Examination of the mechanical properties of impacted morsellised bone grafts
Journal Title: Ortopedia Traumatologia Rehabilitacja - Year 2005, Vol 7, Issue 5
Abstract
Background. In order to successfully apply the technique of impacting morsellised bone grafts in order to fill out bone defects, it is essential to determine the mechanical properties of the grafts. The aim of our study was to determine the type of forces enabling optimal graft impacting (static or dynamic forces), the force values needed for bone graft impacting, the number of impacting cycles needed to obtain a homogenous medium of a definite biomechanical strength, and the properties of the osseous bed after impacting, when exposed to forces similar to those to which the joints are subjected after surgery.Material and methods. The tests were carried out on a strength-testing stand based on the INSTRON 8501 Plus universal strength-testing machine. The tests were performed with both static and dynamic cyclic loads applied to grafts 2 cm thick.Results. In tests of static loads, the greatest displacement of the rammer was observed during the first attempt to knead the grafts with a force of 2 kN. The dynamics of the graft impacting process decreased rapidly in successive cycles and stabilized after ten cycles. A slight increase of rammer displacement was observed. Conclusions. The results from the static and dynamic tests demonstrate that both the value and the character of the force applied influence the mechanical properties of the bed made of frozen bone grafts. Significantly better quality of impacting was obtained with dynamic compacting of the grafts than with application of the same force in a static character. With cyclic impacting of the bed, only the first dozen or so cycles were effective, and further action was of an elastic strain character and failed to improve the quality of impacting.
Authors and Affiliations
Janusz Płomiński, Zbigniew Watral, Krzysztof Kwiatkowski
Keywords
Related Articles
- EP ID EP56364
- DOI -
- Views 101
- Downloads 0
MIGRATION OF KIRSCHNER WIRE INTO THE SPINAL CANAL AS COMPLICATION OF INVETERATE SHOULDER LUXATION TREATMENT – CASE STUDY
ABSTRACTWe report a case of intrathoracic migration of a Kirschner wire used for inveterate anterior right shoulder luxation penetrating the spinal canal through the right Th8 nerve root foramen. The migration was asympt...
Computed Tomography in Evaluation of Revision Hip Arthroplasty Outcomes
Background. This study aimed to assess contact between Recon Shell reinforcement cages used in revision hip arthroplasty and the bony base. Radiographic examinations were performed with the use of multi-energy computed t...
Czynniki biomechaniczne w etiologii skolioz tzw. idiopatycznych; dwie grupy etiopatogenetyczne deformacji kręgosłupa
Wstęp. Praca podaje podstawowe informacje dotyczące biomechanicznej teorii etiologii skolioz tzw. Idiomatycznych.Materiał i metody. Autor przedstawia analizę materiału 434 dzieci ze skoliozami ocenianych i leczonych w la...
Tłumaczenie, adaptacja kulturowa i walidacja polskojęzycznej wersji kwestionariusza Foot and Ankle Outcomes Questionnaire
Wstęp. W polskojęzycznej literaturze brak jest narzędzia umożliwiającego pomiar wyników leczenia w obrębie stawu skokowego i stopy na podstawie opinii pacjentów.Materiał i metody. Dokonano zgodnego z zaleceniami przekład...
„Contracture syndrome” in newborns and infants according to Prof. Hans Mau as an explanation of the „geography” and certain clinical features of idiopathic scoliosis
Background. Many malformations and dysfunctions of the skeletal system are connected with the „contracture syndrome” described by Prof. Hans Mau. The clinical features include plagiocephaly, torticollis, infantile scolio...