title: Efficacy of adding a supporting implant in stress distribution of long-span fixed partial dentures: a 3D finite element analysis.
abstract: Background. Long span is seen in many clinical situations. Treatmentplanning options of these cases are difficult and may require FPD, RPD or ISP. Each option has its own disadvantages, including mechanical problems, patient comfort and cost. This article will evaluate the stress distribution of a different treatment option, which consists of adding a single sup-porting implant to the FPD by using 3D finite element analysis. Methods. Three models, each consisting of 5 units, were created as follows: 1. Tooth Pontic Pontic Pontic Tooth; 2. Tooth Pontic Implant Pontic Tooth; 3. Tooth Pontic Pontic Implant Tooth. An axial force was applied to the prostheses by using 3D finite element method and stresses were evaluated. Results. The maximum stress was found in the prostheses in all the models; the highest stress values in all the shared components of the models were almost similar. Stress in implants was lower in the second model than the third one. Conclusion. Adding a supporting implant in long-span FPD has no advantages while it has the disadvantages of complicating treatment and the complications that may occur to the implant and surrounding bone.
authors.affiliation: MSc, Department of Fixed Prosthodontics, Faculty of Dentistry, Damascus University, Damascus, Syria; Professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Damascus University, Damascus, Syria.
authors.forename: Rami
authors.initials: R
authors.lastname: Shurbaji Mozayek
authors.affiliation: Lecturer, Department of Mechanical Design, Faculty of Electric and Mechanical Engineering, Damascus University, Damascus, Syria.
authors.forename: Mirza
authors.initials: M
authors.lastname: Allaf
authors.affiliation: Lecturer, Department of Mechanical Design, Faculty of Electric and Mechanical Engineering, Damascus University, Damascus, Syria.
authors.forename: Mohammad
authors.initials: M
authors.lastname: B Abuharb
keywords: Finite element analysis; fixed partial denture; implant-supported dental prosthesis