824 J / mm2 for P4, 49.12 x 10-3 ± 4.016 J / mm2 for P5 and 36.25 x 10-3 ± 1.982 J / mm2 for K. One way Anova test results with p-value of 0.000 indicates differences in the six groups (p<0.05). Conclusion: This study concludes that the impact strength value of PMMA with the addition of rice husk nano cellulose has increased compared to the control group without the addition of rice husk nano cellulose.

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

RGO - Revista Gaúcha de Odontologia ◽

10.1590/1981-863720150002000052492 ◽

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.

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Development of a Radiopaque, Autopolymerizing Dental Acrylic Resin

Journal of Prosthodontics ◽

10.1111/j.1532-849x.1994.tb00158.x ◽

1994 ◽

Vol 3 (4) ◽

pp. 213-218 ◽

Cited By ~ 11

Author(s):

Patrick A. Mattie ◽

H. Ralph Rawls ◽

Israel Cabasso

Keyword(s):

Acrylic Resin ◽

Dental Acrylic

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Consolidation treatments applied to ceramic tiles: are they homogeneous?

Materiales de Construcción ◽

10.3989/mc.2017.09015 ◽

2017 ◽

Vol 67 (325) ◽

pp. 113 ◽

Cited By ~ 2

Author(s):

D. Costa ◽

A. S. Leal ◽

J. M. Mimoso ◽

S. R.M. Pereira

Keyword(s):

Mechanical Strength ◽

Penetration Depth ◽

Acrylic Resin ◽

Measuring System ◽

Strength Testing ◽

Testing Methods ◽

Ceramic Tiles ◽

Consolidation Treatment ◽

Extensive Evaluation ◽

Drilling Resistance

The mass consolidation treatment of azulejos is necessary when ceramic biscuits show signs of disaggregation. Such treatment is often used as a complementary conservation technique to the reestablishment of weakened glaze-ceramic bonds. In this research, two commonly used consolidants (ethyl silicate and acrylic resin) were tested on artisanal ceramic tiles via mass consolidation and the resulting impregnation profiles were evaluated. The results indicated that after consolidation, hard zones frequently formed due to localized consolidant concentration after the polymerization and curing processes. These inhomogeneous hard zones subsequently influenced the results obtained through conventional mechanical strength testing (i.e. flexural and compression), creating a false impression of success. This research demonstrated that by using the Drilling Resistance Measuring System, impregnation characteristics such as penetration depth and distribution of consolidant could be observed that otherwise could not be discerned through the more common testing methods. As such, a more extensive evaluation of consolidation effects was achieved.

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