Papers by Prof.Dr.Ameer Hamdi H A K E E M Al-Ameedee
This study evaluated the vitro performance of the effect of in-office bleaching (Zoom gel materia... more This study evaluated the vitro performance of the effect of in-office bleaching (Zoom gel material) on the color changes of the one hundred twenty discs specimens, 5 mm in diameter and 2 mm thickness and shade color (A1).these were divided to three groups according to material which prepared from; Beautiful II (B), ISP Empress Direct (E) and Ceram.x.mono composite resins (C), each group's discs specimens were subdivided into four subgroups (n=10), according to the time follow up. All specimens' discs were polished and stored in distilled water at 37°C for one week. These specimens' discs were exposed later to four sessions of in office bleaching. The colorimetric measurements were performed at baseline (before bleaching), 48 hours after bleaching, 3 months and 6 months after bleaching. Data statistically analyzed. Results showed: there were significant effects on the different color parameters L*, a* and b* according to the CIE L* a* b* color system and color change (∆E) on the specimens of the three contemporary composite resins materials.
Background: Oral recurrent bruxism is the most common disease of the oral cavity. The underlying ... more Background: Oral recurrent bruxism is the most common disease of the oral cavity. The underlying etiology remains unclear, and no curative treatment is available. Chlordiazepoxide is essential and useful as anti-anxiety, sedative, appetite-stimulating and weak analgesic actions substance, which recent evidence indicates its involved in emotional responses. Objectives: The present study aimed to use systemic drug such as Chlordiazepoxide oral tablet (5mg). Illnesses related to the oral bruxism by studying its effects in oral recurrent bruxism, this systemic therapy is not indicated in such situation among other drugs. Methods: In this study patients presented with oral recurrent bruxism were treated with Chlordiazepoxide oral tablet (5mg) administered orally once daily after night meal. The dispersible tablet was administered orally once daily for 10 days, 66 participants, 7 were excluded due to incomplete records (51 males and 8 females aged 45.0±6 years) with oral recurrent bruxism, divided into two groups; group A, 30 patients were randomly assigned to receive Chlordiazepoxide oral tablet (5mg) once per day at night, and group B; 29 patients with oral placebo daily for 10 days. Results: The results showed that administering of Chlordiazepoxide oral tablet (5mg) accelerated the healing process within a short time period (10 days) without complications or disfigurement in all patients. Group A, 24 patients, (the healing rate were 0.79%) of 30 patients were used Chlordiazepoxide oral tablet (5mg) doses administered orally had complete healing of oral recurrent bruxism at period time eight days of enzyme-linked immunosorbent assay investigation. Also there will be a decline both in salivary cortisol and salivary alpha-amylase (sAA)levels during the time period of the study, compared with group B, only 6 patients (the healing rate were 0.21%) of 29 placebo-randomized patients. Conclusion: In this study showed that, the Chlordiazepoxide oral tablet treatment was effective in healing the oral recurrent bruxism and the end-points of the study were complete healing and absence of any discomfort pain while eating within a short period of treatment.
E-learning considers the best solution for continuing education during the COVID-19 pandemic, esp... more E-learning considers the best solution for continuing education during the COVID-19 pandemic, especially in tertiary education. The present study aims to analyze and the evaluation efficacy of learning in an e-learning system measures to improve the technical skills among dental and medical undergraduate students during Covid-19 outbreak. One thousand five-hundred students were assigned for this study and the answers for the given questionnaire were collected. The rate of response was 96.86% among respondents who use module and classroom tools, techniques, or platforms. The statistical model was applied to the analysis of the questionnaire. Principle component analysis techniques were used to determine the variables' efficacy on the E-learning model. The reliability of the associated components was measured using (Cronbach's α) test gives 0.801. The findings of this study that medical education skills have been slightly affected by the use of e-learning during the COVID-19 pandemic. Therefore, the idea E-learning entails Familiarity with the technology; Usability, Learned skills, and Competency; Quick Responsiveness; Learning Quality of the learner; Time and Cost; Faster Learning; Information quality; and Knowledge sharing.
Background: Endodontic disease is the result of both the pathogenic effects of the microbes and r... more Background: Endodontic disease is the result of both the pathogenic effects of the microbes and response of the host. The most common species isolated from primary endodontic infections are black pigmented bacteria. These bacteria are obligate anaerobes, non-motile and non-spore forming, which are oxygen sensitive organisms. These organisms are implicated in apical abscess formation due to their proteolytic activity. Prevotella species such as Pr. intermedia have been cultured from 26-40% of infected root canals, suggesting an association with proteolytic activity the isolated bacteria from clinical samples are difficult in growth supplies, it may give flexible effects with obtainable biochemical test, so it is not all the time detected or might be misidentified during the detection. The16SrRNA gene has brought an original instrument for approximating bacterial phylogeny. The Aim of this study was to investigate the presence of Black-Pigmented Bacteria, Pr. Intermedia in Endodontic Infections By Culture Method And Polymerase Chain Reaction (PCR) Analyses; Also Detection Biochemical,Virulence Potential of microbial isolate and examine the antibiotic sensitivity test to isolated bacteria. Methods: The study population contained of thirteen patients, ages ranged from nineteen to fifty five years awarding at the endodontic unit in the Dentistry College of the University of Babylon. Ten isolates (33.3%) of Pr. intermedia were reported as positive by 16SrRNA gene whereas only six isolates (20%) reported positive results by traditional culture and biochemical test. Results: All isolates showed positive results for several virulence factors. Of the selection six antibacterial drugs evaluated against all the Bacterial isolate: amoxicillin, Augmentin and penicillin G were highly effective in terms of maximum diameter of growth inhibition zones. Clindamycin and Erythromycin were found to be moderately effective against the isolated bacteria. Metronidazole was not effective against the bacteria as it did not show any inhibitory activity. Conclusions: The presence of Pr. intermedia suggests that a significant role is played by these organisms in the pathogenesis of Endodontic infections. Furthermore ,PCR provided more frequently detected endodontic Black pigmented bacteria than did culture. All isolates capable to produce biofilm, gingpine and ability to adherence. Based on the study results, amoxicillin-clavulanic acid and amoxicillin were the most potent antibiotics most antimicrobial agents in vitro, against Pr. intermedia isolated from root canal infection, therefore can be used treatment root canal infection.
Background and Aim: Clinical studies concerning the effect of intraoral injection of phentolamine... more Background and Aim: Clinical studies concerning the effect of intraoral injection of phentolamine mesylate on the duration of soft tissue anesthesia and its related functional deficits after using a plain local anesthetic are scarce. This study is to evaluate the efficacy and safety of phentolamine mesylate as a local anesthesia reversal agent after plain mepivacaine using mental/incisive nerve block. Methods: Twenty patients who received plain mepivacaine as a local anesthetic were randomly assigned into two groups: group I (sham injection group) and group II (phentolamine mesylate group). Sham injection or phentolamine mesylate injection were given 30 minutes after mepivavaine injection. Time to return to normal soft tissue sensation and normal oral functions was recorded to assess efficacy of phentolamine mesylate. Intraoral assessment, monitoring hemodynamic vital signs and presence of any drug-related adverse effects were used to assess safety of phentolamine mesylate. Results: there were statistically significant differences (p< 0.001) in the mean duration to recovery of normal sensation in the lower lip, chin and gums between group I and group II. Also there were statistically significant differences (P<0.001) in the mean duration to perceive normal sensation and in the mean duration to demonstrate normal oral functions between the two groups. No statistically significant differences were observed in hemodynamic vital signs between periods of measurements in each group nor between the two groups. No changes were observed on intraoral examination and no drug related adverse events occurred. All patients were satisfied with the rapid recovery of normal sensation and oral functions. Conclusion: Phentolamine mesylate is efficient and safe for rapid recovery of normal sensation and oral functions after using plain mepivacaine.
ASIAN JOURNAL OF CHEMISTRY ASIAN JOURNAL OF CHEMISTRY
In the present study, the physical and chemical analysis effects of the in-office bleaching gel (... more In the present study, the physical and chemical analysis effects of the in-office bleaching gel (H2O2 25 %) on three contemporary restorative composite resins were evaluated by scanning electron microscope (SEM), atomic force microscope (AFM), energy dispersive X-ray spectroscopy (EDAX), Fourier transform infrared spectrometer (FTIR) and Vickers micro hardness taster (HVS). Out of all the tested composite resins in comparison with two follow-up examinations (before bleaching and after one week of bleaching). A total of 300 discus composite resins; Beautifil II, a nano hybrid composite resin (Giomer); IPS Empress Direct, a nano hybrid composite resin (Ceromer); and the Ceram-x-mono, a nano ceramic micro hybrid composite resin (Ormocer); (n = 100 for each group), were selected for an measurements evaluation of before (n = 50 for each group) and after one week of bleaching treatment (n = 50 for each group) by micro hardness tester measurements and chemical analysis using SEM, AFM, EDAX images and FTIR (n = 10 for each test). The Vickers's hardness revealed a significant increase in micro hardness of the Beautifil II and IPS Empress Direct; also the SEM, AFM, EDAX images and FTIR revealed a great diversity in ultrastructure. The results obtained served to validate that the methods employed in this study and were useful in examining and analyzing the physical and chemical changes of bleaching on the composite resins. It was also found that the changes of the arrangement of filler and chemical composition on the composite resins caused by the effect of bleaching had an effect on the chemical and physical properties. Further studies are needed in search of clinical applications that optimally match the differing properties of these materials.
This study evaluated the vitro performance of the effect of in-office bleaching (Zoom gel materia... more This study evaluated the vitro performance of the effect of in-office bleaching (Zoom gel material) on the color changes of the one hundred twenty discs specimens, 5 mm in diameter and 2 mm thickness and shade color (A1).these were divided to three groups according to material which prepared from; Beautifil II (B), ISP Empress Direct (E) and Ceram.x.mono composite resins (C), each group's discs specimens were subdivided into four subgroups (n=10), according to the time follow up. All specimens' discs were polished and stored in distilled water at 37°C for one week. These specimens' discs were exposed later to four sessions of in office bleaching. The colorimetric measurements were performed at baseline (before bleaching), 48 hours after bleaching, 3 months and 6 months after bleaching. Data statistically analyzed. Results showed: there were significant effects on the different color parameters L*, a* and b* according to the CIE L* a* b* color system and color change (∆E) on the specimens of the three contemporary composite resins materials.
In this work, ZnO, and TiO 2 (Hombikat UV 100) and TiO2 doped with 0.5 % of Pt, and Pd metals, th... more In this work, ZnO, and TiO 2 (Hombikat UV 100) and TiO2 doped with 0.5 % of Pt, and Pd metals, that prepared by photo deposition method. The bare TiO 2 and prepared samples were characterized by powder X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (UV-vis DRS), nitrogen adsorption BET, and atomic force microscopy (AFM) were evaluate the effect of photochemical activation by kinds of semiconductors (ZnO, TiO2, Pt/TiO2, and Pd/TiO2) in bleaching gels with UV-light type A, with the purpose of accelerating the process of pigmented component oxidation on Filtek Z350XT resin composite (3M ESPE).The bare catalysts and metal doped prepared where testing by taken twenty-five disc-shaped of the Filtek Z350XT resin composite specimens (3M ESPE) were used in this study, then immersion in tea staining solutions, after that they were randomly divided into five groups specimens (each group n = 10) according to the type of whitening chemical materials treatment applied(ZnO, Pt/TiO 2 , TiO 2 , Pd/TiO2 and TiO2/UV 100). The color measurements were taken: at baseline, after immersion and after chemical treatment procedures by using a stereomicroscope (vita easy shade device). The results recorded, tabulated and statwastically analyses.The results showed the highest mean color difference ∆E values were: group two Pt/TiO2, group three TiO2, group five TiO2 / UV 100, Pd/TiO2 and group one ZnO respectively. However, there was no statistically significant difference in-group three TiO 2. In addition, a whitening effect was demonstrated with group two Pt/TiO 2 and group five TiO 2 / UV 100 showed statistically significant lowest in a* color space compared to others groups. In addition, results show immersion tea staining solutions had a positive influence on the color changes of resin composite.
, in which 90 people participated, including 47 patients suffering from chronic kidney disease an... more , in which 90 people participated, including 47 patients suffering from chronic kidney disease and 43 are healthy. Patient samples were collect, namely saliva. The effect of IL 17 was evident in patients with chronic kidney disease (CKD), as it was highly significant (0.001) compared to those without CKD. Inflammatory Patients with chronic kidney disease frequently experience changes in their oral health, such as periodontitis and other signs of poor oral hygiene (CKD). According to numerous studies, uremic patients have greater rates of periapical and mucosal lesions, loss of attachment, and teeth that are decaying, missing, or filled than the general population. Plaque formation by streptococcus mutans via synthesis specific enzyme Glucosyltransferase enzyme (Gtf) because formation glucan by fermentation of sucrose and this will be provide site of deposition on the surface of teeth and lead to dental caries which leads to the loss of teeth and this was observed in this study in patients with CKD compared to those without CKD it was highly significant (0.001).
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Papers by Prof.Dr.Ameer Hamdi H A K E E M Al-Ameedee