Quantitative analysis of errors in alveolar crest level caused by discrepant projection geometry in digital subtraction radiography: an in vivo study.
OBJECTIVE
This study compared the difference between 3 intraoral radiographic techniques on digital subtraction radiography (DSR) in vivo that are commonly used in a clinical setting.


METHODS
We evaluated and statistically analyzed the errors in the DSR image in 6 regions with 3 radiographic techniques: paralleling technique with a bite block attached to XCP, paralleling technique using XCP, and bisecting-angle technique.


RESULTS
The amount of error using the bisecting-angle technique was too large for DSR, compared to that of the paralleling technique with a bite block attached to XCP. In the mandibular anterior region, the paralleling technique using XCP was not different from paralleling technique with a bite block attached to XCP. The lowest degree of error was present in the anterior region whereas the highest was present in the molar region.


CONCLUSIONS
Bisecting-angle technique should be avoided, and paralleling technique using XCP can be used in the mandibular anterior region for DSR.
Huh
Kyung-Hoe
KH
Department of Oral and Maxillofacial Radiology, BK21, and Dental Research Institute, College of Dentistry, Seoul National University, Seoul, Korea.
Lee
Sam-Sun
SS
Jeon
In-Seong
IS
Yi
Won-Jin
WJ
Heo
Min-Suk
MS
Choi
Soon-Chul
SC
D000328:Adult; D000465:Algorithms; D000539:Alveolar Process / Q000000981:diagnostic imaging*; D003951:Diagnostic Errors; D006801:Humans; D007091:Image Processing, Computer-Assisted; D019252:Radiography, Dental, Digital / Q000295:instrumentation / Q000379:methods*; D015203:Reproducibility of Results; D013382:Subtraction Technique