The COVID-19 pandemic has undoubtedly affected education at all levels, including medical and dental education. Our study aimed to assess the effectiveness of the blended learning in conservative dentistry with endodontics. The students had theoretical classes in a remote form (using the e-learning portal and Teams communicator) and practical classes with the participation of patients in the appropriate sanitary regime. The author’s survey was conducted among fourth-year dental students. The online questionnaire consisted of 5 parts: self-evaluation, evaluation of theoretical e-learning classes, evaluation of practical clinical classes, evaluation of safety, and evaluation of performed blended learning. The majority of respondents declared that their learning effectiveness increased during the pandemic. Most surveyed students preferred remote learning in asynchronous form (e-learning portals) to synchronous form (virtual meetings in real-time). All respondents described the provided personal protective equipment as sufficient or even as excessive. Our students were very satisfied with the proposed blended-learning model and would like to continue it even after the pandemic has ended. Among the advantages, they particularly mentioned the increase in efficiency and the individualised pace of learning, while the disadvantage was the limitation of social contacts. The appropriate use of modern technology can effectively revolutionise dental education.

Saliva as a biological fluid has a remarkable potential in the non-invasive diagnostics of several systemic disorders. Inflammatory bowel diseases are chronic inflammatory disorders of the gastrointestinal tract. This systematic review was designed to answer the question “Are salivary biomarkers reliable for the diagnosis of inflammatory bowel diseases?”. Following the inclusion and exclusion criteria, eleven studies were included (according to PRISMA statement guidelines). Due to their heterogeneity, the potential salivary markers for IBD were divided into four groups: oxidative status markers, inflammatory cytokines, microRNAs and other biomarkers. Active CD patients manifest decreased activity of antioxidants (e.g., glutathione, catalase) and increased lipid peroxidation. Therefore, malondialdehyde seems to be a good diagnostic marker of CD. Moreover, elevated concentrations of proinflammatory cytokines (such as interleukin 1β, interleukin 6 or tumour necrosis factor α) are associated with the activity of IBD. Additionaly, selected miRNAs are altered in saliva (overexpressed miR-101 in CD; overexpressed miR-21, miR-31, miR-142-3p and underexpressed miR-142-5p in UC). Among other salivary biomarkers, exosomal PSMA7, α-amylase and calprotectin are detected. In conclusion, saliva contains several biomarkers which can be used credibly for the early diagnosis and regular monitoring of IBD. However, further investigations are necessary to validate these findings, as well as to identify new reliable salivary biomarkers.

The COVID-19 pandemic has significantly altered existing health care operations, including dentistry. The fear of SARS-CoV-2 infection and the need for increased protection measures have led to a reduction in the number of appointments and the range of performed procedures. Our study aimed to assess the impact of the COVID-19 pandemic (the pre-vaccine period) on the spectrum of performed dental services, with particular emphasis on the change in the proportion of conservative and surgical procedures. The patient base in the University Center of Dentistry and Specialized Medicine (Poznan, Poland) from two periods—pre-pandemic (1 February 2019–31 January 2020) and pandemic (1 February 2020–31 January 2021)—was analyzed. The number of dental services was standardized against the sum of all procedures in a given month. During the COVID-19 pandemic, the number of conservative procedures such as commercial restorations or filled canals has significantly decreased, while the number of surgical procedures has increased. The pandemic has undoubtedly affected the spectrum of dental procedures performed, especially in its acute phase. It is very important to return to performing conservative procedures and educating students in the former range while respecting all safety standards.

Inflammatory bowel diseases (IBD) are chronic disorders that affect the gastrointestinal tract, including the oral cavity. This systematic review was designed to answer the question “Is there a relationship between oral health status and inflammatory bowel diseases?”. Following the inclusion and exclusion criteria, fifteen studies were included (according to PRISMA statement guidelines). Due to their heterogeneity, only six articles about the prevalence of periodontal disease in IBD patients were included in the meta-analysis. Both Crohn’s disease (CD) and ulcerative colitis (UC) patients had an increased odds of periodontitis coincidence compared to the controls, more than 2- and 3-fold, respectively. Moreover, in most studies, patients with IBD were characterized by higher values of caries indices. In conclusion, despite the conducted systematic review, the risk of oral diseases in IBD patients cannot be clearly established due to the possible association of other factors, e.g., sociodemographic or environmental factors.

The COVID-19 pandemic has severely affected the human population by revealing many health problems, including within the oral cavity. This systematic review was designed to answer the question “Is there a relationship between oral manifestations and SARS-CoV-2 infection?” Following the inclusion and exclusion criteria, twenty-seven studies were included (according to PRISMA statement guidelines). Based on the meta-analysis, nearly two-thirds of the SARS-CoV-2 positive patients reported oral symptoms, in particular taste alterations, xerostomia and ulcerations (54.73% [95% CI: 46.28–63.04%], 37.58% [95% CI: 26.35–49.53%], and 21.43% [95% CI: 13.17–31.06%], respectively). In conclusion, despite the conducted systematic review, the increased prevalence of oral manifestations in SARS-CoV-2 infection cannot be clearly established due to the possible association of other factors, e.g., individual or environmental factors.

Tooth erosion is becoming an increasingly common dental problem among teenagers. The study aimed to determine risk factors for erosive lesions in young sports professionals. Participants were 155 students—102 physically active and 53 controls. The method included dental examination (including Basic Erosive Wear Examination) and a questionnaire concerning sports activity, dietary and hygienic habits. The sporting activity significantly correlated with erosive lesions (RSpearman = 0.344). The regression model incorporating the kind of sports activity, special diet and (non-)drinking water was statistically significant (p = 0.922 for the Hosmer–Lemeshow test) and strong enough to predict erosive lesions in young athletes (AUC = 0.758). Water sports professionals were almost 14 times more likely to suffer from erosive lesions than control students. Drinking water as the main beverage decreased the odds by about 70%. The graphical interpretation of multidimensional correspondence analysis confirms the predictive value of these factors. The kind of sports activity adjusted by the main beverage and a special diet was the best variable to predict erosive lesions among teenagers. Early proper diagnosis with defined risk factors leads to better prevention and successful treatment.

The properties of the saliva of patients with inflammatory bowel disease (IBD) are poorly recognized. Likewise, the diagnostic potential of saliva for differentiating various forms of IBD is largely unexplored. Therefore, we compared the concentrations of several parameters in unstimulated whole mixed saliva collected in a standardized manner from patients with active IBD unresponsive to conventional therapy. The samples were received from 27 patients with Crohn’s disease (CD), 24 patients with ulcerative colitis (UC), and 51 healthy individuals. Compared to the controls, the salivary concentrations of S100A8/calprotectin, myeloperoxidase, and IgA were significantly decreased in both CD and UC patients. In addition, patients with UC had decreased levels of TNF-R1 and decreased catalase activity. Interestingly, the concentrations of myeloperoxidase and TNF-R1 showed a high differentiation potential for CD and UC (AUC = 0.690 and 0.672, respectively). All these findings are discussed in the context of host defense in the oral cavity, patients’ prior treatment regimens, and smoking habits.

The study aimed to determine if oral hygiene influences not only oral health but also potentially metabolic disorders such as overweight or obesity. Participants were 94 patients: 40 with increased body mass and 54 with normal body mass. The methods included dental examination, a questionnaire concerning hygienic habits and an assessment of selected salivary inflammatory markers. The new parameter named “cleaning index” (describing the interaction between average time of tooth brushing in minutes and its frequency per day) significantly correlated with Body Mass Index (RSpearman = 0.300). The multivariate regression model incorporating cleaning index, approximal plaque index, receptor 1 for tumor necrosis factor-alpha (TNFα-R1) and interleukin-15 (IL-15) had a high power to predict overweight or obesity (AUC = 0.894). Patients with poor oral hygiene (approximal plaque index >40%) were more than eight times more likely to suffer from obesity than patients with good oral hygiene. Cleaning index higher than 4 decreased the odds by about 85%. Oral hygiene habits, adjusted by salivary concentrations of selected inflammatory markers may allow predicting effectively overweight or obesity risk. Early proper dental prophylaxis and treatment could lead to the better prevention of metabolic disorders.