Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Powiadomienia systemowe

Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: biomechanical stability

Sortuj według:

Ogranicz wyniki do:

Biomechanical criterion of dynamic stability based on ZMP formula and Flash-Hogan principle of minimum jerk

Ilewicz Grzegorz, Mrozowski Jerzy, Awrejcewicz Jan, Zagrodny Bartłomiej, Ludwicki Michał

Journal of Theoretical and Applied Mechanics

2023

Vol. 61 nr 1

3--9

The main aim of the article is to define a criterion of dynamic stability based on the Flash- Hogan principle and the ZMP method. The gait researches were focused on analysis and observation of the human biomechanism with the optical system Optitrack. The smooth reference trajectory is defined forming a stability pattern. The optimal, due to the minimum jerk criterion, ZMP trajectory is illustrated in the results Section in order to demonstrate the dynamic stability pattern for the needs of rehabilitation in cases of neuromuscular damage or injuries affecting gait stability.

Biomechanical criterion for selecting cancellous bone screws: arthrodesis in the hindfoot

Reihsner R., Huber W. O., Beer R.

Acta of Bioengineering and Biomechanics

2007

Vol. 9, nr 2

27-33

The aim of the paper was to compare primary biomechanical stability of different arthrodesis screws (7.3 mm AO screw with and without washer, 6.5 mm Herbert screw and 6.5 mm Ideal Compression Screw (I.CO.S)). The work necessary to achieve an adequate compressive force with them was compared to the measurement with the AO screw with washer, because this method is for the time being the most commonly used one and is called the golden standard. Compressive force was measured indirectly, via screw tension measurement, with strain gauges method. From the measurements we calculated the work to reach a limit of 60 N and the ratios corresponding to the value of the golden standard: I.CO.S (35.2%), Herbert (89.0%), AO-screw without washer (116%). The I.CO.S showed superior results. Only in the case of extremely poor bone quality, a clear advantage of I.CO.S could be expected in practice.