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2 2006

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Compression creep properties of compact bone tissue

Veide Z., Dobelis M., Knets I., Laizans J., Vitins V.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

2006

z. 26

371-376

A satisfactory finite element analysis model of the human mandibular and dentition system besides the detailed 3D geometry and static elastic properties should also consider time-dependent mechanical properties of different components of the jaw bone. Compact bone tissue plays the major role in this time dependence. The aim of the work was to investigate the active creep of the compact part of human mandibular bone. Creep tests of 15 specimens were conducted at room temperature, with applied constant compressive stresses between 5 and 40.8 MPa. The obtained results were approximated with exponential function. Average values of the creep properties of human jaw compact bone tissue for 5 specimens group were achieved.

Bond strength of implant to the bone tissue and the stress–strain state of “bone–implant” system by the finite element method

Filipenkovs V., Laizans J., Knets I.

Acta of Bioengineering and Biomechanics

2006

Vol. 8, nr 2

19-26

Two types of new composite implant materials are investigated. Their mechanical characteristics and biocompatibility are determined. The first type of the biomaterials is based on silicate glass (SG) and hydroxyapatite. Both the natural (NHAp) and a synthetic (HAp) hydroxyapatites were used. The second type of the biomaterials was made of an ultrahigh-molecular polyethylene (UHMPE) and the NHAp. Composite materials of both the types were implanted into the rabbit femur. The bond strength between the bone tissue and the implants was determined in 2, 4, 10, and 25 weeks. The stress–strain state of bone–implant system was determined by the finite element method (FEM).