INTRODUCTION: CAD/CAM denture base materials are milled from pre-polymerized pucks of resin that are highly condensed. So, they provide no polymerization shrinkage eliminating its subsequent disadvantages. This technology offered improved fit, strength properties and more bio-hygienic denture bases compared with conventional processing of the denture base material. OBJECTIVES: The aim of the study was to evaluate the physico-mechanical properties of CAD/CAM denture base material and the effect of thermo-cycling on it compared with the conventional one. MATERIALS AND METHODS: The study was conducted on two parallel groups, divided according to the denture material used. Group (1) conventional PMMA (control group), group (II) CAD/CAM PMMA (study group) of 40 specimens each (16 for impact strength, 16 for flexural strength, 8 for surface roughness and grinded powder form both materials for residual monomer test). Each group was divided into 2 sub-groups: (A) No thermo-cycling and (B) Thermo-cycling, then subjected to 4 different tests, impact strength, flexural strength, surface roughness and residual monomer tests. Data were collected, tabulated and statistically analyzed. Significance level was set at 5%. Bar charts were used for graphical presentations. RESULTS: Our study revealed a highly statistically significant decrease in residual monomer of CAD/CAM PMMA material in both conditions before and after thermo-cycling when compared to conventional PMMA material, which therefore leads to enhanced impact strength and significantly reduced surface roughness after heat treatment. On the other hand, also a highly significant reduction of its flexural strength after thermocycling has been observed. CONCLUSIONS: CAD/CAM dentures with lower amount of methacrylate monomer exhibit more favourable physico-mechanical properties and they have a long-term biocompatibility even with thermal changes making them a more satisfactory as a denture base material for edentulous patients.
Yusra Muftah Saad Elfaidy, Ahmed M. Abdelhamid, Sonia M. Elshabrawy(12-2018)

Background and Objectives: Compliance of community pharmacies with the proper practice of storage and dispensing of medicines is crucial for ensuring the quality and safety of medicines, particularly with the circumstance of recurrent electricity blackout in Libya. This study was aimed to assess the compliance of community pharmacies with the proper practice of drug storage in Tripoli city, Libya. Materials and Methods: A cross-sectional survey conducted in November 2020 targeting a total of 56 community pharmacies in Tripoli, Libya. The questionnaire was adapted from the WHO Checklist for Good Storage Practices and included 41 questions organized under five sections: socio-demographics, pharmacist’s attitude toward the quality of storage practices, queries on environmental storage conditions, the quality of facilities in the community pharmacy, and queries on storage and pharmacy practices. Data were presented as descriptive statistics. Results: Out of the total 56 visited pharmacies, a total of 46 (82.1%) pharmacists participated in the study with one pharmacist being interviewed in every pharmacy. Results showed that 15% of employees reported variety of cleanliness regulatory depending on cutting off running water circumstances in Tripoli and other reasons. About 78.8% participants observed dust in shelves and over the drugs packaging, and 22% of the participant pharmacies’ drugs exposure to direct sunlight. Additionally, 72% of employee experienced high temperatures in the pharmacy during electricity blackouts, whereas only 48% of them experienced humidity. In addition, 91.4% had alternative source of electricity, 44.3% had a power backup connected to the refrigerators. Conclusion: The compliance of majority of the community pharmacies operated in Tripoli is below standard. There is still need to improve the storage practices in the community pharmacies by obeying with the regulatory standards as specified by the Drug Regulatory Authority of Libya.
Ahmed Elbadri M Atia(5-2021)

This study was primarily conducted to investigate the prevalence of imported malaria in a sample of foreign workers (n-1038) in Tripoli during the period from May 2006 to June 2007. A comprehensive review of malaria epidemiology in Libya in the last two decades was also given. All samples were tested serologically using Malaria Rapid Diagnostic test and then examined using blood film technique. Results showed that only 10 samples (1%) were tested positive for both malaria rapid diagnostic test and blood film. Nine of those infected were identified as Plasmodium falciparum and one as Plasmodium vivax. This study confirms that the prevalence of malaria in legal foreign workers is low and the risk of re-introducing or transmitting malaria in the northern areas of the country is remote. It also gives no good reason for including malaria test among those requested for issuing health certificates to foreign workers. The use of malaria Rapid Diagnostic test for malaria detection in this study was proved to be practical and reliable. Although, the situation of imported malaria in Libya imposes no immediate threat to re-emerging of malaria in the country however, continuous surveillance and monitoring particularly to the southern regions and populations have to be taken in a great consideration. An updated new map of malaria vectors distribution in Libya is urgently needed to be able to outline areas of high risk of malaria transmission.
Fadwa Jamaledden Mustafa Kamel Mahanay, Badereddin Bashir K. Annajar(5-2009)