Effect of various digital processing algorithms on the measurement accuracy of endodontic file length

Kal, Betül İlhan; Baksı, B. Güniz; Dündar, Nesrin; Şen, Bilge Hakan

doi:10.1016/j.tripleo.2006.06.001

Cited by 38 publications

(33 citation statements)

References 24 publications

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“…The present study found no significant difference between endodontic file lengths measured in original and positive CMOS images, although both of them have differed from the actual lengths. The present findings agree with those of a previous study that compared the validity of gray scale inversion, with regard to the measurement of endodontic file lengths using Digora storage phosphor plate images (6). Effects of gray scale inversion have also been evaluated in the examination of the periodontium.…”

Section: Discussionsupporting

confidence: 91%

“…Studies determining file lengths in the root canal have been performed previously (6,7,14,16). This measurement does not address the exact clinical procedure during an endodontic treatment.…”

Section: Discussionmentioning

confidence: 99%

“…Importantly, caution is needed in detecting anatomical variation of the root apex because it influences on canal instrumentation (5). It is believed that digital measurement is more accurate than measuring with an endodontic ruler on a radiograph, and increases the chance of a successful endodontic treatment (6).…”

Section: Introductionmentioning

confidence: 99%

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Gray scale inversion in digital image for measurement of tooth length

et al. 2012

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The aim of this study was to assess the applicability of gray scale inversion in performing digital linear endodontic measurements. Standardized digital images were taken of 40 extracted human permanent single-rooted teeth with K-files size 15 placed at different lengths in the root canal, using the CDR Wireless ® digital system. All images were treated with Positive, a digital tool that inverts the grayscale value. Eight radiologists measured the distance between the lower limit of the rubber stop and the tip of the file on both original and positive images. After 15 days, they repeated this procedure in 50% of the image samples. The intra-and inter-examiner agreement was analyzed by intraclass correlation test, and the comparison between the two image groups and the actual lengths by the Student's t-test (α=0.05). Intra-and inter-examiner evaluation showed high reproducibility (r>0.95) of both original and positive images. No statistically significant differences (p>0.05) were found between measurements performed on original and positive images, but both differed significantly from the actual lengths (p<0.05). Gray scale inversion has low applicability in measuring endodontic files, since it did not improve the accuracy of measurements.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

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Gray scale inversion in digital image for measurement of tooth length

et al. 2012

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“…This is possible by displaying information that has been collected during imaging but is not visible 19. Although processing should be able to improve diagnostic signals, some of the information might be lost during the process 18,19,23,31. Therefore, digital enhancement should be used with caution, based on the diagnostic task.…”

Section: Discussionmentioning

confidence: 99%

Effect of digital noise reduction on the accuracy of endodontic file length determination

et al. 2013

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PurposeThe aim of the present study was to evaluate the measurement accuracy of endodontic file length on periapical digital radiography after application of noise reduction digital enhancement.Materials and MethodsThirty-five human single-rooted permanent teeth with canals measuring 20-24 mm in length were selected. ISO #08 endodontic files were placed in the root canals of the teeth. The file lengths were measured with a digital caliper as the standard value. Standard periapical digital images were obtained using the Digora digital radiographic system and a dental X-ray unit. In order to produce the enhanced images, the noise reduction option was applied. Two blinded radiologists measured the file lengths on the original and enhanced images. The measurements were compared by repeated measures ANOVA and the Bonferroni test (α=0.05).ResultsBoth the original and enhanced digital images provided significantly longer measurements compared with the standard value (P<0.05). There were no significant differences between the measurement accuracy of the original and enhanced images (P>0.05).ConclusionNoise reduction digital enhancement did not influence the measurement accuracy of the length of the thin endodontic files on the digital periapical radiographs despite the fact that noise reduction could result in the elimination of fine details of the images.

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“…This result is not surprising since similar results have been previously demonstrated for different dental tasks, such as caries and endodontic fi le tip detection as well as fi le length measurements. [13][14][15] In the present study, the enhancement was applied as originally provided by the software by only one observer to avoid adverse effects of the variety of observer experiences and individual image preferences in digital radiography. The use of only one type of enhanced image provided an equal chance of comparable performance by all observers.…”

Section: Discussionmentioning

confidence: 99%

Measurement accuracy and perceived quality of imaging systems for the evaluation of periodontal structures

Baksı

2008

Odontology

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The aim of this study was to compare the subjective diagnostic quality of F-speed film images and original and enhanced storage phosphor plate (SPP) digital images for the visualization of periodontal ligament space (PLS) and periapical (PB) and alveolar crestal bone (CB) and to assess the accuracy of these image modalities for the measurement of alveolar bone levels. Standardized images of six dried mandibles were obtained with film and Digora SPPs. Six evaluators rated the visibility of anatomical structures using a three-point scale. Alveolar bone levels were measured from the coronal-most tip of the marginal bone to a reference point. Results were compared by using Friedman and Wilcoxon signed-ranks tests. The kappa (kappa) statistic was used to measure agreement among observers. The measurements were compared using repeated measures analysis of variance and Bonferroni tests (P = 0.05). A paired t test was used for comparison with true bone levels (P = 0.05). Enhanced SPP images were rated superior, followed by film and then the original SPP images, for the evaluation of anatomical structures. The value of kappa rose from fair to substantial after the enhancement of the SPP images. Film and enhanced SPP images provided alveolar bone lengths close to the true bone lengths. Enhancement of digital images provided better visibility and resulted in comparable accuracy to film images for the evaluation of periodontal structures.

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Effect of various digital processing algorithms on the measurement accuracy of endodontic file length

Cited by 38 publications

References 24 publications

Gray scale inversion in digital image for measurement of tooth length

Gray scale inversion in digital image for measurement of tooth length

Effect of digital noise reduction on the accuracy of endodontic file length determination

Measurement accuracy and perceived quality of imaging systems for the evaluation of periodontal structures

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