Exerted Stresses from Loading Distal -Extension Removable Partial Denture with Different Occlusal Rest Position A Finite Element Stress Analysis Study

Souza Abdul Aziz, Imad Aljoubouri, Wasmaa S. Mahmood


The treatment of distal extension base removable partial denture has long been the dilemma of many Prosthodontists, since the support for this type of restoration is based on two functionally different systems, the teeth and associated periodontal membrane and the edentulous ridges. So one of their most elusive goals were to finish the prosthesis by utilizing both systems of support without exposing the tissues to undue stresses which might lead otherwise to bone resorption.

Material and method: A two-dimensional finite element analysis method was used to assess the stress distribution on supporting structure where different rest position, including mesial-occlusal rest, distal-occlusal rest, and mesio-distal occlusal rest.
The X, and Y coordinate for each node of the model was transferred to the ANSYS program, a load of 10MP was used in this study, where each of the models was subjected to load distributed on the saddle area.

Results: Von Mises stress values revealed that, mesial rest produces less stress concentration

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Simindokht Zarrati1, Mehran Bahrami, Fatemeh Heidari, Jamal Kashani “Three Dimensional Finite Element Analysis of Distal Abutment Stresses of Removable Partial Dentures with Different Retainer Designs” Journal of dentistry 2015;12(6):389-97.

HUEY-ER LEE1,2 JU-HUI WU1 CHAU-HSIANG J E-KANG DU1 “Biomechanical analysis of distal extension removable partial dentures with different retainers “2008 J Dent Sci,


(3) 133-139

Boero E, Forbes W. consideration in design of removable

prosthetic devices with no posterior abutment. J Prosthet

Dent 1972; 28(3): 253-63.

Thomas CJ. The geometry of function of distal extension

base removable partial denture designs. J Dent Assoc.

South Africa 1996;51:815-18.

Kratochvil F. Influence of occlusal rest position and clasp

design on movement of abutment teeth. J Prosthet Dent

; 13(1): 114-124.

Thompson, Kratochvil, Caputo. Evaluation of photoelastic

stress patterns produced by various designs of bilateral distal-extension removable partial dentures. J Prosthet Dent 1977; 38(3):261-73.

Gharechahi J1, Sharifi E, Aghdaee NA, Nosohian S Finite element method analysis of the stress distribution to supporting tissues in a Class IV Aramany removable partial denture (Part I: the teeth and periodontal ligament). J Contemp Dent Pract. 2008 Sep 1;9(6):65-72.

Wakabayashi N1, Ona M, Suzuki T, Igarashi Y. Nonlinear finite element analyses: advances and challenges in dental applications. J Dent. 2008 Jul;36(7):463-71

Eom JW1, Lim YJ2, Kim MJ3, Kwon HB4. Three-dimensional finite element analysis of implant-assisted removable partial dentures J Prosthet Dent. 2017 Jun;117(6):735-742

Sato Y, Tsuga K, Abe Y, Akagawa Y. Finite element analysis of the effect of vertical curvature on half oval cast clasps. J Oral Rehabilit 1999; 26:554-558.

Yang, Lang, Felton. Finite element stress analysis on the effect of splitting in fixed partial dentures. J Prosthet Dent 1999; 81(6): 721-728

O’Grady J, Sherif M, Likeman P. A finite element analysis of a mandibular canine as a denture abutment. Eur J Prosthodontic Rest. Dent 1996; 4(3): 117-121.

Craig G. Restorative dental materials. Tenth edition. Mosby. 1997.

Aleksandar Todorovi, Katarina Radovi, Aleksandar Grbovi, Rebeka Rudolf, Ivana Maksimovi, Dragoslav Stamenkovi” STRESS ANALYSIS OF A UNILATERAL COMPLEX PARTIAL DENTURE USING THE FINITE-ELEMENT METHOD” j materia&technology 2010;(1)41-47.

Jafar Gharechahi, Esmael Sharifi, Saeid Nosohian, Nafiseh Asadzadeh Aghdaee” Finite Element Method Analysis of Stress Distribution to Supporting Tissues in a Class IV Aramany Removable Partial Denture (Part II: Bone and Mucosal Membrane”The Journal of Contemporary Dental Practice, 2008(9), 7.

Verri FR1, Pellizzer EP, Pereira JA, Zuim PR, Santiago Júnior JF. Evaluation of bone insertion level of support teeth in class I mandibular removable partial denture associated with an osseointegrated implant: a study using finite element analysis Implant Dent. 2011 Jun;20(3):192- 201

Ralph w. and Williams F. Analysis of stresses in alveolar bone-A two dimensional photo-elastic model .Arch Oral Biol. 1975;20:411-14.

Asundi A. and Kishen A. A strain gauge and photoelastic analysis of in vivo strain and in vitro stress distribution in human dental supporting structures. Arch Oral Bio. 2000; 45:543-550.

Mustafa Fayad 2010 Partial denture theory and practice p153

Nakamura Y1, Kanbara R2, Ochiai KT3, Tanaka Y4. A finite element evaluation of mechanical function for 3 distal extension partial dental prosthesis designs with a 3-dimensional nonlinear method for modeling soft tissue.J Prosthet Dent. 2014 Oct;112(4):972-80

DOI: http://dx.doi.org/10.26477/idj.v39i3.132


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