Morse taper performance: A finite element analysis study

OBJECTIVES: To evaluate and compare the magnitude and distribution of stresses generated on implants, abutments and first molar metal-ceramic crowns using finite element analysis. METHODS: Preliminary three-dimensional models were created using the computer-aided design software SolidWorks. Stress and strain values were observed for two distinct virtual models: model 1 - Morse taper and solid abutment; model 2 - Morse taper and abutment with screw. A load (250 N) was applied to a single point of the occlusal surface at 15° to the implant long axis. Von Mises stresses were recorded for both groups at four main points: 1) abutment-retaining screws; 2) abutment neck; 3) cervical bone area; 4) implant neck. RESULTS AND CONCLUSION: Model 1 showed a higher stress value (1477.5 MPa) at the abutment-retaining screw area than the stresses found in model 2 (1091.1 MPa for the same area). The cervical bone strain values did not exceed 105 µm for either model.

[1]  Kenneth J. Anusavice,et al.  Phillips' science of dental materials , 2013 .

[2]  A. Bacchi,et al.  Effect of framework material and vertical misfit on stress distribution in implant-supported partial prosthesis under load application: 3-D finite element analysis , 2013, Acta odontologica Scandinavica.

[3]  J. Sloten,et al.  Influence of implant connection type on the biomechanical environment of immediately placed implants - CT-based nonlinear, three-dimensional finite element analysis. , 2009, Clinical implant dentistry and related research.

[4]  R. Ribeiro,et al.  Fracture resistance of the implant-abutment connection in implants with internal hex and internal conical connections under oblique compressive loading: an in vitro study. , 2009, The International journal of prosthodontics.

[5]  L. Geris,et al.  The effect of micro-motion on the tissue response around immediately loaded roughened titanium implants in the rabbit. , 2007, European journal of oral sciences.

[6]  Allahyar Geramy,et al.  Finite element analysis of three designs of an implant-supported molar crown. , 2004, The Journal of prosthetic dentistry.

[7]  F van Keulen,et al.  Numerical simulation of tissue differentiation around loaded titanium implants in a bone chamber. , 2004, Journal of biomechanics.

[8]  S. Müftü,et al.  Mechanics of the tapered interference fit in dental implants. , 2003, Journal of biomechanics.

[9]  G. Liu,et al.  Application of finite element analysis in implant dentistry: a review of the literature. , 2001, The Journal of prosthetic dentistry.

[10]  U. Belser,et al.  Mechanics of the implant-abutment connection: an 8-degree taper compared to a butt joint connection. , 2000, The International journal of oral & maxillofacial implants.

[11]  J I Nicholls,et al.  Stress fatigue: basic principles and prosthodontic implications. , 1995, The International journal of prosthodontics.

[12]  Re Link,et al.  An Introduction to the Design and Behavior of Bolted Joints , 1991 .

[13]  P P Binon,et al.  Implants and components: entering the new millennium. , 2000, The International journal of oral & maxillofacial implants.

[14]  S. Moaveni.  Finite Element Analysis , 1999 .

[15]  S. Campbell,et al.  Ceramics in dentistry: historical roots and current perspectives. , 1996, The Journal of prosthetic dentistry.

[16]  J B Brunski,et al.  Biomechanical factors affecting the bone-dental implant interface. , 1992, Clinical materials.