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The objective of this research was to fabricate a composite with an optimum filler level in a bisphenol-A-glycidyldimethacrylate (Bis-GMA) triethylene glycidal dimethacrylate (TEGDMA) resin for bonding of metallic orthodontic brackets to achieve the best handling characteristics with optimum bond strength and without compromising the mechanical properties of the adhesive. One-hundred and sixty extracted human premolars free of any detectable pathology or buccal surface alterations were collected and divided into four groups. In group 1 (control), the teeth were bonded with stainless steel brackets using Transbond XT. In groups 2, 3, and 4, the teeth were bonded with metal brackets using a Bis-GMA/TEGDMA resin with 80, 60, and 20 per cent by weight silane-coated silica of a spherical shape with a mean size of 0.01 μm. Shear bond strength (SBS) of the composites was determined and the adhesive remnant index (ARI) and enamel fracture post-debonding were assessed. According to one-way analysis of variance and Tukey's honestly significant difference (HSD) multiple comparison tests, the SBS of group 4 (10.54 MPa) was considerably less than that of groups 1 (26.1 MPa), 2 (25.5 MPa), and 3 (24.6 MPa). Chi-square analysis revealed that there was an insignificant difference in the incidence of enamel fracture between groups 1 and 2, while a significant difference was present between groups 1 and 2 and 3 and 4. An insignificant difference was also observed in the location of the adhesive failure between the four groups. While all the bonding adhesives tested can be safely used for bonding of brackets, 60 per cent filled Bis-GMA/TEGDMA was superior clinically due to its ease of handling and superior bond strength.

Background: Since the start of January 2020, COVID-19, has been a serious health risk concerning the wellbeing and welfare of people worldwide.  Health care workers are prone to more psychological problems because of their direct contact with infectious patients. Owing to the disruption of educational activities worldwide, stress was common among students. The objective of this study was to determine the psychological impact of COVID-19 pandemic on dental surgeons and dental students. Methods: The survey was conducted at Islamic International Dental Hospital form February 2021 to July 2021. A total of 400 questionnaires were sent to students and dental surgeons, however 340 completely filled questionnaires were returned. Questionnaire using the Depression Anxiety Stress Scale (DASS-21) was used to assess the psychological influence. Data was compiled and independent sample t -test and Pearson’s correlation were applied using the Statistical Package for Social Sciences SPSS version 23 to determine difference of means considering p<0.05 as cut off for significance. Results: The means of stress score, anxiety score and depression were 2.24+0.5, 3.56 +0.06 and 2.83+0.06 respectively. Pearson’s correlation among the dimensions of DAS scale showed that Depression, Anxiety and Stress were positively and significantly correlated with each other. Conclusion: There were high levels of Depression, Anxiety and Stress among dental students during COVID-19 Pandemic.

Objective: To evaluate if the jaw growth patterns are associated with third molar impactions. Design: Cross-sectional study. Study setting: Orthodontics Department, Islamic International Dental College & Hospital Islamabad, Jan to Jun 2018. Methods: We analysed the records of 300 mandibular and maxillary third molars with specific criteria. Orthopantomogram Xrays were used to identify impactions and were classified by Pell and Gregory (P&G) and Winter lines. In addition, lateral cephalograms were assessed for sagittal classes and vertical growth patterns. Results: Angles of impaction (Winter lines) of mandibular M3s were significantly associated with sagittal growth patterns(p=0.021), with most mesioangular impactions found in Classes I and II. High-angle subjects resulted in the highest impactions in the vertical growth patterns. High angle was followed by low angle and normal angle in mandibular M3s and normal angle and low angle in maxillary M3s. Levels of maxillary M3s (P&G) and vertical patterns showed a significant association (p=0.016), with the highest M3s at level C. The maximum number of impacted M3 coexisted with P&G Class- II and level B for both jaws.Conclusion: Significant associations were found between mandibular M3 angles, sagittal patterns, and levels of maxillary M3s and vertical patterns. Results conclude that facial growth patterns and M3 impactions are not completely independent and may help predict impaction status in adolescence and aid in orthodontic treatment.