Objective: We aimed to assess the interplay between functional impairment and anxiety, depression, and problematic Internet use levels in front-line healthcare workers who work in inpatient clinics of coronavirus disease-2019 (COVID-19) during the COVID-19 pandemic. Methods: Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI), Internet Addiction Test (IAT), and Sheehan Disability Scale (SDS) were administered to assess the depression, anxiety, problematic Internet use, and functional impairment levels of the participants. Results: Two hundred thirteen participants were enrolled in the present study. Medical doctors showed significantly higher scores of IAT than the nurses and other medical staff (Kruskal–Wallis=6.519, p=0.038). Levels of SDS total are significantly correlated with scores of IAT (r=0.257, p<0.001), BDI (r=0.383, p<0.001), and BAI (r=0.308, p<0.001). All subdomain scores of SDS (social, family, work) and total scores of SDS were significantly and positively correlated with BAI, BDI, and IAT scores (p<0.05). In the separation mediation analysis, problematic Internet use partially mediated the relationship between anxiety-depression and global functional impairment. Conclusion Health politicians should produce policies to develop strategies for coping with consequences of anxiety and depression in healthcare professionals during any health crisis. In addition, we should raise healthcare professionals’ awareness that problematic Internet use is not suitable for dealing with anxiety and depression and may even lead to increase of functional loss.

PURPOSE: The aim of this study was to evaluate occlusal contacts generated by 3 different biogeneric design modes (individual (BI), copy (BC), reference (BR)) of CEREC software and to assess the designs subjectively. MATERIALS AND METHODS: Ten pairs of maxillary and mandibular casts were obtained from full dentate individuals. Gypsum cast contacts were quantified with articulating paper and digital impressions were taken. Then, all ceramic crown preparation was performed on the left first molar teeth and digital impressions of prepared teeth were made. BI, BC, and BR crowns were designed. Occlusal images of designs including occlusal contacts were superimposed on the gypsum cast images and corresponding contacts were determined. Three designs were evaluated by the students. RESULTS: The results of the study revealed that there was significant difference among the number of contacts of gypsum cast and digital models (P<.05). The comparison of the percentage of virtual contacts of three crown designs which were identical to the contacts of original gypsum cast revealed that BI and BR designs showed significantly higher percentages of identical contacts compared with BC design (P<.05). Subjective assessment revealed that students generally found BI designs and BR designs natural regarding naturalness of fissure morphology and cusp shape and cusp tip position. For general occlusal morphology, student groups generally found BI design "too strong" or "perfect", BC design "too weak", and BR design "perfect". CONCLUSION: On a prepared tooth, three different biogeneric design modes of a CAD/CAM software reveals different crown designs regarding occlusal contacts and morphology.
Calcium Sulfate ; Ceramics ; Crowns ; Dental Occlusion ; Dental Prosthesis Design ; Humans ; Molar ; Tooth

PURPOSE: The purpose of the present study was to evaluate the effect of thermocycling and mechanical loading on the biaxial flexural strength and the phase transformation of one Ce-TZP/Al2O3 and two Y-TZP core materials. MATERIALS AND METHODS: Thirty disc-shaped specimens were obtained from each material. The specimens were randomly divided into three groups (control, thermocycled, and mechanically loaded). Thermocycling was subjected in distilled water for 10000 cycles. Mechanical loading was subjected with 200 N loads at a frequency of 2 Hz for 100000 times. The mean biaxial flexural strength and phase transformation of the specimens were tested. The Weibull modulus, characteristic strength, 10%, 5% and 1% probabilities of failure were calculated using the biaxial flexural strength data. RESULTS: The characteristic strengths of Ce-TZP/Al2O3 specimens were significantly higher in all groups compared with the other tested materials (P<.001). Statistical results of X-ray diffraction showed that thermocycling and mechanical loading did not affect the monoclinic phase content of the materials. According to Raman spectroscopy results, at the same point and the same material, mechanical loading significantly affected the phase fraction of all materials (P<.05). CONCLUSION: It was concluded that thermocycling and mechanical loading did not show negative effect on the mean biaxial strength of the tested materials.
Spectrum Analysis, Raman ; Water ; X-Ray Diffraction

PURPOSE: Introducing the relationship between the surgical instruments used in modified radical mastectomy and wound complications is important for preventing and decreasing complications. This prospective randomized trial was designed to assess the impact of scalpel, electrocautery, and ultrasonic dissector usage on wound complications and tissue damage. METHODS: Eighty-two consecutive patients operated with mastectomy were studied. The postoperative time period needed for hemovac drainage, the amount and duration of seroma, infection, flap ecchymosis and necrosis rates were compared. Tumor necrosis factor alpha (TNF-alpha) and interleukin-6 (IL-6) levels in drainage fluids were determined to confirm the inflammatory response and tissue damage. RESULTS: The numbers of patients included in the scalpel, electrocautery and ultrasonic dissector groups were 27, 26, and 29, respectively. The groups were homogenous with respect to age, body mass index, stage, cormorbidities, breast volume and flap area. Operation time and the amount of bleeding were statistically higher in the scalpel group. The incidence of seroma was higher in the electrocautery group and arm mobilization had to be delayed in this group. There were no differences between groups with respect to hematoma, infection, ecchymosis, necrosis, hemovac drainage and the total and first 3 days of seroma volume. TNF-alpha and IL-6 levels were significantly higher in samples obtained from the drains of patients operated with electrocautery. CONCLUSION: Ultrasonic dissector decreases operation time by decreasing the amount of bleeding without increasing the seroma incidence. High cytokine levels in drainage fluids from patients operated with elecrocautery indicates that electrocautery induces more tissue damage and acute inflammatory response. Therefore, seroma, due to acute inflammatory response, was seen more frequently in the electrocautery group. Ultrasonic dissector coagulates protein by breaking hydrogen bonds which may close vascular and lymphatic channels more precisely. But, its actual preventive effect on seroma formation might be related to diminished inflammatory response.
Arm ; Body Mass Index ; Breast ; Drainage ; Ecchymosis ; Electrocoagulation ; Hematoma ; Hemorrhage ; Humans ; Hydrogen ; Incidence ; Interleukin-6 ; Mastectomy ; Mastectomy, Modified Radical ; Necrosis ; Prospective Studies ; Seroma ; Surgical Instruments ; Tumor Necrosis Factor-alpha ; Ultrasonics