Effect of Microhardness on Chemical Degradation

Effect of Microhardness on Chemical Degradation Abstract Objective: The aim of this study was to evaluate the effect of chemical degradation media associated with brushing on surface roughness (Ra) and Knoop microhardness (KHN) analyses of different composites. Material and Methods: Eighty specimens were prepared for each composite: Grandio SO (Voco), Amaris (Voco), Filtek Supreme (3M/ESPE), Filtek LS (3M/ESPE). The specimens were divided into four groups according to the immersion in chemical degradation media for 7 days: artificial saliva (control), heptane, 0.02M citric acid, 70% ethanol. The surface of specimens was submitted to 10950 brushing cycles (200g load) in an automatic tooth-brushing machine with abrasive slurry. Surface roughness and microhardness measurements were obtained at baseline, after immersion in chemical degradation media and after brushing. Data were submitted to three-way repeated measures ANOVA and Tukey’s test (pResults: The KHN means for composites were: Grandio (153.5 ±35.9)a, Filtek Supreme (87.0 ± 24.9)b, Amaris (64.5 ±24.5)c, LS (69.0 ±15.3)c; for storage media: artificial saliva (97.3 ±46.7)a, ethanol (93.3 ±49.9)a, citric acid (95.8 ±42.1)a, heptane (87.6 ±36.7)b; and after treatments: after chemical degradation (104.8 ±49.7)a, baseline (93.8 ±42.5)b, after brushing (81.9 ±36.5)c. The Ra results for composites were: LS (0.15 ±0.25)a, Grandio SO (0.19 ±0.24)ab, Filtek Supreme (0.20 ±0.22)ab, Amaris (0.23 ±0.37)b; for storage media: artificial saliva (0.18 ±0.31)a, heptane (0.18 ±0.25)a, ethanol (0.20 ±0.26)a, citric acid (0.21 ±0.28)a; and after treatments: brushing (0.11 ±0.14)a, after chemical degradation (0.23 ±0.32)b, baseline (0.24 ±0.32)b. Conclusions: Brushing after chemical degradation reduced surface roughness values. In general, chemical degradation did not affect composites roughness, but microhardness was significantly reduced. Heptane produced the biggest reduction in composites microhardness. Clinical Relevance: The food-simulating solutions and brushing simulating alter the composites properties, and these alterations are material-dependent. Keywords: composites, chemical degradation, brushing, Knoop microhardness, surface roughness. Introduction Improvements on the composition and mechanical properties of resin-based materials along with increased esthetic demands have resulted in the enlarged use of direct composite restorations in anterior and posterior teeth [1,2]. These improvements provided more strength and durability to the composite restorations under the conditions of the oral environment. Most of the available composites contain a polymer matrix of dimethacrylate monomers, such as Bis-GMA, UDMA, and TEGDMA (organic phase), inorganic filler particles (dispersed phase) coated with a methyl methacrylate-functional silane coupling agent to bond the filler to the organic matrix, a photoinitiator system to allow photoactivation by light units and other minor additions including polymerization initiators, stabilizers and coloring pigments [3-5]. However, the critical oral environment conditions (pH changes or humidity) may increase the composite biodegradation over time [6]. Under oral conditions, dental materials may be exposed either intermittently or continuously to chemical agents present in saliva, food and beverages [1]. Previous studies have shown that some dietary foods and beverages can cause surface degradation of restorative materials [7-14]. Their constituents can soften the organic phase and promotes disintegration of the dispersed phase, altering the surface hardness [1,15]. Besides of chemical environment, the toothbrushing is another condition that influences the longevity of composites restorations in vivo. Although toothbrushing plays an important role in oral hygiene, the effects of abrasion constitutes another important issue on dental materials wear processes, which can result in alterations in surface roughness, loss of contour, staining and plaque retention [16]. There are several types of composites nowadays, such as nanohybrid, nanofill and microhybrid, which have the similar polymer matrix composition. However, the inorganic phase (size, type and distribution of filler particles) are different. Therefore, the effects of chemical degradation liquids and toothbrushing on surface roughness and microhardness of these types of composites must be reported. Thus, the aim of this study was to evaluate the effects of chemical degradation associated with toothbrushing on surface roughness and microhardness of different composites. The null hypothesis tested was that the immersion in chemical degradation media and brushing are not able to modify the surface roughness and microhardness of the tested materials. Material and Methods Specimens preparation Eighty cylindrical specimens of each composite were fabricated (shade A3) using a metallic matrix with 2 mm in height and 3 mm in diameter. A mylar strip was placed over the composite and pressed with a glass plate to provide a flat surface, being removed after curing. The composites were applied in increments of 2 mm and cured on the top surface using LED photocuring unit (Elipar Freelight 2, 3M/ESPE, St. Paul, MN, USA) at 1200 mW/cm2 power density, activated for 40 s. After curing, they were stored in individual containers with deionized water for 24 h. Then, they were polished using a sequence of 1200, 2400 and 4000 grit aluminum oxide abrasive disks (Extec, Enfield, CT, USA) in a polishing device (DP-10, Panambra, Sà £o Paulo, Brazil). After polishing, all the specimens were immersed in deionized water at 37  ºC for 24 h. Four direct restorative materials were tested, as described in Table 1. Knoop microhardness measurements The microhardness measurement was performed with a microhardness tester (FM-700, Future-Tech, Tokyo, Japan), Knoop tip, under 25 g load for 10 s. Three indentations were performed 100  µm apart from each other, at the surface of the specimens. The means were determined as Knoop Hardness Number (KHN). Surface roughness analysis The mean surface roughness (Ra) was evaluated using a profilometer (MaxSurf XT 20, Mahr, Goettingen, Germany). The diamond stylus moved 2.5 mm long starting the first measurement 0.2 mm from the lower area of specimen. Three profile measurements were performed for each specimen at intervals of 0.25 mm and a final average was used. The mean Ra values were determined with a cut-off value of 0.8 mm, a transverse length of 0.8 mm, and a stylus speed of 0.1 mm/s. Chemical degradation media immersion The specimens of each composite were randomly divided according to the food-simulated substances tested (n=20). The solutions tested are mediums recommended by FDA (1976) to be used as food-simulating liquids [17]. Heptane P.A. (Synth – Labsynth, Diadema, Sà £o Paulo, Brazil) was used to simulate butter, fat meals and vegetable oils. Citric acid 0.02M (Synth) simulated beverages, vegetables, fruits and candies. Ethanol 70% (Zulu Hospitalar 70% Companhia Nacional de à lcool, Piracicaba, Sà £o Paulo, Brazil) simulated alcoholic beverages and mouthrinses. Artificial saliva was used as control and prepared according to Gohring et al. [18] using 22.1 mmol/l hydrogen carbonate, 16.1 mmol/l of potassium, 14.5 mmol/l sodium, 2.6 mmol/l hydrogen phosphate, 0.8 mmol/l boric acid, 0.7 mmol/l calcium, 0.4 mmol/l thiocyanate and 0.2 mmol/l magnesium. The specimens were kept in individual vials with 2 ml of each solution for 7 days at 37  ºC. After this period, the specimens were washed thoroughly, and stored in deionized water at 37  ºC, for 24 h. The microhardness and surface roughness were evaluated. Brushing protocols Subsequently, the experimental units were subjected to brushing abrasion in an automatic toothbrushing (TB) machine (ODEME Biotechnology – Joaà §aba, Santa Catarina, Brazil) which imparted reciprocating motion to 6 soft bristle toothbrush heads (Sanifill Ultraprofissional, Hypermarcas – Sà £o Paulo, Brazil). This apparatus provides linear brushing movements across the specimens at a speed of 120 cycles per min at 37 °C, with a double pass of the brush head over the surface. The top surface of resin composites cylinders were submitted to 10950 brushing stokes under a vertical load of 200 g with abrasive slurry, simulating one year of clinical situation [19]. The abrasive slurry consisted of fluoridated dentifrice (Colgate Tripla Aà §Ãƒ £o, Colgate-Palmolive, Sà £o Paulo, Brazil) and artificial saliva, in a ratio of 1:3, by weight [20]. Toothbrushes were replaced after the completion of each brushing cycles. After brushing, the specimens were kept in deionized water at 37 ºC, for 24 h. At the end of this protocol, the microhardness and surface roughness was obtained. Statistical analysis This experiment followed a factorial scheme of the 4x3x4 type. The experimental variables under study were composites [Grandio, Amaris, Filtek LS, Filtek Supreme], time [baseline, after chemical degradation (CD) and after brushing (TB)] and the food-simulating media [artificial saliva (AS), heptane (H), citric acid (CA) and ethanol (E)]. The variable responses were the mean roughness measurement value obtained in profilometer, and the average of three microhardness readings. Data were submitted to statistical analysis using the computer software Statistica for Windows (Statsoft, Tulsa, OK, USA). The inferential statistics consisted of three-way repeated measures ANOVA (composites, time, and chemical degradation media), in which the variable time was considered as a repeated factor, followed by Tukey’s test. The level of significance was the conventional value of 5%. Results Microhardness evaluation The mean KHN values of the composites after chemical degradation media are shown in Figure 1. The application of RM-ANOVA showed significant differences for the factors composites (p=0.0001), time (p=0.0001) and chemical degradation (p=0.0001). Grandio SO composite presented the highest KHN values for all times tested. Amaris and Filtek LS exhibited values significantly lower than Filtek Supreme and Grandio SO (Table 2). For the chemical degradation media factor, the immersion in heptane produced the lowest microhardness means, compared to the other tested media (Table 3). Regarding the different times, the microhardness (KHN) values significantly increased after immersion in chemical degradation media and decreased after brushing, compared to baseline means (Table 4). Surface roughness analysis The means of roughness surface (Ra) for the composites are shown in Figure 2. The application of RM-ANOVA showed no significant differences for composite (p=0.034) and time (p=0.626) factors. The roughness means obtained for Amaris composite were significantly higher than Filtek LS. Grandio SO and Supreme exhibited intermediate means (Table 2). For the chemical degradation media, no significant differences were obtained for surface roughness (Table 3). The Ra means after brushing were lower than at baseline and after chemical degradation CD (Table 4). Discussion The chemical environment is one aspect of the oral conditions which has an appreciable influence on the in vivo degradation of composites [21]. Some chemicals substances from food and drinks can lead to surface degradation of composite restorations, resulting in unaesthetic appearance and increased surface roughness, accelerating the wear of dental materials [22,23]. This degradation is mainly due to the softness of composite matrices with exposure to organic acids and various food and liquid constituents [24,25,12]. Previously published studies have reported that acidic conditions show a tendency to degrade glass ionomer cements, polyacid modified composite resins, and composite resins [9,26,10,27,11]. The present study was performed to investigate the Knoop microhardness and surface roughness of four composites, before and after simulating oral conditions. Hardness is defined as the resistance to permanent indentation or penetration [28,1]. It is used to predict the wear resistance of a material and its ability to cause abrasion opposing tooth structure [28]. The composites exposed in food-simulating media can suffer chemical softening, reducing their physico-mechanical properties. Changes in the composite hardness usually occur within the first 7 days after exposure to chemical solutions [21]. Therefore, this study conducted the initial readings of the hardness in the specimens after post-cure [1], and another reading after the exposure period of immersion. In the present study, specimens stored in heptane showed significantly reduction in microhardness, as also observed previously [14,28]. Heptane simulates butter, fatty meals and vegetables oil [14,1] and may damage the resin matrix,[12,28] producing cracks in the interface, and consequently, weakening the material.[14] It is questioned if alcohol-containing beverages may compromise the longevity of composites restorations [29], since it presents the potential of damaging polymers [1,12], by fully penetrating the resin matrix and promoting the release of unreacted monomers [13]. The partial dissolving of the resin matrix may result in the degradation of the filler-matrix interface, thereby impairing the flexural strength and hardness [14]. In this study, the concentration of ethanol solution (70%) was used according to previous [28] but it showed no significant effect in the microhardness of composites. The differences in hardness values compared to previous studies could be related to the surface characteristics of the composites, filler distribution and conversion rate [30]. Furthermore, the period of 24 h of storage before immersion in ethanol may lead to complete polymerization of the composites, reducing the presence of unreacted monomers on the surface [1,14]. The effects of intraoral organic acids, as citric acid, besides producing tooth erosion, can cause surface degradation of composites [9], favoring the breaking of bonds in Bis-GMA molecules of composites [24,11]. Despite of others studies that citric acid reduced the hardness of composites [7,9], in this study no differences were observed in the microhardness of the composites when immersed in citric acid for 7 days. Nevertheless, the period of storage may have been insufficient to promote differences in the mechanical properties of the specimens’ surface [7,14]. Differences in microhardness means among the composites exposed to the tested solutions were found and are related to their composition and particle content [14,29]. Grandio SO, Filtek Supreme and Amaris have similar matrix composition (Bis-GMA, UDMA, TEGDMA), however, differ in size and amount of filler particles (Table 1). The higher resistance of Bis-GMA to the degradation effects of immersion media can be explained by the fact that bis-acryl resin composite materials contain bifunctional acrylates, which cross-link to provide increased mechanical strength and resistance to weakening in the presence of solvents [28,31]. Grandio SO and Filtek Supreme present nanoscale particles, which provide better mechanical resistance compared to hybrid resins, superior polishing than microfilled resins, higher strength and reduced polymerization shrinkage [32]. Due to their nanoscale, these materials showed the highest microhardness values in this study. By the other hand, Filtek LS is constituted of silorane, with quartz and yttrium fluoride as inorganic filler, which increased hydrophobicity and reduced water sorption [33]. Differences in microhardness among Filtek LS and others composite could be attributed to the lower filler content (76% w/w), as observed by Yesilyurt et al. [14]. Therefore, the differences in composites compositions could have contributed to the differences in hardness. After simulated toothbrushing, there was a reduction in microhardness values. This fact may be due to changes on the surface of the resin matrix when immersed in the solutions before brushing. According to a previous study [2], the immersion in food-simulating media increased the exposure of filler particles by softening the matrix. Additionally, toothbrushing can change the surface of composites [2,34,35]. In clinical situation, the consumption of food or beverages occurs before brushing habits, making this association clinically relevant. Although an increase of the composite surface roughness and degradation after brushing have been previously reported,[2] significantly lower roughness means were obtained after brushing in this study. Likewise, previous studies showed that most of composites did not present significant changes by the immersion on chemical degradation media in surface roughness over time [2,9,15]. This study found differences on surface roughness of mycrohybid, nanofill and nanohybrid composites, as results of their differences in their compositions. Filtek LS, myycrohybrid composite, had the lowest surface roughness, probably due to low filler content. Filtek Supreme e Grandio SO had an intermediate smoother texture, whereas Amaris showed the roughest surface. Nevertheless, despite of these initial differences, the immersion in chemical solutions did not interfere in the final surface roughness. However, interaction between immersion in food-simulating media and simulated brushing decreased surface roughness, as observed by Turssi et al. [20] This may be attributed to the reaction of the solutions with the polymer matrix. Toothbrushing after the immersion on food-simulating media resulted in the removal of part of the organic matrix around the loosen fillers [2]. Then, the softened matrix have become mixed with the abrasive slurry, decreasing its abrasive potential [20]. Roughness surfaces of composite favors the accumulation of plaque, gingival inflammation, superficial staining and secondary caries. It is noteworthy that the effect of brushing on the composites depends on several factors, such as the type of toothpaste, type and shape of the brush bristles, the proportion of deionized-water solution, as well as speed and weight applied during simulation process. As these parameters were standardized for all groups, it can be suggested that the surface roughness varies with the size, hardness and percentage of composite particles, as reported previously [20,36]. The different treatments tested resulted in alteration of composite properties, and these alterations were material-dependent; thus, the null hypothesis tested was rejected. The present study is important for guiding the improvements of the present composite resins against the challenges they will face during clinical service. It is also relevant to state that esthetics represents only one of the reasons for composite resin restorations failure. Improvements in other areas such as bonding degradation, material deterioration and ability to prevent caries progression/activity should be also considered. Conclusion According to the limitations of this study, it can be concluded that: The microhardness means of the tested composites were influenced by the material; Toothbrushing reduced Ra values of the materials tested, but the solutions used for chemical degradation did not affect the results. Conflict of Interest The authors declare that they have no conflict of interest.

Eavan Boland Poems

The poem â€Å"This Moment† sees Boland take her inspiration for ordinary everyday domestic and common place scenes. It is a poem of intense tenderness that takes an ordinary event of a child running into its mother’s arms and deems it worthy of artistic expression. Boland uses very short sentences to that culminate to the climax of the embrace between mother and child. She uses images that are sensual and language that is rich and suggestive. The speaker’s appreciation of the everyday extends even to ripening of an apple, a process so slow that almost nobody notices it. These are things that happen out of sight. Boland uses the image of light to further this idea of things happening out of sight, as it is suggestive of people engrossed in their own activities. Perhaps, overall, this poem is a celebration of motherhood. It highlights the mysterious beauty of things we are usually too busy to notice such as moths swooping, stars rising and the beauty of the moment when a mother takes a child up in her arms. The entire poem is a series of images that lead up to this moment The Pomegranate In â€Å"The Pomegranate† Boland fuses together the universal truth of Greek myth to the modern day woman. She draws on the legend of Ceres and Persephone to symbolise the poets own maternal instincts, that is the parental desire to protect and shield the child from any harm that may come their way. Her daughter’s uncut fruit leads her to recall the pomegranate. Boland cleverly creates her own physical environment which mirrors the mythological landscape of Hades â€Å"winter and the stars are hidden†. She uses images in a symbolic way, particularly the image of the pomegranate which is a fruit associated with temptation. In this poem, Boland uses overtones of the Garden of Eden. She suggests that all those who eat this fruit are drawn into darkness. Boland then uses this motif of darkness to create a bleak atmosphere. It can be argued that the process that this poem deals with is that of sexual awakening. Boland uses the myth of Ceres and Persephone to provide an insight into the relationship between mother and daughter. She concludes with a terse promise that â€Å"she will say nothing†. She realises that the temptations that life will offer cannot be stunted by a mother’s love. â€Å"If I defer the grief, I will diminish the gift†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. ut what else can mother give her daughter buts such beautiful gifts in time† Love â€Å"Love† is a beautiful poem which celebrates an intense moment of connection. This is an honest poem which deals with complex emotions. Much like â€Å"The Pomegranate† â€Å"Love† breeds new life into ancient mythology. It is a deeply personal expression of a powerful emotion. Bolan d cleverly uses simple and restrained language to mirror the theme of this poem. In the first stanza, the run-on lines mirror the emotional rush of the lovers’ first meeting. Boland’s lack of punctuation allows the poem to become more honest and sincere. As with any of Boland’s poetry, she moves between the past and the present. This movement is reflected in Boland’s choice of tense. She opens in the past tense â€Å"Once we lived†, however she changes to the present â€Å"I am†. The sands of time are not allowed to settle. All of this adds to Boland’s appeal. What Boland does come to realise is that the past is but a shadow and for all of its passion, it can never be relived. The Shadow Doll This poem â€Å"The Shadow Doll† is a highly symbolic poem. The glass dome that encases the shadow doll can be viewed as being symbolic of the expression that the institution of marriage represents for women. She opens the poem with an image of the wedding dress that is rich in detail. She comments on its blazing whiteness. Yet the speaker feels nothing but pity for the â€Å"glamorous doll† for all its glamour is an â€Å"airless glamour† as it remains contained beneath a glass dome. Boland imagines the doll having witnessed the intimate details of family life as a detached observer. She realises that the doll is a prisoner behind the glass. It may never speak or express the things it has experienced. It is forced to remain forever â€Å"discreet†. Boland creates a powerful sense of claustrophobia in the final lines as she repeats the word â€Å"pressing† which emphasises her own sense of desperation and urgency. For Boland this motion of pressing down mirrors the confines and restraints and the pressure of marriage. The power of the word â€Å"locks† refers to the vows of marriage which are reinforced by tradition and society. For the speaker, these locks will soon click into place, trapping her in the marriages â€Å"airless glamour†. White Hawthorn in the West of Ireland This poem draws on Irish superstitions. In essence the poem can be read as a beautiful and unique commentary about being Irish. In this poem Boland contrasts two very different worlds. She presents the west as an almost magical place where the ordinary rules of nature have been suspended. Boland’s language creates a haunting, mystical atmosphere â€Å"the hard shyness of Atlantic light†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. under low skies have splashes of coltsfoot, the superstitious aura of the hawthorn† In contrast the world of the suburbs is presented as a cultured area, full of â€Å"lawnmowers† and â€Å"small talk†. The poem celebrates the wild and magic west, as a refuge from the choking boredom of the urban way of life. For Boland it is almost sacriligous to constrain this wild and almost sacred plant; by bringing it indoors it was believed that it would be risking a terrible punishment from supernatural forces â€Å"a child might die perhaps, or a unexplainewd fever speckled heifers† In this poem the hawthorn serves as a link to our past and the journey the speaker undertakes is a journey back to the beay=uty of the west and its traditions. Boland uses of run on lines serve both to capture her excitement as well as to mirror the growth and fluidity of the wild hawthorn. She concludes this poem by commenting on the language spoken by these people; that is the language of superstition which Boland finds both fascinating and enthralling. The War Horse In â€Å"The War Horse†, the horse becomes a poetic symbol for the violence that has characterised Irish history. The flowers become the victims of war. They are the â€Å"expendable† numbers who are crushed by the great machines of war, scarified for some greater cause. The parallel between our casual reactions to the crocus’ death is designed to reflect our lack of concern with the endless tally of statistics in Northern Ireland. This poem is a highly crafted poem. Boland attempts to illustrate the carefree attitude of most people to the violence in the very structure of the poem itself as she is not confined or restrained by the rules of poetic verse. The poem is a graphic and vivid portrayal of the atrocities of war. She uses the damaged flowers in her garden to highlight the horrible and repulsive images of mutilated bodies throughout the poem. Boland captures the attitude of indifference. She concludes this poem with a powerful image of a landscape destroyed by conflict. The Child of Our Time â€Å"The Child of Our Time† transcends into meaninglessness of death and violence to produce something beautiful. For a moment the beauty of this poem eclipses the bitterness and hatred that have dogged Irish history. Boland invites us to find a â€Å"new language† so that we can put an end to violence that has resulted in this tragedy. This is a very honest, sincere and loving poem. Boland creates a sense of haunting finality in the simplicity of â€Å"you dead†. She employs words such as â€Å"we† and â€Å"our† to make us share some of the responsibility in the child’s death. The brutal meaninglessness of the killing is reflected in Boland’s choice of imagery. The image of â€Å"broken limbs† and â€Å"the empty cradle† serve to reinforce the tragedy. She concludes the poem with the effective use of alliteration. The soft sound of the S’s are tender and soothing â€Å"sleeping in a world, your final sleep has woken†

Civil War Position Paper Essay

The American Civil War almost tore early America and its population apart. Still today people debate weather slavery was the primary cause for the war. In this paper I will explain why I believe slavery was not the primary cause of the American Civil War. Also I will point out many other factors that may have played a bigger role in the cause of the Civil War. Southern states believed STRONGLY in states’ rights. States’ rights are the belief that one should be loyal to their state instead of the country as a whole, also they believed that states should be able to make their own laws to their liking without having to answer to the country. This alone created tension between the southern states and the northern states for northern states felt that the constitution clearly stated that states can create laws as long as they do not conflict with the laws of the country. In addition to the tension between the north and south congress placed a tax on goods bought outside of the country otherwise known as tariffs. In 1828 and 1832, congress raised tariffs higher and higher. These taxes were hated by the southern states for they did not have many factories unlike they’re northern counterparts, and thus they paid tariffs more often. In one instance a southern state refused to pay the tariff nullifying the tax congress had placed this event known as the nullification crisis drove the wedge between the north and south further The bloody fighting between northern and southern voters in Kansas was another step in the path of the civil war. Due to the popular sovereignty act suggested by Senator Stephen Douglas the people where able to vote on whether that territory would’ve been a free state or a slave state, this caused voters from both the north and the south to pour into these states hoping to tip the scale in their favor in doing this conflict between the two erupted as homes were burned and people were murdered. In conclusion I do not believe that slavery was the primary cause of the civil war. My reason for thinking this is because of all the events that the country had to push though on top of slavery. For starters states rights, tariffs, nullification crisis, the Kansas Nebraska act, and the bleeding Kansas scare all played a bigger part in the cause of the civil war rather then slavery.

Essay about Eduardo Bonilla-Silvas Book, Racism Without...

Race has been an issue in North America for many years. Eduardo Bonilla-Silva discusses the new racism in his book, Racism without Racists. Bonilla-Silva classifies the new racial discrimination as color blind racism. Color blind racism is then structured under four frames (26). Color blind racism is believed to have lead to the segregation of the white race from other minorities called white habitus. Color blind racism and white habitus has affected many people, whom don’t even realize that they are, have been or will be affected. Color blind racism is an â€Å"ideology, which acquired cohesiveness and dominance in the late 1960s, explains contemporary racial inequality as the outcome of nonracial dynamics,† according to Bonilla-Silva†¦show more content†¦The reasoning for abstract liberalism usually deals with equal opportunity, choice and individualism as a defense to white privilege (28). In this frame, it says that you can’t allow preferential treatment to certain groups to promote racial equality because equal opportunity is available for everyone. This denies that there are any advantages to whites based from history. Cultural racism uses the â€Å"they don’t have it altogether† statement (39). â€Å"The essence of the American version of this frame is â€Å"blaming the victim,† arguing that minorities’ standing is a product of their lack of effort, loose family organization, and inappropriate values,† stated Bonilla-Silva (40). Kara a MU student states, â€Å"black people that I’ve met†¦I don’t want to say waiting for a handout, but to some extent, that’s kind of what I’m like hinting at,† when asked what she thought about â€Å"blacks lacking motivation† (40). Other students used a kinder response to the above question leading to a family structure issue, a lack of education, and financially that blacks had to get a job at an earlie r age than whites (41). Cultural racism is the basis of most racism today. The blame game is used in all situations. People’s egos don’t like toShow MoreRelatedDoes Racism Still Exist?1549 Words   |  7 PagesDoes racism still exist? This is one of the countless controversies between people today in which many people might answer â€Å"no†. Others may agree with Eduardo Bonilla-Silva, a sociology professor at Duke University. Bonilla-Silva argues that racism still exists, but has become more subtle since the end of segregation. Bonilla-Silva refers to this new racism as color-blind racism. This term is defined by Bonilla-Silva in his book, White Supremacy and Racism in the Post-Civil Rights Era, as, A newRead MoreStill Seeing Of Black And White?1562 Words   |  7 PagesBlack and White? Does racism still exist? This is one of the countless controversies between people today in which many people might answer â€Å"no†. Others may agree with Eduardo Bonilla-Silva, a sociology professor at Duke University. Bonilla-Silva argues that racism still exists, but has become more subtle since the end of segregation. Bonilla-Silva refers to this new racism as color-blind racism. This term is defined by Bonilla-Silva in his book, White Supremacy and Racism in the Post-Civil RightsRead MoreRacism Without Racists, By Jordan Peele797 Words   |  4 Pagesform of covert racism existing in a post- Jim Crow era. Similarly, Eduardo Bonilla- Silva’s book Racism Without Racists acknowledges the contemporary system of racism or â€Å"new racism,† a system of covert racism currently utilized to subjugate minorities. In this section, I will analyze distinctive parts of Get Out that portray white liberal attitudes towards African Americans and compare it to Racism Witho ut Racists in order to illustrate the common acknowledgement of a new racism. Keep in mind, itRead MoreSegregation Within The Housing Market843 Words   |  4 PagesWhen people talk about racism throughout modern society, a question that emerges is â€Å"How does modern racism influence residency and neighborhoods in economic and political viewpoints?† Some argue that segregation within the housing market has been a devastating, long-term, issue for African Americans as a result of racial zoning due to income along with race, while others believe that the United States has indeed enforced policies to prevent blacks from obtaining and maintaining wealth to merge withRead MoreThe Linguistics Of Color Blind Racism1262 Words   |  6 PagesEduardo Bonilla-Silva is a professor of sociology. He has written multiple books about color racism. The linguistics of color blind racism: how to talk nasty about blacks without sounding â€Å"racist† is one of the works that incudes color racism that I will be discussing. This title describes how other races that are racists are trying to hide so they find ways to speak about the blacks trying to not sound racist. I am in agreement with Silva’s work because I have witnessed instances where semantic