Radiographic parameters: biological significance and clinical use

Brägger, Urs

doi:10.1111/j.1600-0757.2005.00128.x

Cited by 80 publications

(74 citation statements)

References 149 publications

(182 reference statements)

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“…Although there may be some confusion on what the clinically acceptable deviation for bone loss measurements may be, it has been reported that 0.5 to 1 mm deviation should be accomplished when using a correct standardized radiographic set-up [1][2][3]. When considering a 1 mm deviation, 90.3% and 96.8% of the measurements in this study for respectively 70 and 63 kV fell within this range, which is similar to other studies [15][16][17].…”

Section: Discussionsupporting

confidence: 81%

“…Intraoral radiographs are often a necessary adjunct in the diagnosis of periodontal diseases regarding extent estimation of alveolar bone loss and visualization of important structures like periodontal ligament space, lamina dura or trabecular pattern [1][2][3]. However, the outcome of this radiographic evaluation is not only depending on exposure parameters but also on image sensor type and viewing conditions [4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Tube Potential on Periodontal Bone Level Measurements and Subjective Image Quality Using a Digital Photostimulable Storage Phosphor Sensor

Vandenberghe¹

2010

JOMR

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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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Section: Discussionsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

The Influence of Tube Potential on Periodontal Bone Level Measurements and Subjective Image Quality Using a Digital Photostimulable Storage Phosphor Sensor

Vandenberghe¹

2010

JOMR

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“…1,2 However, the methods suffer from the inherent drawbacks of plain radiographs, such as magnification, distortion and superimposition of adjacent anatomical structures. [2][3][4] These drawbacks often limit the usefulness of these radiographs. 1 CBCT is a recently developed imaging technique that can provide three-dimensional (3D) images similar to spiral CT images but gives a relatively low radiation dose to patients and a relatively high-quality image of the hard tissue.…”

Section: Introductionmentioning

confidence: 99%

A six-site method for the evaluation of periodontal bone loss in cone-beam CT images

Guo

et al. 2016

Dentomaxillofacial Radiology

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Objectives: In contrast to two-dimensional planar images, a measuring point is hardly repeatedly determined in a CBCT image when alveolar bone loss is assessed. Thus, the aim of the present study was to propose a six-site measuring method, which is closely related to anatomical structure, for the evaluation of alveolar bone loss in CBCT images. Methods: 150 measuring points in 11 molars and 14 premolars from 6 patients (2 males and 4 females) were included. CBCT images of the teeth were acquired prior to periodontal surgery. Four observers measured the distances between cemento-enamel junctions and the apical bases of the periodontal bone defect at the mesio-buccal, mid-buccal, disto-buccal, mesio-lingual/palatal, mid-lingual/palatal and disto-lingual/palatal sites in CBCT images. Direct measurements of the six sites were correspondingly obtained in the subsequent periodontal surgeries. Differences between the distances measured in the CBCT images and during the surgery were analysed. Interobserver and intraobserver variances were tested. Results: No statistically significant difference was found between the surgical and CBCT measurements (p 5 0.84). Diagnostic coincidence rates of four observers were 86.7%, 87.3%, 88.7% and 88.0%, respectively. The interobserver (p 5 0.95) and intraobserver (p 5 0.30) variances were not significant. Conclusions: The six-site measuring method validated in the present study may be a useful three-dimensional measuring method for the evaluation of periodontal disease.

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“…Each film usually shows two to four teeth and provides detailed information about the teeth and the surrounding alveolar bone (Whaites E 2002). At routine clinical use; the two intraoral radiographic techniques used were the bisecting angle technique and the paralleling techniques (Bragger U 2005).Periapical radiography in practice is not as easy as it appears in theory. A thorough theoretical knowledge helps clinicians in modifying techniques to suit individual patient criteria, since the anatomy of the mouth does not allow rules of geometric projections to be satisfied.…”

Section: Discussionmentioning

confidence: 99%

Comparison between the commonly used radiographic techniques for intra oral imaging in dentistry-A questionnaire study

Tatapudi

Swathi²,

Upendra

et al. 2017

IJDR

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Aim:-To compare the opinion regarding usage of bisecting-angle technique and the paralleling techniques among BDS students, post graduate students, private practitioners in and around Bhimavaram town for intra oral imaging in dentistry. Materials and methods: A detailed questionnaire composed of questions regarding technical parameters, exposure parameters, operator and patient comfort and image accuracy in diagnosis. Details of the study were explained to the participants preferred option to be marked according to the question mentioned in the questionnaire. Total 500 individuals participated in the present study, with 100 individuals in each group. Data was collected and entered in Microsoft Excel (2010) and statistically analysed using SPSS 20. Chisquare test was used to evaluate differences in the responses with P-value ≤ 0.05 were considered significant. Results: Results showed that in technical parameters most of the people opted for bisecting angle technique with p value≤ 0.05 and found as significant. In aspect of exposure parameters, results are in favour of paralleling technique and p value is ≤ 0.05. In aspect of the operator and patient comfort there is an equal opinion most of them opted for bisecting angle technique and paralleling technique p value is significant. In aspect of image accuracy p value is significant for paralleling technique. Conclusion: Great work should have to be done to alleviate the quality of radiographs and the understanding and perspective of dental graduates regarding dental and maxillo-facial radiology. The results of present study revealed though there is knowledge about the techniques, but lack of application decreases their ability to get more accurate diagnostic radiograph. Paralleling technique being the most accurate in image accuracy should be emphasized to practice and needed to be modified in conditions where it is not feasible to deal with.

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Radiographic parameters: biological significance and clinical use

Cited by 80 publications

References 149 publications

The Influence of Tube Potential on Periodontal Bone Level Measurements and Subjective Image Quality Using a Digital Photostimulable Storage Phosphor Sensor

The Influence of Tube Potential on Periodontal Bone Level Measurements and Subjective Image Quality Using a Digital Photostimulable Storage Phosphor Sensor

A six-site method for the evaluation of periodontal bone loss in cone-beam CT images

Comparison between the commonly used radiographic techniques for intra oral imaging in dentistry-A questionnaire study

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