A5009645531- Dental Radiography and Imaging
- Oral and Maxillofacial Pathology
- Dental Implant Techniques and Outcomes
- Advanced X-ray and CT Imaging
- Endodontics and Root Canal Treatments
- Bone Tumor Diagnosis and Treatments
- Sinusitis and nasal conditions
- Facial Trauma and Fracture Management
- Medical Imaging Techniques and Applications
- Salivary Gland Tumors Diagnosis and Treatment
- Bone health and treatments
- Head and Neck Surgical Oncology
- Radiation Dose and Imaging
- Reconstructive Surgery and Microvascular Techniques
- Healthcare Systems and Technology
- Medical Malpractice and Liability Issues
- Radiology practices and education
- Orthodontics and Dentofacial Orthopedics
- Anatomy and Medical Technology
- Craniofacial Disorders and Treatments
- Tumors and Oncological Cases
- Systemic Lupus Erythematosus Research
- Salivary Gland Disorders and Functions
- interferon and immune responses
- dental development and anomalies
Helsinki University Hospital
2014-2025
University of Helsinki
2014-2025
Imaging Center
2015-2021
Malmö University
2009
Objectives: The aim of this study was to evaluate the radiation dose and image quality four dental cone beam CT (CBCT) scanners, compare them with those two multislice (MSCT) scanners. Methods: Tissue doses were measured using a tissue-equivalent anthropomorphic RANDO Head Phantom® thermoluminescence dosemeters (TLD). An RSVP PhantomTM specially designed cylindrical insert used for comparison absorbed dose. Image evaluated in form contrast-to-noise ratio (CNR) modulation transfer function...
The aim of this study was to evaluate the accuracy linear measurements obtained with dental cone beam CT (CBCT) and multislice (MSCT) by altering radiation doses using pre-operative planning placement oral implants as a model.A human cadaver mandible examined in two edentulous areas one dentate area CBCT MSCT. both dry immersed sucrose solution isointense soft tissue. Two readers measured four distances twice from each section. cut into 4 mm thick slices at three marked places. These were...
Panoramic and intraoral radiographs are the basic imaging modalities used in dentistry. Often they only techniques required for delineation of dental anatomy or pathology. radiography produces a single image maxilla, mandible, teeth, temporomandibular joints maxillary sinuses. During exposure x-ray source detector rotate synchronously around patient producing curved surface tomography. It can be supplemented with radiographs. However, these give two-dimensional view complicated...
Purpose: To determine the applicability of cone-beam computed tomography (CBCT) in otological imaging, and to compare its accuracy with routinely used multislice helical CT (MSCT) for imaging middle- inner-ear areas. Material Methods: Thirteen unoperated human cadaver temporal bones were imaged CBCT MSCT. Sixteen landmarks middle adjacent inner ear evaluated compared their conspicuity according a modified Likert scale. Total scores subgroups including specific clinical interest also...
Objectives:To quantify the treatment outcome of secondary alveolar bone grafting (SABG) in individuals with unilateral cleft lip and palate using cone beam computed tomography (CBCT) to reveal needs for improvement surgical technique.
Handheld portable X-ray devices are increasingly used for intraoral radiography. This development introduces new challenges to staff and patient safety, which or revised risk assessments must be made acted upon prior use. Major issues might be: difficulties in using rectangular collimation with beam aiming devices, more complex matching of exposure settings the receptor (e.g. longer times), movements owing units' weight, protection operator third persons, use uncontrolled environments. These...
In craniomaxillofacial surgical procedures, an emerging practice adopts the preoperative virtual planning that uses medical imaging (computed tomography), 3D thresholding (segmentation), modeling (digital design), and additive manufacturing (3D printing) for procurement of end-use implant. The objective this case study was to evaluate cumulative spatial inaccuracies arising from each step process chain when various computed tomography protocols values were independently changed. A...
Replacing congenitally missing teeth can be challenging due to anatomical limitations. This retrospective radiographic study aimed evaluate i) the dimensions of alveolar ridge in maxillary lateral incisor sites and ii) whether straightforward implant placement a prosthetically ideal position was possible. CBCT images were measured at 3, 8, 13 mm from planned crown margin labio-palatal mesio-distal dimension. Virtual planning completed 3D software 3 wide 10 long (with 1.5mm safety distance...
The use of rapid prototyping (RP) models in medicine to construct bony is increasing.The aim the study was evaluate retrospectively indication for RP oral and maxillofacial surgery at Helsinki University Central Hospital during 2009-2010. Also, used computed tomography (CT) examination - multislice CT (MSCT) or cone beam (CBCT) method evaluated.In total 114 were fabricated 102 patients. mean age patients time production model 50.4 years. indications modelling included malignant lesions...
Objectives: To evaluate the usefulness of 3DX multi-image micro-CT device in clinical dental practice. Methods: Images 198 examinations performed with a during 6 month period private practice were evaluated retrospectively for benefit additional information compared panoramic or intraoral radiographs. Results: The main indication use was planning implant placement 49% examinations. Diagnosis exclusion infection peri-implantitis represented 28% and tooth, root foreign body localization 13%....
Background: Clinical cone-beam computed tomography (CBCT), used in diagnostics of dental and maxillofacial radiology for almost 10 years, allows three-dimensional (3D) imaging a focused area, with reasonable radiation dose. Purpose: To clarify the applicability CBCT temporal bone. Material Methods: We imaged cadaver bones, one non-operated five postmortem operated, to evaluate accuracy this method showing clinically important landmarks positions middle-ear implants. In addition, protocols...
Objective. To examine whether the rapid increase in availability of cone-beam computed tomography (CBCT) has changed number inferior alveolar nerve (IAN) injuries related to removal mandibular third molars Finland. The hypothesis was that should diminish due better imaging methods. Materials and CBCT devices, annual examinations permanent IAN occurring between 1997 2007 were analyzed. data collected from three national registers: Radiation Nuclear Safety Authority, Social Insurance...
An asymptomatic cystic lesion in the corpus region on right side of mandible was detected a panoramic radiograph 13-year-old girl, taken for orthodontic reasons. MR examination revealed cavity filled with fluid and thin-rim peripheral contrast enhancement similar to an odontogenic cyst lined epithelium. The clinical histological diagnosis simple bone cyst. This report demonstrates confounding similarity findings
Abstract Objectives Chronic rhinosinusitis (CRS) frequently stems from a dental origin, although odontogenic sinusitis (OS) remains underdiagnosed amongst different professionals. This study aimed to explore how often causes are considered when diagnosing CRS. Materials and methods Patient records 374 new CRS patients treated at tertiary-level ear, nose, throat (ENT) clinic were selected. Entries radiological reports assessed exploring dentition was mentioned OS suspected, radiologists...