Stress distribution in anchoring regions of posts cooperating with overdentures

• Autorzy: Chladek W. , Chladek G. , Krukowska J. , Lipski T.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of model research of mechanical compatibility of selected overdenture structures. The tests based on finite elements method were conducted on flat models reflecting the areas of posts anchoring m a sagittal piane. The reference point was the structure of a prosthesis seated on ball-and-socket joints secured in tooth roots. As altemative solutions, dentures placed on two cylindrical implants supporting ball-and-socket joints were compared with a denture attached to a joint which consisted of a straight axis bar and an elastic clip as well as with a denture supported by a joint of elevated retention, built of a doubly bent axis bar and three elastic bar clips. Taking advantage of the MES Algor program functions, the diverse materiał structures of the systems investigated were modelled. Next. the reduced stresses and principal maximum stresses generated m osseous tissues, in the implants anchoring area. were determined. The value of the mechamcal stimulator decisive to the osseous tissue remodelling was assumed as au evaluatiou criterion. It was assumed that making use of patient's own tooth roots to attach implants IS an optimal solution which, in terms of mechanics, IS practically identical to the alveolodental ligament of a healthy tooth. The application of the other methods of implanted prosthesis attachment always creates a risk of undesirable changes, mostly in the upper area of post insertion into the osseous tissue. The least favourably, in the light of stresses comparison, looks the joint of a doubly refracted axis, where the probability of adverse changes of the osseous tissue in a short time is high. This indicates the necessity to carry on words in order to improve this solution characterized by good retention.

Słowa kluczowe

EN

implant; overdentures; finite element method; reduced stresses; principal stresses

PL

metoda elementów skończonych; implant

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2005
• Tom: Vol. 7, nr 1
• Strony: 35--45
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Chladek W.

• Silesian Technical University [Politechnika Ślaska],Research Group for Medical Engineering, Akademicka 7, 44-101 Gliwice

autor

Chladek G.

• Chair of Metal Alloy and Composite Technology, Silesian Technical University, 40-018 Katowice, ul. Krasińskiego 8, Poland

autor

Krukowska J.

• JOMADENT Denistry Center

autor

Lipski T.

• Chair of Stomatological Prosthetics, Silesian Medical Academy in Katowice, 41-800 Zabrze, ul. 3 Maja 13/15, Poland

Bibliografia

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• [3] SPIEKERMANN H. et al., Implantology, Thieme Medical Publishers Inc., New York, 1995.
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• [10] CHLADEK W., LIPSKI T., Metoda badania sił zgryzu wykorzystująca deformację plastyczną próbek z blachy aluminiowej, Inżynieria Materiałowa, 1998, nr 2.
• [11] CHLADEK W., LIPSKI T., KARASIŃSKI A., Experimental evaluation of occlusal forces, Acta of Bioengineering and Biomechanics, 2001, Vol. 3, No. 1.