Finite element investigation of implant-supported fixed partial prosthesis in the premaxilla in immediately loaded and osseointegrated states |
| |
| Authors: | I. Hasan F. Heinemann S. Reimann L. Keilig |
| |
| Affiliation: | 1. Endowed Chair of Oral Technology, Rheinische Friedrich-Wilhelms University , Welschnonnenstr. 17, 53111 , Bonn , Germany;2. Department of Prosthodontics , Gerodontology and Biomaterials, University of Greifswald , Rotgerberstr. 8, 17475 , Greifswald , Germany;3. Endowed Chair of Oral Technology, Department of Prosthetic Dentistry, Preclinical Education and Materials Sciences , Rheinische Friedrich-Wilhelms University , Welschnonnenstr. 17, 53111 , Bonn , Germany |
| |
| Abstract: | The aim of this study was to gain insight into the behaviour of the stresses and strains at the bone–implant interface of an implant-supported fixed partial prosthesis (FPP) in the premaxilla under immediate loading and osseointegrated conditions. Finite element models of a four-unit FPP were generated. An extreme condition was simulated, using only two immediately loaded implants in order to derive recommendations for possible clinical application. Straight and 20°-angled abutments and bonded or sliding contact between the bridge and abutment were simulated. In addition, two models were generated with two completely osseointegrated implants. A 150 N load to the prosthesis at a 45° angle to the long axis of each implant was applied. Minor differences were observed in implant displacements, stress and strain distributions of the two abutment designs. However, bone loading exceeded the physiological limits, including a risk of bone atrophy. A considerable decrease in implant displacements and bone loading was observed in the osseointegrated cases. An FPP supported by only two implants cannot be recommended for immediate loading. |
| |
| Keywords: | fixed partial prosthesis implant abutment immediate loading FEM bone loading |
|
|
