Assessing Knowledge, Attitudes and Practices of dental practitioners regarding the COVID-19 pandemic: A multinational study.

BACKGROUND: Coronavirus Disease 2019 (COVID-19) has been declared a global public health emergency that is affecting people across the globe. OBJECTIVES: The aim of this study was to assess the Knowledge, Attitudes and Practices (KAP) of dental practitioners regarding the Coronavirus Disease 2019 (COVID-2019) pandemic. MATERIAL AND METHODS: An online questionnaire was distributed among dentists across the globe using a combination of convenience and snowball sampling. The questionnaire was divided into 4 sections: the 1st one contained personal information, whereas the 2nd, 3rd and 4th sections assessed knowledge (11 questions), attitudes (6 questions) and practices (7 questions) of the dentists. The data was subjected to the Shapiro-Wilk test, one-way analysis of variance (ANOVA), multivariate linear regression, and Pearson's correlation; 95% confidence interval (CI) was calculated and odds ratio (OR) was obtained. The analysis was done using IBM SPSS for Windows, v. 21.0. RESULTS: The total number of the responses received (860) was divided with regard to various continents (Asia, Americas - North and South, Europe, Africa, and other - Australia and Antarctica). The largest number of dentists came from the Asian continent (264; 30.7%). Most dentists had a degree of MDS (Master of Dental Science) (301; 35.0%), followed by BDS (Bachelor of Dental Surgery) (282; 32.8%) and DDS (Doctor of Dental Surgery) (226; 26.3%). High/Good knowledge and practice scores were observed among 92.7% and 79.5 % of the dentists, respectively. Good knowledge scores were significantly associated with qualifications (p = 0.04) and years of practice (p = 0.02); good practice scores were associated with qualifications only (p = 0.03). CONCLUSIONS: The dentists were found to have good knowledge and practice scores, which is important to combat COVID-19. They are advised to follow the Centers of Disease Control and Prevention (CDC) and World Health Organization (WHO) guidelines in their clinics, and sensitize their staff so that no stone is left unturned in defeating this pandemic.

Assessment of Coronal Leakage of Temporary Restorations in Root Canal-treated Teeth: An in vitro Study.

INTRODUCTION: Coronal leakage is one of the constant concerns in routine dental practice. It is one of the factors responsible for the failure of root canal therapy. Permanent restorations should be given as soon as possible after the completion of root canal therapy. If unavoidable, provisional restoration should be given in such a way that it maximally reduced the leakage of microorganisms and fluids from the external environment into the canal space. Hence, we evaluated the effect of saliva on the coronal leakage of temporary restorations. MATERIALS AND METHODS: Biomechanical preparation of the root canals of 204 fresh mandibular first premolar teeth was done using endodontic files with intermittent irrigation of sodium hypochlorite solution and ethylenediaminetetraacetic acid. Alternate irrigation with normal saline was done periodically. After preparation, drying of the canals was done using paper points followed by sealing of the apical foramen. For the assessment of the microleakage, Siqueira et al apparatus and method was used. All the specimens were divided into four groups based on the provisional restorative material used. All the groups were further divided into three subgroups based on the presence and absence of intracanal medicaments. Verissimo et al's criteria were used to check the turbidity at 1-, 2-, 3-, and 4-week interval respectively. All the results were analyzed by Statistical Package for the Social Sciences (SPSS) software. Chi-square test was used to measure the level of significance, and p < 0.05 was considered to be significant. RESULTS: In group I, all the subgroups' specimens showed significant difference at 1 week's time. Only the subgroup with no intracanal medicaments in Cavit-containing provisional restoration showed nonsignificant alterations. Statistically significant alterations were seen at 1, 2, and 3 weeks' interval in all the subgroups except for one with intracanal medicaments. CONCLUSION: All the temporary restorative materials were not able to prevent microleakage after 1 week's time, with worst bacterial resistance shown by Ketac Molar and ionomer restorative material. Future studies are advocated for better prognosis of root canal therapy.