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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


Article
Clinical evaluation of resin - bonded bridges

Authors: Sabah A ISMAIL --- Abdul-haq A SULIMAN --- Ma,an M NAYEF
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 1 Pages: 35-39
Publisher: Mosul University جامعة الموصل

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Abstract

This study evaluated resin-bonded fixed partial dentures (FPDs) clinically. Forty patients received 40 resin-bonded FPDs. Two types of luting materials were used, Super Bond Crown and Bridge Material and Degufill SC composite.The metal frame works for Super Bond Crown and Bridge Material were sandblasted only, and for Degufill SC composite were electrolytically etched, Clinical evaluation were performed at 3, 6, 12 and 24 months after cementation. None of the prostheses bonded by Super Bond Crown and Bridge Material lost retention, whereas two of the acid etched retainers required replacement after one year, Resin bonded prostheses appear to be favorable alternative to other types of fixed partial dentures.


Article
The effect of bleaching on shear bond strength of resin bonded bridges

Author: Sabah A ISMAIL
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 3 Pages: S291-S298
Publisher: Mosul University جامعة الموصل

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Abstract

Sixty intact upper central and lateral incisors were used in this study the teeth were divided into four groups, the first group was the control group the other groups were bleached with (10%)carbamide peroxide (Opalescence 10%) for two weeks the bleaching material was changed every (8) hours. Sixty discs shaped samples were cast from nickle chromium CB Blando 72 alloy the diameter of each sample was (5) mm and the thickness was (1) mm, the bonding surfaces were sandblasted. The discs were bonded to the teeth in the first and second groups one day after bleaching, the third group was bonded one week after bleaching while the fourth group was bonded two weeks after bleaching. The bonding material used for all groups was Super Bond Crown and Bridge Material. The shear bond strength of the samples was tested. The statistical analysis showed that the second group has the lowest bond strength while the fourth group showed the highest bond strength. This indicates that bleaching affects the bond strength of resin bonded bridges fabricated from CB Blando 72 nickel chromium alloy so that bridges must be fabricated at least two weeks after bleaching.


Article
Clinical assessment of stainless steel brackets failure rate after reduction of phosphoric acid concentration and etching time

Author: Ali R AL-KHATIB
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 3 Pages: S353-S362
Publisher: Mosul University جامعة الموصل

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Abstract

The purpose of this study was to evaluate clinically the effect of reduction of phosphoric acid concentration and etching time during bonding procedure of stainless steel brackets. As (240) metal mesh-backed brackets were bonded by using no-mix adhesive orthodontic composite, they were divided into (3) equal groups, each of (80) bracket (10 patients), the labial and buccal Surfaces of the first group was conditioned with (37%) phosphoric acid for (45) seconds, the second with (20%) for (10) seconds, and the third group was conditioned with (5%) for (15) seconds, all patients were received the orthodontic treatment by the same operator, the study period was (1) year of, the results indicate that the percentage of failure rate for the second and third groups did not significantly differ from the first group, this was calculated by using the Z-test of two proportions at (p<0.05). However, the evaluation of the adhesive remnant index (ARI) after bracket failure, revealed that the application of (37%) acid for (45) second resulted in higher amount residual adhesive left on the teeth The present study demonstrated that phosphoric acid concentration of (5%) for (15) seconds could be sufficient for bracket bonding on anterior or premolar teeth.


Article
Dissolution of Calcium Ion from Human Enamel Treated With Zamzam Water in Comparison with Sodium Fluoride

Author: Dr. Nibal Mohammed Hoobi, B.D.S., M. Sc. د.نبال محمد يوسف
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2011 Volume: 8 Issue: 2 Pages: 134-138
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

AbstractZamzam water has scientifically been proven to contain high concentration ofcalcium, magnesium, fluoride and many other minerals. This study aimed to test theability of zamzam water to increase the resistance of enamel surface against aciddissolution compared to sodium fluoride. Teeth sample of 15 maxillary first premolarswere randomly divided into 3 groups, study group treated with zamzam water, controlpositive treated with sodium fluoride and control negative treated with deionizedwater. The treatment lasted for two minutes once daily for 20 days interval. Then theconcentration of the dissolved calcium ion in the etching solution of 2N HCl wasmeasured by flame atomic absorption spectrometer. The amount of the releasedcalcium ion from zamzam water treated group was lesser than that released fromsodium fluoride treated group. However the difference was statistically notsignificant. A highly significant more calcium was dissolved from the water controlgroup compared with the mentioned agents P<0.01. Zamzam water effectivelyincrease tooth resistance against acid dissolution, therefore it is useful to hardenenamel surface against dental caries challenge.


Article
Evaluation of nano surface modification on CPTi dental implant using chemical method: mechanical and histological evaluation

Authors: Ban Nahal Shukur --- Raghdaa Karem Jassim رغداء كريم جاسم
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2015 Volume: 27 Issue: 3 Pages: 8-14
Publisher: Baghdad University جامعة بغداد

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Abstract

Background The application of nanotechnology to biomedical surfaces is explained by the ability of cells to interactwith nanometric features. The aim of this study was to consider the role of nanoscale topographic modification of CPTidental implant using chemical etching method for the purpose of improving osseointegration.Materials and methods: Commercial pure titanium rod was machined into 20 dental implants. Each implant wasmachined in diameter about 3mm, length of 8mm (5mm was threaded part and 3mm was flat part). Implants wereprepared and divided into 2 groups according to the types of surface modification method used: 1st group (10implant) remained without nano surface modification (control), 2nd group include (10 implant) etched with 15N H2SO4and 30% H2O2, Surfaces were characterized by scanning electron microscope (SEM), Xray diffraction (XRD), atomicforce microscope (AFM), thickness measurement for the invitro experiments. While for invivo part tibia of 5 white newZealand rabbits were chosen as implantation sites. The tibia of each rabbit received two screws. Biomechanical testwas performed to understand the bone-implant interface, after two weeks healing periods. Implants from 4animalswere tested for the torque required to remove the implant from the bone and the other one animal was prepared forhistological examination.Results and Conclusion: For in vitro results, scanning electron microscope showed that the chemical etching of Tisubstrate becomes highly porous and has surface consisting of nanosized pits. Removal torque means value after 2weeks of implantation mentioned that, there was a gradual increase in the removal torque mean values as a follow(M±SD): 12.625(N.cm) ± 0.517, 30.500(N.cm) ± 4.071for machined surface(X), nano chemically etched (X1) respectively.In addition, the histological analysis showed improved quality of bone in response to the nano modified screws, thatthe chemically treated implants shows trabeculated thread


Article
Laser versus conventional acid etching technique on bond strength on orthodontic brackets (An in vitro study)

Authors: Zaid A Ibrahim --- Abdul– Rahman I Ali --- Khidhair A Al–Jumaili
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 3 Pages: 124-130
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: This in vitro study was undertaken to evaluate and compare the effect of acid etching and/or diode laser (1064 nm) irradiation on shear bond strength of orthodontic brackets. Materials and Methods: Thirty freshly extracted human premolars were included in this study. Laser irradiation was done by using the new 1064 nm diode laser with output power of 2.5 Watt in continues mode, also use stainless steel orthodontic brackets (Roth, 22–slot size), and use orthodontic flowable composite resin which needs no bonding fluid. The 30 human teeth were divided into 3 groups (each group consist of 10 teeth): Group A–use acid etching (37% phosphoric acid) for 1 minute to bond bracket to tooth surface (control group), group B–use laser irradiation for 30 seconds with Indian ink (coated on teeth). Group C–use laser irradiation for 30 seconds with Indian ink after that use acid etching for 1 minute. Shear bond strength measured by using unconfined shear testing machine at a cross head speed of 5 mm/min. Results: The shear bond strength means were as follows: Group A: 11.27 MPa, group B: 6.21 MPa, group C: 14.04 MPa. The acid etching after 1064 nm diode laser irradiation (group C) has significantly higher bond strength (p 0.05) than remaining groups. In group B, orthodontic brackets had significantly lower shear bond strength (p 0.05) than remaining groups. Conclusions: These results indicate that acid etching after laser irradiation enhances and improves the bonding of orthodontic composite resin to human enamel. In the same time 1064 nm diode laser irradiation with ink coating is not consider as a replacement to acid etching in bonding of orthodontic brackets to human enamel


Article
Evaluation of Shear Bond Strength of Composite Resin to Dentin after Etching with Er,Cr:YSGG Laser And Conventional Acid Etch (An In Vitro Study

Author: Saif Nadhim Hassoon سيف نديم حسون
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2015 Volume: 3 Issue: 1 Pages: 45-54
Publisher: Tikrit University جامعة تكريت

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Abstract

The aim of this study was to evaluate shear bond strength of composite to dentin after etching with conventional acid, Er,Cr:YSGG laser and Er,Cr:YSGG laser in conjunction with acid. Thirty recently extracted lower third molars were collected. Scaling and polishing of teeth were done. Roots of teeth were embedded inside self cured acrylic resin blocks to form acrylic base with occlusal surfaces parallel to base of blocks. Crowns of teeth were sectioned at one third of the crowns to obtain a flat dentin surfaces. Total number of samples were divided into 3 groups each of one contained (10) samples as following : Group 1- dentin surfaces were treated with 35% phosphoric acid only. Group 2- dentin surfaces were treated with Er,Cr:YSGG laser only. Group 3- dentin surfaces were initially treated with Er,Cr:YSGG laser, then with 35% phosphoric acid. Bonding agent was applied to dentin surfaces and composite was applied by using rubber mold then light cured. Composite posts were released from molds then shear bond strength was measured. Statistical analysis showed that there was significant difference among all groups and acid etching group showed significant highest Shear bond strength followed by group of laser & acid etching then group of laser etching showed the significant least shear bond strength. From this study it can be concluded that etching of dentin with Er,Cr:YSGG laser can produce shear bond strength weaker than that of conventional acid etching.


Article
Viscous acid etching agent

Authors: Hussain A OBAIDI --- Issam K AL-KHAYAT
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 1 Pages: 40-43
Publisher: Mosul University جامعة الموصل

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Abstract

The acid etching effect of a new viscous 35% phosphoric acid dissolved in glycerol and known 35% gel phosphoric acid agent were investigated in vitro on 40 sound extracted premolars using concise orthodontic adhesive in bonding stainless orthodontic brackets. The results showed no significant difference in bond strength between the two etching agents at 0.05 significant level. But samples etched with Viscous phosphoric acid have higher numerical value. This finding was supported by the clinical investigation on 10 orthodontic patients in which the number of failure brackets was 8 for viscous phosphoric acid etching agent and 12 for gel phosphoric | acid agent after 11 months of treatment

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