Mostafa Abd El Hamid Abd El Ghany, Ahmed Gamal Ahmed Hassan And Emad Mohamed Tolba,

ABSTRACT


Introduction: Removable Prostheses Are Provided To Enable Oral Masticatory Function And To Improve The Quality Of Life For Edentulous Patients. The Main Objective In Denture Fabrication Is The Preservation Of The Remaining Oral Structures. In This Regards Efforts Should Be Made To Decrease Stresses To Residual Alveolar Ridges. Aim Of The Study: To Evaluate And Compare The Effect Of Ball And Socket And Bar Attachments On Supporting Structures In Implant Supported Overdenture Using Three Dimensional Finite Element Analysis (3D FEA).

Materials and Methods: A Three Dimensional (3D) Digital Model Simulating An Edentulous Mandible And A Mandibular Over Denture Was Constructed. The Mandibular Over Denture Was Supported By Two Implants Placed In The Canine Region Bilaterally With Ball And Socket Attachment In One Model (model I) And Bar Attachment In The Other Model (model II). The Digital Model Was Created From Scanning Of Edentulous Natural Mandible And A Suitable Set Of Anatomical Artificial Teeth By Identica Hybrid 3D Dental Scanner. The Stimulated Denture As Well As The Mucosa Was Drawn By Solid Work Software 2017.

Results: The Stresses Generated In Case Of Using Ball And Socket Attachment Were In General Less Than Those Generated In Case Of Bar Attachment. The Exceptions Were In Case Of Spongy Bone And Mucosa. Conclusion: Ball And Socket Attachment System Transmitted Lesser Amount Of Stresses To The Implants As Compared To The Bar-Clip Attachment System.