Multifunctional Restorative Dental Materials: Remineralization and Antibacterial Effect

AbstractTo investigate the impact of radiotherapy on surface properties of restorative dental materials. A conventional resin composite—CRC (Aura Enamel), a bulk-fill resin composite—BFRC (Aura Bulk-fill), a conventional glass ionomer cement—CGIC (Riva self cure), and a resin-modified glass ionomer cement—RMGIC (Riva light cure) were tested. Forty disc-shaped samples from each material (8 mm diameter × 2 mm thickness) (n = 10) were produced according to manufacturer directions and then stored in water distilled for 24 h. Surface wettability (water contact angle), Vickers microhardness, and micromorphology through scanning electron microscopy (SEM) before and after exposition to ionizing radiation (60 Gy) were obtained. The data were statistically evaluated using the two-way ANOVA and Tukey posthoc test (p < 0.05). Baseline and post-radiation values of contact angles were statistically similar for CRC, BFRC, and RMGIC, whilst post-radiation values of contact angles were statistically lower than baseline ones for CGIC. Exposition to ionizing radiation statistically increased the microhardness of CRC, and statistically decreased the microhardness of CGIC. The surface micromorphology of all materials was changed post-radiation. Exposure to ionizing radiation negatively affected the conventional glass ionomer tested, while did not alter or improved surface properties testing of the resin composites and the resin-modified glass ionomer cement tested.

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

Materials ◽

10.3390/ma14061442 ◽

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.

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An experimental study of the adhesion of bacterial layers to some restorative dental materials

European Journal Of Oral Sciences ◽

10.1111/j.1600-0722.1986.tb01381.x ◽

1986 ◽

Vol 94 (2) ◽

pp. 164-173

Author(s):

A. TULLBERG

Keyword(s):

Experimental Study ◽

Dental Materials ◽

Restorative Dental Materials

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Measurement of the fluorescence of restorative dental materials using a 655-nm diode laser

10.1117/12.424492 ◽

2001 ◽

Cited By ~ 2

Author(s):

Fatima A. A. Zanin ◽

Dilma H. Souza-Campos ◽

Sissi Zanin ◽

Aldo Brugnera, Jr. ◽

Jesus D. Pecora ◽

...

Keyword(s):

Diode Laser ◽

Dental Materials ◽

Restorative Dental Materials

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Pengaruh Penambahan Hidroksiapatit dari Cangkang Telur Ayam Terhadap Kekerasan Permukaan GIC

Jurnal Material Kedokteran Gigi ◽

10.32793/jmkg.v5i2.247 ◽

2016 ◽

Vol 5 (2) ◽

pp. 8

Author(s):

Putri Ajri Mawadara ◽

Martha Mozartha ◽

Trisnawaty K

Keyword(s):

Dental Materials ◽

Surface Hardness ◽

T Test ◽

Control Group ◽

System A ◽

Significant Difference ◽

Calcium Source ◽

Chicken Eggshell ◽

Restorative Dental Materials ◽

Experimental Group

Hydroxyapatite (HA) is a bioceramic with excellentbiocompatible properties, and composition and crystal structure similar to apatite in the human dental structure and skeletal system. A number of researchers have attempted to evaluate the effect of the addition of HA powders to increasemechanical properties of restorative dental materials. In this study, HA was synthesized using chicken eggshell as calcium source for synthesizing HA by using precipitation technique. The aim of this study was to determine the effect of incorporation of eggshell-derived HA on the surface hardness GIC (Fuji IX GP). Specimens were divided into two groups: group GIC without incorporation of HA as control group (n = 16) and group GIC with incorporation of 5% HA as experimental group (n = 16). Total of specimens were 32 cylinders 5mm diameter and 2mm height. Surface hardness GIC was measured with vickers microhardness tester. Data wasanalyzed by unpaired T-test. The mean of surface hardness for GIC control group was 51.37 ± 1,63VHN and the experimental group was 56.60 ± 1,22HVN. The results T-test showed a significant difference between groups (p<0.05). It can be concluded thatincorporation of eggshell-derivedHA could increasesurface hardness of GIC.

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