scholarly journals The Effect of Addition of Bambusa Arundinacea (Retz.) Willd. Fibers to Heat-Cured Acrylic Resin on Impact Strength

2018 ◽  
Vol 1 (2) ◽  
pp. 81
Author(s):  
Chanita Elonianty ◽  
Titien Hary Agustantina ◽  
Intan Nirwana
Keyword(s):  
Impact Strength ◽  
Low Cost ◽  
Acrylic Resin ◽  
Test Results ◽  
High Toughness ◽  
Significant Difference ◽  
Impact Tester ◽  
Strength Formula ◽  
The Impact ◽  
One Way Anova

Background: The prevalence of acrylic resin dentures fracture due to accidental drop is relatively high especially when it is being cleaned by patient. The effort to strengthen acrylic resin denture was done by adding Bambusa arundinacea (Retz.) Willd fibers, which was based on previous research. It has been proven that the addition of bamboo fiber to self-cured acrylic resin can increase the tensile strength. It has acceptable tensile properties, relatively low cost, high toughness, and good thermal properties. Purpose: To determine the impact strength of heat-cured acrylic resin after the addition of Bambusa arundinacea (Retz.) Willd. fibers at various lengths and weights. Methods: Bambusa arundinacea (Retz.) Willd. fibers with lengths of 2 mm, 6 mm, 12 mm and weights of 3wt%, 6wt%, 9wt% were added to heat-cured acrylic resin. The impact strength of heat-cured acrylic resin was tested using the Charpy method with mini impact tester KRY type. The test results were calculated using the impact strength formula. The research data were analyzed using one-way anova test and Tukey HSD test. Results: The data analysis showed that there was a significant difference in impact strength of heat-cured acrylic resin after the addition of Bambusa arundinacea (Retz.) Willd fibers. Conclusion: Addition of Bambusa arudinacea (Retz.) Willd. fibers increased the impact strength of heat-cured acrylic resin respective to the increment of length and weight of Bambusa arudinacea (Retz.) Willd. fibers.

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

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.

scholarly journals Enhancing the impact strength of acrylic resin base plate by adding non-dental E-glass fiber

2021 ◽  
Vol 6 (2) ◽  
pp. 106
Author(s):  
Mara Gustina ◽  
Widjijono Widjijono ◽  
Endang Wahyuningtyas
Keyword(s):  
Impact Strength ◽  
Glass Fiber ◽  
Fiber Orientation ◽  
Base Plate ◽  
Acrylic Resin ◽  
Impact Testing ◽  
Control Group ◽  
Anova Test ◽  
The Impact ◽  
One Way Anova

Non-dental glass fiber is one of the materials that can be used to increase the impact strength of a acrylic resin base plate, containing a similar composition to that of dental e-glass fiber. Orientation and positions of fiber affect the reinforcement effectiveness. This research aimed to examine the effect of the orientation of non-dental glass fiber in the compression position on the impact strength of an acrylic resin base plate. The research was conducted on 16 acrylic resin plates with fiber (65 mm x 10 mm x 2.5 mm) addition. The samples were divided into 4 groups (combination of different woven orientation unidirectional, bidirectional woven in the compression position, and control). The material used in this study was heat-cured acrylic resin QC-20 brand, non-dental glass fiber (without any brand). Impact strength was tested using an impact testing machine. The data obtained were analyzed using one-way ANOVA test and LSD (p<0.05). In this research the impact strength of the base plate with the addition of fiber increased 8.54 ± 2.21; 13.21 ± 2.34; 16.81 ± 2.80 kJ/m2 compared to that of the control group, i.e. 4.98 ± 1.05 kJ/m2. One-way ANOVA test showed a significant effect (p<0.05) of the fiber orientation variations on the compression position. This research concluded that the addition of nondental e-glass fiber (composed of SiO252.56-56.88%), diameter 17.12–20.03 µm) in the compression zone increases theimpact strength of acrylic resin base plate. Fibers with unidirectional orientationprovides the highest increase in the impact strength of acrylic resin base plate.

IMPACT STRENGTH TEST ON ADDITION OF AGAVE SISALANA FIBER AND E-GLASS FIBER IN ACRYLIC RESIN DENTAL PLATE REPAIR

2021 ◽  
Vol 17 (1) ◽  
pp. 49-55
Author(s):  
Ni Kadek Sugianitri ◽  
◽  
Suhendra Suhendra ◽  
Keyword(s):  
Impact Strength ◽  
Glass Fiber ◽  
Acrylic Resin ◽  
Control Group ◽  
Denture Base ◽  
Denture Plate ◽  
Significant Difference ◽  
The Impact ◽  
Agave Sisalana ◽  
Fiber Addition

Introduction: Acrylic resin is the most common material for the denture base because the acrylic resin has good esthetics, ease of processing, reparability, and inexpensive. A disadvantage of acrylic resin is that it is easy to be cracked. One of the ways to resolve this problem is by adding agave sisalana fiber and E-glass fiber. The purpose of this study was to find out the effect of the addition of agave sisalana fiber and E-glass fiber on the impact strength of an acrylic resin denture plate reparation. Material and Method: The experiment involved twenty-seven plates of heat-cured acrylic with the dimensions of 55x 10 x 10 mm with the 26 x 5 x 4 mm for the cavity to measure, each measurement divided into three groups, with nine samples for each group. The first group was a control group (without fiber), the second group was a group with agave sisalana fiber addition, the third group was a group with e-glass fiber addition. All plates were soaked in distillation water for one day at 37o C. Plates were tested for impact strength using the Charpy method. All data obtained were analyzed with one-way ANOVA followed by LSD (Least Significant Difference) with p<0,05. Result and Discussion: The result showed that the influences of impact strength between without fiber with agave sisalana fiber and E-glass fiber addition on acrylic denture reparation. Acrylic denture reparation in both fibers with concentration 3,3%, agave sisalana fiber has the highest impact strength rather than e-glass fiber. Conclusion: The conclusion of this study is that there is an increase in impact strength with agave sisalana fiber and E-glass fiber addition on acrylic denture reparation and agave sisalana fiber has the highest impact strength.

scholarly journals TiO2-Nanofillers Effects on Some Properties of Highly- Impact Resin Using Different Processing Techniques

2018 ◽  
Vol 12 (1) ◽  
pp. 202-212 ◽  
Author(s):  
Hawraa Khalid Aziz
Keyword(s):  
Thermal Conductivity ◽  
Impact Strength ◽  
Color Stability ◽  
Acrylic Resin ◽  
Water Bath ◽  
Control Group ◽  
Significance Level ◽  
Significant Difference ◽  
And Control ◽  
The Impact

Background: The criteria of conventional curing of polymethyl methacrylate do not match the standard properties of the denture base materials. Objectives: This research was conducted to investigate the addition of TiO2 nano practical on impact strength, thermal conductivity and color stability of acrylic resin cured by microwave in comparison to the conventional cured of heat-polymerized acrylic resin. Materials and Methods: 120 specimens made of high impact acrylic resin were divided into two main groups according to the type of curing (water bath, microwave), then each group was subdivided into two groups according to the addition of 3% TiO2 nano-fillers and control group (without the addition of TiO2 0%). Each group was subdivided according to the type of test into 3 groups with 10 specimens for each group. Data were statistically analyzed using Student t-test to detect the significant differences between tested and control groups at significance level (P<0.05). Results: According to curing type methods, the results showed that there was a significant decrease in impact strength of microwaved cured resin, but there was no significant difference in the thermal conductivity and color stability of resin. In addition, by using nanofiller, there was a significant increase in the impact strength and color stability with the addition of 3% TiO2 nanofillers, but no significant difference was found in the thermal conductivity of the acrylic resin. Conclusion: The microwave curing of acrylic resin had no change in the color stability and thermal conductivity in comparison to the water bath, but the impact strength was decreased. The addition of 3% TiO2 improved the impact and the color stability, but the thermal conductivity did not change.

scholarly journals Influence of Processing Techniques on Microhardness and Impact Strength of Conventional and Reinforced Heat Cured Acrylic Resin: A Comparative Study

2021 ◽  
Vol 58 (3) ◽  
pp. 239-246
Author(s):  
Aisha Kiran ◽  
Faiza Amin ◽  
Muneeb A Lone ◽  
Imran Alam Moheet ◽  
Maham M Lone ◽  
...  
Keyword(s):  
Impact Strength ◽  
Acrylic Resin ◽  
Water Bath ◽  
P Value ◽  
Dry Heat ◽  
Heat Cure ◽  
Significant Difference ◽  
Group A ◽  
Processing Techniques ◽  
The Impact

This study determined and compared the influences of various processing techniques including air circulating oven (ACO), dry heat oven (DHO) and water bath (WB) on the impact strength (IS) and microhardness (HV) of the conventional heat cure acrylic resin (CHCAR) and rubber reinforced heat cure acrylic resin (RRHCAR). Samples were fabricated using CHCAR (control Group A; n=114) and RRHCAR (experimental Group B; n=114). Group A and B were further divided into subgroups according to processing techniques: ACO, DHO and WB (n=38 each) for both testing variables microhardness and impact strength (n=19 each). Charpy testing machine and Vickers microhardness tester were utilized. Analysis of variance was applied to determine the presence of significant differences among processing techniques while P-value ≤ 0.05 was considered as significant. Water bath (P-value [0.001) and DHO technique (p-value [0.001) showed significant differences between both groups� impact strength and microhardness. Microhardness of group A and B showed a significant difference (p-value 0.002) when processed by ACO. Impact strength and micro hardness were improved in RRHCAR compared to CHCAR processed by ACO and DHO in comparison to WB technique. Rubber reinforced heat cure acrylic resin revealed improvement in the impact strength and microhardness. The air circulating oven exhibited highest microhardness in both testing materials. Dry heat oven showed improved values of impact strength in conventional heat cure acrylic resin.

ENHANCEMENT OF DENTURE-BASED MATERIAL PMMA BY INCORPORATION OF SILANIZED HALLOYSITE NANOTUBES

2021 ◽  
Vol 74 (9) ◽  
pp. 2293-2296
Author(s):  
Rafah Habib Abdul Amir
Keyword(s):  
Impact Strength ◽  
Base Material ◽  
Hardness Test ◽  
Acrylic Resin ◽  
Halloysite Nanotubes ◽  
Control Group ◽  
Transverse Strength ◽  
Comparison Results ◽  
Significant Difference ◽  
The Impact

The aim: This study evaluates the effect of adding silanized halloysite nanotubes to the polymethylmethacrylate (PMMA) resin on its hardness, impact strength, transverse strength. Materials and methods: Three groups of acrylic resin were prepared, one group without HNTs, was used as a control group (A). The other two groups contained 0.3% (B), 0.6% wt of silanized halloysite nanotubes (C). For each one, hardness, impact strength and transverse strength were measured. One-way ANOVA and Tukey’s test were used for comparison. Results: Regarding to the impact test, there was no significant difference between 0.3% concentration and the pure (control) group while 0.6% concentration had significant decrease compared to the pure group and so between the 0.3% group 0.6% group. For the hardness test, the 0.3% group had no significant difference with the pure group and a significant difference between group 0.6% group and the pure group while there was a no significant decrease between the 0.3% and 0.6% group with the higher hardness mean in the 0.3% compared to 0.6% group. For the transverse strength, both 0.3% wt concentration and 0.6% concentration showed significant difference compared to the pure group and also between each other with the lowest impact strength in 0.6% group followed by 0.3% group with the highest transverse strength in the pure group. Conclusions: The silanation of halloysite nanotubes reduces the mechanical properties of the heat-cured acrylic denture base material. The more concentration of silanazed halloysite nanotubes is added, the more weakening occurs in the acrylic material relating to the hardness, transverse strength and impact strength.

scholarly journals Mechanical Properties of Heat Cured Acrylic Resin Reinforced with Natural Sisal Fibers Powder

2021 ◽  
Vol 2114 (1) ◽  
pp. 012023
Author(s):  
Teba M. Hameed ◽  
Balqees M. Al-Dabbagh ◽  
Ragdaa K. Jasim
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Flexural Strength ◽  
Acrylic Resin ◽  
Impact Testing ◽  
Bending Test ◽  
Heat Cure ◽  
Significant Difference ◽  
Sisal Fibers ◽  
The Impact

Abstract Materials and Methods: In total, 90 specimens were prepared to be used in the study. The specimens were divided into (3) main groups depended on the presence of sisal fibers powder, first group (30) specimens of heat cure PMMA without additives (control), second and third experimental groups of 60 specimens of heat cure PMMA with salinized sisal fibers powder with two different weight percentages (1 and 3%) wt. Three point bending test was used to measure the flexural strength of the specimens, while the impact strength was done by impact testing Charpy’s machine and tensile test was performed according to ASTM (D-638). Data analysis was performed using (ANOVA) test. The results of this study refer to a highly significant in the flexural strength and tensile strength of specimens reinforced with sisal fibers powder compared with control specimens. Non-significant difference was detected in impact strength among the reinforced groups and control gro. Reinforcement of acrylic resin with natural sisal fibers powder affects its flexural strength and tensile strength with non-significant in impact strength.

scholarly journals The Impact of Pragmatic Markers Acquisition and Phonological Awareness on Word Choice in Translating Literary Texts from Arabic into English

2019 ◽  
Vol 9 (3) ◽  
pp. 95
Author(s):  
Salwa Alwafai
Keyword(s):  
Phonological Awareness ◽  
Literary Texts ◽  
Control Group ◽  
Word Choice ◽  
Test Results ◽  
Pragmatic Markers ◽  
Significant Difference ◽  
English Translations ◽  
The Impact ◽  
One Way Anova

Pragmatic markers, either primary or secondary, contribute to the specificity of languages and are sensitive on being translated. This study traces the use of well, the commonest pragmatic marker in the English discourse, in a corpus of translated Arabic novels. The study, too, addresses the influence of the translators&rsquo; phonological awareness on their word choices, in the same corpus. Adjacent consonants, consonant-starting and quarter-syllabic words are studied in four groups: free writing of native authors as a control group (G1), literary translations by native English translators (G2), literary English translations by Arabic translators (G3) as well as literary English translations by joint effort (native-speaking and non-native-speaking translators) [G4]. The findings are statistically compared using one-way ANOVA test. Results show a statistically significant difference in the use of the pragmatic marker well and in the use of the three phonological patterns among the four groups. The findings are interpreted and implications are offered for the pragmatic gap and linguistic competence between native-speaking and non-native-speaking translators.

A Four Novel Energy Pattern Factor Method for Computation of Weibull Parameter in Impact Strength Reliability of Fibre-Reinforced Concrete

2018 ◽  
Vol 7 (3.12) ◽  
pp. 272
Author(s):  
Gayathri R ◽  
Murali. G ◽  
Parthiban Kathirvel ◽  
Haridharan M.K ◽  
Karthikeyan. K
Keyword(s):  
Reinforced Concrete ◽  
Impact Strength ◽  
Shape Parameter ◽  
Failure Strength ◽  
Fibre Reinforced Concrete ◽  
Test Results ◽  
Weibull Parameter ◽  
Impact Failure ◽  
Novel Method ◽  
The Impact

Impact strength data is a noteworthy factor for designing airport pavements, civilian and military structures etc and it is ought to be modelled precisely. In order to achieve an appropriate modelling data, it is important to select a suitable estimation method. One such commonly used statistical tool is the two parameter Weibull distribution for modelling impact failure strength accurately besides the variations in test results. This study statistically commandsthe variations in the impact failure strength (number of blows to induce failure) of fibre reinforced concrete (FRC) subjected to drop hammer test. Subsequently, a four-different novel method for the computation of Weibull parameter (Shape parameter) based on the earlier researchers test results has been proposed. The accuracy of the proposed four novel method is demonstrated by comparing with power density method and verified with goodness of fit test. Finally, the impact failure strength of FRC is offered in terms of reliability. The proposed four NEPFM is very suitable and efficient to compute the shape parameter in impact failure strength applications. 

scholarly journals PENGARUH VARIASI KONSENTRASI EKSTRAK DAUN BELIMBING WULUH (Averrhoa bilimbi L) TERHADAP KARAKTERISTIK SEDIAAN SALEP DENGAN MENGGUNAKAN BASIS PEG 4000 dan PEG 400

2021 ◽  
Vol 2 (02) ◽  
pp. 7
Author(s):  
Tri Puji Lestari
Keyword(s):  
Leaf Extract ◽  
Homogeneity Test ◽  
Test Results ◽  
Peg 400 ◽  
Cell Tissue ◽  
Peg 4000 ◽  
Significant Difference ◽  
Ointment Formulation ◽  
The Difference ◽  
One Way Anova

ABSTRAK Daun Belimbing Wuluh (Averrhoa bilimbi L) memiliki kandungan tanin dan flavonoid. Kandungan Flavonoid dan Tanin yang terdapat dalam belimbing wuluh mampu memberikan efek untuk menyembuhkan kulit yang mengalami kerusakan jaringan sel akibat luka bakar. Ada beberapa cara untuk pemanfaatan Daun Belimbing Wuluh antara lain dengan dibuat dalam sediaan salep. Pada penelitian ini salep dibuat dengan variasi konsentrasi ekstrak daun belimbing wuluh sebesar 10%, 15%, dan 20%  mengguankan basis PEG 4000 dan PEG 400. Ekstrak daun belimbing wuluh diperoleh menggunakan metode maserasi dengan menggunakan etanol 70% sebagai pelarutnya. Salep yang sudah dibuat kemudian dilakukan uji karakteristik meliputi uji organoleptis, homogenitas, daya lekat dan uji daya sebar. Hasil uji organoleptis dan homogenitas di analisa secara deskrisptif kemudian hasil uji daya lekat dan uji daya sebar di analisa dengan menggunakan analisa statistik one-way ANOVA.  Hasil penelitian menunjukan bahwa salep berbentuk semipadat dengan warna hijau muda sampai hijau kehitaman. Hasil uji homogenitas di dapatkan untuk ketiga formula adalah homogen. Nilai daya sebar pada ketiga formula menunjukan perbedaan yang signifikan, pada hasil uji daya lekat dan pH didapatkan tidak ada perbedaan yang signifikan terhadap ketiga formulasi. Dengan demikian perbedaan konsentrasi zat aktif yang digunakan berpengaruh terhadap daya sebar sediaan salep ekstrak daun belimbing wuluh. Kata kunci: Averrhoa bilimbi L; Salep; PEG   ABSTRACT Carambola leaf Wuluh (Averrhoa bilimbi L) contains tannins and flavonoids. The content of flavonoids and tannins contained in starfruit able to give effect to heal skin damaged cell tissue from burns. There were several ways for  utilization  of  Averrhoa  bilimbi  L.  among  others,  made  some  preparations, especially ointment formulation. This study aims to formulate leaf extract ointment preparation starfruit (Averrhoa bilimbi L) with various concentrations of 10%, 15%, and 20% using the PEG 4000 and PEG 400 as a base. Leaf extract obtained from meserasi leaf Averrhoa bilimbi  L  with  70%  ethanol. The ointment that has been made is then subjected to characteristic tests including organoleptic tests, homogeneity, adhesion and spreadability tests. The results of the organoleptic test and homogeneity were analyzed descriptively, then the results of the adhesion test and the spreadability test were analyzed using one-way ANOVA statistical analysis. The results showed that the ointment was semisolid, light green to blackish green. The homogeneity test results obtained for the three formulas are homogeneous. The value of the spreadability of the three formulas showed a significant difference, the results of the adhesion and pH test showed no significant difference between the three formulations. Thus the difference in the concentration of the active substance used affects the spreadability of the starfruit leaf extract ointment. Keywords: Averrhoa bilimbi L; ointment; PEG

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