زينه جهاد ولي ولي

One of the most widely used materials for the fabrication of prosthetic dental parts isacrylic resin. Its reasonable mechanical and physical properties make it a popular material for a widerange of dental applications. Recently, many attempts have been made to improve the mechanicaland biological properties of this material, such as by adding fibres, nanoparticles, and nanotubes.The current study aimed to evaluate the effects of adding an antimicrobial agent, Ag-Zn zeolite,on the surface roughness and hardness of the denture base resins. Ag-Zn zeolite particles werechemically prepared and added at different concentrations (0.50 wt.% and 0.75 wt.%) to the heat cure(HC) and cold cure (CC) acrylic resins. Zeolite particles were characterized and confirmed usingX-ray diffraction (XRD) and Energy-Dispersive X-ray Spectroscopy (EDX) attached with a ScanningElectron Microscope (SEM). Sixty disk shape specimens (40 mm diameter and 2 mm thickness) werefabricated from the HC and CC resins with and without the zeolite. All the specimens were dividedinto two main groups based on the acrylic resins, then each was subdivided into three groups (n = 10)according to the concentration of the Ag-Zn zeolite. A surface roughness and a hardness tester wereused to measure the surface finish and hardness of the specimens. The analysed data showed thatthe surface roughness values significantly decreased when 0.50 wt.% and 0.75 wt.% zeolite wereincorporated in the HC resin specimens compared to the control group. However, this reductionwas not significant in the case of CC resin, while the surface hardness was significantly improvedafter incorporating 0.50 wt.% and 0.75 wt.% zeolite for both the CC and HC resins. IncorporatingAg-Zn zeolite with acrylic resin materials could be beneficial for improving their surface finish andresistance to surface damage as defined by the higher hardness.

This study aimed to evaluate potential impacts of calcium oxide nanoparticles (CaO-NPs) at different dosages on predentin thickness, number of blood vessels, periodontal ligament thickness, and blood glucose level of Wistar rats. Twelve rats were randomly gathered into four groups, untreated (control) and CaO-NP-treated groups at three concentrations (25, 50, and 100 mg/kg of the body weight) over a period of 60 days. Histological investigation was performed on twenty-four lower incisor teeth extracted from all the tested groups under a light microscope, and an automatic Fujifilm was used to measure the blood glucose level. The results showed that regular nanoparticle treatment significantly increased predentin and periodontal ligament thicknesses, a gradual decrease in vascularization in the pulp tissue, and an increase in the blood glucose level as the dosages of nanoparticles administered to the rats increased. Administration of the CaO-NPs at low dosage (25 mg/kg) could be beneficial for the growth and integrity of teeth and dentinal tissues in rats.

The present study was conducted to evaluate the impact of calcium oxide-nanoparticles (CaO-NPs)administration at different concentrations on the epithelial thickness, papilla length and number ofblood vessels of male Wister rats’ buccal mucosa, and the epithelial thickness, filiform length andnumber of blood vessels of the rats’ tongue. Twelve rats were used and randomly allocated into fourgroups: control group (untreated) and the three experimental groups were orally treated with CaO-NPs at different doses 25, 50 and 100 mg/kg of the body weight over two months. On the 61st day, allthe animals were sacrificed, and 1 cm of the buccal mucosa and the body of the tongue were carefullyremoved for histological analysis. Histological tissues were studied under a light microscope toinvestigate the impact of CaO-NPs administration on the oral tissues. An image processing software(Image J) was used to measure the epithelial thickness, papilla length and number of blood vesselsof the rats’ buccal mucosa, and the epithelial thickness, filiform length and number of blood vesselsof the rats’ tongue. The results showed that the CaO nanoparticles administration caused epithelialatrophy and decreased vascularization of buccal and tongue mucosa with all tested doses of CaO-NPsand the 100 mg/kg concentration showed the most significant effect. (PDF) Assessing the Effects of Administering Calcium Oxide Nanoparticles on Oral Mucosa and Tongue of Male Wister Rats. Available from: https://www.researchgate.net/publication/356856102_Assessing_the_Effects_of_Administering_Calcium_Oxide_Nanoparticles_on_Oral_Mucosa_and_Tongue_of_Male_Wister_Rats [accessed Jan 06 2023].

Abstract Dental implants need to support good osseointegration into the surrounding bone for full functionality. Interconnected porous structures have a lower stiffness and larger surface area compared with bulk structures, and therefore are likely to enable better bone-implant fixation. In addition, grading of the porosity may enable large pores for ingrowth on the periphery of an implant and a denser core to maintain mechanical properties. However, given the small diameter of dental implants it is very challenging to achieve gradations in porosity. This paper investigates the use of Selective Laser Melting (SLM) to produce a range of titanium structures with regular and graded porosity using various CAD models. This includes a novel ‘Spider Web’ design and lattices built on a diamond unit cell. Well-formed interconnecting porous structures were successfully developed in a one-step process. Mechanical testing indicated that the compression stiffness of the samples was within the range for cancellous bone tissue. Characterization by scanning electron microscopy (SEM) and X-ray micro-computed tomography (μCT) indicated the designed porosities were well-replicated. The structures supported bone cell growth and deposition of bone extracellular matrix.

Awards: Awarded the Brunton Medal in recognition of high-quality PhD thesis, University of Sheffield, UK 2019.

Enrollment in Teaching activities organized at the University of Sheffield, Sheffield, UK (2015- 2019).  LTS- Sheffield Teaching Assistant (Assessment and Feedback).  LTS- Sheffield Teaching Assistant (Laboratory Group Teaching).  LTS- Sheffield Teaching Assistant (Laboratory Demonstrating).  MAT- Virtual Student Office, RIS- Research Integrity.  Sheffield Teaching Assistant (Problem Solving).

Memberships and Communications: 1. European Society for Biomaterials (ESB), 2017. 2. International Association for Dental Research (IADR), 2018. 3. INSIGNEO Institute for in silico Medicine, University of Sheffield, UK, 2015-2019. 4. Medical Advanced Manufacturing Research Centre, Rotherham ,UK, 2016-2019.

Editor/Reviewer: 1. Editing and reviewing research papers in collaboration with colleagues from the University of Kufa, University of Sheffield, UK and Manchester Metropolitan University, Manchester, UK. 2. Reviewer in different scopus and international Journals such as: Act Biometeiila Journal, Journal of Advances in Materials and Processing Technologies, Journal of Advances in Biology and Biotechnology and Journal of Pharmaceutical Research International.

Conferences: 1. The 1st annual conference of dentistry in college of dentistry / Kufa University (2010). 2. "United Kingdom Society for Biomaterials 15th Annual Conference (UKSB) ‘A comparison of core and non-core based lattices with regular and graded porosity for improved dental implant design’, 30th June-1st July 2016, University of Westminster, UK. 3. The 16th MEIbioeng conference: ‘Porous Titanium for Dental Implant Applications’, 5-6 September 2016, Keble College, Oxford, UK. 4. ORS 2017 Annual Meeting, ‘Titanium (Ti6Al4V) lattices via Selective Laser Melting (SLM) for Dental and Orthopaedic Applications’, March 19-22 at the San Diego Convention Center in San Diego, California, USA. 5. 95th General Session and Exhibition of the International Association for Dental Research (IADR), in conjunction with the 46th Annual Meeting of the American Association for Dental Research (AADR) and the 41st Annual Meeting of the Canadian Association for Dental Research (CADR): ‘Prototype Porous Ti6Al4V via Selective Laser Melting for Dental Implants’, 22-25th March 2017, The Moscone West Convention Center, San Francisco, Calif., USA. 6. 1st Iraqi Student Conference, University of Sheffield. 29 September 2017. 7. In vitro 3D Culture Model for Bone Cell Ingrowth. Biomaterials & Tissue Engineering Group 19th Annual White Rose Work in Progress Meeting, University of Leeds, UK. 18th December 2017. 8. Selective Laser Melted Ti6Al4V with graded porosity for Dental Implants”, 96th General Session and Exhibition of the International Association for Dental Research (IADR). The ExCeL London Convention Center, London, UK. 25-28th July 2018.