Emad Mohamed T. Agamy, Iman A. Elasfahani And Haytham M. AbdelAal,

ABSTRACT
Objective: The Aim Of This Study Was To Evaluate The Distribution Of Stresses In Single Implant Supported Mandibular Over Denture, By Three-dimensional Finite Element Analysis (3D FEA).

Materials and Methods: A 3D Finite Element Model Of Mandibular Overdentures Was Established, Using Single Implant With Ball And Socket Attachment. The Implant Was Inserted At The Position Of Central Incisor Area. Two Types Of Loads Were Applied To The Model: Total Of 150 N Vertical And 45 Degree Oblique Loads On The Right First Premolar, Second Premolar And First Molar. The Distribution Around Peri-implant Bone, Implant, Mucosa And Overdentures Were Recorded.

Results: The Maximum Recorded Stresses Under Vertical Loading Were 25 Mpa While Under Oblique Loading Were 36.5 Mpa. No Failure Occurred In Any Part Of The Model. All Maximum Stresses Were Less Than The Yield Strength And Within The Biological Range. Conclusion And Clinical Significance: Single-implant-retained Mandibular Overdentures Do Not Show Damaging Stress Concentration Neither In The Bone Around The Implant, Different Supporting Structures Nor The Prosthesis. In This Regard It May Be Considered A Cost Effective Treatment Option For Edentulous Patients.