A comparison between bitewing radiographs taken with rectangular and circular collimators in UK military dental practices: a retrospective study

Parrott, Les; Ng, Suk Yee

doi:10.1259/dmfr/86968802

Cited by 20 publications

(17 citation statements)

References 24 publications

(22 reference statements)

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“…By replacing round collimation with rectangular collimation, the effective dose would be reduced by almost 60% 32. Rectangular collimation did not significantly affect the diagnostic yield of radiographs despite the increase in minor cone cuts 33. The present study showed that 14.6% of Korean dentists used rectangular collimation.…”

Section: Discussioncontrasting

confidence: 44%

Attitude of the Korean dentists towards radiation safety and selection criteria

Lee

Ludlow

2013

Imaging Sci Dent

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PurposeX-ray exposure should be clinically justified and each exposure should be expected to give patients benefits. Since dental radiographic examination is one of the most frequent radiological procedures, radiation hazard becomes an important public health concern. The purpose of this study was to investigate the attitude of Korean dentists about radiation safety and use of criteria for selecting the frequency and type of radiographic examinations.Materials and MethodsThe study included 267 Korean dentists. Five questions related to radiation safety were asked of each of them. These questions were about factors associated with radiation protection of patients and operators including the use of radiographic selection criteria for intraoral radiographic procedures.ResultsThe frequency of prescription of routine radiographic examination (an example is a panoramic radiograph for screening process for occult disease) was 34.1%, while that of selective radiography was 64.0%. Dentists' discussion of radiation risk and benefit with patients was infrequent. More than half of the operators held the image receptor by themselves during intraoral radiographic examinations. Lead apron/thyroid collars for patient protection were used by fewer than 22% of dental offices. Rectangular collimation was utilized by fewer than 15% of dental offices.ConclusionThe majority of Korean dentists in the study did not practice radiation protection procedures which would be required to minimize exposure to unnecessary radiation for patients and dental professionals. Mandatory continuing professional education in radiation safety and development of Korean radiographic selection criteria is recommended.

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Section: Discussioncontrasting

confidence: 44%

Attitude of the Korean dentists towards radiation safety and selection criteria

Lee

Ludlow

2013

Imaging Sci Dent

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“…18,19 Accuracy of the detection of proximal enamel caries lesions using three intraoral storage phosphor plate digital systems (DenOptix, Gendex Dental Systems) and Digora FMX with white and blue plates (Soredex, Helsinki, Finland) has been compared to that of Insight film. 20 There was no significant difference in the diagnostic accuracy among Insight film and the Digora and DenOptix digital systems for proximal enamel caries. The increase in depth of damage to the enamel layer by the carious lesion did not result in the increase in the number of surfaces correctly identified by the radiographic systems.…”

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confidence: 81%

“…The increase in depth of damage to the enamel layer by the carious lesion did not result in the increase in the number of surfaces correctly identified by the radiographic systems. 20 In our study, only Insight film was used for intraoral bitewing radiographs as we were mainly interested in comparing extraoral and intraoral bitewing images for proximal caries diagnosis. Film is still the major image receptor for obtaining bitewing radiography at most facilities due to rapid work flow.…”

mentioning

confidence: 99%

“…20 The use of film holders with circular collimation significantly reduced the incidence of cone cut errors from 21.7% to 3.3%. There was an increase in the incidence of cone cut errors from 3.3% to 20.9% when rectangular collimation was used, but the actual number that were considered ''rejects'' was very small, only 0.1-0.3%, when assessed for diagnostic yield.…”

mentioning

confidence: 99%

“…Therefore, the authors suggested that all practitioners should adopt rectangular collimation, and there is little justification for the continued use of circular collimation with film holding devices when taking bitewing projections. 20 Also, rectangular collimation reduces scatter and therefore improves image quality. However, in the present research, an X-ray unit with a circular collimator was preferred since this is the most available unit at our clinic and radiation dose was not an issue in this ex vivo study.…”

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confidence: 99%

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Proximal caries detection accuracy using intraoral bitewing radiography, extraoral bitewing radiography and panoramic radiography

Kamburoğlu¹,

Kolsuz²,

Murat³

et al. 2012

Dentomaxillofacial Radiology

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Objective: To compare proximal caries detection using intraoral bitewing, extraoral bitewing and panoramic radiography. Methods: 80 extracted human premolar and molar teeth with and without proximal caries were used. Intraoral radiographs were taken with Kodak Insight film (Eastman Kodak Co., Rochester, NY) using the bitewing technique. Extraoral bitewing and panoramic images were obtained using a Planmeca Promax Digital Panoramic X-ray unit (Planmeca Inc., Helsinki, Finland). Images were evaluated by three observers twice. In total, 160 proximal surfaces were assessed. Intra-and interobserver kappa coefficients were calculated. Scores obtained from the three techniques were compared with the histological gold standard using receiver operating characteristic analysis. Az values for each image type, observer and reading were compared using z-tests, with a significance level of a 5 0.05. Results: Kappa coefficients ranged from 0.883 to 0.963 for the intraoral bitewing, from 0.715 to 0.893 for the extraoral bitewing, and from 0.659 to 0.884 for the panoramic radiography. Interobserver agreements for the first and second readings for the intraoral bitewing images were between 0.717 and 0.780, the extraoral bitewing readings were between 0.569 and 0.707, and the panoramic images were between 0.477 and 0.740. The Az values for both readings of all three observers were highest for the intraoral bitewing. Az values for the extraoral bitewing images were higher than those of the panoramic images without statistical significance (p . 0.05). Conclusion: Intraoral bitewing radiography was superior to extraoral bitewing and panoramic radiography in diagnosing proximal caries of premolar and molar teeth ex vivo. Similar intra-and interobserver coefficients were calculated for extraoral bitewing and panoramic radiography.

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