research centers


Search results: Found 5

Listing 1 - 5 of 5
Sort by

Article
Antibacterial Effect of Dentin Bonding Agents: (An in vitro Study)

Author: Mahmoud Y Taha
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 2 Pages: 228-234
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Aims: To evaluate and compare the antibacterial effect of three types of dentin bonding agents. Also, to evaluate the antibacterial effect after different time intervals (24, 48, and 72) hs. Materials and Methods: Materials tested in this study were G bond, Single bond (SB), and Excite bond. Tested mi-croorganisms were Enterococcus faecalis (E. faecalis) and Streptococcus mutans (S. mutans). The antibacterial activity were investigated by agar diffusion test performed with adhesives cured on the surface of dentin discs. Also, the antibacterial effect were investigated by evaluation of growth inhibi-tion after 24, 48, and 72 hrs microplate direct contact test using spectrophotometer. The data were ana-lyzed statistically using one way ANOVA and Tukeyʼs test. Results: G bond had antibacterial effect by the two tests and against the two examined bacteria significantly higher than SB and Excite, also SB significantly had antibacterial effect better than Excite bond. The result also revealed that antibac-terial effect of SB and Excite Bond significantly decreased by the time while G bond was not signifi-cantly decrease. Conclusions: Under the limitation of the present study, it is concluded that G bond is able to delay bacterial growth during restorative treatment of dental caries


Article
The Role of Anticardiolipin and Antiphospholipid Antibodies in Pregnants with Chronic Periodontitis

Authors: Mahmoud Y Taha --- Heba F Hamodat
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 3 Pages: 461-465
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

The aim of the study is to measure immunological and biochemical changes in blood and saliva of pregnant women with history of abortion and having chronic periodontitis. Materials and Methods: The study group consisted of (50) pregnant women at different stages of pregnancy with ages between (17-40) years old with history of one or more consecutive unexplained abortion and having chronic periodontitis, while the control group consisted of (10) pregnant women of comparable age to the study group with no history of any abortion with healthy periodontal conditions. Oral examination and the following parameters were studied: plaque index (PI), periodontal pocket depth index (PPD), bleeding on probing index (BOP), and anticardiolipin value (IgG), antiphospholipid value (IgG), highly sensitivity CRP concentration, and peroxidase enzyme activity were evaluated. Results: The serological and biochemical changes showed that highly levels of ACLA (IgG) and APLA (IgG) in the study group compared to control group. hs- CRP concentration in study and control group was same, peroxidase enzyme activity was elevated in the study group compared to the control group. There was a positive correlation between serum ACLA, peroxidase enzyme activity and periodontal parameters, and also a positive correlation between hs-CRP and PI, while reverse correlation between hs-CRP and PPD and BOP. Conclusion: Detection of high level of anticardiolipin and antiphospholipid in the serum of study group with significant difference compared with control group. High level of hs-CRP found in both study and control group without significant difference. Detection of significantly high level of peroxidase enzyme activity with the study group compared to control group


Article
Evaluation of Antimicrobial Activity of Mineral Trioxide Aggregate (MTA)

Authors: Ennas Y Shehab --- Maha M Al–Bazzaz --- Mahmoud Y Taha
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2009 Volume: 9 Issue: 2 Pages: 216-219
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Aims: To evaluate the antimicrobial activity of MTA against selected microorganisms compared with a
widely used root end filling materials. Materials and methods: Fifteen mm discs of MTA, GIC and
Amalgam were prepared and three types of microorganisms; two bacteria and one fungus, were grown
in 4 ml of brain heart infusion broth for 18 hr. Then 0.5 ml of each growth was spread over selected
media (three plates for each sample) and the discs were applied on the agar, incubated for 24–48 hr and
the zone of inhibition was measured. Results: Amalgam did not demonstrate any antimicrobial activity,
whereas MTA showed antimicrobial effect against all tested microorganisms and was highly significant.
GIC showed antibacterial activity comparable to MTA but failed to produce antifungal effect.
Conclusions: MTA demonstrated antibacterial and antifungal effect, while GIC showed only antibacterial
activity, whereas Amalgam did not show any activity.

Keywords


Article
Rapid Decontamination of Gutta Percha Cones Using Different Chemical Agents

Authors: Mahmoud Y Taha --- Nawal A AL-Sabawi --- Enas Y Shehab
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2010 Volume: 10 Issue: 1 Pages: 30-37
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Aim: To compare the effectiveness of four different disinfectant solutions in rapid decontamination of gutta percha cones. Materials and Methods: In this experimental study, 320 gutta percha cones were placed in bacterial suspensions of Staphylococcus aureus, Escherichia coli, Bacillus subtilis, and Can-dida albicans for 30 minutes, and then immersed in disinfectant solutions (6% hydrogen peroxide, 2% chlorhexidine, 1% sodium hypochlorite, and 70% ethyl alcohol) for 1, 5, 10, and 15 minutes. After that, the cones were aseptically transferred to the test tubes containing 4 ml brain heart infusion broth, and then cultured on selected agar media and number of colonies was estimated after 24 hours incubation at 37 oC. Results: Hydrogen peroxide was effective in 1 minute, while chlorhexidine and sodium hypoch-lorite after 10 minutes, and ethyl alcohol in 5 minutes for decontamination of gutta percha cones. Con-clusion: Hydrogen peroxide was the most effective agents in decontamination of gutta perch cones


Article
Detection of hepatitis B viral markers in saliva and serum chronic carriers in Erbil governorate

Authors: Sazan Mwaffaq Abdulaziz --- Omer Surchi --- Mahmoud Y Taha
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 3 Pages: 228-236
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Introduction: Hepatitis B virus is a serious public health problem worldwide and major cause of acute and chronic hepatitis, cirrhosis and hepatocellular carcinoma. The high resistance of HBV to inactivation and its high concentration in blood and other body fluids such as saliva, semen, vaginal secretion, breast milk and tears accounts for its high infectivity. It has been estimated that dental practitioners are three to five times at a higher risk than the general population through the exposure to the oral secretions and blood of potentially infectious patients. Aims of the Study: The overall aim of this study is to investigate the infectivity of saliva of chronic HBV carriers through detection of HBV antigens and their corresponding antibodies and HBV DNA. Materials and Methods: Serum and saliva samples from 65 confirmed chronic hepatitis B virus (HBV) carriers were examined for the presence of HBV markers using enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR). Results:Out of the 65 chronic HBV carriers, 17(26%) were seropositive for hepatitis B e antigen (HBeAg+) and 48(74%) were seronegative for HBeAg and seropositive for antibody to HBeAg (HBeAg−/anti-HBe+). The detection rates of saliva for HBsAg, anti-HBc, HBeAg and anti-HBe were 55%, 65%, 53% and 100%, respectively, to that of serum. The detection rates of HBV DNA for serum and saliva were 90% and 60%, respectively. Conclusions: Based on these results we have arrived at the conclusion that saliva of these carriers might be potentially infectious

Keywords

HBs Ag --- saliva --- serum --- chronic carrier

Listing 1 - 5 of 5
Sort by
Narrow your search

Resource type

article (5)


Language

English (5)


Year
From To Submit

2013 (2)

2011 (1)

2010 (1)

2009 (1)