research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
The effect of plasma on transverse strength, surface roughness and Candida adhesion of two types of acrylic denture base materials (Heat cure and light cure)

Authors: Raghdaa K. Jassim رغداء جاسم --- Aliaa Kh. Awad علياء عواد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: special issue 2 Pages: 10-17
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: Dental polymers have a great use in dental applications such as denture, temporary crowns….etc; thisis due to their superior physical and chemical characteristics. At the same time some of these properties impose alimitation on applications in several new and high technology areas. Plasma treatment is one of the most widely usedsurface treatment techniques in which the composition and structure of a few molecular layers at or near thesurface of the polymer are modified. The aims of this study were to evaluate the effect of plasma treatment by argongas on transverse strength; surface roughness and Candida adherence to heat cure and light cure acrylic denturebase materials. Also compare the effect of plasma treatment on heat and light cure denture base materials.Materials and methods: A total number of 180 specimens were prepared in this study; they were divided into twomain groups according to the type of the material used (heat cure acrylic resin and light cure acrylic resin). Eachmain group was subdivided into three subdivisions according to the type of the test used (transverse strength,surface roughness and Candida adherence), for each test 30 samples were divided into three groups according tothe time of plasma treatment that were applied (control, 5 and 10 minutes). Plasma treatment process wasperformed for all the studied groups in two different periods (5 and 10 minutes) except for control group no plasmatreatment were performed.Results: Plasma treatment of heat cured acrylic specimens revealed a decrease in the transverse strength of thestudied groups for 5 and 10 minutes. Similar results were obtained for light cure denture base material after treatmentwith argon gas plasma for the same periods of time used for heat cure. Plasma treatment of heat cure and light cureacrylic specimens showed decrease in surface roughness and Candida adherence for (5min and 10min).Thecorrelation between surface roughness and Candida adherence in the present study showed a weak correlation forall tested groups for both types of materials except for 5 minutes plasma treated heat cure acrylic specimens whichwere moderate. Statistically, there was no significant difference between surface roughness and Candida adhesionfor all groups of both types of materials except for 5min group of heat cure acrylic specimens.Conclusion: Within the limitation of this study it can be concluded that argon plasma treatment to the surface ofheat and light cure denture base materials can cause a decrease in transverse strength, surface roughness andCandida adherence for 5 and 10min treatment times


Article
The influence of argon gas flow in the killing of staphylococcus epidermidis bacteria
تأثير تدفق غاز الأرجون على نسبة قتل بكتيريا Staphylococcus epidermidis

Loading...
Loading...
Abstract

In this research, non-thermal plasma system of argon gas is designed to work at normal atmospheric pressure and suitable for work in medical and biotechnological applications. This technique is applied in the treatment of the Staphylococcus epidermidis bacteria and show the role of the flow rate of Argon gas on the killing rate of bacteria, and it obtained a 100 % killing rate during the time of 5 minutes at the flow Argon gas of 5 liters/ min.

في هذا البحث، تم تصميم منظومة البلازما غير الحرارية تعمل بغاز الأركون عند الضغط الجوي الاعتيادي ومناسبة للتطبيقات الطبية والبايوتكنولوجية. حيث تم تطبيق هذه التقنية في معالجة بكتيريا ستافلوكوكاس ابديرمدس وتبيين دور معدل تدفق غاز الأرجون على معدل قتل البكتيريا، وحصلنا على معدل قتل بنسبة 100٪ خلال زمن 5 دقائق عند تدفق 5 لتر/ الدقيقة.

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2018 (1)

2012 (1)