Impact of implant number, distribution and prosthesis material on loading on implants supporting fixed prostheses

Summary  The purpose of this study is to evaluate axial forces and bending moments (BMs) on implants supporting a complete arch fixed implant supported prosthesis with respect to number and distribution of the implants and type of prosthesis material. Seven oral Brånemark implants with a diameter of...

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Bibliographic Details
Published in:Journal of oral rehabilitation 2010-07, Vol.37 (7), p.525-531
Main Authors: OGAWA, T., DHALIWAL, S., NAERT, I., MINE, A., KRONSTROM, M., SASAKI, K., DUYCK, J.
Format: Article
Language:English
Subjects:
Acrylic Resins - chemistry
Biomechanical Phenomena
Dental Abutments
Dental Arch - surgery
Dental Implants
Dental Materials - chemistry
Dental Prosthesis Design
Dental Prosthesis, Implant-Supported
Dentistry
Denture Design
Denture, Complete
distribution of implants
edentulous mandible
fixed dental prosthesis
Glass - chemistry
Humans
Mandible - surgery
Materials Testing
Models, Anatomic
Pliability
Polymethyl Methacrylate - chemistry
strain gauge
Stress, Mechanical
the number of implants
Titanium - chemistry
Transducers
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Summary:Summary  The purpose of this study is to evaluate axial forces and bending moments (BMs) on implants supporting a complete arch fixed implant supported prosthesis with respect to number and distribution of the implants and type of prosthesis material. Seven oral Brånemark implants with a diameter of 3.75 mm and a length of 13 and 7 mm (short distal implant) were placed in an edentulous composite mandible used as the experimental model. One all‐acrylic, one fibre‐reinforced acrylic, and one milled titanium framework prosthesis were made. A 50 N vertical load was applied on the extension 10 mm distal from the most posterior implant. Axial forces and BMs were measured by calculating signals from three strain gauges attached to each of the abutments. The load was measured using three different models with varying numbers of supporting implants (3, 4 and 5), three models with different implant distribution conditions (small, medium and large) and three models with different prosthesis materials (titanium, acrylic and fibre‐reinforced acrylic). Maximum BMs were highest when prostheses were supported by three implants compared to four and five implants (P 
ISSN:0305-182X
1365-2842
DOI:10.1111/j.1365-2842.2010.02076.x