Noha Hamada, Hossam Kandil, Ghada Borhan And Mahmoud Abdel Raouf Shalash .,

ABSTRACT
Objective: The Purpose Of The Current Study Aimed To Assess The Reliability Of CBCT Imaging Modality In The Field Of Computer Guided Surgery By Evaluating The Dimensional Accuracy Of Three-dimensional Bone Supported Surgical Stent Fabricated On Mandibular Jaw Model And Generated From CBCT. Methods: A Total Of 10 Dummy Implants (legacy, Implant Direct) Were Placed In Two Mandibular Models (n=5). Preoperative Scans Were Taken By CBCT Scanner (SCANORA 3D), Implant Plan And Surgical Stent Design Were Done By On Demand And Implant Studio Software, The Surgical Stent Was 3D Printed By Selective Laser Sintering (FORMIGA P110, EOS, Germany) . Postoperative CBCT Scans Were Done With The Same Preoperative Parameters. Both Preoperative And Postoperative CBCT Scans Were Superimposed For The Angular And Linear Deviations To Be Calculated.

Results: The Statistical Analysis Showed Significant Difference Between The BL And MD Angular Deviation, With The Highest Mean Value Found In Buccolingual Angular Deviation Measurement (2.32 � 1.89), While Mesiodistal Angular Deviations Showed Lower Mean Value (1.32 � 1.17). Regarding The Linear Apical Depth Deviation, It Showed The Lowest Mean Value (0.46 � 0.29). Conclusion: The Implants Were Placed With Accuracy And Precision Comparable To The Accepted Range Stated In The Previously Reviewed Studies, Which Proves The Reliability And Predictability Of The CBCT Conjugating With Computer Guided.