Dosimetry of Occupational Radiation around Panoramic X-ray Apparatus

Abstract

Background:Panoramic imaging is one of the most common imaging methods in dentistry. Regarding the side-effects of ionizing radiation, it is necessary to survey different aspects and details of panoramic imaging. In this study, we compared the absorbed x-ray dose around two panoramic x-ray units: PM 2002 CC Proline (Planmeca, Helsinki, Finland) and Cranex Tome (Soredex, Helsinki, Finland). Materials and Methods: In this cross-sectional study, 15 thermoluminescet dosemeters (TLD-100) were placed in 3 semi-circles of 40cm, 80cm and 120cm radii in order to estimate x-ray dose. Around each unit, the number of TLDs in each semi-circle was 5 with equal intervals. The center of semicircles accords with the patient’s position. Each TLD was exposed 40 times. These dosemeters were read out with a Harshaw Model 4000 TLD Reader (USA). The calibration processing and the reading of dosemeters were performed by the Atomic Energy Organization of Iran. Results:The mean absorbed dose in three lines of PM 2002 CC Proline was 123.2±15.1, 118.0±11.0 and 108.0±9.1 µSv, (p=0.013). The results were 140.4±15.2, 120.2±10.4 and 111.6±11.2 µSv in Cranex Tome (p=0.208), which reveals no significant difference between two systems. Conclusion:There are no significant differences between the mean absorbed dose of surveyed models in panoramic imaging by two units (PM 2002 CC Proline and Cranex Tome). These results were less than occupational exposure recommended by ICRP, even at the highest calculated doses.

MR-orthopantomography in operative dentistry and oral and maxillofacial surgery: a proof of concept study

“…It enables the radiological assessment of various anatomical structures and pathological conditions in operative dentistry and oral and maxillofacial surgery. OPG, which captures the dento-maxillofacial complex in a single image with a relatively short exposure time and radiation dose (4–30 μSv) 1 , is increasingly being performed to complement the clinical examination for the initial assessment of the patient’s overall dental condition and facial skeleton, diagnosis of possible dental and temporomandibular joint disease or traumatic injury, and planning of third molar surgery, implant therapy, and orthodontic procedures 2 – 4 . Given the excellent hard tissue contrast of conventional radiographic OPGs and the wide range of diagnostic indications, OPGs have become an integral part of dental education and are considered the most familiar imaging technique in daily dental practice 5 .…”

Imaging in Third Molar Surgery: A Clinical Update

“…In most cases, an OPG, a widely used extraoral two-dimensional dental radiograph, is routinely obtained during the initial examination of a symptomatic patient prior to third molar surgery. It provides a comprehensive panoramic view of the oral cavity and adjacent structures with a relatively short exposure time and dose (4-30 µSv) [24]. It is considered a valuable tool for assessing several critical factors relevant to the surgical site, such as root number, shape, curvature, root resorption, positional relationships, angulation to adjacent teeth, proximity to vital structures such as the mandibular canal or maxillary sinus, and the presence of additional pathology [25].…”

Unexpected metallic foreign bodies on panoramic scans – a narrative review

“…Auch aus diesem Grund sind für den klinisch tätigen Radiologen fundierte Kenntnisse im Bereich des zahnärztlichen Röntgens notwendig 3 . Unter den Röntgenaufnahmen ist bei den Zahnärzten, Oralchirurgen, Kieferorthopäden und Fachärzten für Mund-, Kiefer- und Gesichtschirurgie das OPG als Standardröntgenaufnahme zu bezeichnen 4 .…”

“…For this reason, profound of dental imaging is essential for clinical radiologists [3]. Panoramic radiography is considered the standard imaging technique among dentists, oral surgeons, orthodontists, and oral and maxillofacial surgeons [4].…”