Extended parallel backprojection for standard three-dimensional and phase-correlated four-dimensional axial and spiral cone-beam CT with arbitrary pitch, arbitrary cone-angle, and 100% dose usage

This study aimed to reveal the correlation between the radiolucency area around the crown of impacted maxillary canines and dentigerous cysts using cone beam CT (CBCT). CBCT data were obtained from patients with impacted maxillary canines. Three points of five areas (tooth cusp area and buccal, lingual, mesial and distal areas of the crown) were randomly selected, and the distance between the point and the surrounding hard tissue was measured respectively. The mean values were recorded as the radiolucency area. These results were compared with the occurrence of dentigerous cysts during surgery. 58 patients with 76 impacted maxillary canines were included. 14 of the 76 impacted canines were accompanied by cysts (18.42%). With the increase in the thickness of the radiolucency area, the incidence of cysts was significantly increased (p < 0.05). No cysts were found in the compacted canines with 0–1 mm thickness of the radiolucency area. The highest incidence (71.43%) was observed in canines with 3–4 mm thickness of the radiolucency area. This study found that the thickness of the radiolucency area around the crown of the maxillary impacted canine was closely related to the occurrence of dentigerous cysts. CBCT can be used to estimate the occurrence possibility of dentigerous cyst and guide surgical operations.

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An algorithm to extract three-dimensional motion by marker tracking in the kV projections from an on-board imager: four-dimensional cone-beam CT and tumor tracking implications

Journal of Applied Clinical Medical Physics ◽

10.1120/jacmp.v12i2.3407 ◽

2011 ◽

Vol 12 (2) ◽

pp. 223-238 ◽

Cited By ~ 8

Author(s):

Imad Ali ◽

Nesreen Alsbou ◽

Terence Herman ◽

Salahuddin Ahmad

Keyword(s):

Cone Beam Ct ◽

Three Dimensional ◽

Cone Beam ◽

Marker Tracking ◽

Tumor Tracking ◽

Dimensional Cone

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Three-dimensional C-arm Cone-beam CT: Applications in the Interventional Suite

Journal of Vascular and Interventional Radiology ◽

10.1016/j.jvir.2009.04.059 ◽

2009 ◽

Vol 20 (7) ◽

pp. S523-S537 ◽

Cited By ~ 53

Author(s):

Michael J. Wallace ◽

Michael D. Kuo ◽

Craig Glaiberman ◽

Christoph A. Binkert ◽

Robert C. Orth ◽

...

Keyword(s):

Cone Beam Ct ◽

Three Dimensional ◽

Cone Beam

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Taurodontism and Van der Woude Syndrome

The Angle Orthodontist ◽

10.2319/081707-384.1 ◽

2008 ◽

Vol 78 (5) ◽

pp. 832-837 ◽

Cited By ~ 16

Author(s):

Hiroyuki Nawa ◽

Snehlata Oberoi ◽

Karin Vargervik

Keyword(s):

Clinical Sample ◽

Cone Beam Ct ◽

Three Dimensional ◽

Panoramic Radiograph ◽

Cross Sectional Study ◽

Cone Beam ◽

Linear Measurements ◽

Van Der Woude Syndrome ◽

Cross Sectional ◽

Mandibular First Molar

Abstract Objective: To report the occurrence of taurodontism in a clinical sample of Van der Woude syndrome (VWS) and describe its association with hypodontia and cleft type. Materials and Methods: This retrospective, cross-sectional study was carried out on chart reviews and radiographs of 13 persons with VWS. Mean age was 10 years 11 months ± 1 year 5 months. Panoramic radiographs were used to confirm the presence or absence of teeth and to measure crown body and root lengths of mandibular first molars. Three-dimensional cone beam computed tomography (CT) scans were available on two persons with VWS. Both volumetric and linear measurements were obtained. Results: The occurrence of taurodontism of the mandibular first molar was 35%: 27% hypodont and 8% mesodont. Of the 13 subjects with VWS, 6 (4 males and 2 females) had at least one tooth identified with taurodontism. Half of the cases were unilateral and half were bilateral, and all of the unilateral cases were on the left side. Five of the six subjects with taurodontism had missing incisors and premolars. Taurodontism was two times more frequent in those who were missing their second premolars than in those who had their second premolars. There was no correlation between cleft type and presence of taurodontism. The cone beam CT pilot study on two persons showed very abnormal morphology of both crown and roots, which was not apparent on the standard panoramic radiograph. Both the volumetric and linear measurements of the ratio of crown body to root were highly indicative of taurodontism. Further genetic studies are needed. Conclusion: There is a likely association between VWS and taurodontism.

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