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Article
Assessing The Radiopacity of Three Resin Composite Materials Using a Digital Radiography Technique

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Abstract

Background: Radiopacity is one of the prerequisites for dental materials, especially for composite restorations. It's essential for easy detection of secondary dental caries as well as observation of the radiographic interface between the materials and tooth structure. The aim of this study to assess the difference in radiopacity of different resin composites using a digital x-ray system.Materials and methods: Ten specimens (6mm diameter and 1mm thickness) of three types of composite resins (Evetric, Estelite Sigma Quick,and G-aenial) were fabricated using Teflon mold. The radiopacity was assessed using dental radiography equipment in combination with a phosphor plate digital system and a grey scale value aluminum step wedge with thickness varying from 1mm to 10mm in steps of 1mm each. The tested materials were radiographed, we used Image J software, on a computer screen to evaluate the degree of radiopacity for each individual material and compare with the aluminum step wedge. Radiopacity was expressed in mm of equivalent aluminum step wedge. Analysis of varience (ANOVA) and Least Significant Difference (LSD) were used to investigate the significance of differences among the tested groups.Results: Statistical analysis showed highly significant difference among the tested groups (p≤0.01). Amongst, G-aenial composite shows the most radiopaque and it is above or equivalent to that of enamel, while Estelite Sigma Quick composite has the lowest radiopacity value and is equivalent to that of dentin.Conclusion: In line with previous studies, and within the limitation of our study, considerable variations in radiopacity values were found among materials depending on the radiopaque elements incorporated into the matrix. All composite materials tested complied with the ISO 4049 standard


Article
Validity & reliability of cephalometric measurements in traditional versus digitized cephalometry

Authors: Ass.prof. Nagham Al-Sahaf B.D.S, M.Sc. د. نغم الصحاف --- Ass. Prof. Asmaa Tahseen Uthman B.D.S, M.Sc .* د.اسماء تيسير
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2006 Volume: 3 Issue: 3 Pages: 233-238
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Aim: Film digitization is generally used to prevent potential damage or loss oforiginal films. The method of film processing has been changing from wet to dryprocessing due to recent trends toward digitization of medical imaging.Materials & Methods: 50 Lateral cephalometric radiograms were used in this study.All radiographs were viewed under standardized conditions& traced. Elevenlandmarks were selected to calculate 12 variables (9 angles&3 linearmeasurements).These traced radiographs were photographed when digitized using scan jet scanner &the same variables were measured using Dimaxis pro classic imaging software.Results: There were no statistically significant differences between traditional&digitized Linear & angular measurements except for upper incisor-Frankfortplane angle & upper incisor-lower incisor angle.Conclusion: Angular & linear measurements in digital images were comparable withthat of original radiograph & are clinically acceptable. This will substantiate thebenefits of digitized cephalometry in term of reliability of cephalometric analysis.


Article
Effects of proximal caries with loss of contact on alveolar bone levels in primary molars of Iraqi children using modified bitewing digital imaging

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Abstract

Destructive forms of periodontal disease can occur in children & adolescents.Proximal caries, gingival inflammation & loss of lamina dura are risk factors indevelopment of alveolar bone loss. This study aims to determine the effect ofproximal caries with loss of contact of primary molars on interdental hard tissuesusing a modified bitewing digital imaging technique .One hundred Iraqi children(7&8 years old) of both sexes were included in this study, half of them havingproximal caries in their primary molars & served as study group & the other halfserved as control. The results showed a significant increase in marginal &interproximal alveolar bone crest height in study group with male predominance. Lossof lamina dura & irregular crestal bone appearance was also evident around primarymolars with proximal caries. Non significant relationship was found between gingivalinflammation & interdental hard tissues. The results indicated that proximal carieswith loss of contact play an important role in development of incipient periodontaldisease in children.


Article
Assessing the radiopacity of new root end filling materials using digital radiography technique

Author: Dr. Raghad A. Al-Hashimi, BDS, MSc, PhD د. رغد عبد الرزاق الهاشمي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2015 Volume: 12 Issue: 1 Pages: 10-15
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Background: Radiographic discrimination of root end filling materials fromsurrounding tooth structure is clinically relevant for assessing the quality ofretrograde treatment. The present study aimed at evaluating the radiopacity ofBiodentine™ and Pro Root MTA as root end filling materials using a digitalradiography technique.Materials and Methods: Specimens of BiodentineTM and Pro Root MTA testmaterials with 1mm thick and 10 mm internal diameter were prepared for digitalradiographic analysis using an aluminum washer. The radiopacity of theBiodentine™ and Pro Root MTA was assessed using dental radiographyequipment in combination with a phosphor plate digital system and a grey scalevalue aluminum step wedge with thicknesses varying from 1 mm to 10 mm insteps of 1 mm each. The degree of radiopacity of the test materials wereradiographed and compared together with the aluminum step wedge on acomputer screen using image J software. Radiopacity was expressed in mm ofequivalent aluminum step wedge. The radiopacity values of Biodentine™ and ProRoot MTA were statistically analyzed using the one way analysis of variance(ANOVA) and post-hoc test (Bonferroni test), the level of significance was set at0.05 (P<0.05). Results: The radiographic data showed that the degree ofradiopacity of Pro root MTA is significantly higher than that of Biodentine™(P<0.001). The current study reported that the ProRoot MTA showed requisiteradiopacity around 5.86 mm when compared with aluminum step wedge steps,whereas the radiopacity of Biodentine™ determined around 2.46 mm ofequivalent aluminum.Conclusion: The radiopacity of Pro Root MTA is clinically relevant that allows forclear distinction between the material and the surrounding tooth structure enablingit to be used as root end filling material. However, Biodentine showed reducedradiopacity that needs further improvement.

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