|Baltic Dental and Maxillofacial Journal|
September, 2008, Vol. 10, No. 4
A 2-year follow-up study on standard length implants inserted into alveolar bone sites augmented with homografts
Veneer fracture in implant-supported metal-ceramic restorations. Part I: Overall success rate and impact of occlusal guidance
CLINICAL CASE REPORTS
© 2008 Stomatologija
Stomatologija 2008; 10 (4): 115-120 106 KB
Detection of proximal caries in conventional and digital radiographs: an in vitro study
Maria Ivete Rockenbach, Elaine Bauer Veeck, Nilza Pereira da Costa
Objectives. To compare digital images to conventional film radiography in the diagnosis of proximal caries.
Methods. Fifty-one molars and 24 premolars were studied and divided in groups of three teeth. They were fixed in silicone and radiographed using InSight film (Kodak) and the digital systems Digora (Soredex), DenOptix (Gendex) and CygnusRay MPS (Progeny). Twenty-five radiographs were obtained in each modality and four proximal surfaces were analyzed in each radiograph. Radiographs were interpreted individually by one observer at three different sessions for each imaging modality. Caries lesions were classified according to their depth: (0) absent; (1) restricted to enamel; (2) reaching the dentino-enamel junction; and (3) reaching the dentin. The teeth were sectioned and ground in order to obtain the gold standard and were examined histologically by stereomicroscopy.
Results. The Kendall test was employed and showed a good intra-observer agreement among the three evaluations implemented. The sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were all calculated, and there were no significant differences observed among the four imaging modalities studied (ANOVA, p≤0.05). Besides, the ROC curve was determined for each modality and no statistically significant differences were observed when comparing the areas under the ROC curve at the 5% level of significance.
Conclusions. The results demonstrate that the diagnostic accuracy of digital images is similar to that of conventional film radiography in the detection of proximal caries.
Key words: dental caries; radiography; diagnostic imaging; microscopy.
Received: 27 11 2007
Accepted for publishing: 19 12 2008
*Department of Oral Surgery, Dental School, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
Maria Ivete Rockenbach* DDS, PhD
Elaine Bauer Veeck* DDS, PhD
Nilza Pereira da Costa* DDS, PhD
Address correspondence to Dr.Maria Ivete Rockenbach, Faculdade de Odontologia PUCRS, Avenida Ipiranga, 6681 Predio 6, 90619-900 Porto Alegre, RS Brazil.
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