title: Evaluation of simulated periodontal defects via various radiographic methods.
abstract: OBJECTIVE
  The aim of this study was to compare the diagnostic accuracy of conventional films and direct digital radiographs (DDR), in the determination of the depth and type of simulated periodontal intrabony defects.
  
  
  METHODS
  Three types of periodontal intrabony defects (one, two, and three walled) were artificially created in dry mandibles. Standard radiographic images were taken with Ultraspeed, Ektaspeed, Insight films, and DDR. The radiographic images were evaluated by three oral radiologists to identify the type and depth of these defects on the radiographs.
  
  
  RESULTS
  The average measured depth of the defects on the dry mandibles was 7.85 mm. The average depth of the type 1 defect on the radiographs was 7.19 mm, type 2 was 7.18 mm, and type 3 was 7.15 mm. The average depth of the defects via the Ultraspeed film was 7.15 mm, Ektaspeed film was 7.17 mm, Insight film was 7.19 mm, and DDR was 7.20 mm. Type 1, type 2, and type 3 defect depth measurements showed 8.9, 9.7, and 16.3% understated, respectively (p < 0.01). The accurate estimation rates of type 1, type 2, and type 3 defects were 93.8, 53, and 25.4%, respectively.
  
  
  CONCLUSIONS
  Both radiographic techniques have the same diagnostic value and display the minor destructive changes in the bone. As the number of osseous walls increases, it becomes difficult to determine the defect type and morphology. Further research is needed to monitor the intrabony defects, with less radiation exposure.
  
  
  CONCLUSIONS
  The accurate identification of defect type and depth depends on the number of walls, not the imaging methods.
authors: Faculty of Dentistry, Department of Oral and Maxillofacial Radiology (Oral Diagnosis and Radiology), Ondokuz Mayis University, Atakum, 55139, Samsun, Turkey. dtzeynep78@yahoo.com.tr.
authors: Ayse Zeynep
authors: AZ
authors: Zengin
authors: Faculty of Dentistry, Department of Oral and Maxillofacial Radiology (Oral Diagnosis and Radiology), Ondokuz Mayis University, Atakum, 55139, Samsun, Turkey.
authors: Pinar
authors: P
authors: Sumer
authors: Faculty of Dentistry, Department of Oral and Maxillofacial Radiology (Oral Diagnosis and Radiology), Ondokuz Mayis University, Atakum, 55139, Samsun, Turkey.
authors: Peruze
authors: P
authors: Celenk
mesh_terms: D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging*; D010510:Periodontal Diseases / Q000000981:diagnostic imaging*; D011237:Predictive Value of Tests; D019252:Radiography, Dental, Digital / Q000295:instrumentation / Q000379:methods*
keywords: Alveolar bone loss; Digital radiography; Film; Periodontium