Topic: 3D Superimposition of Craniofacial Imaging

Abstract
One of the main advantages of the CBCT is that it allows superimposition of serial images to evaluate the growth and treatment changes. This is an efficient way for showing areas of bone displacement and remodeling, as well as demonstrating the changes in size, shape, and shift in positions of skeletal and soft tissues as a result of either orthodontic or surgical treatments. The 2D cephalograms have been traditionally used to evaluate these changes based on stable reference structures or anatomical landmarks. The traditional approach to lateral cephalometric superimposition is based on using the most stable anatomical landmarks. However, a major limitation is the 2D representation of a 3D structure with difficulty in landmarks identification due to the superimposition of multiple structures. In contrast, 3D images provide easier and more accurate anatomical landmarks registration that can be used for superimposition.

Learning objectives

This lecture will provide:

1. Information about superimposition techniques
2. Discuss the accuracy and the reliability of superimpositions
3. Explain the importance of using superimposition in the evaluation of treatment outcomes

Speaker: Dr. Ahmed Ghoneima, Chair and Associate Professor- Orthodontics, Hamdan Bin Mohammed College of Dental Medicine 

CPD accreditation number: CPD-0375-19

CME: 1.5