[Show abstract][Hide abstract] ABSTRACT: The location and configuration of the mandibular canal are important in imaging diagnosis for mandibular posterior dental implant treatment. The purpose of the present investigation was to clarify the relationship between the depiction of the mandibular canal in digital panoramic images and cancellous bone density assessed using multislice computed tomographic images.
Twenty-three patients, all with a designed dental implant in the mandibular molar region, were enrolled in the investigation. Depiction of the mandibular canal was classified into 3 types using digital panoramic images. Rectangular regions of interest were set in cancellous bone of designed implant sites and averaged pixel values of regions of interest were calculated.
The mean pixel value in the site of the mandibular canal visible in the superior and inferior walls was significantly larger in comparison with that invisible in the superior and inferior walls.
The depiction of the mandibular canal in digital panoramic images was related to bone density in the alveolar region.
No preview · Article · May 2009 · Implant dentistry
[Show abstract][Hide abstract] ABSTRACT: The aim of this study was to compare several values for consistency obtained by charged-coupled-device-based direct digital intraoral radiography with those obtained by conventional film-based radiography to evaluate observer agreement in determining the depth of proximal caries.
A total of 93 proximal surfaces on radiologic images that were obtained by both the conventional film-based bite-wing technique and by direct digital intraoral radiography were evaluated by six observers. One of these observers also evaluated the same images six months after the initial evaluation. The kappa value, consistency ratio, agreement ratio, and Kendall's correlation coefficient were calculated for interobserver and intraobserver agreement.
The overall kappa values for interobserver agreement were 0.439 and 0.424 in the direct digital system and the film-based radiography, respectively. The depth-related change of the values showed similar patterns in the two modalities for both interobserver and intraobserver agreement.
The digital intraoral system resulted in no deterioration in observer agreement, and it presents no problems for clinical use with respect to the reliability of diagnosis.
No preview · Article · Feb 1998 · Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology