Coronavirus Disease 2019 (COVID-19): Emerging and Future Challenges for Dental and Oral Medicine

Brazilian dental students and COVID-19: A survey on knowledge and perceptions

OBJECTIVE

This study evaluated the knowledge and perceptions of Brazilian dental students about COVID-19 and the undergraduate clinical practice during the COVID-19 outbreak by a self-administered Web-based questionnaire.

METHODS

A social network campaign on Instagram was raised to approach the target population. The survey covered demographic and academic profile, general knowledge, preventive measures and perception about COVID-19. Descriptive statistics were used to identify frequencies and distributions of variables, which were compared by type of institution and current year of enrolment using the Chi-square or Fisher's exact tests (α = 0.05).

RESULTS

A total of 833 valid responses were received over 10 days. Students were able to identify the incubation period, main symptoms and contagious routes of the disease but struggled in recognising the name of the virus responsible for the pandemic. Hand washing before and after a dental appointment with a patient (97.7%) followed by the use of barriers to protect mucosa (97.2%) were the more frequently recognised measures to prevent COVID-19 spread in the dental office. As for the perception of COVID-19, 73.2% of the dental students perceived the disease as severe, whilst only 11.1% of them thought that COVID-19 is severe only for people presenting risk factors. Dental student's knowledge and perception were associated with the type of institution and year of enrolment.

CONCLUSION

In summary, the dental students demonstrated an acceptable general knowledge about COVID-19, but dental schools will need to address gaps in knowledge, preventive measures, and perceptions to ensure a safer return to in person activities.

Triage and urgent dental care for COVID-19 patients in the Hospital District of Helsinki and Uusimaa

OBJECTIVE

This paper describes and reports the patient-specific characteristics of an urgent dental care clinic for COVID-19 infected, suspected, exposed or quarantined patients from March to December 2020 in the Hospital District of Helsinki and Uusimaa, Finland.

MATERIAL AND METHODS

The triage and the treatment protocol were established based on the scientific data. Patient files were evaluated from the hospital district's electronic medical record system. IBM SPSS software was used for statistical analysis.

RESULTS

There were 1114 consultations and 257 visits at the clinic. Most of the patients were generally healthy with mean age of 35, had toothache and were suspected to be SARS-CoV-2 positive. Seventeen of the patients received positive tests for COVID-19 infection. The main treatment was tooth extraction, mostly due to caries. Statistically significant differences between COVID-19 infected and other patients occurred in age (45 vs 34 years-of-age, p = .009) and number of teeth (25 vs 28, p = .031). No SARS-CoV-2 infection transmission chains were traced to the clinic.

CONCLUSION

During the challenging pandemic time, patients were carefully screened by specialists in clinical dentistry and treated safely and effectively. Patient-specific characteristics revealed no differences between COVID-19 infected and other patients in terms of symptoms or treatment needs.

Bibliometric Analyses of Global Scholarly Output in Dentistry Related to COVID-19

Objective

The aim of this study was to evaluate the bibliometric profile of dental scientific production related to coronavirus disease-2019 (COVID-19) in Scopus (2019-2020).

Materials and Methods

This was a descriptive, observational, comparative, and retrospective study. All manuscripts on COVID-19 in dentistry were published between December 2019 and December 2020. The variables were measured objectively through Scopus (SciVal). For the extraction of the manuscripts, the following keywords were used: "Covid-19" and "Dentistry" with its multiple MeSH terms using the Boolean operators "OR" and "AND". On June 14, 2021, 843 manuscripts corresponding to the period January 2019 to December 2020 were downloaded, normalized, and refined through metadata analysis.

Results

The largest number of manuscripts was published in the International Journal of Current Research and Review, Oral Oncology, Oral Diseases, British Dental Journal, and Journal of Dental Education with 54, 50, 49, 48, and 44 manuscripts, respectively. These are the most productive indexed scientific journals on COVID-19. The most productive institutions were Saveetha University, Universidade de São Paulo, and King's College London, with 42, 33, and 27 manuscripts, respectively. In 2019, there were only two scientific publications on COVID-19. In 2020, the largest amount, 228 manuscripts, were published in Q1 journals, followed by 210 manuscripts in Q3 journals, and only 194 manuscripts were published in Q4 journals.

Conclusions

Currently, there is a notable increase in global academic production in Scopus on the impact of COVID-19 in dentistry, whereas Brazil is the only South American country with three highly productive universities.

Efficacy of Dental Barriers in Aerosols and Splatters Reduction During an Ultrasonic Scaling: An In-vitro Study

BACKGROUND

Barrier enclosure systems were suggested as the protective equipment for aerosol-generating procedures.

OBJECTIVE

The aim of this study was to investigate the efficiency of dental barriers in aerosols and splatters reduction during an ultrasonic scaling.

MATERIALS AND METHODS

Two types of dental barriers: (1) metal frame with plastic wrap (MFPW) and (2) plastic shield chamber (PSC) were investigated. Ultrasonic scaling was performed on dental phantom head with and without the use of dental barriers. To detect the splatter contamination, the water system of the scaler was circulated with 0.1% fluorescein dye and filter papers were set at several parts of dental chair, body of an operator, and assistance. For bioaerosol production, water containing 10⁷ colony-forming unit (CFU)/mL of Lactobacillus acidophilus was used as a water coolant system of the scaler.

RESULTS

The total surface contamination found on the body of the operator was significantly decreased when using both MFPW and PSC barriers (P < 0.05). A significant reduction on the assistant's body and the dental chair was only observed when PSC was used (P < 0.05). For bacterial aerosols, both barriers significantly reduced the number of bacterial colonies when compared with no barrier used (P < 0.05). The percentages of total colonies reduction for MFPW and PSC were 78.13 (±1.69) and 69.24 (±2.49), respectively. However, no difference in the total number of bacterial colonies was observed between the two types of barriers.

CONCLUSION

A dental barrier system was effective in aerosols and splatters reduction during an ultrasonic scaling.

Oral health in Brazil: What were the dental procedures performed in Primary Health Care?

This cross-sectional study aims to describe the primary dental care procedures performed by Oral Health Teams (OHTs), adhering to the third cycle of the "National Program for Improving Access and Quality of Primary Care" (PMAQ-AB) in Brazil. A descriptive analysis was performed through 26 dental procedures, including spontaneous, preventive, restorative/prosthetic and surgical procedures, and actions of cancer monitoring. Each conducted procedure assigned a score to the OHT, the final score being the sum of the number of procedures performed by the OHTs. These scores were then compared among the geographic regions of the country. Most OHTs perform basic dental procedures, such as supragingival scaling, root planning and coronal polishing (98.1%), composite filling (99.0%), and permanent tooth extraction (98.6%). The frequency related to dental prosthesis and monitoring of oral cancer decreased. Only 12.9% of the OHTs carries out biopsies, 30.9% monitor patients undergoing biopsy, 15.1% carry out impression for prostheses, and 13.6% carry out prostheses’ installation. The scores reveal that OHT’s performed, on average, 19.45 (±3.16) dental procedures. The OHTs in the South, Southeast, and Northeast had a higher number of primary dental procedures, while the teams in the North and Midwest performed, on average, fewer procedures. The Brazilian regions with the highest dental need have the lowest number of dental procedures. It is necessary to increase the range of procedures offered by OHT and reduce regional inequalities, adapting to the needs of the population in order to achieve comprehensive oral health.

Effect of enveloping and disinfection methods on artefact formation on enveloped PSP plate images

Objectives

To investigate the artefacts caused by different disinfection and protection methods that can be used for infection control of photostimulable phosphor (PSP) plates.

Methods

The plates that were enveloped with single or double envelopes were sprayed with an alcohol-containing solution or wiped with an alcohol-containing tissue. Four PSP groups with two plates in each group were formed (A = wiping single envelope, B = wiping double envelopes, C = spraying onto single envelope, and D = spraying onto double envelopes). Any artefacts (1 = no artefact, 2 = presence of artefact less than 0.5 cm wide, and 3 = presence of artefact larger than 0.5 cm wide) on the 12 acquired images were evaluated.

Results

Artefacts (score-3) occurred on the images of Group C-2 PSP plate after the 3rd exposure. According to the Kruskal–Wallis test the difference between the artefact score of the four methods was found significant. Post-hoc comparisons showed the Group C artefact scores were higher than the others and the difference was significant. The total time of enveloping and disinfection processes for groups was; A = 6.30 min, B = 7.58 min, C = 5.48 min, and D = 7.14 min.

Conclusions

Regardless of the number of envelopes, wiping with a tissue was less likely to cause artefacts, while spraying was reliable only when double envelopes were used. However, using a tissue and double envelopes, which are less risky in terms of artefact, causes time loss, difficulty in manipulation, environmental pollution and high cost.

A qualitative analysis of dental professionals' beliefs and concerns about providing aerosol generating procedures early in the COVID-19 pandemic

INTRODUCTION

In response to the COVID-19 pandemic, the Scottish Dental Clinical Effectiveness Programme (SDCEP) initiated a rapid review of the evidence related to the generation and mitigation of aerosols in dental practice. To support this review, a survey was distributed to better understand the provision of aerosol generating procedures (AGPs) in dentistry.

METHODS

An online questionnaire was distributed to dental professionals asking about their current practice and beliefs about AGPs. Data were analysed using qualitative content analysis.

RESULTS

Analysis revealed confusion and uncertainty regarding mitigation of AGPs. There was also frustration and scepticism over the risk of SARS-COV-2 transmission within dental settings, the evidence underpinning the restrictions and the leadership and guidance being provided, as well as concern over financial implications and patient and staff safety.

DISCUSSION

The frustration and concerns expressed by respondents mirrored findings from other recent studies and suggest there is a need for reflection within the profession so that lessons can be learned to better support staff and patients.

CONCLUSION

Understanding the profession's views about AGP provision contributed to the SDCEP rapid review and provides insights to help inform policymakers and leaders in anticipation not only of future pandemics but in considering the success of any large scale and/or rapid organisational change.

Self-Reported Dietary Choices and Oral Health Care Needs during COVID-19 Quarantine: A Cross-Sectional Study

The COVID-19 pandemic significantly impacted the healthcare system, including dentistry. However, it is not entirely clear whether affected patients' willingness for regular dental visits and preventive behaviors with regards oral hygiene and diet. This is essential to understanding the potential effects of the COVID-19 pandemic on the acceleration of dental issues in the future. It was aimed at checking the level of dental visit avoidance, self-reported oral health needs, and dietary changes. This cross-sectional questionnaire study conducted in Poland (n = 2574; mean age 44.4 ± 15.6; female 56.3%) assessed nutritional habits and dental care changes during the COVID-19 pandemic. As demonstrated, nearly half of the responders (47.1%) avoided regular dental visits, while only 0.5% used online consultations. Fears related to potential cross-contamination in dental offices dropped from 25% to 11.4% and were associated with increased BMI and age (p < 0.05). Sweet snacking/drinking confirmed 19.1%/33.2% subjects. Self-reported oral health care needs (tooth stain, calculus, gingivitis, loss of fillings) were related to frequent snacking and poor oral hygiene (p < 0.05). The study highlights that pandemic periods are covered by eating and drinking changes combined with inadequate hygiene and dental care impose health complaints in the oral cavity. This can magnify both nutritional and interrelated oral health issues, highlighting the need to implement preventive and mitigation measures.

Changes in paediatric dental clinic after reopening during COVID-19 pandemic in Wuhan: a retrospective study

OBJECTIVES

Affected by COVID-19 pandemic, The Department of Paediatric Dentistry of School and Hospital of Stomatology, Wuhan University was closed in late January 2020, and resumed on 20 April. Our study aimed to explore the effects of COVID-19 pandemic on paediatric dental services which might assist global paediatric dentists to build confidence and make appropriate policies under the pandemic.

DESIGN

A retrospective study was performed. Medical records of patients were retrieved but without any private information, including patient name, ID number and address.

PARTICIPANTS

All data of the patients from 20 April to 31 July in 2020 and 2019 were extracted and analysed including demographics, dental diagnosis and treatment methods. A total of 18 198 patients were included in the study.

RESULTS

During this period, no medical staff or patient was infected with COVID-19 due to dental services. A total of 6485 in 2020 but 11 713 during the same period in 2019 visited the department. Compared with 2019, gender distribution did not change, but age distribution changed with an increase under 6-year-old. The diagnoses including caries, retained primary teeth, malocclusion, deep pits and fissures changed significantly, while pulpitis, apical periodontitis, tooth trauma, early loss of primary teeth, supernumerary teeth showed little change. Aerosol generating procedures were adopted less frequently overall in this period.

CONCLUSIONS

The reopening of paediatric dental services is proceeding steadily with significant changes in the characteristics of the patients and treatment procedures.

Delaying Intraoral Radiographs during the COVID-19 Pandemic: A Conundrum

BACKGROUND

The COVID-19 pandemic has made dentists very assiduous about cross-infection during dental treatment, thereby delaying dental radiographs for treatment. However, patients needing dental emergency treatment in the ongoing pandemic require relevant intra/extraoral dental radiography for adequate diagnosis and treatment planning.

METHODS

This article is aimed at adding to the hot debate: Is delay for intraoral radiographs justified or a possible proxy? As a narrative review, it provides an insight into the reasons for delaying intra-oral dental radiographs during in the pandemic and options of the nontraditional radiographic techniques available until the pandemic subsides. Discussion and Conclusion. Cross-contamination concerns through respiratory droplets grow while using intraoral film holders that stimulate gag reflex, coughing, saliva secretion, and if proper disinfection protocols are not applied. Since the patients' acquiring emergency dental treatment cannot be neglected, the return-to-work guidelines by the health regulatory bodies urge to prioritize extraoral radiographic imaging techniques to curb the infection, offering the best diagnostic efficacy. The dental professionals can consider cone-beam computed tomography (CBCT) scans and sectional dental panoramic radiographs (SDPRs), followed by a risk assessment for COVID-19, a safer modality in reducing cross-contamination and assuring an innocuous environment for both patient and coworkers.

Dentistry during COVID-19: patients' knowledge and satisfaction toward health protocols COVID-19 during dental treatment

BACKGROUND

Coronavirus disease 2019 (COVID-19) as an infectious disease primarily spreading through droplet infection in dental treatment. Patient satisfaction is an indicator of healthcare quality service. Quality of healthcare service and patient satisfaction has been affected by the COVID‑19 pandemic. This study aims to assess the knowledge and satisfaction toward health protocols COVID-19 during dental treatment among dental patients.

METHODS

An institutional-based cross-sectional study was conducted on 270 dental patients using a self‑designed questionnaire consisting of knowledge and satisfaction about health protocols COVID-19 during dental treatment through a random sampling technique. Data were imported to SPSS version 21 for analysis. Descriptive and analytical statistics were used to identify the factors associated with their knowledge and satisfaction. A p value < 0.05 was considered statistical significance.

RESULTS

Totally, 270 dental patients with mean age of 37.6 ± 6.7 years participated in the study. The mean knowledge score was 36.7 ± 3.5, as considerable number of participants were unaware about the risk associated with dental treatment as well as restrictions imposed on dental procedures. About 18% of participants experienced one or other form of dental complaints during the lockdown period. The overall level of patient satisfaction was 44.6%.

CONCLUSION

It can be concluded that, public knowledge is to be improved about risk of virus transmission that can be related with dental treatment and also people should be encouraged to use virtual facilities, such as teledentistry, so that no dental emergencies is left untreated during the pandemic time. In addition, the level of satisfaction was in a medium level for dental patients in the study area. Specifically, we deduced from the results that social/physical distancing measures are one of the mechanisms to decrease the fear of exposure to the COVID-19.

Factors causing stress in postgraduate dental students during COVID-19 pandemic: A cross-sectional survey

Background:

COVID-19 pandemic has impacted the academic and clinical training of postgraduate dental students. This study aimed to assess various factors causing psychological stress in them, and the extent of stress perception during pandemic.

Materials and Methods:

In this cross-sectional study, 250 postgraduate students from nine dental colleges of Haryana and National Capital Region, India, responded to an online questionnaire sent electronically to them in September 2020, which included modified dental environment stress (DES) score, Perceived Stress Scale (PSS), and questions regarding COVID-associated stress (CAS). Students already diagnosed with any psychiatric disorder or having a history of any major adverse event during the last 6 months likely to affect their psychological health were excluded from this study. The data obtained were analyzed using Chi-square test, Independent t-test, univariate ANOVA with post hoc tests, Pearson moment correlation, and multiple hierarchical regression tests. P < 0.05 was considered statistically significant.

Results:

DES score was moderate for 48.8% and high for 34.4% of the participants. PSS was moderate for 69.2% and high for 18.8% of the participants. The most stressful factor in dental environment was the pattern of university examination, while the most stressful factor specific to COVID-19 was the fear of family members contracting the infection. PSS score was significantly higher in female participants. DES and CAS scores were significantly higher in students staying in hostels. Multiple hierarchical regression model depicted gender, mean health, and DES score as significant predictors of PSS.

Conclusion:

Postgraduate dental students reported the adverse impact of COVID-19 pandemic upon their training and prospects as a reason for the increase in stress.

Knowledge About Biosafety Measures in Clinical Setting During the COVID-19 Pandemic: A Cross-Sectional Study With Brazilian Dental Students

OBJECTIVE

The aim of this study is to evaluate the knowledge of Brazilian dental students about biosafety measures that should be adopted in the clinical setting during the coronavirus disease (COVID-19) pandemic.

METHODS

A cross-sectional study with 1050 dental students was conducted. A semi-structured questionnaire was shared with students. Mean knowledge score on biosafety guidelines during the COVID-19 pandemic was the outcome, with a maximum of 8 scores. Explanatory variables included sociodemographic and educational characteristics, aspects related to biosafety education, actions adopted by the dental schools during the pandemic, and sources of biosafety information. Multivariate linear regression analyses were performed.

RESULTS

Mean knowledge score was 5.19 (1.28). Female students (β = 0.346; 95% CI: 0.154-0.539), those enrolled in the intermediate (β = 0.525; 95% CI: 0.167-0.883) or final (β = 0.569; 95% CI: 0.200-0.937) stage of course, and those who had already received theoretical-practical training in biosafety (β = 0.464; 95% CI: 0.063-0.866) presented higher mean knowledge scores. Students who did not receive guidance on aerosol control measures before the pandemic (β = -0.324; 95% CI: -0.519 to -0.130) had the lowest score.

CONCLUSION

Students presented a medium level of knowledge about dental biosafety measures concerning the COVID-19 pandemic. Sociodemographic characteristics and those related to the institutional profile of the participants, and access to orientation and training in biosafety, may influence their knowledge.

Incidence of Arterial Hypertension in People With Periodontitis and Characterization of the Oral and Subgingival Microbiome: A Study Protocol

Cardiovascular diseases are the leading cause of morbidity and mortality worldwide. High blood pressure in particular, continues to increase throughout the global population at an increasingly fast pace. The relationship between arterial hypertension and periodontitis has been recently discussed in the context of its origins and implications. Particularly relevant is the role of the periodontal microbiome linked to persistent local and systemic inflammation, along with other risk factors and social determinants of health. The present protocol will investigate/assess the association between periodontal disease and its microbiome on the onset of hypertension, within a cohort from Mexico City. One thousand two hundred twelve participants will be studied during a 60-month period. Studies will include analysis of periodontal conditions, sampling and sequencing of the salivary and subgingival microbiome, interviews on nutritional and lifestyle habits, social determinants of health, blood pressure and anthropometric measurements. Statistical associations and several classic epidemiology and machine learning approaches will be performed to analyze the data. Implications for the generation of public policy—by early public health interventions or epidemiological surveillance approaches—and for the population empowerment—via the establishment of primary prevention recommendations, highlighting the relationship between oral and cardiovascular health—will be considered. This latter set of interventions will be supported by a carefully planned science communication and health promotion strategy. This study has been registered and approved by the Research and Ethics Committee of the School of Dentistry, Universidad Nacional Autónoma de México (CIE/0308/05/2019) and the National Institute of Genomic Medicine (CEI/2020/12). The umbrella cohort was approved by the Institutional Bioethics Committee of the National Institute of Cardiology-Ignacio Chavez (INC-ICh) under code 13-802.

Infection Risk Prediction Model for COVID-19 Based on an Analysis of the Settlement of Particles Generated during Dental Procedures in Dental Clinics

Background

The health emergency declaration owing to severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has drawn attention toward nosocomial transmission. The transmission of the disease varies depending on the environmental conditions. Saliva is a recognized SARS-CoV-2 reservoir in infected individuals. Therefore, exposure to fluids during dental procedures leads to a high risk of contagion.

Objective

This study aimed to develop an infection risk prediction model for COVID-19 based on an analysis of the settlement of the aerosolized particles generated during dental procedures.

Materials and Methods

The settlement of aerosolized particles during dental aerosol-generating procedures (AGPs) performed on phantoms was evaluated using colored saliva. The gravity-deposited particles were registered using a filter paper within the perimeter of the phantom head, and the settled particles were recorded in standardized photographs. Digital images were processed to analyze the stained area. A logistic regression model was built with the variables ventilation, distance from the mouth, instrument used, area of the mouth treated, and location within the perimeter area.

Results

The largest percentage of the areas stained by settled particles ranged from 1 to 5 µm. The maximum settlement range from the mouth of the phantom head was 320 cm, with a high-risk cutoff distance of 78 cm. Ventilation, distance, instrument used, area of the mouth being treated, and location within the perimeter showed association with the amount of settled particles. These variables were used for constructing a scale to determine the risk of exposure to settled particles in dentistry within an infection risk prediction model.

Conclusion

The greatest risk of particle settlement occurs at a distance up to 78 cm from the phantom mouth, with inadequate ventilation, and when working with a high-speed handpiece. The majority of the settled particles generated during the AGPs presented stained areas ranging from 1 to 5 µm. This model was useful for predicting the risk of exposure to COVID-19 in dental practice.

Adherence to COVID-19 Preventive Measures among Dental Care Workers in Vietnam: An Online Cross-Sectional Survey

An online cross-sectional survey using a "snowball" sampling method was carried out to assess the adherence to COVID-19 preventive measures among dental care workers (DCWs) during the pandemic. Six questions concerning the COVID-19 preventive guidelines issued by the Vietnam Ministry of Health were used to evaluate DCWs' adherence to preventive measures at dental care clinics. The quality of life of DCWs was assessed using the WHO-5 questionnaire and was defined as low if the total score was less than 13 points. Factors relating to adherence to COVID-19 prevention measures of DCWs were determined by multivariate linear regression analysis. In total, 514 DCWs completed the questionnaire. A total of 37% DCWs rated their quality of life as low. Regression analysis suggested that older age, a better quality of life, living in an urban area, and training on COVID-19 prevention were associated with better adherence to COVID-19 preventive measures, while being a dentist and lack of personal protective equipment was associated with less adherence to COVID-19 preventive measures. The pandemic had a significant negative impact on the physical and mental health of DCWs. Therefore, specific national guidelines for the prevention and control of the spread of COVID-19 in dental facilities should be issued.

Awareness and Knowledge of COVID-19 Among Health Care Workers in Early Phase of COVID-19 Pandemic

OBJECTIVE

The study aims to evaluate the awareness and knowledge of COVID-19 among healthcare workers.

MATERIAL AND METHODS

A questionnaire was applied to healthcare workers working at Kocaeli University Faculty of Medicine and University of Kyrenia, Dr. Suat Günsel Hospital, to evaluate the coronavirus disease 2019 awareness and level of knowledge.

RESULTS

A total of 598 healthcare workers participated in the study. Two-thirds of the respondents were from Turkey, while one-third were from the Turkish Republic of Northern Cyprus. The general symptoms of coronavirus disease 2019 were well known in the general population. Awareness of most symptoms was significantly lower in the Turkish Republic of Northern Cyprus group. It was well known that coronavirus disease 2019 can be asymptomatic in some patients and it can be contagious. The necessity of wearing surgical masks on sick individuals was less known in the Turkish Republic of Northern Cyprus group (96.6% vs 61.6%; P = .000). While handwashing was found similar in both groups for protection from coronavirus disease 2019 transmission, social distance and mask recommendations were lower in the Turkish Republic of Northern Cyprus group (P < .05). The concern about transmitting the virus to themselves and their relatives was more significant in the Turkish Republic of Northern Cyprus group than the Turkey group (84.4% vs 96.5%; P = .000). And 92.2% of the healthcare workers thought they should stay in an alternative place instead of their homes.

CONCLUSION

The awareness and knowledge level of coronavirus disease 2019 is higher in Turkey than in Turkish Republic of Northern Cyprus related to the increased number of coronavirus disease 2019 cases in Turkey. Continuous education programs can contribute to improving the level of knowledge and reducing anxiety.

Effectiveness of screen-to-screen and face-to-face learning modalities in dental anatomy module during Covid-19 pandemic

The Covid-19 pandemic has forced all dentistry faculties to quickly shift to the online supplementation or replacement of traditional modules to pursue education. However, there is limited research evaluating the effectiveness of this education modality on student performance in dental anatomy and manipulation module. Accordingly, it was aimed to compare the influence of different education modalities on the performances of the students enrolled in this module. The students were requested to perform 11 practical assignments throughout the fall term. A total of 220 face-to-face-educated (F2F) and 138 screen-to-screen-educated (S2S) students were included. To evaluate the influence of education modality on the performances of the students, cumulative success scores were calculated and compared using an independent t-test. The grades of the first (maxillary central), sixth (maxillary premolar), and eleventh assignments (mandibular first molar) were also analyzed to understand the manipulation-skill progress of each student within the same year. The grades of above-mentioned three assignments were converted into nominal data (excellent, very good, good, acceptable, and fail) based on certain thresholds, and a chi-square test was conducted. The cumulative success scores in F2F group were significantly lower than those in S2S group (P = 0.02). Differences between the first and eleventh tasks in both education modalities were significant (P < 0.05). The S2S-educated students achieved significantly higher achievement points in the sixth and eleventh assignments (P < 0.001). The S2S education can be suggested as an applicable modality for teaching dental anatomy and manipulation module. However, further work is needed to ascertain whether this result is replicable throughout dental anatomy education.

Evaluation of the knowledge and attitudes about dental practices of Turkish parents who visited the pedodontics clinic in Tokat Gaziosmanpaşa University, during the COVID-19 pandemic

PURPOSE

This study aimed to evaluate parents' knowledge and attitudes about dental practices who visited a pedodontics clinic during the COVID-19 pandemic.

METHODS

In the present work, data were collected via questionnaires from 475 parents who brought their children (between 0 and 14 years old) to our clinic for routine pedodontic examinations. The data obtained were analyzed using Microsoft Excel. Frequency and percentage values of answers to questions were obtained.

RESULTS

The majority of the participants (67.9%) indicated sufficient knowledge about COVID-19. Although 75% of parents were fearful and worried about the possibility of contracting virus during admission to the hospital, it was observed that 92% of them highly counted on the measures taken by their dentists and 72% did not hesitate to take their children to dentists during the pandemic.

CONCLUSION

Within the limitations of the present study, it has been shown that despite the increased level of parents' knowledge about the pandemic, it was evident that anxiety and fear were present when visiting hospitals/clinics as a result of the possible transmission due to the high number of COVID-19 cases. Therefore, it is necessary to conduct further studies on how to increase public awareness of the transmission routes of aerosols released during dental treatments.

COVID-19 induced stress among dentists affecting pediatric cooperation and alter treatment of choice

Objectives

To assess the effect of the COVID-19 pandemic on self-rated stress levels among dentists who treated children during the outbreak and pediatric patient cooperation during dental treatments.

Methods and materials

This cross-sectional study was assessed by enrolling an online questionnaire among dental practitioners treated children during April 2020.

Results

Dentists with higher COVID-19-induced distress reported a lower degree of pediatric patient cooperation during dental treatments than dentists with lower reported stress (p value < 0.01). Additional factors negatively impacting patient cooperation were degree of professional practitioner seniority in pediatric dentistry, and perceived knowledge about the COVID-19 disease infectivity and feeling protective against viral transmission with Personal Protective Equipment (PPE). Also, stress levels among dentists treating children influenced medical decisions, such as the selected treatment approach influenced by COVID-19 considerations.

Conclusion

The COVID-19 pandemic has adverse effects on clinicians and pediatric patients. Educational programs should be developed to advance dental staff.

[Recent Developments and Future Directions of Oral Healthcare System and Dental Public Health System in China in Light of the Current Global Emergency]

The study is aimed to help promote the development of the oral healthcare system and dental public health system in China and to help achieve the goal of improving the nation's oral health. We herein provided an overview and critical evaluation of recent developments in oral healthcare systems and dental public health systems in China and other countries, and discussed a number of potential directions for the future development of dental public health. The current global public health emergency of the coronavirus disease 2019 (COVID-19) pandemic was also taken into account in our discussions. Thus, to facilitate the accomplishment of the goals of the Healthy China 2030 Program, we suggested the establishment of a community-based, prevention-oriented model for the oral healthcare system and dental public health system. The model we proposed features the integration of oral and general health services, the utilization of technological innovations and big data concerning health, and a forceful promotion of remote dental services focused on prevention and early diagnosis and treatment. Furthermore, under the background of COVID-19 becoming a normal part of people's lives, we should adopt differentiated prevention and protection measures and emergency response preplans appropriate for the actual epidemic situation of a particular region so that clinical services are strengthened while unnecessary wastes of resources are avoided. We should actively explore for alternative approaches to care in the face of special circumstances.

Cordycepin as a Promising Inhibitor of SARS-CoV-2 RNA Dependent RNA Polymerase (RdRp)

BACKGROUND

SARS-CoV-2, which emerged in Wuhan, China, is a new global threat that has killed millions of people and continues to do so. This pandemic has not only threatened human life but has also triggered economic downturns across the world. Researchers have made significant strides in discovering molecular insights into SARSCoV- 2 pathogenesis and developing vaccines, but there is still no successful cure for SARS-CoV-2 infected patients.

OBJECTIVE

The present study has proposed a drug-repositioning pipeline for the design and discovery of an effective fungal-derived bioactive metabolite as a drug candidate against SARS-CoV-2.

METHODS

Fungal derivative "Cordycepin" was selected for this study to investigate the inhibitory properties against RNA-dependent RNA polymerase (RdRp) (PDB ID: 6M71) of SARS-CoV-2. The pharmacological profile, intermolecular interactions, binding energy, and stability of the compound were determined utilizing cheminformatic approaches. Subsequently, molecular dynamic simulation was performed to better understand the binding mechanism of cordycepin to RdRp.

RESULTS

The pharmacological data and retrieved molecular dynamics simulations trajectories suggest excellent drug-likeliness and greater structural stability of cordycepin, while the catalytic residues (Asp760, Asp761), as well as other active site residues (Trp617, Asp618, Tyr619, Trp800, Glu811) of RdRp, showed better stability during the overall simulation span.

CONCLUSION

Promising results of pharmacological investigation along with molecular simulations revealed that cordycepin exhibited strong inhibitory potential against SARSCoV- 2 polymerase enzyme (RdRp). Hence, cordycepin should be highly recommended to test in a laboratory to confirm its inhibitory potential against the SARS-CoV-2 polymerase enzyme (RdRp).

A national survey evaluating the knowledge and attitude of health-care workers of Saudi Arabia about Coronavirus infection

Background and Objectives:

Health-care workers (HCWs) are playing an instrumental role in combating coronavirus infection (COVID-19). While rendering their services, they also run the risk of cross-contamination. Hence, it is important to evaluate and correlate the knowledge and attitude of HCWs of Saudi Arabia about COVID-19.

Materials and Methods:

A prospective, nationwide, questionnaire-based survey was conducted after getting the approval from the institutional ethical board. A validated and reliable questionnaire was constructed, developed on the Qualtrics software, and circulated through an electronic medium across the country. The questionnaire had a total of 29 questions regarding knowledge and attitude about COVID-19. Through convenience sampling, the data were collected from a total sample of 1553 HCWs. Based on the primary area of expertise, the sample was categorized into three study groups with 1040 medical health-care professionals (MHCPs) (Group I), 318 dental health-care professionals (DHCPs) (Group II), and 195 allied health-care professionals (AHCPs) (Group III). Univariate and multivariate logistic regression analysis was done using SPSS v. 21, where P < 0.05 was considered statistically significant.

Results:

Female HCWs (P = 0.003) were shown to have a higher (adjusted odds ratio [aOR]: 1.46; confidence interval [CI]: 1.19–1.79) risk of inadequate knowledge in comparison to male HCWs. With respect to qualification, HCWs with doctorate qualification (P = 0.005) (aOR: 0.39; CI: 0.2–0.75) had shown to have adequate knowledge compared to their counterparts. AHCPs were shown inadequate knowledge (P < 0.001; aOR: 2.36; CI: 1.65–3.38), but adequate attitude (P < 0.001; aOR: 0.13; CI: 0.09–0.2) compared to MHCPs and DHCPs.

Conclusion:

MHCPs were shown to have the most appropriate level of knowledge, whereas AHCPs outscore other counterparts of HCWs with respect to attitude toward COVID-19. Emphasis should be directed to the whole community of HCWs in enhancing their awareness and practice attitude toward the novel infection of COVID-19.

Improving safety in dental practices during the COVID-19 pandemic

Coronavirus disease 2019 (COVID-19) is caused by a novel coronavirus, known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). It originated from the Chinese city of Wuhan and very quickly became a challenging public health problem. On 11 March 2020, the World Health Organization termed this potentially deadly disease a pandemic due to its rapid spread in various parts of the world, giving rise to international health emergencies. This virus is transmitted from human to human in the form of respiratory droplets, and in specific circumstances, airborne transmission may occur. Additional sources of exposure for dentists include blood and infected sharps. Due to the contagious nature of COVID-19 many health care providers have also been disproportionately affected, such as physicians, dentists, nurses, and paramedical staff. Dentists and dental staff are at high risk of cross-infection due to their nature of work. Therefore, they face a dual challenge in protecting themselves and their patients from infection transmission while ensuring that patients receive urgent dental care. In this review, the authors highlight the epidemiology, modes of cross-infection, and recent data on SARS-CoV-2 related to dental practice. The primary purpose is to make dental health care providers aware of the pathophysiology of COVID-19 and to increase their preparedness and understanding of this challenge, which will aid in controlling transmission. The information collected will be useful for the dental community in providing effective patient management through evidence-based recommendations for infection control and disinfection protocols.

The Attitude, Perception, and Mental Health of Patients Receiving Orthodontic Treatment During the COVID-19 Pandemic in Saudi Arabia

PURPOSE

The COVID-19 pandemic has forced dental clinics to shut down indefinitely, leaving thousands of orthodontic patients in unending fear and dismay. The study aimed to assess the attitude, perceptions and mental health status of patients undergoing orthodontic treatment in Saudi Arabia during the lockdown.

PATIENTS AND METHODS

A cross-sectional study was conducted among orthodontic patients of different clinics across Saudi Arabia and selected using two-stage clustered sampling. A validated Arabic questionnaire comprising four sections including demographic data, patients' interactions, attitude and perception, and Kessler Psychological Distress Scale was sent via digital means. Descriptive and inferential statistics were applied with the level of significance set to p<0.05.

RESULTS

A total of 512 orthodontic patients voluntarily participated in the study. Eighty-four percent of the patients contacted their orthodontist once or twice during this period, 22% percent did not receive any communication from their orthodontist, 18% were very worried about not being able to continue their treatment, 72% were concerned about the treatment duration increasing post lockdown, 18% suffered cuts or lacerations due to their appliance, and 32% had poking wires. Seventy-six percent of patients were willing to visit a clinic post lockdown only with proper preventive measures in place. A mild level of mental distress (22.76 ± 8.69) was reported using the Kessler Psychological Distress Scale. Female orthodontic patients >25 years of age with >1 year of ongoing treatment were associated with higher levels of mental distress.

CONCLUSION

The current pandemic has impacted the mental health status of orthodontic patients in some form or another. Older females with longer treatment times were more affected by the lockdown. The lack of effective communication from the orthodontist led to some negative perceptions about their treatment.

Knowledge and anxiety for dental treatments due to COVID-19 among general public

Introduction:

The fears, anxiety, and worries created among general population by COVID-19 are severe. The procedures which generate aerosols transmit most of COVID-19 transmission and we know one such procedure is dental treatment. After the COVID-19 pandemic, there is a change in health-care services; hence, this droplet transmission in dentistry became an issue which needs to be addressed.

Methodology:

A descriptive, online questionnaire survey was conducted among adults above 20 years. The questionnaire consisted of demographic details and questions related to anxiety and fear of considering dental treatment during this pandemic situation.

Results:

680 people responded for the study, among which 32% had COVID symptoms. 27% of them said that they are afraid of dental treatment during the pandemic whereas 47% said that they will accept if there is an emergency. The main reason for this fear was droplet infection in dental clinics.

Conclusion:

The fear of dental treatment during pandemic is moderate. This may be due to the self-care, positive behavior toward oral care by the people, and fear of cross-contamination due to airborne infections though the personal protective measures were followed.

Changes in International Student Mobility amid the COVID-19 Pandemic and Response in the China Context

International student mobility is an important indicator of the internationalization of higher education, and an important way to cultivate talents with global has had a huge impact on the mobility of international students. Specifically, the scale of international student mobility has decreased, changes in the geographic pattern of international student mobility have intensified, the form of international student mobility has changed, and the competition in the international study abroad market has intensified. As a major country that sends and receives international students, China has adopted a series of response measures to reduce the impact of the pandemic on international student mobility and has formulated a long-term development strategy to promote the mobility of international students. To promote international student mobility in the post-epidemic period, countries should provide support for international students from home and abroad, promote the diversification of international student mobility, and strengthen internationalization at home.

Adesão às normas de biossegurança para Covid-19 entre profissionais de saúde bucal em Ponta Grossa-PR

RESUMO O objetivo do trabalho foi descrever a adesão às normas de biossegurança para o enfrentamento da Covid-19 entre profissionais de saúde bucal no município de Ponta Grossa-PR. Estudo transversal e descritivo, realizado com amostra de conveniência de Cirurgiões-Dentistas (CD), Técnicos em Saúde Bucal (TSB) e Auxiliares em Saúde Bucal (ASB) dos serviços odontológicos públicos e privados em nível ambulatorial. A coleta ocorreu entre agosto e outubro de 2020, com questionário on-line enviado por e-mail via Conselho Regional de Odontologia e mídias sociais. Dos 106 profissionais de saúde bucal incluídos, 79,2% eram CD; 16%, ASB; e 4,8%, TSB. A maioria não tinha condição de risco para Covid-19 (90,6%), trabalhava em clínicas da atenção básica (54%) e não interrompeu ou se afastou do serviço (44,3%). Em relação aos atendimentos, 49,1% restringiram os atendimentos somente em casos de urgência e emergência, 33% evitaram procedimentos que geravam aerossóis. A maioria adotou uso do face shield (75,5%), máscara N95/PPF2S/ou equivalente (62,3%) e avental impermeável (53,8%). Os profissionais de saúde bucal de Ponta Grossa-PR aderiram à maioria das normas de biossegurança no enfrentamento da Covid-19, principalmente no acesso e uso de equipamentos de proteção individual, e menos na realização de procedimentos clínicos com geração de aerossóis.

Effectiveness and patient satisfaction of dental emergencies in Pitié Salpêtrière Hospital, Paris, during the COVID 19 pandemic

Background

A previous study reported the effectiveness and patient satisfaction in the dental emergency unit (DEU) of the Pitie Salpetrière Hospital in Paris before coronavirus disease 2019 (COVID-19). The same methodology was used during the COVID-19 pandemic to compare pain, anxiety, and patient satisfaction during the two periods.

Methods

This prospective study was conducted in 2020 (NCT04354272) on adult patients. Data were collected on day zero (D0) on site and then by phone during the daytime on day one (D1), day three (D3), and day seven (D7). The primary objective was to assess the pain intensity at D1. Secondary objectives were to assess pain intensity at D3 and D7, anxiety intensity at D1, D3, and D7, and patient satisfaction. Patients were evaluated on a 0-10 numeric scale on D1, D3, and D7; mean scores were compared with non-parametric statistics (ANOVA, Dunn’s).

Results

A total of 445 patients were given the opportunity to participate in the study, and 370 patients consented. Seventy-one were lost during follow-up. Ultimately, 299 patients completed all the questionnaires and were included in the analysis. In the final sample (60% men, 40% women, aged 39 ± 14 years), 94% had health insurance. The mean pain scores were: D0, 6.1 ± 0.14; D1, 3.29 ± 0.16; D3, 2.08 ± 0.16; and D7, 1.07 ± 0.35. This indicates a significant decrease of 46%, 67%, and 82% at D1, D3, and D7, respectively, when compared to D0 (P < 0.0001). The mean anxiety scores were D0, 4.7 ± 0.19; D1, 2.6 ± 0.16; D3, 1.9 ± 0.61; and D7, 1.4 ± 0.15. This decrease was significant between D0 and D7 (ANOVA, P < 0.001). Perception of general health improved between D1 and D7. The overall satisfaction was 9.3 ± 0.06.

Conclusion

DEU enabled a significant reduction in pain and anxiety with high overall satisfaction during COVID-19, which was very similar to levels observed pre-COVID-19 pandemic.

Influencing Factors of Mental Health Status of Dentists Under COVID-19 Epidemic

OBJECTIVE

To investigate dentists' psychological status and influencing factors in Shaanxi Province during the COVID-19 epidemic and assess their perceived wellness.

METHODS

The study was conducted among dentists from Shaanxi Province in China. The basic information was collected through the network questionnaire star platform. Depression, Anxiety, and Stress Scales (DASS-42) and Perceived Wellness Survey (PWS) were used to assess subjects' psychological status and perceived wellness. Univariate linear regression analysis and multivariate analysis were performed on the influencing factors of depression, anxiety, and stress, and t-test and analysis of variance were used to analyze the perceived wellness results.

RESULTS

The results demonstrated that 33.2% of the surveyed dentists were in a state of depression, 37.1% were anxious, and 34.4% reported stress among 256 subjects. Linear Regression analysis results showed that: "years of working," "the impact of COVID-19 on their life, work, and sleep," "worrying about occupational exposure/virus infection," "lacking the awareness of prevention and control measures," "overtime work during the epidemic," "worrying about participating in the supporting work," and "continuous exhaustion from work" were significant contributors to depression, anxiety, and stress status. In addition, the results of PWS found that each dimension of PWS was correlated with depression, anxiety, and stress state, which indicates the individual's physical and mental health state was associated with multiple factors.

CONCLUSION

COVID-19 has significantly impacted dentists' mental health in Shaanxi Province. With these findings, we aim to educate and promote targeted interventions that can be utilized to improve dentists' mental health by analyzing the influencing factors.

Psychological consequences of lockdown on dental professionals during the early phase of the COVID-19 pandemic

BACKGROUND

Severe acute respiratory syndrome coronavirus 2, the virus that causes COVID-19, mainly spreads through respiratory droplets. The dental profession is particularly at risk. Routine dental care was suspended after the announcement of the first lockdown in India. This makes the group vulnerable to psychosocial consequences. The present study aims to evaluate the psychosocial issues among dental professionals during COVID-19 pandemic.

MATERIALS AND METHODS

A cross-sectional study was conducted among 627 dental professionals of India, using online Google Forms from April 23, 2020, through April 30, 2020. Participants were evaluated using self-constructed and self-administered personal and professional hardship and fear checklist specifically developed for this study. The 9-item Patient Health Questionnaire (PHQ-9) Depression Scale and 7-item Generalized Anxiety Disorder Scale and PHQ-15 were used to assess the depression, anxiety, and somatic symptoms.

RESULTS

Fear had a remarkable impact on 80.7% of responders. Among the participants, 40.5%, 24.5%, and 30.6% reported symptoms of depression, anxiety, and somatic symptoms, respectively. Somatic symptoms were significantly associated with gender (P = 0.000). Work setting was significantly associated with depression (P = 0.011) and anxiety symptoms (P = 0.001). Concern, worry, and fear due to COVID-19 were significantly associated with depression (P = 0.000), anxiety (P = 0.033), and somatic symptoms (P = 0.009). There was a positive correlation between depression and anxiety symptoms (P = 0.01) and between age and somatic symptoms (P = 0.5).

CONCLUSIONS

This group reported a high level of depression, anxiety, and somatic symptoms. Female dental professionals and private practitioners had more depression, anxiety, and somatic symptoms. Immediate and special intervention is needed for this group. Further exploration into the nature and its effects of the psychological symptoms may be required.

Knowledge and Perceptions Regarding Coronavirus (COVID-19) among Pediatric Dentists during Lockdown Period

AIM

To assess the knowledge and perceptions of COVID-19 among pediatric dentists based on their dependent source of information.

METHODS

A descriptive-analytical cross-sectional survey using a self-administered questionnaire with 23 questions was sent via Google forms to pediatric dentists. All participants were divided into three groups [postgraduate residents (PGs), private practitioners (PP), and faculty (F)]. The comparison of knowledge and perception scores was made based on occupation, source of information, and descriptive statistics used for the analysis using SPSS 21.0 (IBM, Armonk, NY, USA).

RESULTS

A total of 291 pediatric dentists completed the survey, and the majority of them were females (65%). Overall, good mean scores were obtained for knowledge (9.2 ± 1.07) and perceptions (5.6 ± 1.5). The majority of the participants used health authorities (45%) to obtain updates on COVID-19, while social media (35.1%) and both (19.6%) accounted for the next two. A statistically significant difference (p < 0.05) was found among different pediatric dentists groups for relying on the source of information.

CONCLUSION

Overall good pediatric dentists showed sufficient knowledge regarding COVID-19. The pediatric dentists' age, occupation, and source of information influenced knowledge regarding COVID-19, whereas perceptions were influenced by age and gender of the participants. Health authorities successfully educated pediatric dentists than the social media.

Periodontal disease increases the host susceptibility to COVID-19 and its severity: a Mendelian randomization study

Background

Emerging evidence shows that periodontal disease (PD) may increase the risk of Coronavirus disease 2019 (COVID-19) complications. Here, we undertook a two-sample Mendelian randomization (MR) study, and investigated for the first time the possible causal impact of PD on host susceptibility to COVID-19 and its severity.

Methods

Summary statistics of COVID-19 susceptibility and severity were retrieved from the COVID-19 Host Genetics Initiative and used as outcomes. Single nucleotide polymorphisms associated with PD in Genome-wide association study were included as exposure. Inverse-variance weighted (IVW) method was employed as the main approach to analyze the causal relationships between PD and COVID-19. Three additional methods were adopted, allowing the existence of horizontal pleiotropy, including MR-Egger regression, weighted median and weighted mode methods. Comprehensive sensitivity analyses were also conducted for estimating the robustness of the identified associations.

Results

The MR estimates showed that PD was significantly associated with significantly higher susceptibility to COVID-19 using IVW (OR = 1.024, P = 0.017, 95% CI 1.004–1.045) and weighted median method (OR = 1.029, P = 0.024, 95% CI 1.003–1.055). Furthermore, it revealed that PD was significantly linked to COVID-19 severity based on the comparison of hospitalization versus population controls (IVW, OR = 1.025, P = 0.039, 95% CI 1.001–1.049; weighted median, OR = 1.030, P = 0.027, 95% CI 1.003–1.058). No such association was observed in the cohort of highly severe cases confirmed versus those not hospitalized due to COVID-19.

Conclusions

We provide evidence on the possible causality of PD accounting for the susceptibility and severity of COVID-19, highlighting the importance of oral/periodontal healthcare for general wellbeing during the pandemic and beyond.

Knowledge, Attitudes, and Perception of Parents toward Dental Treatment of Children during the COVID-19 Outbreak

This study aimed to evaluate the knowledge of parents regarding the coronavirus outbreak and to assess the change in attitude and perception toward dental treatment during the coronavirus (COVID-19) pandemic. A structured questionnaire (on google format) containing 13 questions was used, and each question had 2 or 3 possible answers. The parents/guardians of children (aged 3–14 years) who were school-going were eligible to participate in this study. A total of 800 parents/guardians were interviewed on google reporting format from June to December 2020. A simple random sampling technique was used to select 800 parents/guardians of children, aged 3–14 years, studying in different schools in Chandigarh. According to the survey, a total of 86% of respondents said that they paid high attention to COVID-19 and explained it to their children; 97% reported that they emphasized the importance of hand hygiene and sanitation during the outbreak; 72% admitted that the outbreak has made them more conscious of the importance of maintaining good oral health and hygiene, to avoid visiting the dentist and 84% felt that the routine dental check-ups and appointments should be avoided during the COVID-19 outbreak; almost half of the respondents (47%) thought that the dental environment was a potential source of infection to their kids; 37% felt getting treatment at a dental setup may expose their child to risks of COVID-19; 71% said they would take their child to a dental department if he/she had a severe toothache. Approximately 46% of the respondents expressed confidence about the preventive measures taken in the dental department to ensure safe treatment for their children. In conclusion, all respondents were concerned about COVID-19 and most of them had talked about it with their children often. In addition, a considerable percentage of them showed apprehensions about the preventive measures being taken at the dental operatory and thought that the dental environment could be more dangerous than other environments.

Impact of COVID-19 on Dentistry

Pandemic situations always impose devastating aftereffects on communities and cause chronic damaging effects on the healthcare system. Novel coronavirus disese-2019 (COVID-19) which has originated in China (Wuhan) is nowadays an emerging threat to public health across the world. It is spreading worldwide so rapidly and has started infecting people in all possible ways. Several dental care facilities in affected countries are completely closed or have been only providing minimal treatment for emergency cases since the whole lockdown has been announced. However, in some affected countries, they are still providing regular dental treatment. This discrepancy could be because of the dearth of proper awareness, knowledge, protocol, or guidelines.

How to cite this article

Kshirsagar MM, Dodamani AS, Deokar RN, et al. Impact of COVID-19 on Dentistry. Int J Clin Pediatr Dent 2021;14(5):711-714.

Pros and Cons of CAD/CAM Technology for Infection Prevention in Dental Settings during COVID-19 Outbreak

The purpose of this commentary is to update the evidence reported in our previous review on the advantages and limitations of computer-aided design/computer-aided manufacturing technology in the promotion of dental business, as well as to guarantee patient and occupational safety. The COVID-19 pandemic led to an unprecedented focus on infection prevention; however, waves of COVID-19 follow one another, asymptomatic cases are nearly impossible to identify by triage in a dental setting, and the effectiveness of long-lasting immune protection through vaccination remains largely unknown. Different national laws and international guidelines (mainly USA-CDC, ECDC) have often brought about dissimilar awareness and operational choices, and in general, there has been very limited attention to this technology. Here, we discuss its advantages and limitations in light of: (a) presence of SARS-CoV-2 in the oral cavity, saliva, and dental biofilm and activation of dormant microbial infections; (b) the prevention of SARS-CoV-2 transmission by aerosol and fomite contamination; (c) the detection of various oral manifestations of COVID-19; (d) specific information for the reprocessing of the scanner tip and the ward from the manufacturers.

Clinical evaluation of antiseptic mouth rinses to reduce salivary load of SARS-CoV-2

Most public health measures to contain the COVID-19 pandemic are based on preventing the pathogen spread, and the use of oral antiseptics has been proposed as a strategy to reduce transmission risk. The aim of this manuscript is to test the efficacy of mouthwashes to reduce salivary viral load in vivo. This is a multi-centre, blinded, parallel-group, placebo-controlled randomised clinical trial that tests the effect of four mouthwashes (cetylpyridinium chloride, chlorhexidine, povidone-iodine and hydrogen peroxide) in SARS-CoV-2 salivary load measured by qPCR at baseline and 30, 60 and 120 min after the mouthrinse. A fifth group of patients used distilled water mouthrinse as a control. Eighty-four participants were recruited and divided into 12–15 per group. There were no statistically significant changes in salivary viral load after the use of the different mouthwashes. Although oral antiseptics have shown virucidal effects in vitro, our data show that salivary viral load in COVID-19 patients was not affected by the tested treatments. This could reflect that those mouthwashes are not effective in vivo, or that viral particles are not infective but viral RNA is still detected by PCR. Viral infectivity studies after the use of mouthwashes are therefore required. (https://clinicaltrials.gov/ct2/show/NCT04707742; Identifier: NCT04707742)

N95 vs Half-face Respirator Wear in Surgical Trainees: Physiologic and Psychological Effects of Prolonged Use

Objectives

As specialists of the upper airway, otolaryngologists are at high risk for COVID-19 transmission. N95 and half-face respirator (HFR) masks are commonly worn, each with advantages in functionality and comfort. In this study, physiologic and psychological parameters of prolonged N95 vs HFR wear were compared.

Study Design

Prospective crossover cohort study.

Setting

Single academic tertiary care hospital.

Methods

A prospective crossover cohort study was performed. Healthy otolaryngology trainees and medical students (N = 23) participated and wore N95 and HFR masks continuously for 3 hours each on separate days. Various measures were analyzed: vitals, spirometry variables, scores on the State-Trait Anxiety Inventory and HIT-6 (Headache Impact Test-6), distress, and "difficulty being understood."

Results

The average age was 26.3 years (SD, 3.42). There were no significant differences in vital signs and spirometry variables between N95 and HFR wear. N95 wear was associated with decreases in oxygen saturation of approximately 1.09% more than with HFRs (95% CI, 0.105-2.077). State-Trait Anxiety Inventory scores increased more with HFR wear when compared with mean changes with N95 wear (95% CI, 1.350-8.741). There were no significant differences in HIT-6 scores or distress levels between masks. The proportions of participants reporting difficulty being understood was significantly higher with HFRs.

Conclusions

Oxygen saturation decreases with prolonged N95 wear, but anxiety and difficulty being understood are greater with HFR wear. Although HFRs have less resistance to gas exchange, N95 respirators may produce less anxiety and distress in clinical situations. Further studies are warranted to evaluate the clinical significance of these differences.

Level of Evidence

2.