COVID-19 as an opportunity for minimally-invasive dentistry: a national cross-sectional survey.

BACKGROUND: During the COVID19 pandemic, the Latvian government issued first absolute restrictions (elective treatments prohibited, only emergency care) and later relative restrictions (preference for non-aerosol-generating procedures (AGP) and emergency care) on dental care. This study aims to assess the impact of these restrictions on the decision made by Latvian dentists about caries treatment. METHODS: A Survey-based cross-sectional study was used. A minimum sample size of 174 dentists was estimated for national representativeness (N = 1524). The questionnaire was developed by experts and sent three times via email to Latvian dentists from July to September 2020 and was also delivered in printed form at two national conferences in September and October 2020. Descriptive statistics were calculated. RESULTS: We received 373 completed questionnaires, with a total response rate of 24.5%. Under the recommendation to reduce AGP for the treatment of uncomplicated caries, 10% of the dentists stated that they would stop attending, 54% would only attend emergencies, and 36% would attend as usual. Under prohibition, the percentages are 15%, 74%, and 11%, respectively. Regarding the type of treatment, more than 75% would opt to proceed with selective caries removal for both primary and permanent teeth and 10% for extraction. CONCLUSION: Latvian dentists are willing to treat patients with caries during the pandemic and state that they prefer to use non- or minimally invasive and less aerosol-generating methods for caries treatment.

Prevalence of white spot lesions and risk factors associated with the COVID-19 pandemic.

BACKGROUND: The objective of this study was to investigate the impact of the COVID-19 pandemic on the prevalence and persistence of white spot lesions (WSLs) among patients treated with traditional braces. METHODS: A group of 434 consecutively finished cases who had pretreatment and post-treatment digital photographs taken were included in this study. Each set of photographs was evaluated by two investigators to determine prepandemic and postlockdown WSLs, in addition to changes in oral hygiene (OH) and other risk factors. RESULTS: There was a statistically significant difference in the development of WSLs pre-COVID-19 lockdown (PRL) versus post-COVID-19 lockdown (POL) (P < 0.001). The overall prevalence for the development of WSLs increased to 52.8% POL. For patients with good pretreatment OH, the risk of developing WSLs POL (42.0%) was two times greater than the rate in PRL (20.1%). For patients whose OH worsened during treatment, 81.2% of POL patients developed WSL compared with 69.6% of PRL patients. The incidence of WSLs was statistically greater in the maxillary anterior region POL than PRL, whereas the incidence in the mandibular anterior region did not reach statistical significance. The distribution of WSLs was greater POL for each tooth irrespective of the arch. CONCLUSIONS: Because of the COVID-19 pandemic, the prevalence of visible WSLs increased from 29.5% to 52.8%. Patients whose hygiene worsened during orthodontic treatment are at an increased risk of developing WSLs.