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Article
Effect of casein phosphopeptide-amorphous calcium phosphate on surface roughness of a silorane-based and methacrylate-based composite resin (In vitro comparative study)

Author: Baydaa Hussein بيداء حسين
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 3 Pages: 106-112
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: When using a fluoridated agent for caries-preventive intervention, the clinician should be careful not toallow the agent to come into contact with the composite restorations since topically applied fluorides were found toinduce adverse effects on the morphologic characteristics and composition of composite restorations. A newremineralizing agent "MI Paste" and its fluoridated form "MI Paste Plus" based on Recaldent technology (CPP-ACP)were developed. This study was conducted with the aim of assessing the effect of these new remineralizing agentson surface roughness of two types of composite resin materials.Materials and Method: Cylindrical specimens 12mm in diameter and 2mm in height were prepared from two types ofcomposite resin materials: Filtek™ P90 (a silorane-based composite material) and Filtek™ Z350 XT (a methacrylatebasednanofill composite material). Each specimen was cured against a celluloid strip in a specially designedcylindrical mold using a QTH light curing unit for 40 seconds. Forty specimens were prepared for each compositetype and subdivided into four subgroups of ten specimens each: Subgroup 1: without treatment, dry-stored in anincubator at 37ïC for one week (control subgroup), Subgroup 2: without treatment, stored in deionized water in anincubator at 37ïC for one week, Subgroup 3: treated with MI Paste once daily for one week, and Subgroup 4:treated with MI Paste Plus once daily for one week. Surface roughness of the specimens was obtained with a surfaceprofile testing machine, which used the roughness average (Ra) to assess surface changes. Several measurementswere taken for each specimen and the mean value of these measurements on one specimen was regarded as theRa of that specimen. The mean Ra value of each subgroup was then calculated.Results: The results of this study showed statistically non-significant differences among the different subgroups ofFiltek™ P90 composite resin material. Concerning Filtek™ Z350 XT composite resin material, the results showed astatistically highly significant difference in surface roughness between the subgroup stored in deionized water andthe control one, with statistically non-significant difference between the subgroups treated with MI Paste and MIPaste Plus and the control subgroup. Comparison of significance between the corresponding subgroups of bothcomposite types revealed statistically non-significant differences except for subgroup 2 which showed a statisticallysignificant higher surface roughness in Filtek™ Z350 XT than Filtek™ P90.Conclusions: The daily application of the MI Paste and MI Paste Plus for one week had non significant effect onsurface roughness of the silorane-based composite resin material Filtek™ P90. On the other hand, the application ofthese agents caused surface smoothening of the nanofilled methacrylate-based composite resin material Filtek™Z350 XT.


Article
Effect of tooth brushing technique on oral hygiene in patients with fixed orthodontic appliances

Authors: Dheaa Hussein ضياء حسين --- Baydaa Hussein بيداء حسين --- Manhal Abdul-Rahman منهل عبد الرحمن
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2005 Volume: 17 Issue: 1 Pages: 101-104
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: This study was conducted to find whether the brushing technique (horizontal technique versus roll technique) would affect the oral hygiene of orthodontic patients or not.Materials and methods: This study was conducted on fifteen patients who were undergoing orthodontic treatment and were submitted to the clinical trial by changing the tooth brushing maneuver throughout the orthodontic treatment course from the patient’s own brushing maneuver to the horizontal and then to the roll brushing technique.Results: The results showed that the roll technique had a superior cleansing effect than the horizontal one, and the gender variation had no effect.Conclusion: Patients' instructions are considered as an important factor for planning good oral hygiene.


Article
Dissolution of inorganic phosphorous ion from human enamel treated with different concentration of Siwak aqueous extract in comparison with sodium fluoride

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Abstract

Background: The use of Miswak, chewing sticks (salvadorapersica) can be traced back to Babylonians some 7000years ago. It is commonly used throughout the world especially for the purpose of oral hygiene. Muslims are using asthe religious view. Current study aimed to test the ability of aqueous siwak extract to increase the resistance ofenamel surface against acid dissolution compared to sodium fluoride.Materials and Method: Twenty maxillary first premolars were treated with the selected solutions included twoaqueous siwak extract concentration(5%,10%) and sodium fluoride(0.05%)as control positive for 2 minutes once dailyfor 20days interval, de ionized water was used as control negative. The concentration of the dissolved phosphorusion was measured in etching solution of 2N HCL by flam atomic absorption spectrometer.Result: 10% aqueous siwak extract test solution was registered the lesser release of phosphorusion from etchedenamel surface, then 5% aqueous siwak extract followed by sodium fluoride 0.05%. No significant differencebetween two aqueous siwak extract concentration, while a significant difference was found between mentionedagents and sodium fluoride. De ionized water was recorded a highly significant difference with all test solutions.Conclusion: Aqueous siwak extract effective in increasing the resistance of enamel surface for acid dissolution andshould be use not only for the religious view but also for the benefit of its effects produced


Article
Dissolution of calcium ion from teeth treated with different concentrations of siwak water extract in comparison with sodium fluoride

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Abstract

Background: The miswak is a teeth cleaning twig made from a twig of the Salvadora persica tree (known as arak in Arabic).A traditional alternative to the modern toothbrush, it has a long, well-documented history and is reputed for its medicinal benefits. It also features prominently in Islamic hygienical jurisprudence.Materials and methods: Twenty maxillary first premolars were treated with the selected solutions which included siwak water extract (5%, 10%) and sodium fluoride 0.05% for 2minutes once daily for 20 days interval, deionized water was used as control negative. Then the concentration of the dissolved calcium ion in the etching solution of 2N HCL was measured.Results: The least amount of the dissolved calcium ion was registered for water siwak extract 10%, then sodium fluoride0.05%followed by water siwak extract5%. A significant difference was found between the two concentrations of siwak water extract, while no significant difference was recorded between the mentioned agents and sodium fluoride. There was highly significant difference between deionized water group and other groups except between water and siwak water extract5% the difference was significant.Conclusions: Siwak water extract is successful in improving tooth resistance against caries challenge as it mineralize and harden enamel surface

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