Background: Surgical mortality data are collected routinely in high-income countries, yet virtually no low-or middle-income countries have outcome surveillance in place. The aim was prospectively to collect worldwide mortality data following emergency abdominal surgery, comparing findings across countries with a low, middle or high Human Development Index (HDI).Methods: This was a prospective, multicentre, cohort study. Self-selected hospitals performing emergency surgery submitted prespecified data for consecutive patients from at least one 2-week interval during July to December 2014. Postoperative mortality was analysed by hierarchical multivariable logistic regression.

Purpose: The purpose of this study was an evaluation of the effect of thermocycling on microhardness and microtensile bond strength (μTBS) of the cross-linked acrylic and nanocomposite teeth to the acrylic denture base. Materials and methods: twelve teeth of the upper denture teeth were selected. Six teeth of nano-hybrid composite resin denture teeth and six cross-linkedacrylic teeth. These teeth, together with theacrylic resin bases, have been fixed to a micro-sawing machine to form 120 microbeam samples. These samples were divided into two storage regimes (dry and thermocycler), forming eight groups, each group containing 15 beams. These 8 groups were divided in equal parts to test the micro-hardness and strength of the micro-tensile bond (4 groups for each test). Results: Paired t-test was used to analyze the effect of aging on micro-hardness and microtensile bond strength for both types of denture teeth. The tests were considered significant when p ≤ 0.05 and highly significant when p ≤ 0.001. Thermocycling procedure decrease the mean values in micro-tensile bond strength for both types of denture teeth brands but with statistical significant difference regarding the cross-linked acrylic one. it produces highly significant decrease in mean values for cross-linked acrylic but has nearly no effect on nanocomposit teeth regarding the microhardness test. Considering denture teeth brand Cross linked acrylic denture teeth showing higher mean values in micro-tensile bond strength before and after aging. Also, it was showing higher mean values in micro-hardness before thermocycling. This condition was totally reversed after aging as nano composite teeth showing higher mean values with significant difference in relation to acrylic one. Conclusion: The newly introduced nanohybrid composite denture teethwere less markedly affected by thermocycling specially in term of hardness,but practically and from financial point of view, the cross-linked acrylic resin teeth has a comparable result to nanocompsite one as it shows higher micro-tensile bond strength (μTBS) so, it appears more applicable for patients.

Examination of the late Cretaceous-early Tertiary succession in Taramsa section, West of Qena, has revealed the presence of latest Maastrichtian fauna and nannofossil flora. The distinct biotic changes at the Cretaceous/Tertiary boundary characterize a profound environmental instability. The gradual replacement of the Cretaceous taxa by Tertiary ones suggests a transitional character of the boundary. The marked change in colour and the observed variation in lithology near the Cretaceous/Tertiary boundary do not indicate, at the present time, whether the sedimentation was contineous or contain a hiatus at the boundary.

No abstract

Purpose: The purpose of this research was to compare between the effect of denture base materials and their processing techniques on palatal denture base adaptation and candidal colonization. Materials and methods: Thirty identical denture bases was constructed by silicon mold which was made from a educational edentulous maxillary cast. Thirty maxillary stone casts were obtained by pouring hard dental stone in the previous silicon mold. Sheets of wax with 2mm thickness, each were adapted to their corresponding stone casts then divided equally into three groups. Group I: Ten maxillary heat cured acrylic resin denture bases processed by long cycle hot water bath curing technique. Group II: ten maxillary acrylic resin denture bases processed by microwave energy. Group III: Ten maxillary monomer free thermoplastic resin denture bases processed by sabelix injecting system. Palatal denture base adaptation and candidal colonization were evaluated. The data was recorded and statistically analyzed. Results: The results of this study showed that statistically there was significant difference in palatal denture base adaptation between the tested groups as(p=0.024). The least mean gap (stone thickness) at the posterior palatal seal area was found in Acrifast denture base resin (G III) followed by GI. The least mean numbers of candidal colonies for the three groups was found in Acrifast denture base resin (G III) followed by GI. Statistically there was highly significant difference of candidal colonization between the three tested groups as(p<0.001). Conclusion: Based on the limits of this study, it could be concluded that injectable monomer free thermoplastic resin denture base material is preferred to minimize candidal colonization, enhance the accuracy of denture base adaptation and increase the opportunity for obtaining successful complete denture.