This study aimed to investigate the effects of radiotherapy on the mechanical, chemical, and surface properties of two recently introduced restorative dental materials (a glass hybrid and an alkasite), while two conventional restorative materials served as references. Material specimens of the experimental groups (irradiated) were compared to the specimens of the control groups that underwent the same preparation procedure but without irradiation. The experimental groups of restorative material specimens were irradiated with a total of 70 Gy over 35 days (2 Gy/day × 35 days), while the control groups received no treatment. The following properties were evaluated: surface microhardness (Vickers), surface roughness, color change, flexural strength, flexural modulus, material reliability, and infrared spectra. For the experimental groups, measurements were performed 24 h after specimen preparation, i.e., before radiotherapy and after the completion of the irradiation protocol. For the control groups, measurements were performed after the corresponding periods of no treatment. A statistically significant increase in microhardness (p = 0.001–0.004) and surface roughness (p = 0.013) was observed as a result of material aging/maturation in both the control and experimental groups. However, the only statistically significant difference between the control and experimental groups was observed in the discoloration of the conventional reference material (p < 0.001). In conclusion, no statistically significant negative effects of a therapeutic dose of radiotherapy on any of the tested properties of the alkasite and glass hybrid materials were observed, whereas only a minor negative effect of radiotherapy in terms of discoloration was found for a conventional resin composite that was used as a reference material.

Background General anesthesia is a well-documented therapeutic option for the provision of dental treatment, particularly in patients with special healthcare needs and uncooperative pediatric patients. Objectives This retrospective study aimed to analyze the characteristics of dental general anesthesia (DGA) procedures for uncooperative patients of all ages in a tertiary healthcare facility, Clinical Hospital Dubrava, in Zagreb, Croatia. Material and methods The hospital records for the patients treated for various dental reasons under GA were obtained at the Clinical Hospital Dubrava in Zagreb, Croatia. Results Between 2014 and 2019, a total of 810 DGA procedures were performed including 607 patients. The median age was 18 years. Almost half of the patients referred to undergo DGA procedures were from the City of Zagreb and Zagreb County, 27.8% (N=225) and 21.0% (N=170), respectively. More than 90% of patients undergoing DGA procedures were referred with 1 to 3 medical conditions. 47.9% of patients had 1 to 3 dental conditions, of which caries was the most common condition (95.7%). The mean waiting time (±SD) was 113.06 (±62.62) days. 90 patients (14.8%) were referred for dental procedures under GA more than once, accounting for 203 procedures (25.1%). Conclusions DGA remains a single dental treatment option for specific individuals. There is an institutional and, also, an organizational need to address the long waiting times and high repeated DGA rates.