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Evaluation of periapical changes following endodontic therapy: digital subtraction technique compared with
F B Carvalho1, M Gonçalves, J M Guerreiro-Tanomaru
1Department of Restorative Dentistry, São Paulo State University, UNESP, Araraquara, Brazil.
Dento Maxillo Facial Radiology
|September 22, 2009
Summary
Digital subtraction technique is more sensitive than morphometric analysis for evaluating periapical lesion changes after endodontic therapy. This method better detects bone changes, particularly new bone formation, in follow-up radiographs.
Area of Science:
- Endodontics
- Oral Radiology
- Dental Imaging Analysis
Background:
- Periapical lesions are common sequelae of endodontic treatment failure.
- Accurate evaluation of periapical lesion changes is crucial for assessing treatment success.
- Radiographic assessment methods require careful comparison for optimal clinical application.
Purpose of the Study:
- To compare the efficacy of digital subtraction technique and morphometric analysis in evaluating periapical lesion changes.
- To determine which method offers higher sensitivity in detecting radiographic alterations post-endodontic therapy.
Main Methods:
- 13 human anterior teeth with chronic periapical lesions were analyzed.
- Periapical radiographs were taken immediately and at 2, 4, and 6 months post-endodontic therapy.
- Digital subtraction images and morphometric area measurements were compared using agreement analysis.
Main Results:
- No significant correlation was found between the areas detected by digital subtraction and morphometric analysis (r = 0.02-0.45).
- Digital subtraction showed higher values for new bone formation, indicating increased sensitivity.
- Bone changes were most evident at the 2-month follow-up using digital subtraction.
Conclusions:
- Both digital subtraction and morphometric analysis are suitable for evaluating periapical lesion changes.
- The digital subtraction technique demonstrates superior sensitivity in detecting subtle radiographic periapical changes.
