Thursday, 2 June 2011

Superimposition of Cone Beam CT Scans, a New Tool for 3D
Evaluation of Treatment Effects
Three-dimensional digital records are becoming more and more popular among orthodontists and
maxillofacial surgeons as the specialties progress towards a three dimensional (3D) virtual
representation of the patient for diagnosis, treatment planning and simulation. Cone Beam
Computed Tomography (CBCT) scans have been well established as a valuable tool in the
orthodontist’s and surgeon’s 3D toolkit. Superimposition of serial cephalometric radiographs has
been traditionally used for assessment of growth and treatment effects or stability over time.
Superimposition of CBCT scans is a newly introduced tool that allows three dimensional
visualization of these effects. This presentation will review the novel methods of superimposition
3D CBCT models with emphasis on voxel based superimposition; a newly developed semiautomated
registration technique.
Dr. Rania Nada
Rania Nada is currently working at the Department of Orthodontics and
Craniofacial Biology, Radboud University Nijmegen Medical Centre. She
obtained her BDS from Cairo University in 1999 and Diploma of Membership in
Orthodontics from the Royal College of Surgeons of Edinburgh in 2005. In
2006 she completed her specialty training in Orthodontics and obtained a
Master Degree in Orthodontics and Pediatric dentistry from Cairo University.
Shortly afterwards, she started her PhD at the department of Orthodontics and
Craniofacial Biology, Radboud University, Nijmegen Medical Centre and joined
the 3D Facial Imaging Group Nijmegen-Bruges. In 2010 she won the prize for
the best research presentation during the 3 rd International Congress on 3D-
Diagnosis and Virtual Treatment Planning.
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