Resin composites have been widely used in dental restoration. However, polymerization shrinkage and resultant bacterial microleakage are major limitations that may lead to secondary caries. To overcome this, a new type of antibacterial resin composite containing ciprofloxacin-loaded silver nanoparticles (CIP-AgNPs) were synthesized. The chemical reduction approach successfully produced CIP-AgNPs, as demonstrated by FTIR, zeta potential, scanning electron microscopy, and ultraviolet-visible (UV-vis) spectroscopy. CIP-AgNPs were added to resin composites and the antibacterial activity of the dental composite discs were realized against Enterococcus faecalis, Streptococcus mutans, and the Saliva microcosm. The biocompatibility of modified resin composites was assessed and mechanical testing of modified dental composites was also performed. The results indicated that the antibacterial activity and compressive strength of resin composites containing CIP-AgNPs were enhanced compared to the control group. They were also biocompatible when compared to resin composites containing AgNPs. In short, these results established strong ground application for CIP-AgNP-modified dental composite resins.

Antibacterial restorative materials against caries-causing bacteria are highly preferred among high-risk patients, such as the elderly, and patients with metabolic diseases such as diabetes. This study aimed to enhance the antibacterial potential of resin composite with Magnesium-doped Zinc oxide (Mg-doped ZnO) nanoparticles (NPs) and to look for their effectiveness in the alloxan-induced diabetic model. Hexagonal Mg-doped ZnO NPs (22.3 nm diameter) were synthesized by co-precipitation method and characterized through ultraviolet-visible (UV-Vis), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) analysis. The Mg-doped ZnO NPs (1, 2.5 and 5% w/w) were then evaluated for antibacterial activity using a closed system in vitro biofilm model. Significant enhancement in the antibacterial properties was observed in composites with 1% Mg-doped ZnO compared to composites with bare ZnO reinforced NPs (Streptococcus mutans, p = 0.0005; Enterococcus faecalis, p = 0.0074, Saliva microcosm, p < 0.0001; Diabetic Saliva microcosm, p < 0.0001). At 1–2.5% Mg-doped ZnO NPs concentration, compressive strength and biocompatibility of composites were not affected. The pH buffering effect was also achieved at these concentrations, hence not allowing optimal conditions for the anaerobic bacteria to grow. Furthermore, composites with Mg-doped ZnO prevented secondary caries formation in the secondary caries model of alloxan-induced diabetes. Therefore, Mg-doped ZnO NPs are highly recommended as an antibacterial agent for resin composites to avoid biofilm and subsequent secondary caries formation in high-risk patients.

Biofilm formation in the resin-composite interface is a major challenge for resin-based dental composites. Using doped z nanoparticles (NPs) to enhance the antibacterial properties of resin composites can be an effective approach to prevent this. The present study focused on the effectiveness of Selenium-doped ZnO (Se/ZnO) NPs as an antibacterial nanofiller in resin composites and their impact on their mechanical properties. Pristine and Se/ZnO NPs were synthesized by the mechanochemical method and confirmed through UV-Vis Spectroscopy, FTIR (Fourier Transform Infrared) analysis, X-ray Diffraction (XRD) crystallography, Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), and Zeta analysis. The resin composites were then modified by varying concentrations of pristine and Se/ZnO NPs. A single species (S. mutans and E. faecalis) and a saliva microcosm model were utilized for antibacterial analysis. Hemolytic assay and compressive strength tests were also performed to test the modified composite resin’s cytotoxicity and mechanical strength. When incorporated into composite resin, 1% Se/ZnO NPs showed higher antibacterial activity, biocompatibility, and higher mechanical strength when compared to composites with 1% ZnO NPs. The Se/ZnO NPs has been explored for the first time as an efficient antibacterial nanofiller for resin composites and showed effectiveness at lower concentrations, and hence can be an effective candidate in preventing secondary caries by limiting biofilm formation.

This study explores the effects of thermal and magnetohydrodynamics (MHD) on Powell–Eyring fluid with the Cattaneo–Christov heat flux over a curved surface. The mathematical framework regarding the physical problem turn out to a set of nonlinear partial differential equation. The set of governing equations are first reduced into nonlinear ordinary differential equations via appropriate transformations and then analytical solutions of resulting nonlinear differential equations have been obtained by optimal homotopy asymptotic method. The influence of involved parameters such as magnetic parameter, fluid parameter, thermal relaxation parameter, curvature parameter, relaxation parameter, Grashof number, material parameter and Prandtl number are discussed and analyzed in tabular as well as in pictorial form. Finally, a comparison with the existing literature is prepared and an excellent agreement is seen.

Background: Direct consequence of microbes developing resistance against antibiotics is prolonged hospitalization, increased treatment cost and duration. Increased duration of hospitalization causes prolonged use antibiotics which results towards side effects. Primary Study Objective: The purpose of antibiotics use is either to kill the microbes (bactericidal) or slows down their growth (bacteriostatic). Irrational use of antibiotics makes them does their exact opposite. Instead of killing microbes or slowing down their growth, it allows microbes to develop resistance against antibiotics. Methods/Design: An observational concurrent study was performed in which data was collected. Individuals were interviewed using structured questionnaire. Percentage of rationality and irrationality of antibiotics use was observed. Additionally, percentage of prescribed class of antibiotics was also observed in patients.

Background: Osteoarthritis is a disorder of joints that most often influences the knee, spine, hip, and small hands joints. It is one of the common types of arthritis. It can lead to reduced mobility in elder patients. Primary objective: The aim of the project is to evaluate the current etiology, pathogenesis, investigations, and management of osteoarthritis. Methods/Design: The history of patients suffering from osteoarthritis was collected on a designed questionnaire which includes age, gender, job status, duration of disease, weight, pain, and current medical history. Setting: Data was taken from different people in the community Participants: Data from 50 patients were taken. Intervention: This work will discuss the challenges of developing good quality outcome measures for use in large-scale multicenter clinical trials for new osteoarthritis treatments, especially disease-modifying osteoarthritis drugs. Primary Outcome Measures: The data evaluation showed that this disease is most common in women than men having a weight greater than 50kg. Results: Most persons suffering from this disease were unemployed and had limited physical activities, and the maximum had complaints of knee pain and shoulder pain. A few patients complained of neck, elbow, feet, and backbone pain. Most were suffering from other concomitant diseases along with osteoarthritis, and a few were diagnosed with osteoarthritis only. Conclusion: This study clearly showed the prime factors involved in osteoarthritis which may help the community to avoid those factors to increase the quality of life.

Primary Study Objective: Purpose of the study was to assess to risk factors of diabetes type II and complications in diabetic patient of tertiary care hospital. Methods/Design: Cross sectional study conducted to evaluate the risk factors associated with diabetes Mellitus. Setting: Tertiary hospitals of Islamabad and Azad Kashmir was selected for the current study. Participants: 50 patients assessed without any gender discrimination age between 35 to 85 years for risk factors and complications. Intervention: Data was collected from patients that were bed ridden admitted in hospitals. A total of 50 patients were included in this study with age limit more than 35 years and without any discrimination of gender. Primary Outcome Measures: In tertiary care hospitalized patient's obesity, inactivity and family history were the major risk factor for diabetes mellitus type 2 and we calculated the obesity, inactivity and family history percentage in diabetic patients 63%, 49% and 67% respectively. Results: Percentage of risk factors calculated the obesity, inactivity and family history in diabetic patients 63%, 49% and 67% respectively. Macro vascular complications in patients with diabetes mellitus type 2 were stroke 3%, angina 8%, hypertension and cognitive impairment have highest percentages i.e., 78%. 46% patients were suffering from ulceration; gangrene and amputation have percentages 19% and 3% respectively. Patients with microvascular complications of diabetic nephropathy were assessed for their albuminuria 25%, edema 32% and incontinence 28%. Conclusion: These complications can be avoided if patients of DM type 2 adopt a healthy lifestyle, do exercise and monitor their blood glucose levels regularly. Patients should also control their blood pressure to avoid damage to their microvasculature.

Objective: To develop a framework for infection control in the spectrum of dental procedures during the COVID-19 pandemic. Methodology: The study was conducted from Oct to Dec 2021 after approval for ethical review board of Foundation university college of dentistry Ref no (    ). Patients undergoing various dental procedures were enrolled after written and verbal informed consent. Risk Stratification of each procedure was done applying novel risk assessment scoring system, according to the level of risk contact with saliva was given score 1, contact with blood scored as 2, production of aerosol (low level) through triple syringe was given score 3, high aerosol production by ultrasonic piezoelectric instruments was scored as 4. If the complete duration of the dental procedure was >60 min score assigned was 0.75, for procedures with 30 to 60 mins duration score specified was 0.50, if the duration of the procedure was less than 30 min score for that procedure was 0.25. For each patient total score of all these parameters was accumulated to grade risk of SARS -CoV-2 transmission as low (score <4), medium (score 4 to 6), or high (score >6) depending upon the accumulative score of each procedure. Results: Nine hundred and fifteen patients with a gender distribution of 163 (17.9%) males and 748 (82.1%) females with an age range < 18 – 45 years undergoing the dental procedure were enrolled. Out of 915, 436 (47.6%) procedures were found to be low risk, 38 (4.1%) moderate risk, and 437 (47.7%) high risk. Out of 174 maxillofacial procedures, only 18 (10.3%) were of high risk, similarly out of 113 orthodontics procedures, only 1 (0.9%) was of high risk and for 147 prosthodontic procedures, there were 55 (37.4%) high-risk procedures. On the other hand, for operative dentistry procedures (n=181), majority of 128 (70.7%) posed a high risk, among pediatrics procedures (n=92) there were 62 (67.4%) high-risk procedures and for periodontics (n=204) about 173 (84.8%) were of high-risk nature. Therefore, the majority of the high-risk procedures belonged to operative, pediatrics, and periodontics specialty as compared to other specialties (p<0.001). Conclusion: The majority of the high-risk dental procedures belonged to operative, pediatrics, and periodontics specialty as compared to other specialties.