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Comparative analysis of unilateral removable partial denture and classical removable partial denture by using finite element method

Radović Katarina (Klinika za stomatološku protetiku, Stomatološki fakultet, Beograd)
Čairović Aleksandra (Klinika za stomatološku protetiku, Stomatološki fakultet, Beograd)
Todorović Aleksandar (Klinika za stomatološku protetiku, Stomatološki fakultet, Beograd)
Stančić Ivica (Klinika za stomatološku protetiku, Stomatološki fakultet, Beograd)
Grbović Aleksandar (Mašinski fakultet, Beograd)

Introduction. Various mobile devices are used in the therapy of unilateral free-end saddle. Unilateral dentures with precise connectivity elements are not used frequently. In this paper the problem of applying and functionality of unilateral freeend saddle denture without major connector was taken into consideration. Objective. The aim was to analyze and compare a unilateral RPD (removable partial denture) and a classical RPD by calculating and analyzing stresses under different loads. Methods. 3D models of unilateral removable partial denture and classical removable partial denture with casted clasps were made by using computer program CATIA V5 (abutment teeth, canine and first premolar, with crowns and abutment tissues were also made). The models were built in full-scale. Stress analyses for both models were performed by applying a force of 300 N on the second premolar, a force of 500 N on the first molar and a force of 700 N on the second molar. Results. The Fault Model Extractor (FME) analysis and calculation showed the complete behavior of unilateral removable partial denture and abutments (canine and first premolar), as well as the behavior of RPD under identical loading conditions. Applied forces with extreme values caused high stress levels on both models and their abutments within physiological limits. Conclusion. Having analyzed stresses under same conditions, we concluded that the unilateral RPD and classical RPD have similar physiological values.

Keywords: unilateral free-end denture, finite element method, stress distribution