Surgical Procedure that cuts the chin and reposition it in the correct place

Hausdorff function analysis (Topographic Color Mapping) by superimposition of both preoperative and postoperative computed tomography 3D scans and obtaining numerical values.

Data management and analysis will be performed using Statistical Package for Social Sciences (SPSS) vs.21. Numerical data will be summarized using means and standard deviations or median and range as appropriate. Correlation analysis between Accuracy of computer assisted custom made plate and preoperative 3D virtual planning will be done using Pearson or Sperman rho as appropriate. Paired t test will be done and equivelance limit will be tested. All p- values are two sided. P- Values <0.05 will be considered significant.

Questionnaire with numerical scale ranging from minimal score ( number 1) to maximum score (number 10) in ascending manner where the minimal score indicated unpleasant or unsatisfactory result ( doesn't meet the patient expectation) and maximum score indicated satisfactory and pleasant result (fully meets patient satisfaction).