Program including abstracts as pdf available here
Program including abstracts as pdf available here
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OP 21<br />
Title<br />
QuALITy OF SIMuLTANEOSLy TAKEN, INTEGRATED 3D-FACESCANS WITH CbCT<br />
Authors<br />
H. VENT-MEHNERT 1 , L. RITTER 2 , J. NEuSCHuLz 1 , J.E. zOELLER 2 , b. bRAuMANN 1<br />
Affiliations<br />
1 Department of Orthodontics, University of cologne, Cologne, GERMANY, 2 Department of<br />
Craniomaxillofacial and Pl<strong>as</strong>tic Surgery, University of Cologne, Cologne, GERMANY<br />
Body<br />
Aims: As orthodontic treatment planning requires information about hard and soft tissue,<br />
photographs of the patients face, a Panoramic and a lateral Ceph image are taken to provide<br />
sufficient clinical information, without considering the human skull and face in its full threedimensional<br />
complexity. A newly developed cone-beam computer tomograph (CBCT) imaging<br />
system offers the possibility to take simultaneously 3D-CBCT and 3D-Photographs. The visualization<br />
quality of orthodontically relevant structures in these 3D-Facescans w<strong>as</strong> evaluated in<br />
this study.<br />
Materials and Methods: 3D Facescans of 25 patients were evaluated by three examiners<br />
regarding their image quality on a scale from 1, very good, to 6, not usable. The following soft<br />
tissue points were considered: N<strong>as</strong>ion, Subn<strong>as</strong>ale, Orbitale left, Orbitale right and Pogonion.<br />
All Scans were taken by a CBCT prototype with integrated Facescan (GALILEOS, Sirona Dental<br />
Systems, Germany).<br />
Results: Most scans showed all relevant strucures and had a sufficient field-of-view at le<strong>as</strong>t<br />
15x15x15cm. The quality of the strucures w<strong>as</strong> rated for N<strong>as</strong>ion with 1,56 ±0,76, Subn<strong>as</strong>ale<br />
2,64 ±1,05, Orbitale right 2,01 ±0,86, Orbitale left 2,16 ±1,16 and Pogonion 4,41 ±1,22.<br />
Relevant constraints were caused by two factors: first the fixation device overlayed the<br />
patients anatomy, second moving artifacts diminished image quality.<br />
Conclusion: Although t<strong>here</strong> were factors who minored the results of the image quality such<br />
<strong>as</strong> artifacts and positioning tools, orthodontically relevant structures could be seen and can<br />
be used for 3D-soft tissue analysis. Elimination of these factors and improvement of patients<br />
fixation should incre<strong>as</strong>e the image quality to allow a comprehensive 3D-analysis.<br />
Keywords<br />
CBCT, integrated Facescan, orthodonic Imaging<br />
aBSTracTS OP 2<br />
39
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