This article presents an experimental approach to the geometrical planning of the medial opening wedge high tibial osteotomy surgery which, as it is known, is an efficient surgical strategy quite widely used in treating knee osteoarthritis. While most of the published papers focus on analyzing this surgery from a medical point of view, we suggest a postoperative experimental evaluation of the intervention from a biomechanical point of view. The geometrical planning and, more specifically, the determination of the point of intersection between the corrected mechanical axis and the medial-lateral articular line of the knee, is a problem quite often debated in literature. This paper aims to experimentally investigate the behavior of the tibia with an open wedge osteotomy fixed with a locking plate, TomoFix (DE Puy Synthes), taking into account two positions of the mechanical axis of the leg on the width of the tibial plateau, measured from medial to lateral at 50% and 62.5% (Fujisawa point), respectively. The variations of the force relative to the deformation, strains, and displacements resulting from the progressive loading of the tibial plateau are studied. The research results reveal that using the Fujisawa point is better for conducting the correction not only for medical reasons, but also from a mechanical point of view.
Prematurity is a major health problem and it is an important life-threatening pathology for the children in their perinatal, new-born and infantile period. We have evaluated the epidemiologic factors for prematurity in Obstetrics Clinic of Sibiu city. We have analysed the epidemiology of 649 preterm babies between 2012 and 2019 in a III grade Maternity Clinic concerning general maternal information, pregnancy pathology and delivery. We have found significant differences between single and multiple pregnancies and between natural conceived pregnancies and assisted reproductive techniques conceived pregnancies concerning the maternal age, number of cortisone doses, modality of delivery and significant differences between normal conceived and assisted reproductive technique conceived new born related to maternal age and pregnancy and labor fetal presentations dystocia. As a conclusion, prematurity is induced by high blood pressure, pregnancy bleeding and infectious complications. Prophylactic cortisone is improving fetal outcome and is a routine practice in our clinic.
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