Chirurgie assistée par ordinateur dans les fractures de l’acétabulum : réduction virtuelle des fractures de l’acétabulum utilisant le premier simulateur biomécanique patient-spécifique

International audienc

Does semi-automatic bone-fragment segmentation improve the reproducibility of the Letournel acetabular fracture classification?

International audienc

La segmentation semi-automatique des fragments osseux permet-elle d’améliorer la reproductibilité de la classification de Letournel des fractures de l’acétabulum ?

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Study of the antideposit effect of 2-Hydroxy-4-methylbenzylphosphonic acid

The scale inhibitor, 2-hydroxy-4-methylbenzylphosphonic acid (HMBP) appears efficient for desalination plants of sea water. A concentration of 26.5 ppm (131 μmol/L) prevents the calcareous magnesium deposits. The anti-scale effect of this inhibitor is achieved by chronoamperometry at imposed potential and complex impedance. SEM allows observation of the calcareous magnesium deposits with and without inhibitor 2-hydroxy-4-methylbenzylphosphonic acid (HMBP

Epidemiology and treatment of acetabular fractures in a level-1 trauma centre: Retrospective study of 414 patients over 10 years

International audienceBACKGROUND:Epidemiological studies of acetabular fractures (AFs) are scarce and, to our knowledge, the most recent one from France, by Letournel and Judet, dates back to 1993. Studies have suggested a decrease in high-energy AFs contrasting with an increase in low-energy AFs due to the longer life expectancy. However, a French case-series study failed to confirm these data. We therefore conducted a 10-year retrospective study in a level-1 trauma centre to: (1) characterise the epidemiological profile of AF; (2) and to describe the treatment strategy.HYPOTHESIS:The epidemiological profile of AF in France is consonant with data from European case-series studies.METHOD:All patients managed for AF between 2005 and 2014 were included in this single-centre retrospective study. All patients were re-evaluated at our centre or another facility 6 months after the fracture. The epidemiological data were compared in the three treatment groups: non-operative, open reduction and internal fixation (ORIF), and total hip arthroplasty (THA).RESULTS:Between 2005 and 2014, 414 patients were admitted for AF. Mean age was 49.4 years (range: 15-101 years). Treatment was non-operative in 231 (56%) older patients, most of whom had low-energy fractures involving the anterior wall. THA with or without acetabular reinforcement and screw-plate fixation was performed in 27 (7%) older patients, most of whom had posterior-wall fractures and experienced postoperative complications (26/27 patients, 96%). ORIF was used in 156 (38%) younger patients, most of whom had high-energy fractures of greater complexity.CONCLUSION:Our results reflect the current indications in AF management. The epidemiological characteristics in our population are comparable to those reported in the few recent European epidemiological studies. To our knowledge, this is the largest French epidemiological study since the landmark work by Letournel and Judet.LEVEL OF EVIDENCE:Level IV, retrospective study

Study and improvement of interfacial properties in a MIS structure based on p-type InP.

Indium phosphide is one of the most promising candidates among the available III-V semiconducting compounds forthe development of MIS technology. This is based on the availability of InP substrates and the relatively large bandgap. Before the deposition of the insulator, the InP surface must be treated and well passivated (Surf Interface Anal 20(1993) 803; J Appl Phys 67 (1990) 4173). We have shown that a InSb buffer layer can reduce the phosphorus atommigration and the concentration of defects at the interface. We have studied and characterized electrically two series ofsubstrates using p-type InP, the first one with thin and the second with thick insulator films. The results obtained showclearly the reduction of the defects in the thicker structures protected by the InSb buffer layer

Conversion paralysis after cervical spine arthroplasty: A case report and literature review

AbstractWe report a case of conversion paralysis after cervical spine arthroplasty performed in a 45-year-old woman to treat cervico-brachial neuralgia due to a left-sided C6–C7 disc herniation. Upon awakening from the anaesthesia, she had left hemiplegia sparing the face, with normal sensory function. Magnetic resonance imaging (MRI) of the brain ruled out a stroke. MRI of the spinal cord showed artefacts from the cobalt-chrome prosthesis that precluded confident elimination of mechanical spinal cord compression. Surgery performed on the same day to substitute a cage for the prosthesis ruled out spinal cord compression, while eliminating the source of MRI artefacts. Findings were normal from follow-up MRI scans 1 and 15days later, as well as from neurophysiological testing (electromyogram and motor evoked potentials). The deficit resolved fully within the next 4days. A psychological assessment revealed emotional distress related to an ongoing divorce. The most likely diagnosis was conversion paralysis. Surgeons should be aware that conversion disorder might develop after a procedure on the spine, although the risk of litigation requires re-operation. Familiarity with specific MRI sequences that minimise artefacts can be valuable. A preoperative psychological assessment might improve the detection of patients at high risk for conversion disorder