Effect of different edge profile, surface treatment, and glass fiber reinforcement on the transverse strength of denture base resin repaired with autopolymerizing acrylic resin: An In vitro study

Vasthare, Abubakkar; Shetty, Sanath Kumar; Shenoy, KK Kamalakanth; Shetty, Mallika; Parveen, Katheesa; Shetty, Rajesh

doi:10.4103/jid.jid_80_16

Cited by 12 publications

(16 citation statements)

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“…The size of nano-SiO 2 being <100 nm enabled them to penetrate between linear macromolecule chains restricting their movement. 38,39 Based on the results of this study, the addition of nano-SiO 2 to repair resin significantly improved the impact strength of repaired resin. The increase in impact strength with low SiO 2 concentration may be due to interfacial shear strength between nanoparticles and resin matrix owing to cross-linking or supra molecular bonding which prevents crack propagation.…”

Section: Discussionmentioning

confidence: 73%

“…The increase in flexural strength with low nano‐SiO 2 concentration may be attributed to the homogenous distribution of nanoparticles and their ability to fill inter‐polymeric chain spaces. The size of nano‐SiO 2 being <100 nm enabled them to penetrate between linear macromolecule chains restricting their movement . Based on the results of this study, the addition of nano‐SiO 2 to repair resin significantly improved the impact strength of repaired resin.…”

Section: Discussionmentioning

confidence: 76%

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Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength

Abushowmi

AlZaher

Almaskin

et al. 2019

Journal of Prosthodontics

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Purpose To evaluate and compare the effects of glass fiber (GF), Zirconium oxide nanoparticles (nano‐ZrO2), and silicon dioxide nanoparticles (nano‐SiO2) addition on the flexural strength and impact strength of repaired denture base material. Materials and Methods Heat‐polymerized acrylic resin specimens were fabricated. All specimens were sectioned centrally and beveled creating 2.5 mm repair gap except for 10 controls. Specimen grouping (n = 10/group) was done according to filler concentration of 0%, 0.25%, 0.5%, and 0.75% of auto‐polymerized acrylic powder. Modified resin was mixed, packed in the repair gap, polymerized, finished and polished. Three‐point bending test and Charpy type impact testing were done. Data were analyzed using one‐way‐ANOVA and Post‐Hoc Tukey test (α = 0.05). Results All additives significantly increased flexural strength and impact strength (p < 0.05). Within the modified subgroups, no significant differences were found for GF. Significant increase for nano‐ZrO2 and significant decrease for nano‐SiO2 as the concentration of additive increased were noted for both flexural strength and impact strength. Highest flexural strength was found with 0.75%‐nano‐ZrO2 (69.59 ± 2.52MPa) and the lowest was found with 0.75%‐nano‐SiO2 (53.82 ± 3.10MPa). The 0.25%‐nano‐SiO2 showed the highest impact strength value (2.54 ± 0.21 kJ/m2) while the lowest impact strength value was seen with 0.75%‐nano‐SiO2 (1.54 ± 0.17 kJ/m2). Conclusion Nano‐filler effect was concentration dependent and its addition to repair resin increased the flexural and impact strengths. The incorporation of 0.75%‐ZrO2 or 0.25%‐SiO2 into repair resin proved to be a promising technique to enhance repair strength and avoid repeated fractures.

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 76%

Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength

Abushowmi

AlZaher

Almaskin

et al. 2019

Journal of Prosthodontics

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“…Several studies of repairs have used different gap widths . Numerous studies tested a 10‐mm gap; others used 5‐mm and 3‐mm gaps . Some other studies used a 2.5‐mm repair gap, but few studies tested smaller repair gaps of 2 mm, 1.5 mm, and 1 mm .…”

mentioning

confidence: 99%

“…Some other studies used a 2.5‐mm repair gap, but few studies tested smaller repair gaps of 2 mm, 1.5 mm, and 1 mm . Despite the wide range of repair gaps in different studies, the effect of gap width on strength was not tested extensively, and the main focus was on repair surface design, material reinforcement, and/or surface treatment …”

mentioning

confidence: 99%

“…24 Despite the wide range of repair gaps in different studies, the effect of gap width on strength was not tested extensively, and the main focus was on repair surface design, material reinforcement, and/or surface treatment. 4,[6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] Few studies 5,21,25 have investigated the effect of repair gap size along with the other factors. Beyli and von Fraunhofer 5 suggested that small gap sizes (3 mm or less) would use less repair material, reduce polymerization shrinkage, and minimize color difference between original resin and repair material.…”

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confidence: 99%

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Effect of Repair Gap Width on the Strength of Denture Repair: An In Vitro Comparative Study

Gad

Rahoma

Abualsaud

et al. 2019

Journal of Prosthodontics

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Purpose To evaluate the effect of repair gap width on the flexural strength and impact strength of a repaired acrylic denture with and without thermal cycling. Materials and Methods A total of 240 heat‐polymerized acrylic resin specimens were fabricated in dimensions of 65 × 10 × 2.5 ± 0.2 mm and 55 × 10 × 10 ± 0.2 mm for flexural strength and impact strength testing, respectively. All specimens were sectioned into halves then divided into 6 groups according to repair gap width (n = 10). The repair gap of the control group was 2.5 mm at the base, while the repair gaps of the test groups were prepared as 2.0, 1.5, 1.0, 0.5, and 0 mm at the base. All specimens were prepared with a 45° bevel joint. Each specimen was placed into the mold that retained the original length of the specimen and modified only the repair gap, which was packed with repair resin. After polymerization, specimens were finished and polished, and half of the specimens were thermal cycled for 5000 cycles. Three‐point bending test and Charpy impact test were used to determine the flexural strength and impact strength, respectively. ANOVA and Tukey's HSD test were used for statistical analysis, where α was set at 0.05. Results Decreasing repair gap significantly increased the flexural strength in comparison to control group (p < 0.05); 0.5‐mm repair gap showed the highest flexural strength values. Changing the repair gap significantly increased the impact strength of groups 2.0‐ and 1.5‐mm (p < 0.05). Thermal cycling significantly decreased the flexural strength of all tested groups as well as impact strength for groups with wide repair gaps (2.5‐, 2.0‐, and 1.5‐mm) (p < 0.05), while other tested groups had nonsignificant effect on impact strength (p > 0.05). Conclusion Decreasing repair gap increased the flexural and impact strengths of repaired acrylic resin. A repair gap of 0‐, 0.5‐, or 1.0‐mm with beveled repair surface is recommended to improve repair strength and overcome the drawbacks of increased amounts of autopolymerized repair resin.

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Effect of different surface treatments on surface roughness and flexural strength of repaired 3D-printed denture base: An in vitro study

Asli

Rahimabadi

Hemmati

et al. 2021

The Journal of Prosthetic Dentistry

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Effect of different edge profile, surface treatment, and glass fiber reinforcement on the transverse strength of denture base resin repaired with autopolymerizing acrylic resin: An In vitro study

Cited by 12 publications

References 0 publications

Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength

Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength

Effect of Repair Gap Width on the Strength of Denture Repair: An In Vitro Comparative Study

Effect of different surface treatments on surface roughness and flexural strength of repaired 3D-printed denture base: An in vitro study

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