The purpose of this study was to investigate the prevalence and configuration of Middle Mesial Canals (MMC) and isthmi in mandibular molars in Pakistani population using Cone Beam Computed Tomography (CBCT). METHODOLOGY: Sixty CBCTs of patients were selected randomly from database of University College of Dentistry, Lahore. First and second permanent mandibular molars without evidence of previous endodontic treatment, full coverage restoration or root resorption were evaluated for the number of roots, canals and the presence and configuration of MMC and isthmi. The age and gender of patients were also recorded. SPSS was used for statistical analysis using chi-square test. Significance level was set at 5% (P < 0.05). RESULTS: Out of 189 mandibular molars, MMCs were found in 9 and isthmi in 62 teeth. No statistical association was found between the presence of MMC and age, gender, side or tooth type. Significantly more isthmi were found in second molars, females and younger patients, P < 0.05. CONCLUSION: MMC and isthmi in mesial roots of mandibular molars are not unusual findings in our population and CBCT can be a valuable tool for their detection.

A comparative study of hydrolysis of PET waste has been carried out under various reaction conditions. PET was hydrolyzed with sodium hydroxide in different solvents at reflux as well as by fusion in solventless conditions at atmospheric pressure. Best results were obtained when PET chips were heated to dryness with sodium hydroxide in minimum amount of water. A 98% yield of terephthalic acid was obtained in ten minutes. Hydrolysis with aqueous ammonia was not promising. Acid hydrolysis with nitric acid also provided 97% yield of the terephthalic acid. The basic hydrolysis of the PET waste (in a minimum amount of water) is being recommended as preferred method for the formation of terephthalic acid.

Hexanary high-entropy oxides (HEOs) were synthesized through the mechanochemical sol-gel method for electrocatalytic water oxidation reaction (WOR). As-synthesized catalysts were subjected to characterization, including X-ray diffraction (XRD), Fourier transforms infrared (FTIR) analysis, and scanning electron microscopy (SEM). All the oxide systems exhibited sharp diffraction peaks in XRD patterns indicating the defined crystal structure. Strong absorption between 400–700 cm−1 in FTIR indicated the formation of metal-oxide bonds in all HEO systems. WOR was investigated via cyclic voltammetry using HEOs as electrode platforms, 1M KOH as the basic medium, and 1M methanol (CH3OH) as the facilitator. Voltammetric profiles for both equiatomic (EHEOs) and non-equiatomic (NEHEOs) were investigated, and NEHEOs exhibited the maximum current output for WOR. Moreover, methanol addition improved the current profiles, thus leading to the electrode utility in direct methanol fuel cells as a sequential increase in methanol concentration from 1M to 2M enhanced the OER current density from 61.4 to 94.3 mA cm−2 using NEHEO. The NEHEOs comprising a greater percentage of Al, ([Al0.35(Mg, Fe, Cu, Ni, Co)0.65]3O4) displayed high WOR catalytic performance with the maximum diffusion coefficient, D° (10.90 cm2 s−1) and heterogeneous rate constant, k° (7.98 cm s−1) values. These primary findings from the EC processes for WOR provide the foundation for their applications in high-energy devices. Conclusively, HEOs are proven as novel and efficient catalytic platforms for electrochemical water oxidation.

Objective: To assess the suboptimal health status among young adults and its association with their demographic factors visiting institute of dentistry CMH, Lahore Design of the Study: It was a cross-sectional study. Study Settings: This study was carried out at Outpatient Department of Dentistry Combined Military Hospital, Lahore from August 2020 to January 2021. Material and Methods: A cross-sectional study was carried out with sample of 384 young adults visiting institute of dentistry CMH, Lahore. Suboptimal health status was using the “Suboptimal Health Mesurement Scale” ver-1.0. Information of demographics and information related to affecting to lifestyle behaviors were evaluated with a questionnaire. The associations between demographic information, lifestyle behaviors were checked by applying a Pearson coefficient Chi-square test. Results of the Study: A total of 384 participants were included in this study. The mean age of the participants was a 27.79±5.23 year with 53.2 % being women. Age group 19-28 years had high sub-optimal health 51.7% (199), while participants falling in age category 29-39 years had low sub-optimal health 48.3% (186). There was a strong association between the two independent variables. Pearson chi square (1) = 4.152, p value 0.0. Conclusion: It was found that suboptimal health status was significantly associated with demographics of young adults, environmental factors and life style behaviors in both males and females. Keywords: Suboptimal health status, demographic factors, demographic factors scale, young adults

Objective: The present study aimed to evaluate the level of perceived stress is associated with self-reported halitosis among undergraduate dental students in Pakistan Method: The crossectional study based on survey design was directed to evaluate the association of level of perceived stress and halitosis among undergraduate dental students. Sample size of the study was 278 undergraduate dental students from private dental colleges of Lahore. Independent sample t test was used. Results: The results of independent sample t test revealed a significant difference of level of perceived stress between the undergraduate dental students with halitosis and without halitosis (t=-21.784, P=.000). Undergraduate dental students who don’t have reported halitosis have lower level of perceived stress (Mean±SD, 11.76±3.01) as compared to those students who reported halitosis (Mean±SD, 22.13±4.32) Conclusion: Higher prevalence of halitosis was found among dental students with moderate perceived stress Keywords: Halitosis, Dental students, Perceived stress