Factorial analysis of variables influencing mechanical characteristics of a single tooth implant placed in the maxilla using finite element analysis and the statistics-based Taguchi method.

The aim of this study was to determine the relative contribution of changes (design factors) in implant system, position, bone classification, and loading condition on the biomechanical response of a single-unit implant-supported restoration. Non-linear finite-element analysis was used to simulate the mechanical responses in an implant placed in the maxillary posterior region. The Taguchi method was employed to identify the significance of each design factor in controlling the strain/stress. Increased strain values were noted in the cortical bone with lateral force and an implant with a retaining-screw connection. Cancellous bone strain was affected primarily by bone type and increased with decreasing bone density. Implant stress was influenced mainly by implant type and position. The combined use of finite-element analysis and the Taguchi method facilitated effective evaluation of the mechanical characteristics of a single-unit implant-supported restoration. Implants placed along the axis of loading exhibit improved stress/strain distribution. The reduction of lateral stress through implant placement and selective occlusal adjustment is recommended. An implant with a tapered interference fit connection performed better as a force-transmission mechanism than other configurations.

[1]  I Herrmann,et al.  Applicability of osseointegrated oral implants in the rehabilitation of partial edentulism: a prospective multicenter study on 558 fixtures. , 1990, The International journal of oral & maxillofacial implants.

[2]  M S Schwarz,et al.  Mechanical complications of dental implants. , 2000, Clinical oral implants research.

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

[4]  P. Branemark,et al.  Long-term follow-up study of osseointegrated implants in the treatment of totally edentulous jaws. , 1990, The International journal of oral & maxillofacial implants.

[5]  D A Kaiser,et al.  Guidelines for splinting implants. , 2000, The Journal of prosthetic dentistry.

[6]  Ş. Canay,et al.  Comparison of stress distribution around vertical and angled implants with finite-element analysis. , 1996, Quintessence international.

[7]  U. Lekholm,et al.  Oral implant treatment in posterior partially edentulous jaws: a 5-year follow-up report. , 1993, The International journal of oral & maxillofacial implants.

[8]  Haruka Kusakari,et al.  Influence of implant design and bone quality on stress/strain distribution in bone around implants: a 3-dimensional finite element analysis. , 2003, The International journal of oral & maxillofacial implants.

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

[10]  Ming Zhang,et al.  Design of monolimb using finite element modelling and statistics-based Taguchi method. , 2005, Clinical biomechanics.

[11]  Sinan Müftü,et al.  Mechanics of the taper integrated screwed-in (TIS) abutments used in dental implants. , 2005, Journal of biomechanics.

[12]  J B Brunski,et al.  Biomaterials and biomechanics of oral and maxillofacial implants: current status and future developments. , 2000, The International journal of oral & maxillofacial implants.

[13]  B Z Laufer,et al.  Splinting osseointegrated implants and natural teeth in rehabilitation of partially edentulous patients. Part I: laboratory and clinical studies. , 1997, Journal of oral rehabilitation.

[14]  Chun-Li Lin,et al.  Multi-factorial retainer design analysis of posterior resin-bonded fixed partial dentures: a finite element study. , 2005, Journal of dentistry.

[15]  Richard M Aspden,et al.  Statistical methods in finite element analysis. , 2002, Journal of biomechanics.

[16]  K. Akca,et al.  Role of mechanical environment and implant design on bone tissue differentiation: current knowledge and future contexts. , 2004, Journal of dentistry.

[17]  L. Gettleman,et al.  An evaluation of nonprecious alloys for use with porcelain veneers. Part I. Physical properties. , 1973, The Journal of prosthetic dentistry.

[18]  Chun-Li Lin,et al.  Numerical simulation on the biomechanical interactions of tooth/implant-supported system under various occlusal forces with rigid/non-rigid connections. , 2006, Journal of biomechanics.

[19]  Murat Cavit Cehreli,et al.  Evaluation of the mechanical characteristics of the implant-abutment complex of a reduced-diameter morse-taper implant. A nonlinear finite element stress analysis. , 2003, Clinical oral implants research.

[20]  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.

[21]  Holmes Dc,et al.  Influence of bone quality on stress distribution for endosseous implants. , 1997, The Journal of oral implantology.

[22]  G E Carlsson,et al.  Bite force and oral function in patients with osseointegrated oral implants. , 1977, Scandinavian journal of dental research.

[23]  G E Carlsson,et al.  Functional state, bite force and postural muscle activity in patients with osseointegrated oral implant bridges. , 1979, Acta odontologica Scandinavica.

[24]  H. Frost,et al.  Wolff's Law and bone's structural adaptations to mechanical usage: an overview for clinicians. , 2009, The Angle orthodontist.

[25]  Dinçer Bozkaya,et al.  Evaluation of load transfer characteristics of five different implants in compact bone at different load levels by finite elements analysis. , 2004, The Journal of prosthetic dentistry.

[26]  Clinton T. Rubin,et al.  Regulation of bone mass by mechanical strain magnitude , 1985, Calcified Tissue International.

[27]  Robert Haas,et al.  A long-term follow-up of 76 Bränemark single-tooth implants. , 2002, Clinical oral implants research.

[28]  M. Çehreli,et al.  The influence of functional forces on the biomechanics of implant-supported prostheses--a review. , 2002, Journal of dentistry.

[29]  P. Krogh,et al.  Osseointegrated implants for single-tooth replacement: progress report from a multicenter prospective study after 3 years. , 1994, The International journal of oral & maxillofacial implants.

[30]  I Herrmann,et al.  Osseointegrated implants for treatment of partially edentulous jaws: A 5 year prospective multicentre study , 1994 .

[31]  R. Aversa,et al.  Influence of tooth preparation design on the stress distribution in maxillary central incisors restored by means of alumina porcelain veneers: a 3D-finite element analysis. , 2005, Dental materials : official publication of the Academy of Dental Materials.

[32]  P Missika,et al.  Optimal implant stabilization in low density bone. , 2001, Clinical oral implants research.

[33]  H Weber,et al.  Biomechanical aspects of two different implant-prosthetic concepts for edentulous maxillae. , 1995, The International journal of oral & maxillofacial implants.