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Cone bean computed tomography

Shuai Wang, Lu Ye, Mei Li, Han Zhan, Rui Ye, Yu Li, Zhihe Zhao
OBJECTIVES: To investigate the individual and synergistic effects of growth hormone (GH) and functional appliance (FA) on mandibular growth in an adolescent rat model. MATERIALS AND METHODS: Forty adolescent (6-week-old) female Wistar rats were randomly divided into four groups (10 rats in each group). The control group received a sham treatment (intra-abdominal injection of phosphate-buffered saline), the GH group received an intra-abdominal injection of recombinant human growth hormone, the FA group was treated with a mandibular advancement device, and the GH+FA group received both the GH and FA treatments...
April 30, 2018: Angle Orthodontist
Massimo Galli, Andrea Papini, Barbara Buffoli, Marco Ferrari, Mauro Labanca, Rita Rezzani, Mario Migliario, Alberta Greco Lucchina, Luigi F Rodella
The cranial portion of the vertebral segment together with the atlanto-occipital joint represents a very complex area. Since this system could be influenced by different atlas and mandibular position, the aim of this work was to assess atlanto-axial and mandibular rotation. Scanora 3-dimensional cone bean computed tomography images from 205 patients without signs or symptoms of temporomandibular disorder were evaluated. Using a digitalized images analyzer, the axial rotations of atlas and mandible rotation were calculated, measuring the angle with respect to the frontal plane...
March 20, 2018: Journal of Craniofacial Surgery
Y Du, W Zhou, Y Pan, Y Tang, L Wan, H Jiang
BACKGROUND: Older alveolar cleft patients (>12 years old) often have wide bone defect as well as teeth loss, resulting in poor osseous healing with conventional alveolar bone grafting (ABG). In this study, we investigated a surgical technique of block iliac bone grafting for the alveolar cleft reconstruction and evaluated the clinical and radiological outcomes of these cleft patients. MATERIAL AND METHODS: Fifteen patients were included in this study. All cases received preoperative cone bean computed tomography (CBCT) scans for the alveolar cleft evaluation...
March 1, 2018: Medicina Oral, Patología Oral y Cirugía Bucal
Taruska Ventorini Vasconcelos, Boulos B Bechara, Clyde Alex McMahan, Deborah Queiroz Freitas, Marcel Noujeim
OBJECTIVE: To evaluate zirconium implant artifact production in cone beam computed tomography images obtained with different protocols. STUDY DESIGN: One zirconium implant was inserted in an edentulous mandible. Twenty scans were acquired with a ProMax 3D unit (Planmeca Oy, Helsinki, Finland), with acquisition settings ranging from 70 to 90 peak kilovoltage (kVp) and voxel sizes of 0.32 and 0.16 mm. A metal artifact reduction (MAR) tool was activated in half of the scans...
February 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Lian-Hua Liu, Xiao-Feng Yang
A 20-year-old male presented to hospital with blood in the mucus, which had occurred for 6 months, and was diagnosed with nasopharyngeal carcinoma (NPC). Due to passive smoking, the patient developed a constant and violent cough, pain behind the right ear and swelling of the retropharynx. The results of a computed tomography scan, which was performed during re-examination of the patient, revealed that the right lymphonodi retropharynici had decreased in size and the hypodense shadow of the prevertebral space had become clear...
June 2016: Oncology Letters
Song-song Guo, Wei-na Zhou, Lin-zhong Wan, Hua Yuan, Ye Yuan, Yi-fei Du, Hong-bing Jiang
OBJECTIVE: To investigate the clinical application of a new computer-aided design - (CAD) based planning method for the treatment of type B condylar head fractures without fragmentation. METHODS: A total of 13 adult patients (19 sides) with type B condylar head fractures were included in the study. In all cases, imaging was performed using cone bean computed tomography (CBCT) preoperative, and Digital Imaging and Communications in Medicine (DICOM) files were imported into Simplant 11...
February 2016: Journal of Cranio-maxillo-facial Surgery
Mogammad Thabit Peck
BACKGROUND: The loss of teeth, whether it is from trauma or pathology, is accompanied by a concomitant loss of the surrounding alveolar bone. Khoury introduced a new method for grafting ridge defects in 2007. This technique involved using thin cortical plates harvested from the ramus, and in a 'sandwich' type manner, interposed these bone plates with cancellous bone harvested from the same site. Although this has shown success, the technique suffers from similar disadvantages of most harvesting techniques, i...
September 1, 2015: Journal of Contemporary Dental Practice
A Iu Vasil'ev, A P Buzhilova, E A Egorova, D V Makarova, N Ia Berezina, I S Zorina, V I Khartanovich
OBJECTIVE: To study the capabilities of cone-bean computed tomography (CBCT) in estimating the bone structure when analyzing anthropological findings. MATERIAL AND METHODS: Twenty-four bone fragments (remains) of Napoléon Bonaparte Imperial Army soldiers who had died at a Königsberg military hospital during their retreat from Russia in the War of 1812 were examined by CBCT. A total of 28 tubular bones with different injury healing signs and a skull with maxillofacial trauma marks were investigated...
September 2014: Vestnik Rentgenologii i Radiologii
Kazunobu Shiki, Tatsurou Tanaka, Shinji Kito, Nao Wakasugi-Sato, Shinobu Matsumoto-Takeda, Masafumi Oda, Shun Nishimura, Yasuhiro Morimoto
OBJECTIVES: The purpose of the present study was to elucidate the significance of cone bean computed tomography (CBCT) for patients hoping to undergo implant-supported restorations of the maxilla. Therefore, two studies were planned. One was to compare the prevalence of anatomic variations and lesions in the maxillary sinus on CBCT of patients hoping to undergo implant-supported restorations of the maxilla with that in patients with other chief complaints in a private dental office in Japan...
May 28, 2014: Head & Face Medicine
Yi-qiang Yang, Zhen-lin Mi, Zhen-lin Ge
OBJECTIVE: To evaluate the accuracy of cone-bean CT (CBCT) on the measurement of the tooth length. METHODS: One hundred and sixty single root premolars extracted for orthodontic purposes were selected. The tooth length was measured with vernier caliper. The premolars were divided into 10 groups randomly, 16 premolars in each group.In each group, the teeth were lined in molar area, premolar area, canine area and anterior tooth area in maxilla and mandible. Then CBCT was taken, and the tooth length was measured using the software supplied by the manufacturer in coronal and sagittal plane...
November 2013: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
P Makowiecki, A Witek, J Pol, J Buczkowska-Radlińska
AIM: To demonstrate the maintenance of pulp health in a tooth with a fractured root without any complications or endodontic treatment and the advantage of cone bean computed tomography (CBCT) compared with traditional radiographs in the diagnosis of root fractures. SUMMARY: The horizontal fracture of a maxillary central incisor is described that was an incidental finding on a routine radiographic examination 17 years after trauma. The tooth was asymptomatic. Intra-oral radiography revealed a complicated multiple root fracture with separation of the root fragments, which was not confirmed by CBCT...
September 2014: International Endodontic Journal
Yi-jiao Zhao, Fu-song Yuan, Xiao-yan Xie, Yu-chun Sun, Yi Liu, Yong Wang
OBJECTIVE: To evaluate the accuracy of four dominant methods of three-dimensional multisource data registration. METHODS: Laser-scanned dental model and maxillofacial cone-bean CT rebuilt model were collected for one orthodontic patient before treatment. Registration process was done based on locating spheres' center, anatomic landmarks, partial characteristic region and global data separately. The registration errors were detected by the function of Geomagic Studio 12...
March 2013: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Gianluigi Frongia, Pietro Bracco, Maria Grazia Piancino
The aims of this work were (1) to describe a method to identify new skeletal landmarks useful to define the reference system to orient the skull in a new position after cone-bean computed tomographic scan and (2) to demonstrate the reliability of this new method.Ten orthognathic patients (5 male, 5 female; mean [SD] age, 18.9 [1.2] years) underwent the cone-bean computed tomographic scan before surgery. Seven 3-dimensional skeletal measurements derived from 4 skeletal point of construction (C) (right, left, and median orbital C, and sella C) have been used for this study...
May 2013: Journal of Craniofacial Surgery
Benjamin P Fahimian, Yunzhe Zhao, Zhifeng Huang, Russell Fung, Yu Mao, Chun Zhu, Maryam Khatonabadi, John J DeMarco, Stanley J Osher, Michael F McNitt-Gray, Jianwei Miao
PURPOSE: A Fourier-based iterative reconstruction technique, termed Equally Sloped Tomography (EST), is developed in conjunction with advanced mathematical regularization to investigate radiation dose reduction in x-ray CT. The method is experimentally implemented on fan-beam CT and evaluated as a function of imaging dose on a series of image quality phantoms and anonymous pediatric patient data sets. Numerical simulation experiments are also performed to explore the extension of EST to helical cone-beam geometry...
March 2013: Medical Physics
Wei-min Gao, Shu-ran Liang, Yu-xing Bai
OBJECTIVE: To analyze craniofacial growth three-dimensionally for adolescents with normal occlusion in Beijing. METHODS: One hundred and twenty-six adolescents with normal occlusion were selected according to the criteria. The sample was divided into four age groups (53 within 4 years, 30 within 7 years, 27 within 10 years and 16 within 13 years). Information of growth was collected. Three-dimensional cephalometric system based on cone-bean CT was established. RESULTS: From 4 to 13 years Co-A increased (14...
December 2012: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Chao-fan Sun, Hao Sun, Zhi-wei Zheng, Yi Chen, Meng-zheng Chen, Rong-dang Hu
OBJECTIVE: To study the alveolar bone surrounding situation and the length of the root of the maxillary labial inverted impacted incisor in mixed dentition after orthodontic treatment. METHODS: Fourteen cases with maxillary labial inverted impacted incisor in mixed dentition were collected. Modified Nance arch and conventional appliance were used. Cone-bean CT (CBCT) was taken after the treatment. Simplant13.0 three-dimensional reconstruction and multi-planer reconstruction (MPR) method were used to observe the labial and lingual alveolar bone crest morphology, besides, the labial and lingual length from the alveolar bone crest to cemento-enamel junction (CEJ) of the impacted incisor and the homonym tooth after treatment, along with their root length and their labial and lingual length ratio of the root surrounded by the alveolar bone to the total root length were measured...
September 2012: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Damon Dyche, Frank Burks, Brian Seifman, Kenneth Kernen, Jason Hafron
OBJECTIVES: To assess cone bean computed tomography (CBCT) for renal imaging in a phantom model, ex vivo kidney and an in vivo porcine percutaneous renal cyroablation (PRC). CBCT provides 3-dimensional sectional imaging without the space requirements, repositioning, and expenditure of computed tomography (CT). METHODS: CBCT was focused on a radiological phantom with electron density of renal tissue and visualization was recorded. The ability of CBCT to image an ex vivo kidney in a water bath, with and without contrast, was then evaluated...
February 2011: Urology
Carlos Nurko
The current 3-dimensional (3-D) technology termed "cone beam computer tomography" (CBCT) provides accurate 3-D anatomical image data similar to medical computerized tomography but at a lower cost and dose. CBCT has been suggested to be used in cases of supernumeraries because it yields accurate 3-D information relative to the orientation, sagittal position, local disorders, and neighboring anatomic structures. The purposes of this article were to: present the available 3-D imaging technology; and report the case of a patient in the late mixed dentition with a maxillary supernumerary tooth and an impacted central incisor...
July 2010: Pediatric Dentistry
Stephen Schmitt
No abstract text is available yet for this article.
June 2006: Dentistry Today
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