scholarly journals Evaluation of conventional and digital radiography capacities for distinguishing dental materials on radiograms depending on the present radiopacifying agent

2014 ◽  
Vol 71 (11) ◽  
pp. 1006-1012 ◽  
Author(s):  
Djordje Antonijevic ◽  
Dragan Ilic ◽  
Vesna Medic ◽  
Slobodan Dodic ◽  
Kosovka Obradovic-Djuricic ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Portland Cement ◽  
Digital Radiography ◽  
Imaging System ◽  
Dental Materials ◽  
Conventional Radiography ◽  
Barium Sulphate ◽  
Equivalent Thickness ◽  
Two Factors ◽  
Diagnostic Capabilities

Bacgroun/Aim. The radiopacity of an endodontic material can considerably vary as measured on film and a digital sensor. Digital radiography offers numerous advantages over convential film-based radiography in dental clinical practice regarding both diagnostic capabilities and postintervention procedures. The aim of this study was to investigate the capacity of conventional and charge-conpled device (CCD) based digital radiography to detect material on radiograph depending on the radio-pacifying agent present in the material. Methods. Experimental cements were formulated by mixing Portland cement with the following radiopacifying agents: zinc oxide (ZnO), zirconium oxide (ZrO2), titanium dioxide (TiO2), barium sulphate (BaSO4), iodoform (CHI3), bismuth oxide (Bi2O3) and ytterbium trifluoride (YbF3). In addition, 5 endodontic materials comprising Endomethasone?, Diaket?, N2?, Roth 801? and Acroseal? were investigated to serve as control. Per three specimens of each material were radiographed alongside an aluminum step wedge on film (Eastman Kodak Company?, Rochester, NY) and a CCD-based digital sensor (Trophy Radiologie?, Cedex, France). Radiopacity values were calculated by converting the radiographic densities of the specimens expressed as a mean optical densities or mean grey scale values into equivalent thickness of aluminum. Results. Twoway ANOVA detected no significant differences with respect to the imaging system (p > 0.05), but the differences were significant with respect to radiopacifier (p < 0.001) and the interaction of the two factors (p < 0.05). Paired ttest revealed significant differences between the methods used for pure Portland cement, all concentrations of BaSO4 and CHI3, 10% and 20% additions of ZrO2 and Bi2O3 and 10% and 30% addition of YbF3 (p < 0.05). Conclusion. The materials which incorporate CHI3 or BaSO4 as radiopacifying agents are expected to be significantly more radiopaque on a digital sensor than on film. During clinical practice one should concern to the quality of contrast assessement obtained by digital according to conventional radiography.

Digital Radiography vs Conventional Radiography: Is Digital Radiography in Compliance With the Code?

2002 ◽  
Author(s):  
Richard W. Poland ◽  
David M. Immel ◽  
Boyd D. Howard
Keyword(s):  
Digital Radiography ◽  
Dynamic Range ◽  
Transfer Functions ◽  
Imaging System ◽  
Conventional Radiography ◽  
Radiographic Imaging ◽  
Modulation Transfer ◽  
Savannah River ◽  
Charge Coupled Device ◽  
Conventional Film

Savannah River Technology Center filmless radiographic imaging system specialists have been “champions” of filmless radiographic imaging at the Savannah River Site since 1993. Recently a study was done comparing the differences between conventional film radiography and lens-coupled, charge-coupled-device digital radiography. Characteristics of both imaging methods that were considered in the study included resolution, latitude (called dynamic range by digital radiography imaging specialists), and modulation transfer functions. The results of those comparative experiments will be presented. A description of the lens-coupled, digital radiography imaging system will be provided.

scholarly journals Evaluation of Radiopacity of Bulk-fill Flowable Composites Using Digital Radiography

2016 ◽  
Vol 41 (4) ◽  
pp. 424-431 ◽  
Author(s):  
B Tarcin ◽  
B Gumru ◽  
S Peker ◽  
HS Ovecoglu
Keyword(s):  
Digital Radiography ◽  
Digital Imaging ◽  
Imaging System ◽  
International Standards ◽  
Equivalent Thickness ◽  
Standard Specimens ◽  
Phosphor Plate ◽  
International Standards Organization ◽  
Flowable Composites ◽  
Gray Values

SUMMARY New flowable composites that may be bulk-filled in layers up to 4 mm are indicated as a base beneath posterior composite restorations. Sufficient radiopacity is one of the several important requirements such materials should meet. The aim of this study was to evaluate the radiopacity of bulk-fill flowable composites and to provide a comparison with conventional flowable composites using digital imaging. Ten standard specimens (5 mm in diameter, 1 mm in thickness) were prepared from each of four different bulk-fill flowable composites and nine different conventional flowable composites. Radiographs of the specimens were taken together with 1-mm-thick tooth slices and an aluminum step wedge using a digital imaging system. For the radiographic exposures, a storage phosphor plate and a dental x-ray unit at 70 kVp and 8 mA were used. The object-to-focus distance was 30 cm, and the exposure time was 0.2 seconds. The gray values of the materials were measured using the histogram function of the software available with the system, and radiopacity was calculated as the equivalent thickness of aluminum. The data were analyzed statistically (p&lt;0.05). All of the tested bulk-fill flowable composites showed significantly higher radiopacity values in comparison with those of enamel, dentin, and most of the conventional flowable composites (p&lt;0.05). Venus Bulk Fill (Heraeus Kulzer) provided the highest radiopacity value, whereas Arabesk Flow (Voco) showed the lowest. The order of the radiopacity values for the bulk-fill flowable composites was as follows: Venus Bulk Fill (Heraeus Kulzer) ≥ X-tra Base (Voco) &gt; SDR (Dentsply DeTrey) ≥ Filtek Bulk Fill (3M ESPE). To conclude, the bulk-fill flowable restorative materials, which were tested in this study using digital radiography, met the minimum standard of radiopacity specified by the International Standards Organization.

Diagnosis of Gastric Cancers: Comparison of Conventional Radiography and Digital Radiography with a 4 Million-Pixel Charge-coupled Device

Radiology ◽  
2000 ◽  
Vol 214 (2) ◽  
pp. 497-502 ◽  
Author(s):  
Gen Iinuma ◽  
Kyosuke Ushio ◽  
Tsutomu Ishikawa ◽  
Shigeru Nawano ◽  
Ryuzou Sekiguchi ◽  
...  
Keyword(s):  
Digital Radiography ◽  
Conventional Radiography ◽  
Charge Coupled Device ◽  
Gastric Cancers

scholarly journals An in vitro Comparison of Root Canal Measurement in Permanent Teeth by Electronic Apex Locator, Conventional and Digital Radiography

2011 ◽  
Vol 2 (4) ◽  
pp. 312-315
Author(s):  
Alexander LNU ◽  
Musab Hamed Saeed ◽  
Nazil A Abtahl ◽  
A Praveen Pradeep
Keyword(s):  
Failure Rate ◽  
Digital Radiography ◽  
Root Canal ◽  
Correlation Coefficients ◽  
Conventional Radiography ◽  
Permanent Teeth ◽  
Radiographic Measurements ◽  
Interclass Correlation ◽  
Working Length ◽  
Electronic Apex Locator

ABSTRACT Introduction In endodontic treatment for permanent teeth, it is important to estimate the working length precisely. Currently, various methods are used in clinical practice for working length estimation. The objective of this study is to compare the accuracy of root canal length in permanent teeth determined by electronic apex locators, conventional and digital radiography. Materials and methods A total of 50 single rooted permanent teeth with mature apices were extracted for periodontal reasons and obtained from different sources without caries were studied. The radiographic measurements were done using paralleling technique. Electronic measurements were done next using third generation, DentAport ZX. Actual canal length of each tooth was measured using direct observation of the apical exit of the file. Measurements obtained from radiographic and electronic methods were compared to the actual tooth length. Interclass correlation coefficients and failure rate for each method and their combinations were calculated using STATA 12.0 software. Results The measurements obtained through all the three techniques showed high interclass correlation coefficients and excellent level of agreement. The failure rate of measurements obtained through conventional radiography, digital radiography and electronic apex locators was 38, 30 and 22% respectively. Combination of conventional radiography with electronic apex locator showed an accuracy of 90%, while combination of digital radiographs and electronic apex locators given an accuracy of 96%. Conclusion A combination of digital radiographic and apex locator methods for determining the root canal length in permanent teeth can be considered safe, reliable and precise.

scholarly journals Comparative evaluation to determine the efficacy of conventional radiography, digital radiography and ultrasound imaging in the diagnosis of periapical lesions

2021 ◽  
Vol 1 (3) ◽  
Author(s):  
Rajesh Gupta ◽  
Preety Gupta ◽  
Shivani Gupta, ◽  
Sumit Garg
Keyword(s):  
Ultrasound Imaging ◽  
Digital Radiography ◽  
Histopathological Examination ◽  
Conventional Radiography ◽  
Test Results ◽  
Periapical Lesions ◽  
Periapical Granuloma ◽  
Mandibular Teeth ◽  
Wallis Anova ◽  
Histopathological Investigation

In recent time several imaging modalities have been implicated for diagnosing periapical lesion. The present study is carried out to determine and compare the nature and extent of periapical lesions using conventional radiography, digital radiography and ultrasound imaging and to confirm the diagnosis with histopathological examination. Thirty patients aged between 15 and 45 years with well-defined periapical radiolucency associated with anterior maxillary or mandibular teeth requiring endodontic surgery or extraction were selected. The pre-operative intraoral periapical radiographs and digital images and were diagnosed by three observers. Ultrasound examination was performed and the images were assessed by an ultrasonographer. The periapical tissues were obtained to enable histopathological investigation. The data was statistically analysed using the kappa procedure, Kruskal Wallis Anova & Mann-Whitney U test. Results showed that the percentage accuracy of diagnosing periapical lesions using conventional radiography, digital radiography and ultrasound was – 86.67%, 93.33% & 93.33% respectively. Thus, we conclude that ultrasound helps in distinguishing between periapical granuloma and cyst which is of importance in predicting the treatment outcome. So, ultrasound can be used as an adjunct to conventional or digital radiography in diagnosing periapical lesions.

Accelerating the Setting of Portland Cement Based Dental Materials Using Calcium Sulphates

2007 ◽  
pp. 343-346
Author(s):  
J.L. O’Beirne ◽  
R.M. Shelton ◽  
P.J. Lumley ◽  
M.P. Hofmann
Keyword(s):  
Portland Cement ◽  
Dental Materials

Soft Tissue Infections

2019 ◽  
pp. 102-108
Author(s):  
Sumer N. Shikhare ◽  
Wilfred C. G. Peh
Keyword(s):  
Soft Tissue ◽  
Early Diagnosis ◽  
Disease Process ◽  
Conventional Radiography ◽  
Diagnostic Value ◽  
Soft Tissue Infections ◽  
Cross Sectional ◽  
Clinical Presentations ◽  
Cross Sectional Imaging ◽  
Diagnostic Capabilities

Chapter 88 outlines the key radiologic features of soft tissue infections and the diagnostic value of the different imaging modalities such as conventional radiography, US, CT, and MRI. Soft tissue infections present in various forms that involve varying depths from skin to deeper tissues. Early diagnosis may be challenging because of nonspecific clinical presentations, resulting in delay in management. The advent of cross-sectional imaging has improved diagnostic capabilities dramatically, with US, CT, and particularly MRI being the pillars of evaluation. Prompt and appropriate imaging workup of the various MSK soft tissue infections aids early diagnosis and in demonstrating the extent of the disease process, as treatment delay significantly reduces the cure rate and increases the risk of complications.

Sign in / Sign up

Export Citation Format

Share Document