This manuscript features the promising findings of a study conducted by Ju et al,who used graphene nanocomposites for air disinfection in dental clinics.Their study demonstrated that,compared with conventional filters...This manuscript features the promising findings of a study conducted by Ju et al,who used graphene nanocomposites for air disinfection in dental clinics.Their study demonstrated that,compared with conventional filters,graphene nanocom-posites substantially improved air quality and reduced microbial contamination.This manuscript highlights the innovative application of graphene materials,emphasizing their potential to enhance dental clinic environments by minimizing secondary pollution.On the basis of the unique antimicrobial properties of gra-phene and the original study’s rigorous methodology,we recommend using gra-phene nanocomposites in clinical settings to control airborne infections.展开更多
Objective To investigate the feature and frequency of medical emergencies in dental clinics in China and the Methods A survey study was conducted among 2408 dentists who attended continuing educational courses held by...Objective To investigate the feature and frequency of medical emergencies in dental clinics in China and the Methods A survey study was conducted among 2408 dentists who attended continuing educational courses held by Society of Sedation and Analgesia of Chinese Stomatological Association in 18 cities from December 2015 to December 2018.Demographic information of the dentists and the characteristics of medical emergencies they encountered were collected and analyzed.The associated demographic features for dentist experiencing medical emergencies were analyzed by logistic regression model.Results A total of 2013 dentists provided valid responses and reported 2923 events of medical emergencies in dental clinics.Among them,85.0%reported that they had encountered medical emergencies,and 35.5%had encountered at least twice.Syncope(35.9%)and hypoglycemia(30.3%)were the most common reported medical emergencies.Medical emergencies were most likely to occur during local anesthesia(49.9%),out-patient oral surgery(25.9%),and root canal treatment(11.3%).There were 6 patients(0.2%)died in emergencies.84.0%dentists reported that they had never received training courses about medical emergency management in dentistry other than Basic Life Support.Longer practicing time(10-15 years)(OR=0.59,95%CI:0.41-0.85,P=0.004),working in private dental facilities(OR=1.69,95%CI:1.20-2.38,P=0.003)were associated with an increased risk of experiencing medical emergencies.Conclusion More efforts are needed in prevention,early identification,and timely management of medical emergencies in dental clinics in order to prevent fatal outcomes.The results of this survey are useful information for re-designing emergency training courses for Chinese dentists.展开更多
AIM: To study a service model that enables a clinic to be open to all members of the community, irrespective of their ability to pay.METHODS: Sampling methodology was used to gather information in two phases, with the...AIM: To study a service model that enables a clinic to be open to all members of the community, irrespective of their ability to pay.METHODS: Sampling methodology was used to gather information in two phases, with the city of Indore as the target region. In the first phase, dental professionals were surveyed to gather the cost of the facility, land and equipment and the cost of sustaining the practice. In the second phase, the residents of Indore were surveyed to collect information regarding their oral health problems and their expenditure for the same. Assessing the current situation, the questions to answer are related to the issues of dental health care access problems and the resources required, human and financial.RESULTS:(1) People younger than 20 years of age form a large proportion(43%) of the population of the city and also a large proportion(54%) of people who visit dental clinics;(2) Dental caries are commonlyfound in the population younger than 20 years of age and mobile teeth in those older than 50 years of age;(3) Dental caries and mobile teeth are almost equally found in people of the age group 20-50 years old;(4) A significantly large proportion of those older than 50 years old have had all their teeth extracted; and(5) A significantly large proportion of the 20-30 years of age group has had no teeth extracted.CONCLUSION: The model which we propose works well for low income patients; however, it places a lot of extra burden on the higher income group. A lot of effort can be put into generating revenue from other sources, including events and donations.展开更多
In dental clinics with an open floor plan,the risk of patient-to-patient transmission of respiratory disease is a concern.During dental procedures large amounts of bioaerosol are produced and patients cannot wear pers...In dental clinics with an open floor plan,the risk of patient-to-patient transmission of respiratory disease is a concern.During dental procedures large amounts of bioaerosol are produced and patients cannot wear personal protective equipment.This paper examines how to effectively deploy air cleaner to reduce the infection risk in dental clinics with an open floor plan.Various locations of air cleaners at various clean air delivery rates(CADRs)were investigated.The dispersion of bioaerosol was studied through numerical simulations,and risk assessment was performed by a dose-response method.The findings indicated that dental patients downstream of the background ventilation have a higher infection risk than those to the left and right of an infected patient(i.e.,the source).The lowest infection risks for the adjacent patients were found when the air cleaner was place opposite to the dentists,i.e.,on the floor at low CADR levels of 2.2 m^(3)/min or on the bench at CADR levels of 4.4 m^(3)/min or greater.The results of this study indicated that air cleaner can mitigate the risk of patient-to-patient transmission of SARS-CoV-2 in dental clinics with an open floor plan.Background CADR levels determine the optimal placement of air cleaners.展开更多
Introduction: A dental abscess is a collection of pus located in the tissues surrounding the tooth roots. The aim of this work is to describe the epidemiological, clinical and therapeutic aspects of dental abscess in ...Introduction: A dental abscess is a collection of pus located in the tissues surrounding the tooth roots. The aim of this work is to describe the epidemiological, clinical and therapeutic aspects of dental abscess in order to contribute to the management of patients suffering from this pathology at the dental office of the Siguiri Prefectural Hospital. Methods: This was a retrospective descriptive study lasting 2 months carried out on the registers of patients received between October 2017 and October 2020 at the dental office of the Siguiri prefectural hospital. Results: 4690 patient files were identified during the study, of which 546 met our selection criteria, i.e. a frequency of 11.64%. During our study, we found 51.83% female compared to 48.17% male, i.e. a sex ratio of 1.07. 54.21% of our patients resided in rural communes compared to 45.76% for the urban commune. The age group most affected was that of 16 - 25 years old or 33.69%. Swelling, pain and functional discomfort were the reasons for consultation in all patients followed by other associated reasons in 41.21%. The premolar-molar group was the most represented, i.e. 86.70%. 80.04% of our patients presented an acute abscess compared to 19.96% of chronic cases. Antibiotic, analgesic, and mouthwash were prescribed in all patients during the study followed by 96.37% of cases prescription of steroidal anti-inflammatory drugs. 93.04% of causal teeth were extracted followed by 6.78% of cases of conservative treatment in our study. In our study, 80.95% of our patients had a good post-therapeutic outcome. Conclusion: This study highlights the need for prevention and early management of dental abscesses.展开更多
Background: Negative stress symptoms are reported in the literature among clinical dental and medical students and can include signs of anxiety or depression. However, very little has been researched about existing ps...Background: Negative stress symptoms are reported in the literature among clinical dental and medical students and can include signs of anxiety or depression. However, very little has been researched about existing psychological preconditions of these students that could make them more vulnerable to negative stress symptoms. Objective: The aims were to explore first year clinical dental and medical students’ experiences of stress intensity, stress sensitivity and signs of anxiety or depression. Gender was also explored as a possible predictor of these psychosocial phenomena. Methods: First year clinical students at Aarhus University dental (n = 49) and medical schools (n = 59) were recruited to fill out a 45-item questionnaire that comprised demographics and three scales: Cohens Perceived Personal Stress (PPS-10), Stress Sensitivity Inventory (SSI) and Depression Anxiety & Stress Scale (DASS-21). Groups and genders were compared by frequency and using association statistics, bivariate odds ratios, nominal logistic regression and ANOVA. Results: Stress intensity perceptions were moderate to high for many. Dental students scored higher than medical students on all mean test scores. In general, women showed higher levels of stress than men. Dental students scored significantly higher than medical students on Depression, Anxiety and Chronic Stress with ANOVA tests. However, when gender, age and medical or dental student status were added into a logistic regression analysis in which high stress sensitivity was the main dependent variable, only high scores in perceived stress intensity and signs of depression and anxiety showed significant main effects. Conclusion: Present study confirmed the literature that reports high degrees of stress among dental and medical students. But more importantly, Stress Sensitivity Inventory appeared to be a reliable and excellent predictor of high perceived stress and signs of depression and anxiety. It can be useful to detect and prevent student psychosocial dysfunction in clinical learning environments. An important challenge for medical and dental educational institutions is to provide specific student emotional support as early as needed as well as to consider appropriate stress prevention curriculum reforms.展开更多
Objective： The main purpose of this retrospective study is to evaluate clinical outcomes of Xive implants 3-year after insertion. Methods： 219 Xive implants were placed in 139 patients and their clinical effects wer...Objective： The main purpose of this retrospective study is to evaluate clinical outcomes of Xive implants 3-year after insertion. Methods： 219 Xive implants were placed in 139 patients and their clinical effects were evaluated using the Albrektsson Standard. Results：The 3-year survival rate of the Xive implants is 97.26%（213/2 1 9）. Eleven cases of immediate implants and 15 cases of implant insertion after maxillary sinus lifting all succeeded. The failure ratio is 6/219（2.74%） with failures resulting from excess bone loss in the implant region, peri-implant mucosal inflammation or continuous pain caused by some unknown reasons. Conclusion： Xive implants are clinically effective for the restoration of missing teeth. Immediate implant and implant following maxillary sinus lifting were also successful.展开更多
The key research and development steps for bioactive glass (45S5 Bioglass) are documented from the date of discovery in 1969 through FDA approvals of the first dental, ENT, maxillo-facial and orthopedic clinical produ...The key research and development steps for bioactive glass (45S5 Bioglass) are documented from the date of discovery in 1969 through FDA approvals of the first dental, ENT, maxillo-facial and orthopedic clinical products. Understanding the mechanisms and quantifying the rapid surface reactions to form a bone-bonding hydroxyl-carbonate apatite (HCA) layer on the bioactive glass in contact with living bone was a vital part of the early development of this class of biomaterials. A key later discovery was enhanced osteogenesis and in situ bone regeneration by controlled release of ionic dissolution products from the bioactive glass particulates that leads to up-regulation and activation of seven families of genes, a process called osteostimulation.展开更多
文摘This manuscript features the promising findings of a study conducted by Ju et al,who used graphene nanocomposites for air disinfection in dental clinics.Their study demonstrated that,compared with conventional filters,graphene nanocom-posites substantially improved air quality and reduced microbial contamination.This manuscript highlights the innovative application of graphene materials,emphasizing their potential to enhance dental clinic environments by minimizing secondary pollution.On the basis of the unique antimicrobial properties of gra-phene and the original study’s rigorous methodology,we recommend using gra-phene nanocomposites in clinical settings to control airborne infections.
基金Fund supported by the Youth Educational Scholar Program of Peking Union Medical College(2016ZLGC0712).
文摘Objective To investigate the feature and frequency of medical emergencies in dental clinics in China and the Methods A survey study was conducted among 2408 dentists who attended continuing educational courses held by Society of Sedation and Analgesia of Chinese Stomatological Association in 18 cities from December 2015 to December 2018.Demographic information of the dentists and the characteristics of medical emergencies they encountered were collected and analyzed.The associated demographic features for dentist experiencing medical emergencies were analyzed by logistic regression model.Results A total of 2013 dentists provided valid responses and reported 2923 events of medical emergencies in dental clinics.Among them,85.0%reported that they had encountered medical emergencies,and 35.5%had encountered at least twice.Syncope(35.9%)and hypoglycemia(30.3%)were the most common reported medical emergencies.Medical emergencies were most likely to occur during local anesthesia(49.9%),out-patient oral surgery(25.9%),and root canal treatment(11.3%).There were 6 patients(0.2%)died in emergencies.84.0%dentists reported that they had never received training courses about medical emergency management in dentistry other than Basic Life Support.Longer practicing time(10-15 years)(OR=0.59,95%CI:0.41-0.85,P=0.004),working in private dental facilities(OR=1.69,95%CI:1.20-2.38,P=0.003)were associated with an increased risk of experiencing medical emergencies.Conclusion More efforts are needed in prevention,early identification,and timely management of medical emergencies in dental clinics in order to prevent fatal outcomes.The results of this survey are useful information for re-designing emergency training courses for Chinese dentists.
文摘AIM: To study a service model that enables a clinic to be open to all members of the community, irrespective of their ability to pay.METHODS: Sampling methodology was used to gather information in two phases, with the city of Indore as the target region. In the first phase, dental professionals were surveyed to gather the cost of the facility, land and equipment and the cost of sustaining the practice. In the second phase, the residents of Indore were surveyed to collect information regarding their oral health problems and their expenditure for the same. Assessing the current situation, the questions to answer are related to the issues of dental health care access problems and the resources required, human and financial.RESULTS:(1) People younger than 20 years of age form a large proportion(43%) of the population of the city and also a large proportion(54%) of people who visit dental clinics;(2) Dental caries are commonlyfound in the population younger than 20 years of age and mobile teeth in those older than 50 years of age;(3) Dental caries and mobile teeth are almost equally found in people of the age group 20-50 years old;(4) A significantly large proportion of those older than 50 years old have had all their teeth extracted; and(5) A significantly large proportion of the 20-30 years of age group has had no teeth extracted.CONCLUSION: The model which we propose works well for low income patients; however, it places a lot of extra burden on the higher income group. A lot of effort can be put into generating revenue from other sources, including events and donations.
基金supported by a grant from the General Research Fund(no.17207121)grants from the Collaborative Research Fund(CRF)COVID-19 and Novel Infectious Disease(NID)Research Exercise,the Research Grants Council of the Hong Kong Special Administrative Region,China(Project no.PolyU P0033675/C5108-20G,C1105-20G and C7080-21GF).
文摘In dental clinics with an open floor plan,the risk of patient-to-patient transmission of respiratory disease is a concern.During dental procedures large amounts of bioaerosol are produced and patients cannot wear personal protective equipment.This paper examines how to effectively deploy air cleaner to reduce the infection risk in dental clinics with an open floor plan.Various locations of air cleaners at various clean air delivery rates(CADRs)were investigated.The dispersion of bioaerosol was studied through numerical simulations,and risk assessment was performed by a dose-response method.The findings indicated that dental patients downstream of the background ventilation have a higher infection risk than those to the left and right of an infected patient(i.e.,the source).The lowest infection risks for the adjacent patients were found when the air cleaner was place opposite to the dentists,i.e.,on the floor at low CADR levels of 2.2 m^(3)/min or on the bench at CADR levels of 4.4 m^(3)/min or greater.The results of this study indicated that air cleaner can mitigate the risk of patient-to-patient transmission of SARS-CoV-2 in dental clinics with an open floor plan.Background CADR levels determine the optimal placement of air cleaners.
文摘Introduction: A dental abscess is a collection of pus located in the tissues surrounding the tooth roots. The aim of this work is to describe the epidemiological, clinical and therapeutic aspects of dental abscess in order to contribute to the management of patients suffering from this pathology at the dental office of the Siguiri Prefectural Hospital. Methods: This was a retrospective descriptive study lasting 2 months carried out on the registers of patients received between October 2017 and October 2020 at the dental office of the Siguiri prefectural hospital. Results: 4690 patient files were identified during the study, of which 546 met our selection criteria, i.e. a frequency of 11.64%. During our study, we found 51.83% female compared to 48.17% male, i.e. a sex ratio of 1.07. 54.21% of our patients resided in rural communes compared to 45.76% for the urban commune. The age group most affected was that of 16 - 25 years old or 33.69%. Swelling, pain and functional discomfort were the reasons for consultation in all patients followed by other associated reasons in 41.21%. The premolar-molar group was the most represented, i.e. 86.70%. 80.04% of our patients presented an acute abscess compared to 19.96% of chronic cases. Antibiotic, analgesic, and mouthwash were prescribed in all patients during the study followed by 96.37% of cases prescription of steroidal anti-inflammatory drugs. 93.04% of causal teeth were extracted followed by 6.78% of cases of conservative treatment in our study. In our study, 80.95% of our patients had a good post-therapeutic outcome. Conclusion: This study highlights the need for prevention and early management of dental abscesses.
文摘Background: Negative stress symptoms are reported in the literature among clinical dental and medical students and can include signs of anxiety or depression. However, very little has been researched about existing psychological preconditions of these students that could make them more vulnerable to negative stress symptoms. Objective: The aims were to explore first year clinical dental and medical students’ experiences of stress intensity, stress sensitivity and signs of anxiety or depression. Gender was also explored as a possible predictor of these psychosocial phenomena. Methods: First year clinical students at Aarhus University dental (n = 49) and medical schools (n = 59) were recruited to fill out a 45-item questionnaire that comprised demographics and three scales: Cohens Perceived Personal Stress (PPS-10), Stress Sensitivity Inventory (SSI) and Depression Anxiety & Stress Scale (DASS-21). Groups and genders were compared by frequency and using association statistics, bivariate odds ratios, nominal logistic regression and ANOVA. Results: Stress intensity perceptions were moderate to high for many. Dental students scored higher than medical students on all mean test scores. In general, women showed higher levels of stress than men. Dental students scored significantly higher than medical students on Depression, Anxiety and Chronic Stress with ANOVA tests. However, when gender, age and medical or dental student status were added into a logistic regression analysis in which high stress sensitivity was the main dependent variable, only high scores in perceived stress intensity and signs of depression and anxiety showed significant main effects. Conclusion: Present study confirmed the literature that reports high degrees of stress among dental and medical students. But more importantly, Stress Sensitivity Inventory appeared to be a reliable and excellent predictor of high perceived stress and signs of depression and anxiety. It can be useful to detect and prevent student psychosocial dysfunction in clinical learning environments. An important challenge for medical and dental educational institutions is to provide specific student emotional support as early as needed as well as to consider appropriate stress prevention curriculum reforms.
文摘Objective： The main purpose of this retrospective study is to evaluate clinical outcomes of Xive implants 3-year after insertion. Methods： 219 Xive implants were placed in 139 patients and their clinical effects were evaluated using the Albrektsson Standard. Results：The 3-year survival rate of the Xive implants is 97.26%（213/2 1 9）. Eleven cases of immediate implants and 15 cases of implant insertion after maxillary sinus lifting all succeeded. The failure ratio is 6/219（2.74%） with failures resulting from excess bone loss in the implant region, peri-implant mucosal inflammation or continuous pain caused by some unknown reasons. Conclusion： Xive implants are clinically effective for the restoration of missing teeth. Immediate implant and implant following maxillary sinus lifting were also successful.
文摘The key research and development steps for bioactive glass (45S5 Bioglass) are documented from the date of discovery in 1969 through FDA approvals of the first dental, ENT, maxillo-facial and orthopedic clinical products. Understanding the mechanisms and quantifying the rapid surface reactions to form a bone-bonding hydroxyl-carbonate apatite (HCA) layer on the bioactive glass in contact with living bone was a vital part of the early development of this class of biomaterials. A key later discovery was enhanced osteogenesis and in situ bone regeneration by controlled release of ionic dissolution products from the bioactive glass particulates that leads to up-regulation and activation of seven families of genes, a process called osteostimulation.
