DMFR
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
This Article
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Kerosuo, E.
Right arrow Articles by Orstavik, D.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Kerosuo, E.
Right arrow Articles by Orstavik, D.

Dentomaxillofacial Radiology, Vol 26, Issue 2 79-84, Copyright © 1997 by British Institute of Radiology

ARTICLES

Application of computerised image analysis to monitoring endodontic therapy: reproducibility and comparison with visual assessment

E. Kerosuo and D. Orstavik
Department of Cariology, Institute of Dentistry, University of Helsinki, Finland.

OBJECTIVE: To evaluate the intra- and interexaminer reproducibility of computerised image analysis for the assessment of periapical bone changes based on gray value ratio when compared with a visual method. METHODS: 353 radiographs obtained in a clinical endodontic study were analysed. Densitometric analyses were used to evaluate changes in bone density following endodontic treatment. The diseased area of apical periodontitis' (AP) and 'normal bone area' (AN) were defined and ratios of the gray values (AP/AN) were calculated for each radiograph. Periapical index (PAI) was used as the 'gold standard'. Correlation coefficient (r), Kappa (kappa), and t-test for matched pairs were used for the statistics. RESULTS: The method proyed to be reproducible for intra-examiner re-examinations, r ranging from 0.7 to 0.84 (P < 0.01). Kappa showed fair to good agreement for data divided into four or three categories (kappa = 0.25-0.64). Dichotomised data showed fair to moderate agreement (kappa = 0.33-0.4) when the whole process was repeated, and good to very good agreement (kappa = 0.64-0.85) for the delineation process alone. The interexaminer comparisons showed fair to moderate agreement (kappa = 0.3-0.49). Comparison with PAI showed a 61% sensitivity and 79% specificity in detecting severe lesions (corresponding PAI scores 4 and 5) and the kappa value of 0.40 showed moderate agreement. The image analysis was sensitive enough to detect healing one month after treatment in a group of teeth with substantial lesions (P < 0.05). CONCLUSIONS: The computerised image analysis system seems to be an appropriate tool to detect the periapical bone changes in dental radiographs at a group level.


This article has been cited by other articles:


Home page
 Journal of the American Dental AssociationHome page
R. A. McDOUGAL, E. O. DELANO, D. CAPLAN, A. SIGURDSSON, and M. TROPE
Success of an alternative for interim management of irreversible pulpitis
J Am Dent Assoc, December 1, 2004; 135(12): 1707 - 1712.
[Abstract] [Full Text] [PDF]

Home page
 JBJSHome page
A. Pommer, G. Muhr, and A. Dávid
Hydroxyapatite-Coated Schanz Pins in External Fixators Used for Distraction Osteogenesis : A Randomized, Controlled Trial
J. Bone Joint Surg. Am., July 9, 2002; 84(7): 1162 - 1166.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
BJR DMFR IMAGING ALL BIR JOURNALS
Copyright © 1997 by the British Institute of Radiology.