Nozhan Azimi, Nahal Azimi, Mohammad Mahdi Khanmohammadi, Rezvaneh Ghazanfari
Abstract Proper restoration and maintenance of endodontically treated teeth with thin-walled roots and immature apices is of a great concern due to the high prevalence of such cases. The aim of this study was to review the efficiency of different materials used for post–core systems in order to restore endodontically treated teeth. A literature review was conducted using electronic databases including PubMed, Scopus, Web of Science, and Google Scholar to find relevant articles. Randomized controlled trials that were related to different post–core techniques for restoring endodontically treated teeth and were in the English language were included from 2000 until 2022. Most articles concluded that cast posts have higher fracture resistance than fiber posts. All articles comparing stainless steel posts with other materials found that it had higher fracture strength. No particular difference between various types of fiber posts was identified, and all can reinforce the immature roots with thin dentinal walls.
摘要 经过牙髓治疗的牙齿具有薄壁牙根和不成熟的根尖，由于这类病例的高发率，对这类牙齿进行适当的修复和维护非常重要。本研究的目的是对用于修复牙髓治疗后牙齿的后牙髓系统的不同材料的效率进行回顾。我们使用电子数据库（包括 PubMed、Scopus、Web of Science 和 Google Scholar）进行了文献综述，以查找相关文章。从 2000 年到 2022 年，与修复牙髓治疗后牙齿的不同桩核技术相关的随机对照试验均被纳入其中，且均为英文。大多数文章得出结论认为，铸造桩比纤维桩具有更高的抗折断性。所有将不锈钢桩与其他材料进行比较的文章都发现，不锈钢桩的抗折强度更高。不同类型的纤维桩之间没有特别的区别，所有纤维桩都可以加固牙本质壁薄的未成熟牙根。
{"title":"Restorative Modalities for Structurally Compromised Teeth with Thin-walled Roots: A Literature Review","authors":"Nozhan Azimi, Nahal Azimi, Mohammad Mahdi Khanmohammadi, Rezvaneh Ghazanfari","doi":"10.1055/s-0043-1775967","DOIUrl":"https://doi.org/10.1055/s-0043-1775967","url":null,"abstract":"Abstract Proper restoration and maintenance of endodontically treated teeth with thin-walled roots and immature apices is of a great concern due to the high prevalence of such cases. The aim of this study was to review the efficiency of different materials used for post–core systems in order to restore endodontically treated teeth. A literature review was conducted using electronic databases including PubMed, Scopus, Web of Science, and Google Scholar to find relevant articles. Randomized controlled trials that were related to different post–core techniques for restoring endodontically treated teeth and were in the English language were included from 2000 until 2022. Most articles concluded that cast posts have higher fracture resistance than fiber posts. All articles comparing stainless steel posts with other materials found that it had higher fracture strength. No particular difference between various types of fiber posts was identified, and all can reinforce the immature roots with thin dentinal walls.","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"8 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139156419","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}
S. Ghasemi, S. Nadji, M. Dashti, M. Karimi-Galougahi, Negar Raygani, Mahla Nabi, Ghazal Mohammadi, Niyoosha Kandez, Amirali Ebrahimi, Elaheh Askari
Abstract Background Reverse transcription-polymerase chain reaction (RT-PCR) assays detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The number of viruses in the sample varies between patients; it depends on sample location, nasal or throat, and with time infection spreads. Previous studies showed that the viral load of coronavirus disease 2019 (COVID-19) infection is the peak just before symptoms onset. Furthermore, positive and negative results depend on test site, sampling, and timing method; RT-PCR can be 1 to 30% false-negative result. Methods and Materials Within this study, we took RT-PCR test from COVID-19 positive patients who already had the confirmation of the disease either by lung computed tomography (CT)-scan or the symptoms such as dyspnea. The study was explained to all the patients, and they confirmed to take the RT-PCR test. Negative samples from those patients were retested, and if the result came back negative, we included them as negative in the result. Result A total number of 49 patients (25 females) and (24 males) with a mean age of 53.24 years (ranging from 32 to 77) were enrolled. About 32.3% of patients, despite having COVID-19 disease, had a negative RT-PCR test. There is a positive and significant relationship between weight ( r = 0.253) and CT at the time of hospitalization of COVID-19 patients and a negative and significant relationship with O2 saturation without oxygen therapy ( r = − 0.296), the model can predict 67.7% of the disease due to the beta value, and the share of O2 saturation without oxygen therapy is more than weight. Conclusion We show that a pragmatic model can be designed to predict which patients have a higher chance of getting false-negative result, and should be retested for COVID-19. Among the variables, weight had a negative and significant relationship, and O2 saturation without respiratory support had a negative and significant relationship with COVID-19 disease.
{"title":"The Effect of Correlation of Laboratory-Developed Test and Initial Symptoms and False Negatives in RT-PCR Strategies for COVID-19 Patients with Beta Variants","authors":"S. Ghasemi, S. Nadji, M. Dashti, M. Karimi-Galougahi, Negar Raygani, Mahla Nabi, Ghazal Mohammadi, Niyoosha Kandez, Amirali Ebrahimi, Elaheh Askari","doi":"10.1055/s-0043-1768174","DOIUrl":"https://doi.org/10.1055/s-0043-1768174","url":null,"abstract":"Abstract Background Reverse transcription-polymerase chain reaction (RT-PCR) assays detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The number of viruses in the sample varies between patients; it depends on sample location, nasal or throat, and with time infection spreads. Previous studies showed that the viral load of coronavirus disease 2019 (COVID-19) infection is the peak just before symptoms onset. Furthermore, positive and negative results depend on test site, sampling, and timing method; RT-PCR can be 1 to 30% false-negative result. Methods and Materials Within this study, we took RT-PCR test from COVID-19 positive patients who already had the confirmation of the disease either by lung computed tomography (CT)-scan or the symptoms such as dyspnea. The study was explained to all the patients, and they confirmed to take the RT-PCR test. Negative samples from those patients were retested, and if the result came back negative, we included them as negative in the result. Result A total number of 49 patients (25 females) and (24 males) with a mean age of 53.24 years (ranging from 32 to 77) were enrolled. About 32.3% of patients, despite having COVID-19 disease, had a negative RT-PCR test. There is a positive and significant relationship between weight ( r = 0.253) and CT at the time of hospitalization of COVID-19 patients and a negative and significant relationship with O2 saturation without oxygen therapy ( r = − 0.296), the model can predict 67.7% of the disease due to the beta value, and the share of O2 saturation without oxygen therapy is more than weight. Conclusion We show that a pragmatic model can be designed to predict which patients have a higher chance of getting false-negative result, and should be retested for COVID-19. Among the variables, weight had a negative and significant relationship, and O2 saturation without respiratory support had a negative and significant relationship with COVID-19 disease.","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114127544","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}
One could ask: what’s the best toothpaste dentists recommend? Next question would be: based on what they recommend this or that product? No wonder whether a scientificbased answer would be provided by these clinicians! But their answers are certainlymostly based on heavymarketing usually done by the main companies. It does not mean that these companies are not investing in R&D and innovation! In fact, companies have really been investing in developing new oral care products. The size of the toothpaste market was valued at $18.5 billion in 2019, and is estimated to reach $24.5 billion by 2027, registering a Compound Annual Growth Rate (CAGR) of 3.7% until 2027 (https://www.alliedmarketresearch.com/). The great majority of toothpaste brands are conventional, with an increased market share for other types, such as herbal toothpastes and whitening ones. The oral care market has long been dominated by five big brands, which each produce a variety of toothpastes with different indications, flavors, ingredients, etc. Searching about the oral care market, we came across a company website (https://www.maccofinancial.com/blog/ investing-is-like-toothpaste) comparing the choice of a toothpaste with investment choices: “More choices are better,” one said! It was reported a visit to a grocery store to search for toothpaste. Instead of a handful of good choices, the author mentioned being “assaulted by 122 choices” (according to the author, choices were really counted). So, how do youmake the decision about the best optionwithout being overwhelmed? A good (and kind of obvious) starting point to think about a recommendation would be a toothpaste containing fluoride (F). Concerns have been expressed over the risks and benefits, both individually and collectively, of fluoride-containing therapeutic compounds. The access to F by the population has made possible the drastic reduction of caries all over the world, and toothpaste is the mean that allow the greatest delivery of F. With caries in decline, the world population started to have more teeth in their mouths, which meant other problems in oral health became evident. In this sense, the new habits of modern society have led to greater oral acidity levels inwhich the effectiveness of F is reduced. In this manner, there are several oral care products on the market with active ingredients to protect teeth against the enamel demineralization associated with fluoride, even in small concentrations.1 This may contribute to more clinical responses and patient acceptability of break-through products. Although traditional F technology still remains one of the key preventative strategies today, new formulations of innovative oral care products have been launched. Among them, it has been proposed that biomimetic approaches have a mechanism that reproduces the mineralization process, which can improve the enamel remineralization.2 This mechanism was possible by associating different ionic compounds in combination with F. Th
{"title":"Multipurpose Silicon-Based Toothpastes: Decision Making for a Better Oral Health","authors":"F. Vilhena, P. D’Alpino","doi":"10.1055/s-0042-1760337","DOIUrl":"https://doi.org/10.1055/s-0042-1760337","url":null,"abstract":"One could ask: what’s the best toothpaste dentists recommend? Next question would be: based on what they recommend this or that product? No wonder whether a scientificbased answer would be provided by these clinicians! But their answers are certainlymostly based on heavymarketing usually done by the main companies. It does not mean that these companies are not investing in R&D and innovation! In fact, companies have really been investing in developing new oral care products. The size of the toothpaste market was valued at $18.5 billion in 2019, and is estimated to reach $24.5 billion by 2027, registering a Compound Annual Growth Rate (CAGR) of 3.7% until 2027 (https://www.alliedmarketresearch.com/). The great majority of toothpaste brands are conventional, with an increased market share for other types, such as herbal toothpastes and whitening ones. The oral care market has long been dominated by five big brands, which each produce a variety of toothpastes with different indications, flavors, ingredients, etc. Searching about the oral care market, we came across a company website (https://www.maccofinancial.com/blog/ investing-is-like-toothpaste) comparing the choice of a toothpaste with investment choices: “More choices are better,” one said! It was reported a visit to a grocery store to search for toothpaste. Instead of a handful of good choices, the author mentioned being “assaulted by 122 choices” (according to the author, choices were really counted). So, how do youmake the decision about the best optionwithout being overwhelmed? A good (and kind of obvious) starting point to think about a recommendation would be a toothpaste containing fluoride (F). Concerns have been expressed over the risks and benefits, both individually and collectively, of fluoride-containing therapeutic compounds. The access to F by the population has made possible the drastic reduction of caries all over the world, and toothpaste is the mean that allow the greatest delivery of F. With caries in decline, the world population started to have more teeth in their mouths, which meant other problems in oral health became evident. In this sense, the new habits of modern society have led to greater oral acidity levels inwhich the effectiveness of F is reduced. In this manner, there are several oral care products on the market with active ingredients to protect teeth against the enamel demineralization associated with fluoride, even in small concentrations.1 This may contribute to more clinical responses and patient acceptability of break-through products. Although traditional F technology still remains one of the key preventative strategies today, new formulations of innovative oral care products have been launched. Among them, it has been proposed that biomimetic approaches have a mechanism that reproduces the mineralization process, which can improve the enamel remineralization.2 This mechanism was possible by associating different ionic compounds in combination with F. Th","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121848705","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}
1Essen, Germany 2Department of Hematology, Internal Oncology & Stem Cell Transplant, Evangelical Hospital Essen-Werden, Essen, Germany 3Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Oral and Maxillofacial Surgery, Medical Center, University of Freiburg, Freiburg im Breisgau, Germany 4Division of Endodontics, Department of Dentistry, Faculty of Medicine and Dentistry, Danube Private University, Krems, Austria
{"title":"The Oral Manifestations of SARS-CoV-2, Mucormycosis, and Leukemia in the Current Pandemic","authors":"K. Nasiri, A. Dimitrova, K. Wrbas","doi":"10.1055/s-0042-1747919","DOIUrl":"https://doi.org/10.1055/s-0042-1747919","url":null,"abstract":"1Essen, Germany 2Department of Hematology, Internal Oncology & Stem Cell Transplant, Evangelical Hospital Essen-Werden, Essen, Germany 3Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Oral and Maxillofacial Surgery, Medical Center, University of Freiburg, Freiburg im Breisgau, Germany 4Division of Endodontics, Department of Dentistry, Faculty of Medicine and Dentistry, Danube Private University, Krems, Austria","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114542429","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}
Objective Aggressive periodontitis (AgP) is a type of periodontal disease that is relatively prevalent among Sudanese population. The disease generally affects younger individuals and might lead to tooth loss if undetected early, leading to costly and long periodontal treatment. Until today, no reliable detection tool is present, so diagnosis is confirmed only after periodontal tissue loss has already occurred. Interleukin-12 (IL-2) has both proinflammatory and immune-regulatory effects and it has been implicated in the pathogenesis of other inflammatory diseases such as rheumatoid arthritis. However, it was not studied extensively in Sudanese population. Therefore, the aim of this study was to measure and compare the level of IL-12 in the gingival crevicular fluid (GCF) of patients with AgP and healthy subjects without periodontitis. Materials and Methods In this study, 30 patients with AgP and 30 healthy subjects were recruited. The periodontal parameters included bleeding on probing (BOP), periodontal pocket depth (PPD), and clinical attachment level (CAL). GCF levels of IL-12 were measured. Results A total of 60 participants were enrolled in this study with female predominance of 83% and males comprising 17%. The results of this study showed slight elevation in the level of IL-12 in the GCF in AgP group with a mean value of (60.7) and a mean value of (52.7) in the healthy subjects group; however, the difference was not statistically significant (p-value = 0.120). Also, no statistically significant correlation was found between the level of this interleukin and periodontal parameters with slight elevation in AgP group. The p-value for BOP, PPD, and CAL was 0.369, 0.985, and 0.797, respectively. Conclusion The slight increase in the level of IL-12 in GCF of AgP patient and slight elevation in sites with attachment loss suggest a possible role of this cytokine in the pathogenesis of AgP. More studies are required to determine the exact role of this cytokine in AgP.
{"title":"Assessment of the Level of Interleukin-12 in Gingival Crevicular Fluid of a Group of Patients with Aggressive Periodontitis and a Group of Healthy Subjects","authors":"Marwa Mohamed Sidahmed, N. Hashim","doi":"10.1055/s-0042-1748169","DOIUrl":"https://doi.org/10.1055/s-0042-1748169","url":null,"abstract":"\u0000 Objective Aggressive periodontitis (AgP) is a type of periodontal disease that is relatively prevalent among Sudanese population. The disease generally affects younger individuals and might lead to tooth loss if undetected early, leading to costly and long periodontal treatment. Until today, no reliable detection tool is present, so diagnosis is confirmed only after periodontal tissue loss has already occurred. Interleukin-12 (IL-2) has both proinflammatory and immune-regulatory effects and it has been implicated in the pathogenesis of other inflammatory diseases such as rheumatoid arthritis. However, it was not studied extensively in Sudanese population. Therefore, the aim of this study was to measure and compare the level of IL-12 in the gingival crevicular fluid (GCF) of patients with AgP and healthy subjects without periodontitis.\u0000 Materials and Methods In this study, 30 patients with AgP and 30 healthy subjects were recruited. The periodontal parameters included bleeding on probing (BOP), periodontal pocket depth (PPD), and clinical attachment level (CAL). GCF levels of IL-12 were measured.\u0000 Results A total of 60 participants were enrolled in this study with female predominance of 83% and males comprising 17%. The results of this study showed slight elevation in the level of IL-12 in the GCF in AgP group with a mean value of (60.7) and a mean value of (52.7) in the healthy subjects group; however, the difference was not statistically significant (p-value = 0.120). Also, no statistically significant correlation was found between the level of this interleukin and periodontal parameters with slight elevation in AgP group. The p-value for BOP, PPD, and CAL was 0.369, 0.985, and 0.797, respectively.\u0000 Conclusion The slight increase in the level of IL-12 in GCF of AgP patient and slight elevation in sites with attachment loss suggest a possible role of this cytokine in the pathogenesis of AgP. More studies are required to determine the exact role of this cytokine in AgP.","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115797588","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}
In the past few years, it has been seen that digital technology captured all field of life and health sciences. These advances revolutionized the field of dentistry and oral health education as well. Advancements have been observed mainly in education as e-learning platforms has been massively subscribed, then digital gadgets, telecommunication technology, digital diagnostic imaging services, artificial intelligence, and other softwares for disease analysis and dental follow-up.1 These modifications and innovations related to technology have improved the quality of patient care providing health care centers and qualified dentists the chance to practice effectively at long distances.2,3 This concept of hobnobbing, communicating, and providing distant consultations, workup, and analysis digitally is the part of the science of telemedicine concerned with dentistry known as “Teledentistry (TD).”4 According to the literature, the concept of TD was drafted in 1989 as a component of the blueprint for dental informatics and patient data mining. It was introduced at a conference in Baltimore; the focus of the discussion was applying dental informatics in dental practice to help deliver quality oral health care.3 The significance of TD is stress-free examination, for example, child patient sitting with their parents and the dental care practitioner providing a cooperative consultancy with the child. Also, it is convenient for the patient as well to stay at home and reduce the multiple visits from far distance. Prof. Cook first used the termTD in 1997,who defined it as an amalgamation of information technology and dentalrelated consultancy involving the exchange of clinical data of patient over remote distances for appropriate treatment planning.4 Introduction by these events toTDhasgiven a new and feasible way to dental practice and improved patient care. Modern technology has created opportunities in the field of dentistry and improved TD to get complete, deep analysis, and precise patient information to give satisfactory results and redesign businesses.2,5 This was evident in almost all the fields of dentistry utilizing TD as a mode of consultation and delivering minor dental services, such as in oral surgery it was proved to be a way of providing preoperative evaluation wherever mobility was restricted and improved referral system. Furthermore, it is also reported in Ireland that TD has worked in oral medicine and diagnosis where TD consultation system was implemented and reported effective in diagnosing oral lesions. Moreover, in orthodontics it was useful for interceptive orthodontic treatments, in prosthodontics, pedodontics, operatives, endodontics, and other fields of dentistry. TD was fruitful for video communication (consultation and examination) providing initial care and postoperative care to patients.4 Adding to that it has improved patient care as reported in one of the studies done by the “Group of Chin-Shan in their Health Center and Nation
{"title":"Teledentistry in Oral Health Care","authors":"Shaur Sarfaraz, Z. Khurshid","doi":"10.1055/s-0042-1743255","DOIUrl":"https://doi.org/10.1055/s-0042-1743255","url":null,"abstract":"In the past few years, it has been seen that digital technology captured all field of life and health sciences. These advances revolutionized the field of dentistry and oral health education as well. Advancements have been observed mainly in education as e-learning platforms has been massively subscribed, then digital gadgets, telecommunication technology, digital diagnostic imaging services, artificial intelligence, and other softwares for disease analysis and dental follow-up.1 These modifications and innovations related to technology have improved the quality of patient care providing health care centers and qualified dentists the chance to practice effectively at long distances.2,3 This concept of hobnobbing, communicating, and providing distant consultations, workup, and analysis digitally is the part of the science of telemedicine concerned with dentistry known as “Teledentistry (TD).”4 According to the literature, the concept of TD was drafted in 1989 as a component of the blueprint for dental informatics and patient data mining. It was introduced at a conference in Baltimore; the focus of the discussion was applying dental informatics in dental practice to help deliver quality oral health care.3 The significance of TD is stress-free examination, for example, child patient sitting with their parents and the dental care practitioner providing a cooperative consultancy with the child. Also, it is convenient for the patient as well to stay at home and reduce the multiple visits from far distance. Prof. Cook first used the termTD in 1997,who defined it as an amalgamation of information technology and dentalrelated consultancy involving the exchange of clinical data of patient over remote distances for appropriate treatment planning.4 Introduction by these events toTDhasgiven a new and feasible way to dental practice and improved patient care. Modern technology has created opportunities in the field of dentistry and improved TD to get complete, deep analysis, and precise patient information to give satisfactory results and redesign businesses.2,5 This was evident in almost all the fields of dentistry utilizing TD as a mode of consultation and delivering minor dental services, such as in oral surgery it was proved to be a way of providing preoperative evaluation wherever mobility was restricted and improved referral system. Furthermore, it is also reported in Ireland that TD has worked in oral medicine and diagnosis where TD consultation system was implemented and reported effective in diagnosing oral lesions. Moreover, in orthodontics it was useful for interceptive orthodontic treatments, in prosthodontics, pedodontics, operatives, endodontics, and other fields of dentistry. TD was fruitful for video communication (consultation and examination) providing initial care and postoperative care to patients.4 Adding to that it has improved patient care as reported in one of the studies done by the “Group of Chin-Shan in their Health Center and Nation","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131612409","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}
acute respiratory syndrome coronavirus type 1 – This letter on the concept of the gag re fl ex control during dental treatment
急性呼吸综合征冠状病毒1型-这封信是关于在牙科治疗期间控制呕吐的概念
{"title":"Prevention of Hyperactive Gag Reflex during Dental Procedures in COVID-19 Pandemic","authors":"K. Nasiri, A. Dimitrova","doi":"10.1055/s-0041-1741526","DOIUrl":"https://doi.org/10.1055/s-0041-1741526","url":null,"abstract":"acute respiratory syndrome coronavirus type 1 – This letter on the concept of the gag re fl ex control during dental treatment","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129949298","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}
A. Al-Quraini, Abdulrahman Fahad Al-Aodah, Adam Ahmed M. Al-Qadhi, Abdul Majeed Munir Ahmad
Abstract Objective This study aims to assess and compare the influence of hydroxyapatite (HA) and tricalcium phosphate (TCP) nanoparticles on a commercially available epoxy resinbased sealer, focusing on porosity and push-out bond strength. Materials and Methods This work was classified into a control group and two experimental groups. In each experimental group, the sealer was mixed with 2.5 wt.% of HA and TCP nanoparticles. Thirty extracted single-rooted teeth were utilized. After sectioning the crowns, the remaining roots of 15 teeth were used, up to 40 to 0.06, using a K3 rotary system. Smear layers were removed with 3 mL of 17% EDTA applied for 60 seconds. Then, the canals were irrigated with 3 mL of 2.25% NaOCl and 5 mL of distilled water. The strength of push-out bonds was tested via an Instron universal testing machine on a 2 mm section acquired from obturated canals. Data were assessed using one-way ANOVA and post hoc tests at a significance level of p < 0.05. Results A nonsignificant difference (p > 0.05) was evident when the three groups were crosschecked in terms of void volume and bond strength. Micro-CT evaluations revealed the lowest volume of voids to be 0.1152 mm3 (2.69%) for the HA group compared with the control group 0.1818 mm3 (3.9%) and the TCP group 0.2194 mm3 (4.33%). Mean bond strength values were 4.18 ± 1.77 MPa for group 1 (control), 4.19 ± 1.54 MPa for group 2 (HA 2.5%) and 3.76 ± 1.95 MPa for group 3 (TCP 2.5%). Groups 1 and 3 showed both cohesive and a mixed type of failure, while group 2 showed adhesive and a mixed type of bond failure. Conclusion Within the limitations of the study, incorporation of 2.5 wt% HA and TCP nanoparticles into AH Plus did not significantly affect the percentage volume of voids and the bond strength negatively.
{"title":"Incorporation of Hydroxyapatite (HA) and Calcium Triphosphate (TCP) in the Epoxy Resin-Based Sealer","authors":"A. Al-Quraini, Abdulrahman Fahad Al-Aodah, Adam Ahmed M. Al-Qadhi, Abdul Majeed Munir Ahmad","doi":"10.1055/s-0041-1739398","DOIUrl":"https://doi.org/10.1055/s-0041-1739398","url":null,"abstract":"Abstract Objective This study aims to assess and compare the influence of hydroxyapatite (HA) and tricalcium phosphate (TCP) nanoparticles on a commercially available epoxy resinbased sealer, focusing on porosity and push-out bond strength. Materials and Methods This work was classified into a control group and two experimental groups. In each experimental group, the sealer was mixed with 2.5 wt.% of HA and TCP nanoparticles. Thirty extracted single-rooted teeth were utilized. After sectioning the crowns, the remaining roots of 15 teeth were used, up to 40 to 0.06, using a K3 rotary system. Smear layers were removed with 3 mL of 17% EDTA applied for 60 seconds. Then, the canals were irrigated with 3 mL of 2.25% NaOCl and 5 mL of distilled water. The strength of push-out bonds was tested via an Instron universal testing machine on a 2 mm section acquired from obturated canals. Data were assessed using one-way ANOVA and post hoc tests at a significance level of p < 0.05. Results A nonsignificant difference (p > 0.05) was evident when the three groups were crosschecked in terms of void volume and bond strength. Micro-CT evaluations revealed the lowest volume of voids to be 0.1152 mm3 (2.69%) for the HA group compared with the control group 0.1818 mm3 (3.9%) and the TCP group 0.2194 mm3 (4.33%). Mean bond strength values were 4.18 ± 1.77 MPa for group 1 (control), 4.19 ± 1.54 MPa for group 2 (HA 2.5%) and 3.76 ± 1.95 MPa for group 3 (TCP 2.5%). Groups 1 and 3 showed both cohesive and a mixed type of failure, while group 2 showed adhesive and a mixed type of bond failure. Conclusion Within the limitations of the study, incorporation of 2.5 wt% HA and TCP nanoparticles into AH Plus did not significantly affect the percentage volume of voids and the bond strength negatively.","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129954559","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}
Noha Abdullah Bin Jabr, Wacim Nassouh Al-Saidi, Ibtessam Abdullah Bin Jabr, Roula Al-Bounni
Abstract Objective The effect of polymerization time and resin shade on the depth of cure (DOC) of two nano-hybrid resin composites (Filtek Z250 XT and IPS Empress Direct) was evaluated and compared. Materials and Methods Sixty specimens were prepared from two shades (A1 and A3) of the resin composites. The specimens were allocated into two groups that were further divided into three subgroups depending on the polymerization time (20, 40, and 60 sec; n = 5). After that, the DOC was evaluated by calculating the polymerized part of the specimen’s thickness to the nearest (0.01 mm) using a high-accuracy micrometer. Each specimen was measured three times, and the corresponding mean reading (in mm) was divided by two to obtain the DOC. The data were analyzed using SPSS software, version 20. Descriptive statistics followed by three-way analysis of variance was applied. Multiple comparisons were made using Scheffe post hoc tests (α = 0.05). Results Filtek Z250 XT-A1-60sec presented with the greatest DOC (7.42 ± 0.47 mm), and the lowest DOC was obtained with IPS Empress-A3-20sec (2.31 ± 0.21 mm). The mean DOC of Filtek Z250 XT and IPS Empress Direct resin composites were 6.18 mm and 3.59 mm, respectively. Statistically significant (p < 0.05) difference was observed between the resin composites. The interaction between independent factors, namely composites, resin shade, and polymerization time, revealed that interaction between them contributed significantly to the DOC (p ≤0.05). However, the interaction between resin shade and the polymerization time was insignificant (p = 0.148). Conclusion Filtek Z250 XT demonstrated greater DOC than IPS Empress Direct resin composite. An increase in polymerization time significantly enhanced the DOC of the resin composites irrespective of the resin shade. Regardless of the resin composite tested, DOC was lower for darker shades (A3).
{"title":"Effect of Polymerization Time and Shade on the Depth of Cure of Nano-Hybrid Resin Composites","authors":"Noha Abdullah Bin Jabr, Wacim Nassouh Al-Saidi, Ibtessam Abdullah Bin Jabr, Roula Al-Bounni","doi":"10.1055/s-0041-1726169","DOIUrl":"https://doi.org/10.1055/s-0041-1726169","url":null,"abstract":"Abstract Objective The effect of polymerization time and resin shade on the depth of cure (DOC) of two nano-hybrid resin composites (Filtek Z250 XT and IPS Empress Direct) was evaluated and compared. Materials and Methods Sixty specimens were prepared from two shades (A1 and A3) of the resin composites. The specimens were allocated into two groups that were further divided into three subgroups depending on the polymerization time (20, 40, and 60 sec; n = 5). After that, the DOC was evaluated by calculating the polymerized part of the specimen’s thickness to the nearest (0.01 mm) using a high-accuracy micrometer. Each specimen was measured three times, and the corresponding mean reading (in mm) was divided by two to obtain the DOC. The data were analyzed using SPSS software, version 20. Descriptive statistics followed by three-way analysis of variance was applied. Multiple comparisons were made using Scheffe post hoc tests (α = 0.05). Results Filtek Z250 XT-A1-60sec presented with the greatest DOC (7.42 ± 0.47 mm), and the lowest DOC was obtained with IPS Empress-A3-20sec (2.31 ± 0.21 mm). The mean DOC of Filtek Z250 XT and IPS Empress Direct resin composites were 6.18 mm and 3.59 mm, respectively. Statistically significant (p < 0.05) difference was observed between the resin composites. The interaction between independent factors, namely composites, resin shade, and polymerization time, revealed that interaction between them contributed significantly to the DOC (p ≤0.05). However, the interaction between resin shade and the polymerization time was insignificant (p = 0.148). Conclusion Filtek Z250 XT demonstrated greater DOC than IPS Empress Direct resin composite. An increase in polymerization time significantly enhanced the DOC of the resin composites irrespective of the resin shade. Regardless of the resin composite tested, DOC was lower for darker shades (A3).","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117340972","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}
Abstract Objectives Two of lives’ most important domains may be in conflict with each other. This study investigated the association between perceived work-life balance (WLB), work interference with family (WIF), family interference with work (FIW), and organizational commitment (OC) of Nigerian orthodontists and orthodontic residents. Materials and Methods Consultant orthodontists (n = 37) as well as orthodontics residents (n = 33) responded to an electronic questionnaire. Statistical Analysis Multivariate analysis of variance assessed significant differences among demographic and career features on WLB, WIF, and FIW. Spearman’s correlation coefficient and then multiple regression analysis examined relationships among perception of WLB, WIF, FIW, and OC. Results Perceived WLB and WIF had statistically significant negative correlation with OC among Nigerian orthodontic practitioners. However, the study finds a positive, but not statistically significant correlation of perception of FIW and OC. Conclusion Perceived WLB and WIF are significant contributors to levels of OC among Nigerian orthodontists and orthodontic residents. Multiple regression analysis identified a model that includes perceived WLB, WIF, and FIW that accounts for 16.7% of the variation in OC.
{"title":"Do Orthodontists and Orthodontic Residents Perceive that Work-Life Balance and Work-Family Conflicts Affect Their Organizational Commitment?","authors":"T. Yemitan, T. Adeyemi","doi":"10.1055/s-0041-1727089","DOIUrl":"https://doi.org/10.1055/s-0041-1727089","url":null,"abstract":"Abstract Objectives Two of lives’ most important domains may be in conflict with each other. This study investigated the association between perceived work-life balance (WLB), work interference with family (WIF), family interference with work (FIW), and organizational commitment (OC) of Nigerian orthodontists and orthodontic residents. Materials and Methods Consultant orthodontists (n = 37) as well as orthodontics residents (n = 33) responded to an electronic questionnaire. Statistical Analysis Multivariate analysis of variance assessed significant differences among demographic and career features on WLB, WIF, and FIW. Spearman’s correlation coefficient and then multiple regression analysis examined relationships among perception of WLB, WIF, FIW, and OC. Results Perceived WLB and WIF had statistically significant negative correlation with OC among Nigerian orthodontic practitioners. However, the study finds a positive, but not statistically significant correlation of perception of FIW and OC. Conclusion Perceived WLB and WIF are significant contributors to levels of OC among Nigerian orthodontists and orthodontic residents. Multiple regression analysis identified a model that includes perceived WLB, WIF, and FIW that accounts for 16.7% of the variation in OC.","PeriodicalId":130020,"journal":{"name":"European Dental Research and Biomaterials Journal","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122621603","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}
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