Journal of Modern Research in English Language Studies最新文献_第2页

The effect of oat products fermented by probiotic bacteria on the blood biochemical parameters in experimental rats 益生菌发酵燕麦制品对实验大鼠血液生化指标的影响

Journal of Modern Research in English Language Studies Pub Date : 2022-07-05 DOI: 10.21608/jmr.2022.117550.1087

A. Abdelshafy, E. El-Naggar, M. Kenawi

{"title":"The effect of oat products fermented by probiotic bacteria on the blood biochemical parameters in experimental rats","authors":"A. Abdelshafy, E. El-Naggar, M. Kenawi","doi":"10.21608/jmr.2022.117550.1087","DOIUrl":"https://doi.org/10.21608/jmr.2022.117550.1087","url":null,"abstract":"Fermentation of oat by probiotic bacteria enhances its nutritional value and can be considered as a significant source of bioactive compounds and alive probiotics for the human body. Moringa leaves powder (MLP) at the levels of 0.25 and 0.50% were used as an additional prebiotic source to supply the oat fermentation by Lactobacillus plantaram ATCC 14917 and Lactobacillus delbrueckii ssp . Bulgaricus EMCC 11102 and produce healthier oat products. The results indicated that oat products supplemented with MLP at a level of 0.50% and fermented by L. plantaram ATCC 14917 and L. delbrueckii ssp. Bulgaricus EMCC 11102 showed the highest probiotic counts (10.61 and 10.11 log cfu/g, respectively) and exhibited more survival of probiotics than oat fermented products without MLP (p > 0.05) throughout the storage period. Moreover, fermented oat products supplemented with MLP at the same level showed higher activity of reducing both fasting and postprandial blood glucose levels in the experimental rats. These products may have a potential role as effective vehicles for probiotics and control of type 2 diabetes mellitus (DM) in the future.","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86018712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cytotoxic Activities of Cymbopogon citratus Extracts Three types of human cancer cell lines were tested: Lung Carcinoma (A549), Breast Cancer (MCF-7) and Hepatocellular Carcinoma (Hep G2) 对肺癌(A549)、乳腺癌(MCF-7)和肝细胞癌(Hep G2) 3种人癌细胞系进行了细胞毒活性测定。

Journal of Modern Research in English Language Studies Pub Date : 2022-01-01 DOI: 10.21608/jmr.2021.90284.1081

H. Sayed, M. Issa, M. Mahmoud, Hamadi A. Ismail, A. Darwish, E. Abdelkader

引用次数: 0

Phytochemical Screening and Antioxidant Activity of some Egyptian Medicinal Plants 一些埃及药用植物的植物化学筛选及其抗氧化活性

Journal of Modern Research in English Language Studies Pub Date : 2022-01-01 DOI: 10.21608/jmr.2021.83376.1075

Heba Sayed, M. Issa, M. Mahmoud, E. Abdelkader, Hamadi A. Ismail

{"title":"Phytochemical Screening and Antioxidant Activity of some Egyptian Medicinal Plants","authors":"Heba Sayed, M. Issa, M. Mahmoud, E. Abdelkader, Hamadi A. Ismail","doi":"10.21608/jmr.2021.83376.1075","DOIUrl":"https://doi.org/10.21608/jmr.2021.83376.1075","url":null,"abstract":"Extracts of three leaves: Cymbopogon citratus, Hibiscus sabdariffa, and Lawsonia inermis were screened for phytochemicals in ethanol (80%), hexane, and ethyl acetate. The potential of plant extracts to scavenge free radicals such as DPPH, ABTS and FRAP (Ferric Reducing Antioxidant Power) was investigated. For all extracts, phytochemical analysis indicated the presence of terpenoids, steroids, tannins, anthocyanins, phenols and flavonoids with absence of fatty acids in ethanol 80% and ethyl acetate. Ethyl acetate extract of L. inermis achieved a high percentage of TPC and TFC, but it was higher in 80% ethanol of H. sabdariffa than the other extracts under study. Ethyl acetate extracted the highest TPC (66.8 ± 3.6 mg/100g) in C. citratus and 80% ethanol extracted the highest TFC (37.23± 2.05mg/100g). Ethanolic extract (80%) of the three plants' leaves showed a higher IC50 value than both ethyl acetate and hexane extracts. This indicates that 80% ethanol was the best solvent for extracting phenolic compounds and flavonoids. The “ABTS radical” scavenging activity was the highest for ethyl acetate extract of L. inermis. The lowest value was observed for hexane extract of both C. citratus and L. inermis. This study exhibited potential of ethanolic extracts (80%) of all plants for removing free radicals and their effectiveness to be a powerful antioxidant. Article information Received: 28 July 2021 Revised: 31August 2021 Accepted: 28 September 2021","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82987217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

POPULATION DYNAMIC OF HONEYBEE (Apis mellifera L.) DISEASES IN UPPER EGYPT 蜜蜂种群动态研究上埃及的疾病

Journal of Modern Research in English Language Studies Pub Date : 2022-01-01 DOI: 10.21608/jmr.2021.102990.1083

Mohamed A. Attala, H. Eshbah, A. Mohamed, Mahmoud Omar, Abdul Monem Ramadan

{"title":"POPULATION DYNAMIC OF HONEYBEE (Apis mellifera L.) DISEASES IN UPPER EGYPT","authors":"Mohamed A. Attala, H. Eshbah, A. Mohamed, Mahmoud Omar, Abdul Monem Ramadan","doi":"10.21608/jmr.2021.102990.1083","DOIUrl":"https://doi.org/10.21608/jmr.2021.102990.1083","url":null,"abstract":"A survey of honeybee diseases in Upper Egypt was done in four private apiaries during years 2018-19 and 2019-20 with a total of 530 colonies in four governorates (Sohag, Qena, Luxor and Aswan). The obtained data revealed that American foul brood (AFB), European foul brood (EFB), Chalk brood (CHB), Varroa mite and Nosema were recorded in Sohag. While European foul brood EFB, Chalk brood (CHB), Varroa mites and Nosema were found in Qena. Luxor and Aswan governorates showed infection with Varroa mite and Nosema only. Meanwhile, all the governorates in Upper Egypt where free from Stone brood, Sacbrood and acarina diseases. American foul brood (AFB) disease was recorded in Sohag only, appeared in April during the study and the infection increased gradually reaching the maximum of 22.47, 22.87% in July of 2018-19 and 2019-20, respectively. Infection decreased in November 2018-19 and December 2019-20. No infection was recorded in December, January, February and March. EFB was recorded in Sohag and Qena, and showed a maximum of 18.93% in July 2018-19 and 23.13% in August with significant differences. Fungal disease Chalkbrood (CHB) was also recorded in Sohag and Qena with maximum infestation of 25.60% in Sohag in April 2019-20 and 24.70% in Qena in April 2019-20. Varroa mite was most present in the apiaries in the four governorates with maximum percentage in December in Qena and January for Sohag, Luxor and Aswan during the two years of study. Nosema disease was recorded also in the four governorates from February to August in the two years of study, and the highest infection level was recorded in April and May. Article information Received: 27 October 2021 Revised: 8 December 2021 Accepted: 8 December 2021","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82939704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Survey of rodents and their ecto-parasites at some animal farms in Minia Governorate, Egypt 埃及米尼亚省一些动物养殖场啮齿动物及其外寄生虫调查

Journal of Modern Research in English Language Studies Pub Date : 2022-01-01 DOI: 10.21608/jmr.2021.83102.1074

A. El Roby, H. Hassan, H. Eshbah, Arwa Abd Elhakeem

{"title":"Survey of rodents and their ecto-parasites at some animal farms in Minia Governorate, Egypt","authors":"A. El Roby, H. Hassan, H. Eshbah, Arwa Abd Elhakeem","doi":"10.21608/jmr.2021.83102.1074","DOIUrl":"https://doi.org/10.21608/jmr.2021.83102.1074","url":null,"abstract":"The main objective of this research is to recognize the rodent species prevailing under Minia region, Egypt conditions. The current study revealed the presence of three main species of rodents living in two animal farms (Salah El-Deen village and El-Minia district), El-Minia Governorate. These species of rodent were: Rattus rattus frugivorous; Rattus norvegicus and Mus musculus. The ectoparasites associated with these rodents were: two insects i.e., the louse, Polyplax spinulosa; the Flea, Pullex irritans as well as six mite species i.e., Ornithonyssus bacoti; Glycyphagus sp.; Myobia murismusculi; Dermanssus gallinae; Liponyssoides sanguineus and Cheyletiella parasitivorax. The mite species, O. bacoti; Glycyphagus sp. and C. parasitovorax were recorded on the bodies of R. r. frugivorous and R. norvegicus, but these species of mites were recorded from the body of the house mouse, M. musculus. The two mite species M. murismusculi and D. gallinae were recorded in association with the three surveyed rodent species. The fleas were more common with R. r. frugivorous and M. musculus, but completely disappeared with R. norvegicus. The louse, P. spinulosa was recorded on R. r. frugivorous and M. musculus and completely missed on R. norvegicus. In Shosha animal farm (Samalote district), only two rodent species were recorded (R. r. frugivorus and R. norvegicus), and the mite species accompanied with both rodent species were O. bacoti; Glycyphagus sp.; M. murismusculi and C. parasitivorax. While the lice, P. spinulosa were found only on the body of R. r. frugivorous and completely disappeared on R. norvegicus. Article information Received: 1 July 2021 Revised: 20 August 2021 Accepted: 21 August 2021","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"104 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87740826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of treatment Osteosarcoma (Mg-63) cells with Vitamin C, Green tea and their combination (An-in vitro study) 维生素C、绿茶及其联合治疗骨肉瘤(Mg-63)细胞的体外研究

Journal of Modern Research in English Language Studies Pub Date : 2021-12-09 DOI: 10.21608/jmr.2021.102961.1084

Hiam Hussien, Amr H. Elbolok, Sherif Elgayar, Maii Ibrahim Ali Sholqamy

{"title":"Effect of treatment Osteosarcoma (Mg-63) cells with Vitamin C, Green tea and their combination (An-in vitro study)","authors":"Hiam Hussien, Amr H. Elbolok, Sherif Elgayar, Maii Ibrahim Ali Sholqamy","doi":"10.21608/jmr.2021.102961.1084","DOIUrl":"https://doi.org/10.21608/jmr.2021.102961.1084","url":null,"abstract":"Background: Osteosarcoma (OS) is the most common primary bone malignancy that affects children and adolescents. It is considered as a serious threat to the human health globally. For many years plants and natural constitutes components such as vitamin C (ascorbic acid), green tea have been used as anti-cancer drugs. Aim: The objective of this in vitro study was to investigate the effect of vitamin C, green tea and their combination on Mg-63 cell line. Material Methods: Treatment of cell line (Mg-63) by different concentrations of vitamin, green tea and their combination was done to evaluate the viability of the treated cells by SRB assay. Microscopic examination and were applied. Results: Regarding cytotoxicity effect of vitamin C, green tea and their combination on Mg-63cell line, it was noticed that cell distribution showed a variable arrest at different phase of cell division. Where there was nonsignificant difference of arrested cells of these drugs compared with its value in non-treated G0-G1 phase control cells while there was a significant elevated arrest of treated cells during the G2-M phase and the significant difference of cell arrest at G2-M phase was type of treatment related. Conclusion: From the results of the present study, we noticed that vitamin green tea and their combination have cytotoxic effect on Mg-63 cell line, it also induced an effect on the cell cycle distribution, resulting in apoptosis, necrosis and autophagy. Article information Received: 6 November 2021 Revised: 24 November 2021 Accepted: 24 November 2021","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75581446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CHARACTERIZATION OF SOME PLANT GROWTH-PROMOTING RHIZOBACTERIA ISOLATED FROM SUGAR BEET RHIZOSPHERE 甜菜根际部分植物促生根瘤菌的鉴定

Journal of Modern Research in English Language Studies Pub Date : 2021-12-09 DOI: 10.21608/jmr.2021.81655.1072

A. Sameh, M. Mahmoud, O. Dakhly

{"title":"CHARACTERIZATION OF SOME PLANT GROWTH-PROMOTING RHIZOBACTERIA ISOLATED FROM SUGAR BEET RHIZOSPHERE","authors":"A. Sameh, M. Mahmoud, O. Dakhly","doi":"10.21608/jmr.2021.81655.1072","DOIUrl":"https://doi.org/10.21608/jmr.2021.81655.1072","url":null,"abstract":"Plant growth promoting rhizobacteria (PGPR) are the rhizosphere bacteria that can be used to perform important functions such as increasing plant growth and protecting from several diseases caused by plant pathogens. This study aimed to characterize the native PGPR strains isolated from sugar beet rhizosphere and to evaluate their antagonistic activity against three of the common phytopathogen. Therefore, thirty bacterial strains were isolated from sugar beet rhizosphere and some of their morphological characteristics were investigated. Enzymatic (catalase, gelatinase & amylase) activities reflected a high degree of variability amongst strains. The antibiotic resistance to seven different antibiotics were significantly varied as revealed by zone-diameter around antibiotic disk. In vitro antagonistic activity against F. solani, F. oxysporium and R. solani, revealed a considerable diversity of antagonism. Many isolates were significantly reduced mycelial growth of F. solani (57%). Some isolates showed a good degree of antagonism against F. oxysporium (60%) while such activity against R. solani were varied from 0.0 to 56.5%. Partial-length of 16S rRNA gene (~ 1200 bp) was amplified and sequenced from two isolates, AM-15 and AM-26, that displayed a substantial antagonistic activity against studied pathogens. Nucleotide BLAST of AM-26 16S rRNA sequence showed the highest similarity (>99.5%) to many Pseudomonas chlororaphis subsp. aurantiaca, Pseudomonas chlororaphis & Pseudomonas sp. strains. However, AM-26 16S rRNA partial sequence shared a high similarity (>99.63%) with its corresponding sequence of Bacillus subtilis strain RRLKE01 (ACNO KF029595.1) and 99.54% similarity were detected with many other Bacillus subtilis and Bacillus sp. strains as well. Article information Received: 28 June 2021 Revised: 12 August 2021 Accepted: 29 August 2021","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86133313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Obesogenic and histopathological effect of monosodium glutamate on the adrenal gland of maternal and postnatal albino rats 谷氨酸钠对母、产后白化大鼠肾上腺的致肥及组织病理学影响

Journal of Modern Research in English Language Studies Pub Date : 2021-07-01 DOI: 10.21608/jmr.2021.72097.1064

Fatma Abdelbaki, A. Abobakr, Heba Abdallah, N. Hasssan

{"title":"Obesogenic and histopathological effect of monosodium glutamate on the adrenal gland of maternal and postnatal albino rats","authors":"Fatma Abdelbaki, A. Abobakr, Heba Abdallah, N. Hasssan","doi":"10.21608/jmr.2021.72097.1064","DOIUrl":"https://doi.org/10.21608/jmr.2021.72097.1064","url":null,"abstract":"Monosodium glutamate (MSG) is a flavoring food additive that’s found in many foods like chips, and fast foods. The aim of this study was to demonstrate the injurious effects of MSG on the adrenals of the female albino rats and its potentiality to cross the placental barrier carrying its injurious effects to their pups. Twenty-five female albino rats weighing about (200) g were mated then separated into two groups. The control group (10 rats), and MSG-treated Group(15 rats) received 10 g/kg MSG orally, dissolved in water at a concentration of 5 g/100 ml, starting on day 7 to 20 day of gestation.A day after delivery, animals were weighed, blood samples collected then sacrificed, and the adrenals were collected and examined by the light and electron microscope. Statistically, there was a significant increase in the body weight and decrease in adrenal weight of MSG-treated mothers and their pups, as well as a decrease in the corticosterone level in MSG-treated mothers. Histologically, MSG-treated mothers and pups showed many degenerative changes, with thinning of the capsule that was confirmed by Masson trichrome stain, a disorganized structure of Zona Golmeruloza and Zona Fasciculata, and areas of shedding and hemorrhage were noticed. Shrunken nuclei and degenerated mitochondria with disrupted cristae and penetration of the lipid droplets to form “myelin-like” structures were noticed by E/M examination. The study concluded that MSG had an unwholesome effect on the structure of the adrenal tissue of both pregnant rats and their pups","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83351279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NUTRITIONAL EFFECTS OF SOME POLLEN TYPES ON HYPOPHARYNGEAL AND ACID GLANDS IN HONEYBEE WORKERS (APIS MELLIFERA L.) 几种花粉对工蜂下咽腺和胃酸腺的营养作用

Journal of Modern Research in English Language Studies Pub Date : 2021-01-01 DOI: 10.21608/jmr.2021.70288.1062

H. Eshbah, A. Mohamed, O. Zedan, A. Ghanem

{"title":"NUTRITIONAL EFFECTS OF SOME POLLEN TYPES ON HYPOPHARYNGEAL AND ACID GLANDS IN HONEYBEE WORKERS (APIS MELLIFERA L.)","authors":"H. Eshbah, A. Mohamed, O. Zedan, A. Ghanem","doi":"10.21608/jmr.2021.70288.1062","DOIUrl":"https://doi.org/10.21608/jmr.2021.70288.1062","url":null,"abstract":"Pollen had a wide range of effects on honey bee. Caged honey bee workers were used to determine the nutritional effects of four main types of pollen collected by honey bee colonies from the study area on the food consumption rates, the development of the hypopharyngeal gland (HPG) acini and acid gland (AG) sacs in honey bee workers. Additionally, chemical analysis of the selected pollen types was performed. Pollen diets were as follows: broad bean pollen, date palm pollen, clover pollen, maize pollen and mixture of the for mentioned types beside the control pollen diet. The highest mean consumption was observed between 4th and 6th of day aged bees in all diets (23.05 mg./bee/3days). The highest quantity of food consumption was recorded in the 18th day when the workers were fed on date palm pollen (75.42 mg), while the lowest recorded 59.17 mg from maize pollen treatment. The highest mean acinal surface area of HPG was 0.0451mm2, which measured at 9 days-old of bees in all diets. While the workers fed on mixture pollen diet had the highest significant mean recorded the acinal surface area of HPG 0.0450mm2 comparing of 0.0223mm2 in control. The considering increment in average volume of acid gland sac with had been obtained at 18 days-old (0.7276mm3) that resembles the highest significant degree, the greatest mean volume of AG sacs was observed when bees were fed on broad bean pollen (0.6419mm3), while the lowest mean was 0.3643mm3 in control. Article information Received: 1 April 2021 Revised: 5 May 2021 Accepted: 11 May 2021","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73452130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Influence of Restoration Thickness and Auxillary Retentive Means on Fracture Resistance of Occlusal Ceramic Veneers 修复厚度及辅助固位方式对牙合陶瓷贴面抗折性的影响

Journal of Modern Research in English Language Studies Pub Date : 2021-01-01 DOI: 10.21608/jmr.2021.62981.1059

M. Aly, Cherief Mohsen

{"title":"Influence of Restoration Thickness and Auxillary Retentive Means on Fracture Resistance of Occlusal Ceramic Veneers","authors":"M. Aly, Cherief Mohsen","doi":"10.21608/jmr.2021.62981.1059","DOIUrl":"https://doi.org/10.21608/jmr.2021.62981.1059","url":null,"abstract":"Objectives:To evaluate the influence of restoration thickness and auxillary retentive means on fracture resistance of occlusal ceramic veneers. Materials and Methods: Forty sound molars were chosen which are free from caries, The teeth were divided into two classes and restored with CAD/CAM lithium disilicate ceramic occlusal veneers. Group (1) has no finish line, while Group (2) has a finish line. Each category consisted of 10 molars with buccal groove extension and 10 molars without it, with two thicknesses of 1 and 1.5 mm.Usage of a universal testing machine to measuring the fracture strength of lithium di silicate material after loading till fracture. Results: Only specimens in the group with the thickest thickness of (1.5 mm ) survived cyclic loading without any damage. Survival rates in the remaining sub-groups ranged from 50 to 100% for surviving with some damage and from 12.5 to 75% for surviving without any damage. Medians of final fracture resistance ranged from 772 to 902 N. In groups with larger ceramic thickness (1.5 mm) provided statistically significant (p ≤0.05) higher fracture resistance than smaller one. Significance: Usage of 1.5mm thickness buccally retentive lithium disilicate ceramic occlusal veneers can restore successfully severely abraded teeth. Article information Received: 13 February 2021 Revised: 21 April 2021 Accepted: 20 April 2021","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89903112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1