CephSmile V2.0:Program for cephalometric analysis and facial simulation after orthodontic treatments.

CephSmile is a program for cephalometric analysis which can draw the trace line of the hard tissues and soft tissues on lateral and frontal cephalograms from the landmarks defined by dentists and orthodontists. Furthermore, CephSmile also perform cephalometric analyses by calculating the linear and angular measurements on lateral and frontal cephalograms as the means to detect the malocclusions along with other dental misalignment which the treatment results can be compared at the different periods of orthodontic treatments to predict the facial changes whether how the facial profiles will change after finishing the orthodontic treatments program.

The overall proposes for this project is to develop the medical software to suit for Thai people and reduce the importation of orthodontic software which require both expensive initial investments along with annual maintenance fees for continuing supports. Furthermore, this program is to allow software development to meet the requirements mainly from domestic orthodontists and dentists.

CephSmile Version 1.0 has become a commercial software in the market while CephSmile Version 2.0 the further development from CephSmile V.1.0 by improving Graphics User Interface (GUI) to be more aesthetic and user friendlier than previous version along with the change of window size according to the screen resolutions, Image Dialog Viewer to allow user to choose the digital images as the necessary input for CephSmile. The PA analysis on the frontal cephalograms to check the facial symmetry have been added along with the existing lateral cephalometric analysis along with the expert system to perform preliminary cephalometric analyses before planning for the orthodontic and orthognathic treatments. The other additional function is the 2D dental model analysis to measure dental arch parameters along with the dental widths of individual teeth and the dental arch drawing and measurements to compare with the sum of individual dental widths and check whether there is any dental space left for orthodontic treatments or dental crowding along with the 2D simulation of dental movement after dental segmentations. There is also a particular function of CephSmile V.2.0 to simulate 3D skull from 2D data from lateral and frontal cephalogram through 3D image warping on the standard 3D skull.

Functions CephSmile Version 2.0

  • Cephalometric Lateral Analysis : CephSmile has the local contrast enhancement function which improve the image quality to allow a lateral cephalogram overlaying on the corresponding photograph along with landmark positioning and automatic trace lines drawings on skull, facial soft tissue, and dental trace lines after defining the landmarks according to the reference points which function as facilitating tools for fast and correct landmark positioning and performing various cephalometric analyses such as the national cephalometric analyses including Mahidol Analysis, Chula Analysis Chiang Mai Analysis, Songkla Analysis, Songkla Orthognathic Analysis and Khon Kaen Analysis as well as international analyses including Down Analysis, Steiner Analysis, Tweed Analysis, Jaraback Analysis, Harvold Analysis, Ricketts Analysis, McNamara Analysis ABO Analysis and Sassouni Analysis These cephalometric analyses are important information to indicate the sources of malocclusals in the skull, facial and dental structure.

  • Superimposition : CephSmile could draw the trace lines on skull, teeth, facial soft tissue and hard tissue section on lateral cephalogram from the landmarks specified by dentists and orthodontists with the linear and angular measurements for Cephalometric Analysis. User can print the results and save the data for the later comparisons with the results for pre analysis, during analysis and post analysis on superimposition module of CephSmile.

  • Orthodontic Treatment Simulation : CephSmile has orthodontic treatment simulation for the lateral facial data after orthodontic treatment by applying 2D Thin Plate Spline process along with Bilinear Interpolation and Geometric Transform to fill the vacant pixels due to the simulation. Furthermore, image registrations have been applied to compare the results after orthodontic treatments. Furthermore, the orthodontic treatment simulation has used the statistic data of facial changes after orthodontic treatments collected from about 50 Thai patients by orthodontists from Faculty of Dentistry, Mahidol University to get the orthodontic treatment simulation that suit to the specifications of Thai people.

  • Dialog for Viewing Patient's Data :CephSmile has a special module for viewing images within the directory which allow user to select the images to be applied as a inputs for functions within CephSmile

  • PA Analysis : PA (Posteroanterior) View function is the function using the frontal photograph and radiographic image for symmetry analysis before performing orthodontic and/or orthgnathic treatments. This module allows the frontal cephalogram overlaying on the frontal photographic image along with the trace line drawing after positioning the landmarks on the frontal cephalogram with the corrections just like the corresponding lateral cephalometric analysis.

  • 2D Digital Model Analysis & Planning : Dental model analysis is very important to compare the sum of individual dental widths with the dental curve whether there is dental space or dental crowding to help the orthodontists to plan the orthodontic treatments that solve the dental spacing problems including teeth extraction in addition to orthodontic treatments or otherwise. The additional dental model analysis would be the dental arch parameters to check the shape of dental arch for optimal orthodontic treatment results.

  • 3D Skull from 2D Projections : The construction of 3D skull model generally done by using data from CT scan which require 3-700 CT images depended upon the resolution before transforming 2D data into a 3D image. However, the cost to obtain CT data for dental applications is still so high that few dentists and orthodontists could afford to invest on CT scan systems compared to X-Ray for dental applications which are basic routine for a patient. Therefore, the solution for this problem is to apply 3D Skull from 2D Projections using the lateral and frontal cephalograms and corresponding landmarks and trace line as the cheaper alternative to the expensive CT scan.