A three-dimension finite element analysis to evaluate the stress distribution in tooth supported 5-unit intermediate abutment prosthesis with rigid and nonrigid connector

ABSTRACT

Objective: The aim of the study is to evaluate the stress distribution in tooth supported 5-unit fixed partial denture (FPD) having tooth as pier abutment using rigid and nonrigid connectors respectively, under simultaneous and progressive loading. Material and Methods: The three-dimensional (3D) finite element program (ANSYS software) was used to construct the mathematical model. Two 5-unit FPD'S were simulated, one with rigid connector and another one with nonrigid connector. For analysis, each of these models were subjected to axial and oblique forces under progressive loading (180, 180, 120, 120, 80 N force on first and second molars, premolars and canine respectively) and simultaneous loading (100, 100, 100, 100, 100 N force on first and second molars, premolars and canine respectively). Results: The rigid and nonrigid connector design have effect on stress distribution in 5-unit FPDs with pier abutments. Conclusion: Oblique forces produce more stresses than vertical forces. Nonrigid connector resulted in decrease in stress at the level of prosthesis and increase in stress at the level of alveolar crest.

Key words:

Connectors - finite element analysis - pier abutment - stress distribution - tooth supported

 

Conflict of Interest

None declared

• REFERENCES

• 1 Oruc S, Eraslan O, Tukay HA, Atay A. Stress analysis of effects of nonrigid connectors on fixed partial dentures with pier abutments. J Prosthet Dent 2008; 99: 185-92
• 2 Badwaik PV, Pakhan AJ. Non-rigid connectors in fixed prosthodontics: Current concepts with a case report. J Indian Prosthet Soc 2005; 5: 99-102
• 3 Savion I, Saucier CL, Rues S, Sadan A, Blatz M. The pier abutment: A review of the literature and a suggested mathematical model. Quintessence Int 2006; 37: 345-52
• 4 Banerjee S, Khongshei A, Gupta T, Banerjee A. Non-rigid connector: The wand to allay the stresses on abutment. Contemp Clin Dent 2011; 2: 351-4
• 5 Shillingburg Jr HT, Fisher DW. Nonrigid connectors for fixed partial dentures. J Am Dent Assoc 1973; 87: 1195-9
• 6 Ferencz JL. The use of non-rigid connectors for long span ceramo-metal fixed partial dentures. N Y J Dent 1978; 48: 287-91
• 7 Markley MR. Broken-stress principle and design in fixed bridge prosthesis. J Prosthet Dent 1951; 1: 416-23
• 8 Rosenstiel S, Land M, Fujimoto J. Contemporary Fixed Prosthodontics. 4th ed.. St. Louis, Mo, USA: Mosby; 2006
• 9 Moulding MB, Holland GA, Sulik WD. Photoelastic stress analysis of supporting alveolar bone as modified by nonrigid connectors. J Prosthet Dent 1988; 59: 263-74
• 10 Awadalla HA, Azarbal M, Ismail YH, el-Ibiari W. Three-dimensional finite element stress analysis of a cantilever fixed partial denture. J Prosthet Dent 1992; 68: 243-8
• 11 Lin CL, Wang JC, Kuo YC. Numerical simulation on the biomechanical interactions of tooth/implant-supported system under various occlusal forces with rigid/non-rigid connections. J Biomech 2006; 39: 453-63
• 12 Lin CL, Wang JC. Nonlinear finite element analysis of a splinted implant with various connectors and occlusal forces. Int J Oral Maxillofac Implants 2003; 18: 331-40
• 13 Schillingburg HT, Hobo S, Whitsett LD, Jacobi R, Brackett SE. Fundamentals of Fixed Prosthodontics. 3rd ed.. Chicago: Quintessence Publishing Co., Inc.; 1997
• 14 Ozcelic T, Ersoy AE. An investigation of tooth/implant-supported fixed prosthesis designs with two different stress analysis methods: An in vitro study. J Prosthodont 2007; 16: 107-16
• 15 Rees JS, Jacobsen PH. Elastic modulus of the periodontal ligament. Biomaterials 1997; 18: 995-9
• 16 Wheeler RC. Dental Anatomy, Physiology and Occlusion. 9th ed.. Philadelphia, PA: Saunders; 1974
• 17 Goodacre CJ, Campagni WV, Aquilino SA. Tooth preparations for complete crowns: An art form based on scientific principles. J Prosthet Dent 2001; 85: 363-76
• 18 Pesun IJ, Steflik DE, Parr GE, Hanes PJ. Histological evaluation of the periodontium of abutment teeth in combination implant tooth fixed partial denture. Int J Oral Maxillofac Implants 1999; 14: 342-50
• 19 Santiago JuniorJF, Pellizzer EP, Verri FR, de Carvalho PS. Stress analysis in bone tissue around single implants with different diameters and veneering materials: A 3-D finite element study. Mater Sci Eng C Mater Biol Appl 2013; 33: 4700-14
• 20 Powers JM, Sakaguchi RL. Craig's Restorative Dental Materials. 12th ed.. St. Louis: Mosby; 2006
• 21 Jenkins GN. The Physiology and Biochemistry of Mouth. 4th ed.. Oxford: Blackwell Scientific Publication; 1978
• 22 Lin CL, Wang JC, Chang WJ. Biomechanical interactions in tooth-implant-supported fixed partial dentures with variations in the number of splinted teeth and connector type: A finite element analysis. Clin Oral Implants Res 2008; 19: 107-17
• 23 Holland GA, Sluder TB, Sutherland JK, White JT. A photoelastic analysis of the stress distribution in bone supporting fixed partial dentures of rigid and non rigid design. J Prosthet Dent 1980; 44: 616-23
• 24 Misch CE. Dental Implant Prosthetics. St. Louis: Elsevier, Mosby; 2005: 189-90
• 25 Moreira W, Hermann C, Pereira JT, Balbinoti JA, Tiossi R. A three-dimensional finite element study on the stress distribution pattern of two prosthetic abutments for external hexagon implants. Eur J Dent 2013; 7: 484-91
• 26 Eraslan O, Inan O, Secilmis A. The effect of framework design on stress distribution in implant-supported FPDs: A 3-D FEM study. Eur J Dent 2010; 4: 374-82