Dentistry and Medical Research最新文献_第6页

Effect of sliding wear mechanism condition on the wear behavior of dental biocomposite materials 滑动磨损机制条件对口腔生物复合材料磨损行为的影响

Dentistry and Medical Research Pub Date : 2020-01-01 DOI: 10.4103/dmr.dmr_2_20

E. Yilmaz

{"title":"Effect of sliding wear mechanism condition on the wear behavior of dental biocomposite materials","authors":"E. Yilmaz","doi":"10.4103/dmr.dmr_2_20","DOIUrl":"https://doi.org/10.4103/dmr.dmr_2_20","url":null,"abstract":"Background: The purpose was to study the effect of sliding condition on the wear behavior of nanofilled composite material under two-body wear test mechanism. Materials and Methods: In this study, a supreme composite material with nanofiller was subjected to abrasion test procedures' in vitro conditions. In this study, the test samples were divided into two groups and subjected 50 N wear force, 1.6 Hz wear frequency, 240,000 wear cycles, constantly 37°C temperature, and 0.3 mm and 0.6 mm sliding conditions through wear test procedures, respectively. The volume loss in the wear area of the test samples after the wear test procedures was analyzed using a noncontact three-dimensional profilometer. In addition, microstructure analysis was performed by selecting random test samples from each group using scanning electron microscopy. Results: As per the data obtained during this study, with an increase in the amount of lateral movement, the volume loss in the composite material had also increased after wear test procedures. Conclusion: However, the increase in volume loss in the wear area of the composite material did not show a linear relationship with the amount of lateral movement.","PeriodicalId":413497,"journal":{"name":"Dentistry and Medical Research","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115320320","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

Corona virus disease 2019 pandemic: Necessity for active engagement of the private sector 2019年冠状病毒病大流行:私营部门积极参与的必要性

Dentistry and Medical Research Pub Date : 2020-01-01 DOI: 10.4103/dmr.dmr_6_20

S. Shrivastava, P. Shrivastava

引用次数: 1

Dentist's role in maxillofacial prosthetic rehabilitation: Outlook of undergraduate dental students of aimst university: A questionnaire-based study 牙医在颌面修复康复中的作用:aimst大学牙科本科学生的展望:一项基于问卷的研究

Dentistry and Medical Research Pub Date : 2020-01-01 DOI: 10.4103/dmr.dmr_27_19

Ajay Jain, S. Ugrappa, Jong Hui, Khaw Kai, Min Koay

{"title":"Dentist's role in maxillofacial prosthetic rehabilitation: Outlook of undergraduate dental students of aimst university: A questionnaire-based study","authors":"Ajay Jain, S. Ugrappa, Jong Hui, Khaw Kai, Min Koay","doi":"10.4103/dmr.dmr_27_19","DOIUrl":"https://doi.org/10.4103/dmr.dmr_27_19","url":null,"abstract":"Statement of Problem: Anecdotal evidence suggests that there is a lack of literature regarding the awareness of maxillofacial prostheses among dental students. Purpose: This study identifies the level of cognition of undergraduate dental students in various aspects of maxillofacial prosthetic rehabilitation using a questionnaire. Materials and Methods: A total of 180 undergraduate dental students were involved in the study for the analysis of a series of structured questionnaires, related to awareness of dentist's role in maxillofacial prosthetic rehabilitation. Results: The results of the study showed that 90% of the cohort were aware of a maxillofacial prosthesis. About 78% of the cohort had heard of various types of maxillofacial prosthesis. Only 18.3% and 28.9% of the cohort had knowledge that silicone elastomer and acrylic is used in the fabrication of such prosthesis, respectively, but 41.7% were not sure about it. About 80% and 86.1% of the cohort think that maxillofacial prosthetic rehabilitation is an alternative treatment option for plastic reconstructive surgery and maxillofacial prosthetists should be the team member of anaplastology team, respectively. Conclusions: The majority of the students were aware of maxillofacial prosthetic rehabilitation to a certain degree. This survey underlines the need for providing adequate awareness initiatives for dental students to further enhance their knowledge and exposure regarding this field of expertise.","PeriodicalId":413497,"journal":{"name":"Dentistry and Medical Research","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116241031","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

Public health significance of head and neck cancer – A narrative review 头颈癌的公共卫生意义——综述

Dentistry and Medical Research Pub Date : 2020-01-01 DOI: 10.4103/dmr.dmr_4_20

F. Ahmed, S. Marshoudi, Syed Peeran

引用次数: 1

Minimally Invasive Transalveolar Sinus Augmentation: An Answer to Sinus Conundrum 微创经肺泡窦增强术:解决窦性难题

Dentistry and Medical Research Pub Date : 2020-01-01 DOI: 10.4103/dmr.dmr_3_20

Jaibin George, S. Gopal, Febel Huda, N. Thomas

引用次数: 1

Assessment of common errors and subjective quality of digital panoramic radiographs in a dental institution 牙科机构数字全景x光片常见误差及主观质量评估

Dentistry and Medical Research Pub Date : 2020-01-01 DOI: 10.4103/dmr.dmr_22_19

Nithin Kumar

{"title":"Assessment of common errors and subjective quality of digital panoramic radiographs in a dental institution","authors":"Nithin Kumar","doi":"10.4103/dmr.dmr_22_19","DOIUrl":"https://doi.org/10.4103/dmr.dmr_22_19","url":null,"abstract":"Aim: The aim of the study was to determine the incidence of patient preparation and positioning errors during panoramic radiographic imaging and to assess the subjective quality of panoramic radiographs in a sample of records collected from a dental institution. Materials and Methods: The study material was 1000 randomly selected panoramic radiographs obtained from the database of the department of oral and maxillofacial radiology. Patient preparation and positioning errors of the radiographs were evaluated and categorized into nine groups. The sample radiographs were also evaluated for subjective quality according to a three-point quality scale by the National Radiological Protection Board (United Kingdom) as “excellent,” “diagnostically acceptable,” or “unacceptable.” Results: Out of 1000 radiographs evaluated, failure to position the tongue against palate was the most common error at 69.5% and patient movement during radiographic exposure was the least common error at 0.4%. As per the subjective quality ratings, 22.4% of the radiograph had excellent quality, 66.4% were diagnostically acceptable, and 13.2% were unacceptable. Conclusion: The incidence of patient positioning errors in the panoramic radiographs was relatively common. The quality of the diagnostic panoramic radiographs could be improved by better operator education and awareness in relation to patient preparation and positioning.","PeriodicalId":413497,"journal":{"name":"Dentistry and Medical Research","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122102196","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

Coronavirus disease-2019: A brief overview 2019冠状病毒病:简要概述

Dentistry and Medical Research Pub Date : 2020-01-01 DOI: 10.4103/dmr.dmr_11_20

Syed Basheer, Syed Peeran

引用次数: 1

Ensuring the supply of essential commodities in the containment of the COVID-19 pandemic: World health organization 确保遏制COVID-19大流行过程中基本商品的供应:世界卫生组织

Dentistry and Medical Research Pub Date : 2020-01-01 DOI: 10.4103/dmr.dmr_9_20

S. Shrivastava, P. Shrivastava

引用次数: 0

Molar incisor hypomineralization in North Malabar: An epidemiological study 北马拉巴尔磨牙切牙低矿化:流行病学研究

Dentistry and Medical Research Pub Date : 2019-07-01 DOI: 10.4103/dmr.dmr_10_19

F. Peedikayil, Nitya C. Tomy, T. Chandru, Mahmood Muthedath, Jerin Jose

{"title":"Molar incisor hypomineralization in North Malabar: An epidemiological study","authors":"F. Peedikayil, Nitya C. Tomy, T. Chandru, Mahmood Muthedath, Jerin Jose","doi":"10.4103/dmr.dmr_10_19","DOIUrl":"https://doi.org/10.4103/dmr.dmr_10_19","url":null,"abstract":"Background and Objectives: Molar incisor hypomineralization (MIH) is an acquired developmental defect of unknown etiology. The acquired factors include perinatal events, exposure to fluoride, infantile exposure to biphenols and dioxins, childhood illness, specific chronic disease. A study was conducted in two districts, namely Kannur and Kasaragod district of Kerala to know the prevalence of molar incisal hypomineralization. Materials and Methods: A cross-sectional epidemiological study was conducted on a random sample of 2000 normal – healthy school children aged between 6 and 10 years of Kannur and Kasaragod district of Kerala. A full mouth inspection of wet teeth was performed for all the examined children using the 10-point scoring system which is in accordance with the European Academy of Paediatric Dentistry evaluation criteria. Data were collected, recorded, tabulated, and evaluated using the Statistical Package for the Social Sciences 17.0 for Windows. Percentage arithmetic mean value, standard deviation, independent sample t-test, Chi-square test, and Pearson correlations were used while a P< 0.05 was considered statistically significant. Results: The study result showed the prevalence of MIH as 19.8% in children of age group 6–10 years in northern Kerala. The prevalence in Kannur and Kasaragod districts were 16% and 23.6%, respectively. Interpretation and Conclusion: Prevalence of Molar Incisor Hypominerilization is more in Kasaragod district. Therefore, more studies should be done to confirm the effect of environmental factors in those areas.","PeriodicalId":413497,"journal":{"name":"Dentistry and Medical Research","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124787066","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

Epidermal growth factor receptor as an early diagnostic marker of oral squamous cell carcinoma: Marking the line between severe dysplasia and oral squamous cell carcinoma 表皮生长因子受体作为口腔鳞状细胞癌的早期诊断标志物:标志着严重发育不良和口腔鳞状细胞癌的界限

Dentistry and Medical Research Pub Date : 2019-07-01 DOI: 10.4103/dmr.dmr_38_18

Sankeerti Mala

{"title":"Epidermal growth factor receptor as an early diagnostic marker of oral squamous cell carcinoma: Marking the line between severe dysplasia and oral squamous cell carcinoma","authors":"Sankeerti Mala","doi":"10.4103/dmr.dmr_38_18","DOIUrl":"https://doi.org/10.4103/dmr.dmr_38_18","url":null,"abstract":"Context: Epidermal growth factor receptor (EGFR) and its ligands are involved in the cell growth of 70% cancer cells. EGFR overexpression or dysregulation may alter intracellular signaling pathways that affect tumor cell survival and apoptosis. It is hypothesized that only those potentially malignant lesions express high levels of EGFR progress to frank malignancies during tumorigenesis which suggests that increase in receptors might be the cause of malignancy rather than the effect of malignancy. Aims: The aim of the study was to assess and correlate the expression of EGFR in varying grades of oral epithelial dysplasia, oral squamous cell carcinoma (OSCC), and normal oral mucosa and to evaluate the early rate of malignant transformation in potentially malignant lesions. Settings and Design: It was a immunohistochemical study. Subjects and Methods: Twenty formalin-fixed, paraffin-embedded blocks of various grades of oral epithelial dysplasia, 10 formalin-fixed, paraffin-embedded blocks of OSCC, and 10 normal mucosae are stained with routine hematoxylin and eosin and immunostained with EGFR by avidin–biotin method. Statistical Analysis Used: Statistical analysis was performed by one-way ANOVA and multiple comparison tests using IBM SPSS Software 20.0 20. Results: Of 40 cases analyszd, 38 cases showed EGFR expression with varied extent and intensity of staining in the cytoplasm and cell membrane of keratinocytes in basal, parabasal, deep spinous, and superficial spinous layer. The results showed a statistically significant increase (P < 0.0001) in the staining extent and intensity of EGFR expression in severe dysplasia and OSCC. Conclusions: EGFRs may act as a marker since they reflect the early changes in dysplastic lesions – predicting the rate of malignant transformation in potentially malignant disorders and thereby aiding the oral pathologist in arresting the lesion before it enters malignancy.","PeriodicalId":413497,"journal":{"name":"Dentistry and Medical Research","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116190716","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