The aims of this study were to assess the accuracy linear measurements on three-dimensional (3D) surface-rendered images generated from cone beam computed tomography (CBCT) in comparison with two-dimensional (2D) slices and 2D lateral postero-anterior (PA) cephalometric projections, investigate influence patient head position scanner measurement accuracy. Eight dry human skulls scanned twice using NewTom 3G CBCT an ideal a rotated resulting datasets used create 3D images, tomographic slices,...

Objectives: To assess the location, morphology and dimensions of nasopalatine canal on two-dimensional three-dimensional (2D 3D) CT images. Methods: Material included 34 spiral scans for pre-operative planning implant placement in maxilla. Scanning was performed using a standard exposure patient positioning protocol. 2D 3D images were carefully examined by two independent observers. A comparison made between observations 2D/3D combined observation strategy (paired t-tests). Results: The...

OBJECTIVES To compare the diagnostic accuracy for detection of approximal caries two dental X-ray films, CCD-based digital systems and storage phosphor (SP) systems. METHODS Fifty-six surfaces in 56 extracted unrestored premolars were radiographed under standardised conditions using E-speed film, Ektaspeed Plus (Eastman Kodak Co, Rochester, NY, USA) Dentus M2 Comfort (Agfa-Gevaert, Mortsel, Belgium), CCD systems, Sidexis (Sirona, Bensheim, Germany) Visualix (Gendex, Milan, Italy) SP Digora...

To measure patient radiation dose during panoramic exposure with various units for digital imaging.An anthropomorphic phantom was filled thermoluminescent dosemeters (TLD 100) and exposed five different ten consecutive exposures. Four machines were equipped a direct CCD (charge coupled device) system, whereas one of the used storage phosphor plates (indirect technique). The settings recommended by manufacturers particular image size used: tube potential ranged between 64 kV 74 kV, times 8.2...

This report aims to describe the development of age-specific phantoms for use in paediatric dentomaxillofacial radiology research. These are denoted DIMITRA skull as these have been primarily developed and validated European research project (Dentomaxillofacial imaging: an investigation towards low-dose radiation induced risks).To create phantoms, six human skulls with estimated ages ranging between 4 10 years- old were selected, protected non-radiopaque tape immersed melted Mix-D soft...

OBJECTIVES The purpose of this study was to assess the experiences general dental practitioners (GDPs) with solid-state and storage phosphor digital sensors compared film. METHODS In a mail survey 578 questionnaires were sent Dutch GDPs who users X-ray detectors questionnaire requested demographic data, information about system used user-friendliness detector system. analysis data these variables related type also data. analysed using descriptive statistics, variance-analysis (One-Way ANOVA)...

To evaluate the utility of application a thyroid shield in intraoral radiography when using rectangular collimation.

Objectives: To evaluate the effectiveness of a web-based instruction in interpretation anatomy images acquired with maxillofacial cone beam CT (CBCT). Methods: An interactive education course for craniofacial CBCT was recently developed at our institution. Self-evaluation modules on correlative anatomical features were also included to support learning process. Three e-learner groups selected educational modules. The three (1) oral health specialists (OHSs) (comprising periodontologists,...

During a cone beam CT scan, the patient is in an upright or supine position. This position depends on brand and type of scanner. The aims this study are: (1) to investigate if head has effect cephalometric evaluation soft-tissue facial profile, comparing recordings natural (NHP) (SHP) (2) age, gender body mass index (BMI) are contributing factors position.90 subjects were photographed profile both NHP SHP. 12 angular linear values calculated. Two-way random intraclass correlation...

To assess the in vitro and vivo accuracy of a mathematical computer-based reconstruction two images that are not taken with same recording geometry for measurement apical root resorption following orthodontic treatment.A gold standard was developed from 10 extracted upper central incisors using calipers. Radiographs made five different projection angles were reconstructed mathematically by observers. The calculated loss length compared standard. Eighty-two 61 patients radiographically...

OBJECTIVES To compare the standards of periapical radiography with a CCD-image receptor film. METHODS Three technicians exposed total fifty teeth from all areas jaws using either size 1 or 2 film and Sidexis (Siemens, Bensheim, Germany) direct digital dental system appropriate holders. Image quality was assessed by two radiologists for nine individual criteria overall, on three-point scale. RESULTS There significant difference between sensor exposures (P < 0.014). Six per cent films...

OBJECTIVE To compare the sensitometric properties, diagnostic efficacy and image quality of InSight (F-speed) Ektaspeed Plus (E-speed) dental X-ray films (Kodak Eastman Co, Rochester, USA). METHODS Characteristic curves were constructed, using manual automatic processing, in order to film speed average gradient. The yield was compared by assessment endodontic file length. Endodontic files, sizes 10 15, placed at root apex or 1.5 mm short. exposure time for 20% lower than that Plus. Seven...

OBJECTIVES To compare organ and effective doses from analogue scanographic periapical radiography. METHODS Thermoluminescent dosimeters (TLD-700) were inserted in the parotid glands (bilateral), submandibular (bilateral) bone marrow (left ascending ramus) of three human cadavers. Dosimeters also attached to skin, thyroid gland lens both eyes. Central, left lateral posterior scanograms obtained with a Cranex Tome (Soredex, Helsinki, Finland) multimodal imaging system. A similar procedure was...