OBJECTIVES. Diagnostic imaging is an essential component of dental and implant treatment planning. The aim of the present study is to evaluate digital panoramic X-ray magnification. Dental panoramic is widely used when planning a surgical treatment because it provides a good radiographic survey while imparting a low radiation dose. MATERIALS AND METHODS. 26 patients treated with a total of 104 implants were selected. A postoperative panoramic radiograph with constant magnification (1.25) was taken for every patient in both digital and analogue format. The implant real length was compared with the length measured through a sliding caliper with a rated accuracy of 0.001 and with the length measured through a Sidexis software product (Sirona Sidexis neXt Generation, Sirona Dental Systems Srl, Verona, Italy). The obtained measurements were compared with each other and with the real length. The statistical analysis was performed by evaluating the Concordance Correlation Coefficient (CCC), Lower and Upper Limit of Agreement (LLA, ULA) with a 95% confidence interval (95% CI). The agreement between printed and real measure and between digital and real measure was assessed using Bland-Altman plot with limits of agreement analyses in accordance with Lin's CCC estimation and its 95% bootstrap CI. RESULTS. The mean magnification distortion was calculated equal to 16.3% in the film-based radiography and equal to 0.01% in the digital radiography. Statistically, significant differences between maxilla and mandible implants and between their different sectors were not found. CONCLUSIONS. Although the panoramic dental X-ray is considered to be the basic exam for implant planning, its limits in measurement precision are universally acknowledged. This study demonstrates that a good measurement precision is possible on condition that the panoramic X-ray is performed with constant magnification and analyzed with specific software.
Ortopantomografia digitale con ingrandimento costante nella pianificazione del trattamento implantare
Bacci, C.;Frigo, A. C.;Stellini, E.
2017
Abstract
OBJECTIVES. Diagnostic imaging is an essential component of dental and implant treatment planning. The aim of the present study is to evaluate digital panoramic X-ray magnification. Dental panoramic is widely used when planning a surgical treatment because it provides a good radiographic survey while imparting a low radiation dose. MATERIALS AND METHODS. 26 patients treated with a total of 104 implants were selected. A postoperative panoramic radiograph with constant magnification (1.25) was taken for every patient in both digital and analogue format. The implant real length was compared with the length measured through a sliding caliper with a rated accuracy of 0.001 and with the length measured through a Sidexis software product (Sirona Sidexis neXt Generation, Sirona Dental Systems Srl, Verona, Italy). The obtained measurements were compared with each other and with the real length. The statistical analysis was performed by evaluating the Concordance Correlation Coefficient (CCC), Lower and Upper Limit of Agreement (LLA, ULA) with a 95% confidence interval (95% CI). The agreement between printed and real measure and between digital and real measure was assessed using Bland-Altman plot with limits of agreement analyses in accordance with Lin's CCC estimation and its 95% bootstrap CI. RESULTS. The mean magnification distortion was calculated equal to 16.3% in the film-based radiography and equal to 0.01% in the digital radiography. Statistically, significant differences between maxilla and mandible implants and between their different sectors were not found. CONCLUSIONS. Although the panoramic dental X-ray is considered to be the basic exam for implant planning, its limits in measurement precision are universally acknowledged. This study demonstrates that a good measurement precision is possible on condition that the panoramic X-ray is performed with constant magnification and analyzed with specific software.
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