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Camarda AJ, Durand R, Benkarim M, Rompré PH, Guertin G, Ciaburro H. Prospective randomized clinical trial evaluating the effects of two different implant collar designs on peri-implant healing and functional osseointegration after 25 years. Clin Oral Implants Res 2021; 32:285-296. [PMID: 33314332 DOI: 10.1111/clr.13699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 11/15/2020] [Accepted: 11/26/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Evaluate the effects of two different machined-collar lengths and designs on peri-implant healing. MATERIAL AND METHODS An implant with a microtextured surface and 3.6mm-long internal-connection machined collar was compared to two implants that had an identical 1.2mm-long external-connection machined collar, but one had the microtextured surface while the other's was machined. Participants received the three implants, with microgap at the crest, alternately at five sites between mental foramen, and a full-arch prosthesis. Peri-implant bone levels were measured after 23 to 26 years of function. Keratinized tissue height, plaque, probing depth, bleeding, and purulence were also evaluated. Descriptive and mixed models for repeated\measures analyses were used, with Bonferroni correction for pairwise comparisons. RESULTS Twenty-two participants (110 implants) were evaluated at the 25-year examination. Microtextured implants with the longer machined collar had significantly greater mean marginal bone loss (-1.77mm ± 0.18, mean ± SE) than machined (-0.85mm ± 0.18, p < .001) and microtextured (-1.00 ± 0.18mm, p < .001) implants with the shorter machined collar. Keratinized tissue height was greater for internal-connection (0.74mm ± 0.10) versus external-connection (0.51 ± 0.08, p = 0.01) microtextured implants. No differences were observed for plaque (p = 0.78), probing depth (p = 0.42), bleeding (p = 0.07), and purulence (p = 1.00). Implant survival rate was 99%. CONCLUSIONS Implants with the 1.2mm machined collar limited bone loss to 1mm, while those with the longer machined collar showed > 1.5mm loss after 25 years of function with microgap at the crest. Internal-connection design and fixture surface microtexturing did not result in greater bone preservation. ClinicalTrials.gov Identifier: NCT03862482.
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Affiliation(s)
- Aldo Joseph Camarda
- Département de stomatologie, Faculty of Dental Medicine, Université de Montréal, Pavillion Roger-Gaudry, Montreal, QC, Canada
| | - Robert Durand
- Département de santé buccale, Faculty of Dental Medicine, Université de Montréal, Montreal, QC, Canada
| | - Marwa Benkarim
- Faculty of Dental Medicine, Université de Montréal, Montreal, QC, Canada
| | - Pierre H Rompré
- Faculty of Dental Medicine, Université de Montréal, Montreal, QC, Canada
| | - Geneviève Guertin
- Département de dentisterie de restauration, Faculty of Dental Medicine, Université de Montréal, Montreal, QC, Canada
| | - Hugo Ciaburro
- Département de dentisterie de restauration, Faculty of Dental Medicine, Université de Montréal, Montreal, QC, Canada
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Aydin KC, Demirel O, Özcan M. Comparison of two digital intraoral radiography imaging systems as a function of contrast resolution and exposure time. ACTA ACUST UNITED AC 2020; 69:148-152. [PMID: 32610723 DOI: 10.23736/s0026-4970.19.04286-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND To compare the image quality of two different digital imaging systems; one photostimulable phosphor plate system (PSP) and a direct digital radiography system with CMOS imaging sensor; via evaluating contrast resolution among four different exposure times. METHODS Endodontically treated incisor teeth embedded in paraffin blocks are aligned next to a 99.5% Al wedge and exposed for 0.8, 0.1,0.125 and 0.16 seconds using both the CMOS and PSP systems. Using ImageJ software, 5 isometric and isogridded ROI from each root filling area and isometric ROI from the Al stepwedge were calculated. RESULTS Evaluation of the total of 120 images displayed that PSP system produced significantly higher contrast resolution (P<0.05) in regard to pixel values than the CMOS. The CMOS system was non- responsive to increasing dose (P=0.000). Regarding the EqAl values, no significant difference was determined between groups (P>0.05). CONCLUSIONS The contrast resolution was higher using the PSP system. It can be estimated that, filling material will be more obvious under lower doses using PSP.
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Affiliation(s)
- Kader C Aydin
- Department of Dentomaxillofacial Radiology, School of Dentistry, Istanbul Medipol University, Istanbul, Turkey -
| | - Oğuzhan Demirel
- Department of Dentomaxillofacial Radiology, School of Dentistry, Istanbul, Turkey
| | - Mutlu Özcan
- Unit of Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zürich, Switzerland
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Teich S, Al-Rawi W, Heima M, Faddoul FF, Goldzweig G, Gutmacher Z, Aizenbud D. Image quality evaluation of eight complementary metal-oxide semiconductor intraoral digital X-ray sensors. Int Dent J 2016; 66:264-71. [PMID: 27103603 DOI: 10.1111/idj.12241] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
PURPOSE To evaluate the image quality generated by eight commercially available intraoral sensors. METHODS Eighteen clinicians ranked the quality of a bitewing acquired from one subject using eight different intraoral sensors. Analytical methods used to evaluate clinical image quality included the Visual Grading Characteristics method, which helps to quantify subjective opinions to make them suitable for analysis. RESULTS The Dexis sensor was ranked significantly better than Sirona and Carestream-Kodak sensors; and the image captured using the Carestream-Kodak sensor was ranked significantly worse than those captured using Dexis, Schick and Cyber Medical Imaging sensors. The Image Works sensor image was rated the lowest by all clinicians. Other comparisons resulted in non-significant results. CONCLUSIONS None of the sensors was considered to generate images of significantly better quality than the other sensors tested. Further research should be directed towards determining the clinical significance of the differences in image quality reported in this study.
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Affiliation(s)
- Sorin Teich
- School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - Wisam Al-Rawi
- School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Masahiro Heima
- School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - Fady F Faddoul
- School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - Gil Goldzweig
- Academic College of Tel Aviv-Yaffo, Tel-Aviv, Israel
| | - Zvi Gutmacher
- School of Graduate Dentistry, Rambam Health Care Campus and Bruce Rappaport Faculty of Medicine - Technion, Israel Institute of Technology, Haifa, Israel
| | - Dror Aizenbud
- School of Graduate Dentistry, Rambam Health Care Campus and Bruce Rappaport Faculty of Medicine - Technion, Israel Institute of Technology, Haifa, Israel.
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In vitro comparison of three different image receptors for determining the length of endodontic files. J Dent Sci 2014. [DOI: 10.1016/j.jds.2012.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Abstract
OBJECTIVES Doses induced by individual dental examinations are low. However, dental radiography accounts for nearly one third of the total number of radiological examinations in the European Union. Therefore, special attention is needed with regard to radiation protection. In order to lower patient doses, the staff performing dental examinations must have competence in imaging as well as in radiation protection issues. This paper presents a systematic review about the core competencies needed by the healthcare staff in performing digital dental radiological imaging quality assurance. MATERIALS AND METHODS The following databases were searched: Pubmed, Cinahl, Pro Quest and IEEXplore digital library. Also volumes of some dental imaging journals and doctoral theses of the Finnish universities educating dentists were searched. The search was performed using both MeSH terms and keywords using the option 'search all text'. The original keywords were: dental imaging, digital, x-ray, panoramic, quality, assurance, competence, competency, skills, knowledge, radiographer, radiologist technician, dentist, oral hygienist, radiation protection and their Finnish synonyms. RESULTS Core competencies needed by the healthcare staff performing digital dental radiological imaging quality assurance described in the selected studies were: management of dental imaging equipment, competence in image quality and factors associated with it, dose optimization and quality assurance. CONCLUSIONS In the future there will be higher doses in dental imaging due to increasing use of CBCT and digital imaging. The staff performing dental imaging must have competence in dental imaging quality assurance issues found in this review. They also have to practice ethical radiation safety culture in clinical practice.
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Affiliation(s)
- Eija Metsälä
- Degree Programme of Radiography and Radiotherapy, Helsinki Metropolia University of Applied Sciences , Helsinki , Finland
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Bodanezi A, Munhoz EA, Capelozza ALÁ, Bernardineli N, Moraes IGD, Garcia RB, Bramante CM. Influence of root canal sealer on the radiographic appearance of filling voids in maxillary single-rooted teeth. J Appl Oral Sci 2013; 20:404-9. [PMID: 23032200 PMCID: PMC3881829 DOI: 10.1590/s1678-77572012000400003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2010] [Accepted: 10/01/2011] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE This study compared the influence of three epoxy resin-based sealers with distinct radiopacities on the observers' ability to detect root canal filling voids during radiographic analysis. MATERIAL AND METHODS The root canals of 48 extracted maxillary canines were prepared and divided into three groups. Each group was laterally condensed with one sealer (AH Plus®, Acroseal® or a non-radiopaque sealer), and a longitudinal void was simulated in half of the specimens from each group (n=8). Buccolingual radiographs were obtained and randomly interpreted for voids by a radiologist and an endodontist in a blinded fashion. Teeth were cut and inspected under a microscope to confirm the position of void. Differences in sensitivity and specificity between groups and examiners were compared using the Fisher's Exact and McNemar tests, respectively (α=0.05). RESULTS Significantly lower sensitivity levels (p<0.05) were observed in the coronal portion of fillings performed with both radiopaque sealers. Specificity values for Acroseal® were significantly higher (p<0.05) in the coronal and apical portions of fillings. CONCLUSIONS The type of root canal sealer can affect the observers' ability to detect root canal filling voids during radiographic analysis of upper single-rooted teeth.
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Affiliation(s)
- Augusto Bodanezi
- Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, RS, Brazil.
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Aktan AM, Ciftçi ME, Akgünlü F. Comparison of the delay in processing time and protective plastic cases in two phosphor plate systems. ScientificWorldJournal 2012; 2012:850764. [PMID: 23213301 PMCID: PMC3504408 DOI: 10.1100/2012/850764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 10/09/2012] [Indexed: 12/13/2022] Open
Abstract
Objective. The purpose of this study was to analyze two phosphor plate systems (PSPs) (Dürr Dental, Digora Optime) according to their scanning delay and protective plastic case performances. Methods. Two PSPs using an aluminum step wedge were exposed. These plates were placed in three different protective plastic cases (manufacturers' original cases, black case, and white case) before obtaining the radiographs and were then processed immediately and 1, 5, 10, 30, 60, 120, 240, and 480 min after exposure. Mean gray values (MGVs) of the 3rd, 5th, 7th, and 9th steps of the wedges were compared using ANOVA. Results. Statistically significant differences were found between the two PSPs (P < 0.001). ANOVA revealed that the MGVs of four steps of the wedges were significantly different from each other for all scan delays (P < 0.001). MGVs increased with increasing scanning delay, except the group with Dürr plates in their original cases. Reduction in image quality began 5 min after exposure in the other Dürr plate groups. Conclusions. Within the limitations of the current study, it can be concluded that scanning delay causes a reduction in image quality, and using the manufacturer's original protective case will result in better performance of PSPs.
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Affiliation(s)
- Ali Murat Aktan
- Department of Oral and Maxillofacial Radiology, Gaziantep University, 27310 Gaziantep, Turkey
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El-Angbawi AMF, McIntyre GT, Bearn DR, Thomson DJ. Film and digital periapical radiographs for the measurement of apical root shortening. J Clin Exp Dent 2012; 4:e281-5. [PMID: 24455036 PMCID: PMC3892213 DOI: 10.4317/jced.50872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Accepted: 08/07/2012] [Indexed: 12/05/2022] Open
Abstract
Objectives: The aim of this study was to compare the accuracy and agreement of scanned film and digital periapical radiographs for the measurement of apical root shortening.
Study design: Twenty-four film and digital [phosphor plate sensor (PPS)] periapical radiographs were taken using the long-cone paralleling technique for six extracted teeth before and after 1mm of apical root trimming. All teeth were mounted using a typodont and the radiographs were recorded using a film holder and polysiloxane occlusal index for each tooth to ensure standardization during the different radiographic exposures. The film radiographs were scanned and the tooth length measurements for the scanned film and digital (PPS) images were calculated using Image-J-Link 1.4 software (http://rebweb.nih.gov/ij/index.html) for the two groups. The accuracy and agreement among the tooth length measurements from each group and the true tooth length measurements were calculated using intra-class correlation (ICC) tests and Bland and Altman plots.
Results: A high level of agreement was found between the true tooth length measurements and the scanned film measurements (ICC=0.979, limit of agreement 0.579 to -0.565) and the digital (PPS) radiograph measurements (ICC= 0.979, limit of agreement 0.596 to -0.763). Moreover, a high level of agreement was found between the scanned film and digital (PPS) radiographs for the measurement of tooth length ICC=0.991, limit of agreement 0.411-0.231.
Conclusion: Film and digital (PPS) periapical radiographs are accurate methods for measuring apical root shortening with a high level of agreement.
Key words:Root shortening, measurement, periapical radiographs, film, digital.
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Affiliation(s)
- Ahmed M F El-Angbawi
- BDS, MSc. PhD student, Orthodontic Department, Dundee Dental Hospital and School, University of Dundee, Dundee, DD1 4HR, UK
| | - Grant T McIntyre
- BDS, FDS RCPS, MOrth RCS, PhD, FDS(Orth) RCPS, FDS RCS. Consultant / Honorary Senior Lecturer, Orthodontic Department, Dundee Dental Hospital and School, University of Dundee, Dundee, DD1 4HR, UK
| | - David R Bearn
- BDS, MSc, PhD, FDS(Orth) RCPS, MOrth RCS, FHEA. Professor / Honorary Consultant, Orthodontic Department, Dundee Dental Hospital and School, University of Dundee, Dundee, DD1 4HR, UK
| | - Donald J Thomson
- BDS, FDS RCS, DDR RCR Consultant / Honorary Senior Clinical Teacher, Department of Dental & Maxillofacial Radiology, Dundee Dental Hospital and School, University of Dundee, Dundee, DD1 4HR, UK
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Diagnostic accuracy of Digora Optime storage phosphor plates for proximal subsurface demineralization: effect of different exposure times. Oral Surg Oral Med Oral Pathol Oral Radiol 2012; 114:e78-84. [PMID: 22981097 DOI: 10.1016/j.oooo.2012.05.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Revised: 03/09/2012] [Accepted: 05/28/2012] [Indexed: 11/21/2022]
Abstract
OBJECTIVE The aim of this study was to compare the diagnostic accuracy of F-speed film and storage phosphor plate (SPP) exposed with different exposure times for the detection of artificial enamel subsurface demineralization. STUDY DESIGN Standard enamel windows of extracted premolars were exposed to a demineralizing solution. All teeth were radiographed before and after acid application with F-speed films and SPPs. Films were exposed for 0.25 seconds and SPPs were exposed using 4 exposure times. Receiver operating characteristic analysis was used for diagnostic accuracy (A(z)). RESULTS Significant differences were obtained among A(z)s of 0.08- versus 0.12-seconds and 0.10- versus 0.12-second exposed SPPs (P < .05). A(z)s of films were higher than the SPPs exposed with 0.08, 0.10, and 0.12 seconds (P < .05). No difference was found between the A(z)s of the 2 systems when SPPs were exposed for 0.16 seconds (P > .05). CONCLUSIONS Diagnostic accuracy of films and SPPs was not impaired when exposure time was 36% reduced for the latter; however, diagnosis was impaired when reduced 52%.
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Onem E, Baksi BG, Sen BH, Sögüt O, Mert A. Diagnostic accuracy of proximal enamel subsurface demineralization and its relationship with calcium loss and lesion depth. Dentomaxillofac Radiol 2011; 41:285-93. [PMID: 22074868 DOI: 10.1259/dmfr/55879293] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The aim of this study was to determine the relationship between the amount of calcium loss, lesion depth, and the accuracy of storage phosphor plate (SPP) and film radiographs for the detection of artificial proximal demineralization. METHODS Standard enamel windows of extracted premolars were exposed to a demineralizing solution for 60 h, 80 h, 100 h and 120 h. Solutions were analysed for calcium concentration by atomic absorption spectrometer and the lesion depths were calculated by a specific formula. All teeth were radiographed with SPPs and F-speed films before and after acid application. Images were evaluated by five observers. Stereomicroscopic and scanning electron microscopic (SEM) observations were carried out to visualize enamel surfaces after acid exposure. Receiver operating characteristic analysis was used for diagnostic accuracy (A(z)). A(z)s were compared with factorial analysis of variance and t-tests. The relationship between A(z)s and lesion depths was determined with Pearson's correlation test. RESULTS Strong positive correlation was found between A(z)s of both radiographic methods and lesion depths. No difference was found between the A(z)s of two radiographic systems for any of the demineralization durations (p > 0.05). Pair-wise comparisons revealed no significant difference in A(z)s of SPPs (p > 0.05), while significant differences were obtained for the A(z)s of films for different demineralization periods (p < 0.05). Stereomicroscopic and SEM observations confirmed demineralizations from superficial to deeper layers of enamel. CONCLUSION Subsurface enamel demineralization was not accurately detectable with either storage phosphor plates or F-speed films. The amount of calcium loss and the depth of demineralization have a strong relationship with diagnostic accuracy with a significant effect particularly on F-speed films.
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Affiliation(s)
- E Onem
- Ege Universitesi, Dishekimligi Fakultesi, Oral Diagnoz and Rad AD, Bornova, Izmir, Turkey
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Katsoni E, Tsalafoutas IA, Gritzalis P, Stefanou E, Georgiou E, Yakoumakis E. Exploring the useful exposure range limits of three intraoral image receptors for various tube potential, tube current and exposure time settings. Health (London) 2011. [DOI: 10.4236/health.2011.35051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Modern dental imaging: a review of the current technology and clinical applications in dental practice. Eur Radiol 2010; 20:2637-55. [PMID: 20544352 DOI: 10.1007/s00330-010-1836-1] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Revised: 04/15/2010] [Accepted: 04/29/2010] [Indexed: 02/02/2023]
Abstract
A review of modern imaging techniques commonly used in dental practice and their clinical applications is presented. The current dental examinations consist of intraoral imaging with digital indirect and direct receptors, while extraoral imaging is divided into traditional tomographic/panoramic imaging and the more recently introduced cone beam computed tomography. Applications, limitations and current trends of these dental "in-office" radiographic techniques are discussed.
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Vandenberghe B, Bosmans H, Yang J, Jacobs R. A comprehensive in vitro study of image accuracy and quality for periodontal diagnosis. Part 2: The influence of intra-oral image receptor on periodontal measurements. Clin Oral Investig 2010; 15:551-62. [DOI: 10.1007/s00784-010-0417-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Accepted: 04/14/2010] [Indexed: 11/30/2022]
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Vandenberghe B, Corpas L, Bosmans H, Yang J, Jacobs R. A comprehensive in vitro study of image accuracy and quality for periodontal diagnosis. PART 1: The influence of X-ray generator on periodontal measurements using conventional and digital receptors. Clin Oral Investig 2010; 15:537-49. [DOI: 10.1007/s00784-010-0416-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Accepted: 04/14/2010] [Indexed: 12/01/2022]
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Abstract
OBJECTIVE This systematic review evaluates the six most frequently emphasized advantages of working with digital radiography: less working time, lower radiation dose to the patient, fewer retakes and errors, wider dynamic range, easier access to patient information and easier image storage and communication. Moreover, some clinical aspects and possible disadvantages of digital imaging that were not foreseen at the beginning of the digital era, such as patient discomfort, damage to the receptor, degradation of the image, cross-contamination and viewing conditions, were assessed. MATERIAL AND METHODS The literature search used the PubMed database with no limits and was performed during June to August 2009. Search strategies are described in the text for each of the mentioned tasks. A hand search of task-specific journals supplemented the search strategies. RESULTS Time seems to be saved when switching from film to digital imaging in dental practice, a dose reduction may not be obtained, retakes and errors may be increased, the dynamic range may be wider with photostimulable storage phosphor (PSP) plates but not with sensors, the effect on patient information has not been well studied and storage and communication create new challenges with regard to handling large files and image compression. In addition, patient discomfort seems to be pronounced with sensors compared with PSP plates and film, the PSP plate may be scratched in clinical use and a two-layer barrier seems to be needed to prevent contamination of the receptor. The type of monitor may not be of major concern if the image is viewed in a room with subdued light. CONCLUSIONS Not all of the predicted advantages with digital compared to film-based radiography hold true in daily clinical work. Of particular interest is the relationship between number of images, retakes and the dose given to the patient.
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Affiliation(s)
- Ann Wenzel
- Department of Oral Radiology, School of Dentistry, Aarhus University, Vennelyst Boulevard, Aarhus, Denmark.
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Vandenberghe B, Jacobs R. The influence of tube potential on periodontal bone level measurements and subjective image quality using a digital photostimulable storage phosphor sensor. EJOURNAL OF ORAL MAXILLOFACIAL RESEARCH 2010; 1:e5. [PMID: 24421961 PMCID: PMC3886041 DOI: 10.5037/jomr.2010.1105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Accepted: 12/18/2009] [Indexed: 01/05/2023]
Abstract
Objectives The purpose of the present study was to determine
the measurement accuracy and subjective image quality for periodontal disease diagnosis
when using two X-ray tube voltages with a digital photostimulable storage phosphor
sensor. Material and Methods A digital photostimulable storage phosphor
(PSP) sensor (Vistascan) and a multipulse X-ray generator (Prostyle Intra) with
two tube voltages were used in this study. The front, premolar and molar region
of two adult human cadaver skulls jaws were imaged using the X-ray tube at 63 kV
and 70 kV, both at 8 mA and decreasing exposure times (160 ms, 120 ms and 80 ms).
A standardized exposure protocol containing waxed occlusal keys and an aiming device
ensured proper and reproducible beam alignment. Three observers assessed the digital
radiographs for 31 selected periodontal bone loss sites. Radiographic measurements
were compared to physical measurements (Standard). Subjective ratings of lamina
dura, crater defect and furcation involvement visibility, contrast perception
and bone quality were also performed. Results Multiple regression equation of the variables kV and
exposure time demonstrated no significant difference for the periodontal bone level
measurements (P > 0.05). In 90.3% and 96.7% of the measurements for 70 kV and 63
kV respectively, deviation was within 1 mm. The subjective ratings produced similar
findings in terms of image quality for both tube voltages and the three exposure
times. Conclusions The results of the present study revealed that tube
voltages of 63 kV and 70 kV provided similar accuracy and image quality for periodontal
disease diagnosis.
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Affiliation(s)
- Bart Vandenberghe
- Oral Imaging Center, Department of Dentistry, Oral Pathology and Maxillofacial Surgery, Faculty of Medicine, Catholic University of Leuven, Leuven Belgium
| | - Reinhilde Jacobs
- Oral Imaging Center, Department of Dentistry, Oral Pathology and Maxillofacial Surgery, Faculty of Medicine, Catholic University of Leuven, Leuven Belgium
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Affiliation(s)
- Brook A Niemiec
- Southern California Veterinary Dental Specialties, San Diego, CA 92111, USA.
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Grassl U, Schulze RKW. In vitro perception of low-contrast features in digital, film, and digitized dental radiographs: a receiver operating characteristic analysis. ACTA ACUST UNITED AC 2006; 103:694-701. [PMID: 17466887 DOI: 10.1016/j.tripleo.2006.04.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2005] [Revised: 04/07/2006] [Accepted: 04/11/2006] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To compare experimentally the image quality of charged-coupled device (CCD)-based digital, flatbed scanner digitized, and dental film radiographs. STUDY DESIGN High-contrast standardized radiographs of an aluminum step wedge containing boreholes were obtained on dental radiographic film (F) and a CCD receptor (D). Digitization (S) was done with a flatbed scanner. Each radiograph was separated into 23 single images, 18 of which showed a dark spot. Thirty observers indicated their confidence on the visibility of the spots for a receiver operating characteristic (ROC) analysis. RESULTS Mean Az values (area beneath the ROC curves) differed significantly (P < .05), being highest for D (Az = 0.76), followed by F (Az = 0.71) and S (Az = 0.60). Mean sensitivity of S (0.45) was significantly (P = .000) lower than for D (0.66) and F (0.67). CONCLUSION The difference between modality D and F was small. However, the inferior performance of S images, particularly in dark regions, could be clinically relevant.
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Affiliation(s)
- Ulrich Grassl
- Department of Oral Surgery and Radiology, Dental School of the University of Basel, Basel, Switzerland.
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