Impact statement There could be a close relationship between periodontal diseases (PDs) severity and Covid-19 infections. This relationship could be caused by Galectin-3-mediated increased immune response and increased viral attachment. Keeping PDs under control and maintaining rigorous oral hygiene during this troubled Covid-19 pandemic period is very important. Patients with older age and pre-existing conditions like cardiovascular disease, hypertension, diabetes, and obesity are in the higher risk group for developing severe Covid-19 infections. The inflammatory pathways that are involved in these conditions are the same pathways that we see in periodontal diseases (PDs). This raises a significant question: Is PD a pre-existing condition that can increase the risk of developing severe Covid-19 infection? Several studies have shown that Galectins play a key role in the homeostasis of immune cells, and recently, a relationship was found between Covid-19 and Galectin-3 (Gal-3).It has been determined that an important area in the spike protein of Coronavirus-19 is almost exactly the same as the morphology of Gal-3, and these spike proteins are critical for the entry of the virus into host cells. We suspect that there is enough evidence to support a close relationship between PDs severity and Covid-19 infections. There is accumulating evidence to suggest a relationship between the severity of PD and the risk of infection with Covid-19, which requires further investigation. This relationship could be caused by Gal-3-mediated increased immune response and increased viral attachment. In this context, we want to emphasize the importance of keeping PD under control by maintaining rigorous oral hygiene during this troubled Covid-19 pandemic period. We would also like to point out the possibility that having PD may be a pre-disposition toward developing a severe Covid-19 infection.

Oral hygiene and gingival health around a restored primary tooth deteriorate with time. Our results suggest that SSC, an open-faced SSC, or a NuSmile(®) pediatric crown should be the preferred crown type for restoring posterior primary teeth.

No abstract

The findings of this study have led to the conclusion that LLLT increases cancer cell proliferation, depending on the power output level of the laser and the number of applications. In addition to the proliferation and mitotic activity of the cancer tissue cells, we concluded that LLLT, which is frequently used in dental practice, could activate precancerous cells or increase existing cancerous tissue.

The fiber-reinforced and nanohybrid composite resin had higher values in the short-post technique, and there was no significant difference between the different fiber posts.