Wyniki wyszukiwania - BazTech

1

A new model of bone remodelling

Miodowska J., Bielski J., Kromka-Szydek M.

Engineering Transactions

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2016

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Vol. 64, iss. 4

605--611

EN

The objective of this paper is to propose a mathematical model of bone remodelling, including underload and overload resorption, equilibrium and bone grow states which can occur during healing process. A continuous function of bone density rate vs. mechanical stimulus is proposed. The created model is used to predict the stress-stimulated change in callus density. It is an extension of mathematical descriptions available in literature.

2

Numerical analysis of the mandibular reconstruction with the use of autogenous bone graft and dental implants

Miodowska J., Kromka-Szydek M., Bielski J., Jędrusik-Pawłowska M.

Czasopismo Techniczne. Mechanika

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2016

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Y. 113, iss. 5-M

75--85

EN

The article refers to some issues of the mandible reconstruction in the region of chin with the method involving dental implants introduced for teeth restoration. 12 models are created, which take into account three different graft materials (iliac crest, fibula and rib) and two various implant lengths (13 and 18 mm). The authors try to answer the question how the parameters of the introduced implants affect the distribution of the strain intensity in the mandible, both in the implantation area and at its border with autogenous graft. Also, the distribution of equivalent stress in the reconstruction plate and dental implants is analyzed.

PL

Praca dotyczy problematyki rekonstrukcji żuchwy w rejonie bródki z wykorzystaniem metody polegającej na wprowadzeniu implantów stomatologicznych pod odbudowę uzębienia. W artykule stworzono 12 modeli uwzględniających zastosowanie trzech różnych materiałów na przeszczep (kości biodrowej, strzałkowej i żebra) oraz dwie różne długości umieszczonych implantów (13 i 18 mm). Autorzy podjęli próbę odpowiedzi na pytanie, w jaki sposób parametry wprowadzonych implantów wpływają na rozkład intensywności odkształcenia w kości żuchwy w obszarze implantacji oraz na granicy z przeszczepem autogennym. Analizie poddano również rozkład naprężenia zredukowanego w płycie rekonstrukcyjnej oraz implantach stomatologicznych.

3

Computational problems of FE-analysis of elastic-plastic surface structures

Bielski J, Radwańska M.

Computer Assisted Mechanics and Engineering Sciences

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2001

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Vol. 8, No. 1

17-44

EN

The paper contains a review of problems connected with numerical analysis of elastic-plastic surface structures. Given is detailed information about finite elements as well as about the algorithm of physically non-linear analysis using the incremental-iterative Newton-Raphson method with the consistent modular matrix. The main goal of the paper is to compare numerical results obtained with elements based on either the volume or area approach to the formulation of physical relations. The presented examples are obtained with the use of computer code MANKA. They illustrate some numerical problems induced by elastic-plastic deformation of chosen types of plates.