Abstract
The aim of this study was to determine the efficacy of pixel value analysis using images generated by the Digora™ and Visualix™ systems for the early detection of external root resorption (ERR). Thirty extracted human lower incisors were radiographed using the Digora and Visualix systems; then, ERR was induced by immersing the teeth in 6 mol L-1 of hydrochloric acid for different periods of time (10, 30 and 60 minutes). ERR was confirmed by calcium quantification with an atomic absorption spectrophotometer. One digital image was acquired per time period at 70 kVp, 7 mA, 2.2 mm filtration, focus-film distance of 30 cm, and with exposure times of 0.09 s in the Digora system and 0.05 s in Visualix system. The region of interest was defined using ImageJ software. Statistical analysis was performed using ANOVA and Pearson's correlation (p < 0.05). There was no statistically significant difference between the time for ERR induction and the pixel values with either system. A positive correlation between the time of ERR induction and the calcium concentration was observed (r = 0.8892; p < 0.001). In conclusion, independent of the site of ERR induction and the digital system, pixel value analysis was not effective for ERR detection.
Highlights
And accurate detection of external root resorption (ERR) during orthodontic treatment is essential to identify teeth at risk of severe resorption.[1,2] Early detection of ERR allows orthodontic treatment plans to be modified to minimize or prevent continued loss of root structure.[1,2] Periapical radiographic imaging, either conventional or digital, is usually the method of choice for detection of apical ERR,[3,4,5] despite reports that cone beam computed tomography (CBCT) is more reliable than intraoral radiography.[2,6] there are differences between the techniques
In the case of digital images, the sensor is triggered by the same rays as those used for conventional imaging, but the processing is performed by means of digital scanning
Because the sensors used in dental radiology exhibit high sensitivity to x-rays, lower doses of radiation than those used in the conventional technique may be used
Summary
And accurate detection of external root resorption (ERR) during orthodontic treatment is essential to identify teeth at risk of severe resorption.[1,2] Early detection of ERR allows orthodontic treatment plans to be modified to minimize or prevent continued loss of root structure.[1,2] Periapical radiographic imaging, either conventional or digital, is usually the method of choice for detection of apical ERR,[3,4,5] despite reports that cone beam computed tomography (CBCT) is more reliable than intraoral radiography.[2,6] there are differences between the techniques. Conventional radiographic images are acquired by the exposure of silver crystals in an emulsion to light, followed by chemical processing. In the case of digital images, the sensor is triggered by the same rays as those used for conventional imaging, but the processing is performed by means of digital scanning. Because the sensors used in dental radiology exhibit high sensitivity to x-rays, lower doses of radiation than those used in the conventional technique may be used.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
