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International Poster Journal of Dentistry and Oral Medicine



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Int Poster J Dent Oral Med 3 (2001), No. 1     15. Mar. 2001
Int Poster J Dent Oral Med 3 (2001), No. 1  (15.03.2001)

Poster 60, Language: English

Intrasurgical and computer-assisted radiographic measurement of interproximal bone loss: A comparison of 2 methods
Eickholz, Peter/Kim, Ti-Sun/Hausmann, Ernest
The aim of the present study was to compare computer-assisted linear measurements of interproximal intrabony defects on radiographs using two different methods with the gold standard of intrasurgical measurements. In 22 patients with untreated advanced periodontal disease, 33 standardized radiographs were taken presurgically. The horizontal and vertical angulation difference of the central beam from the orthoradial projection and radiographic magnification were calculated for each radiograph. At the time of surgery, for 34 interproximal intrabony defects, the distance from the cemento-enamel junction (CEJ) to the bottom of the bony defect (BD) was measured. The distance CEJ to BD was assessed on the radiographs by two examiners that were blinded for the clinical parameters each using a different computer-assisted system (TSK: method 1; EH: method 2). Both radiographic evaluation methods underestimated interproximal bone loss statistically significantly [method 1: 0.70 ± 2.31 mm (p=0.006); method 2: 1.41 ± 2.58 mm (p=0.003)]. The difference in underestimation of bone loss between method 1 and 2 (0.71 ± 2.31 mm) failed to reveal statistically significance (p>0.05). A multivariate analysis confirmed this observation and failed to show any influence of projection geometry on underestimation of bone loss. Both computer-assisted methods used to measure interproximal bone loss on radiographs in this study underestimated the amount of bone loss statistically significantly.

Keywords: computer-assisted radiograhic analysis, intrabony defects, periodontal diagnosis, linear measurements

78th General Session & Exhibition of the International Association for Dental Research (IADR)
Washington DC, USA