A strictly transverse screw trajectory is needed for central or bilateral fracture patterns up to a complete iliosacroiliac fixation. However, secure screw insertion is aggravated by a narrow sacroiliac bone
stock. This study investigates the influence of a highly variable sacral morphology to the existence of S1 and S2 transverse corridors.\n\nThe analysis contained in this study is based on 125 CT datasets of intact human pelvises. First, sacral dysplasia was identified using the “lateral sacral triangle” method in a lateral 3-D semi-transparent pelvic view. Second, 3-D corridors FG4592 for a 7.3 mm screw in the upper two sacral levels were visualised using a proprietary IT workflow of custom-made programme scripts based on the Amira (R)-software. Shape-describing measurement variables were calculated as output variables.\n\nThe results show a significant linear correlation between ratio(T)
and the screw-limiting S1 isthmus height (Pearson coefficient of 0.84). A boundary ratio of 1.5 represented a positive predictive value of 96% for the existence of a transverse S1-corridor for at least one 7.3 mm screw. In 100 out of 125 pelvises (80%), a sufficient S1 corridor existed, whereas in 124 specimens (99%), an S2 corridor was found. Statistics revealed significantly larger S1 and S2 corridors in males compared to females (p < 0.05). However, no gender-related differences were observed for clinically relevant numbers of up to 3 screws in S1 and 1 screw in S2.\n\nThe expanse of the S1 corridor is highly influenced by the dimensions of the dysplastic elevated upper sacrum, whereas the S2 corridor is not affected. Hence, in dysplastic pelvises, sacroiliac https://www.selleckchem.com/products/Cediranib.html screw insertion should https://www.selleckchem.com/products/sn-38.html be recommended into the 2nd sacral segment. Our IT workflow for the automatic computation of 3-D corridors may assist in surgical pre-operative planning. Furthermore, the workflow could be implemented in computer-assisted surgery applications involving pelvic trauma. (C) 2013 Elsevier Ltd. All rights reserved.”
“The
X-ray single crystal structure determination of Lu2O3 sesquioxide and of polycrystalline transparent ceramic fabricated by the unconventional spark plasma sintering (SPS) method is presented for the first time. High quality single crystals of Lu2O3 samples were obtained by using both the micropulling-down (mu-PD) method and the laser heated pedestal growth (LHPG) technique. The SPS method is promising for obtaining high-density ceramics with fine grains at a relatively low temperature within a short holding time. The structural characterizations helped to complete information about the cubic structure of Lu2O3 sesquioxide, not clear until now in the literature from only polycrystalline samples and has raised doubts among many researchers.”
“Purpose of review\n\nContinued hemorrhage remains a major contributor of mortality in massively transfused patients and controversy regarding their optimal management exists.