title: High-resolution CT of transplanted teeth: imaging technique and measurement accuracy.
abstract: The aim of this study was to determine the accuracy of crown diameter measurements by dental CT as a tool for preoperative diagnosis before tooth transplantations. Fifty-eight patients underwent clinically indicated dental CT. The diameter of the crowns were measured by CT using a standard protocol (1.5-mm slice thickness, 1-mm table feed, 120 kV, 25-75 mA/s, 2-s scan time/slice, 512 matrix) and a standard dental software package. Postoperatively, the same distances were clinically measured using a sliding gauge. The degree of the deviation between CT measurements and clinical measurements was in the sub-millimeter range. According to the regression analysis, the correlation coefficient equals 0.98 and 0.97, indicating a strong relationship between the CT and the manual measurement of the crown diameter in the bucco-lingual and the mesio-distal direction. The mean deviation of CT measurements with regard to the bucco-lingual diameter of the crown was +0.08 mm (SD: +/-0.38 mm). For the mesio-distal diameter, the mean deviation of CT measurements was -0.24 mm (SD: +/-0.53 mm). These results demonstrate that dental CT promises to be a valuable tool for the evaluation of the potential and optimal size and site for tooth transplantations.
authors.affiliation: Department of Radiology/Osteology and MR, Medical University of Vienna, Vienna, Austria. andre.gahleitner@meduniwien.ac.at
authors.forename: André
authors.initials: A
authors.lastname: Gahleitner
authors.forename: Ulrike
authors.initials: U
authors.lastname: Kuchler
authors.forename: Peter
authors.initials: P
authors.lastname: Homolka
authors.forename: Janina
authors.initials: J
authors.lastname: Heschl
authors.forename: Georg
authors.initials: G
authors.lastname: Watzek
authors.forename: Herwig
authors.initials: H
authors.lastname: Imhof
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D008297:Male; D008964:Molar, Third / Q000000981:diagnostic imaging* / Q000637:transplantation*; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D011861:Radiography, Dental / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*; D019228:Tooth Crown / Q000000981:diagnostic imaging*; D014090:Tooth Replantation / Q000379:methods*; D055815:Young Adult