1,722,235 research outputs found
Application of One Piece Autologous Rib Cartilage Graft in Hollow Space of Complete Naso-Ethmoid Orbital Fracture
No full textBACKGROUND: Complete naso-orbital-ethmoid (NOE) complex fractures including hollow space defects are difficult to treat. A proper bone fragment should be maintained for bony rearrangement and reconstruction; however, no guidelines are available for the treatment of the NOE complex. In patients with empty bone fragment from NOE fractures, implantation of autologous rib grafts may be an option for recreating the orbital rim. METHODS: A 57-year-old man with open complete NOE fracture. Computed tomography (CT) revealed complete loss of bone fragments within the NOE area, including the inferior orbital rim and maxillary wall. A bone was harvested from the right fifth rib. The grafted bone mimicked the inferomedial orbital rim and was stabilized with mid plates. RESULTS: Follow-up CT and three-dimensional (3D) volumetry were performed at 1, 3, 6, and 12 months. A well-positioned rib graft and orbital wall were observed. In 3D volumetry analysis, we noted that the absorption rate of the rib cartilage was 7.84% at 6 months. The absorption rate of rib cartilage was evaluated using CT images, which were reconstructed with a 3D image reconstruction program (Alpha-VIEW, Coreline soft, Seoul, Korea). CONCLUSIONS: Complete NOE fractures, especially fractures involving loss of the buttress for plating, may pose a burden to surgeons. In such cases, implantation of an autologous rib cartilage graft is a good option for bony frame reconstruction, without any concerns of bony resorption
Hydrogenation of Aryl Ketones Using Palladium NanHydrogenation of aryl ketones using palladium nanoparticles on single-walled carbon nanotubes in an ionic liquid
No full textSingle-walled carbon nanotubes (SWNTs) are used as supporting materials for palladium (Pd) nanoparticles generated in situ in ionic liquid (IL); Pd nanocatalysts on SWNTs exhibit superior reactivity for hydrogenation of aryl ketones in IL under mild conditions (1 atm of H-2 (g) and room temperature) and can be reused above 10 times without any loss of catalytic activity. (C) 2010 Elsevier Ltd. All rights reserved.X119sciescopu
Activity of α-Chymotrypsin Enhanced in the Presence of Iron Oxide Nanoparticles in Organic Solvent:
No full textX1122sciescopuskc
Room Temperature Solid-Phase Ionic Liquid-Immobilized Enzyme for Biocatalysis in Organic Solvent: Markedly Enhanced Enantioselectivity
No full textX1144sciescopuskc
SYNTHESIS OF OPTICALLY PURE (R)-2-HYDROXY ACIDS USING D-LACTATE DEHYDROGENASE
No full textSeveral (R)-2-hydroxy acids have been prepared in high optical purities and good yields using D-lactate dehydrogenase (Staphylococcus epidermidis) as the catalyst.open1121sciescopu
Total nasal reconstruction with a forehead flap: Focusing on the facial aesthetic subunit principle
No full textThe nasal aesthetic subunit principle has been widely accepted as the standard for nasal reconstruction with forehead flaps. However, in our experience, one's impression of a reconstructed face can easily be represented by the nose's entire appearance rather than a single nasal component. Accordingly, we hypothesized that total nasal reconstruction focusing more on the facial aesthetic subunit principle would be superior to focal nasal subunit partial reconstruction. Here, we investigated the indication range of total nasal reconstruction and analyzed its effectiveness. Between July 2006 and December 2017, 32 patients who underwent total or subtotal nasal reconstruction were recruited. The total nasal reconstruction group (n = 20) was treated according to our modified facial aesthetic unit concept, while the subtotal reconstruction group (n = 16) was treated according to the nasal aesthetic subunit principle. Using retrospective reviews, we compared surgical details and aesthetic, and functional outcomes with visual analog scale scores. In aesthetic evaluation, nose contour (p = 0.009), nasal symmetry (p = 0.001), and nostril shape (p = 0.041) were superior in the total nasal reconstruction group. Satisfaction regarding the nose (p = 0.036) was significantly higher than that regarding the forehead and labial folds in the total group. Regarding function, there were no significant intergroup differences in nasal airflow, snoring, or olfaction. We suggest that total nasal reconstruction is not a strategy to avoid because of its aggressive nature. For selected suitable patients, the use of the total nose reconstruction focusing on our one nose concept can be a successful surgical option, and the reconstructed nose can be visualized as a real part of the face
Synthesis of unsaturated C-8-C-9 sugars by enzymatic chain elongation
No full textthe syntheses of several unsaturated C-8-C-9 sugars have been accomplished by employing an enzymatic chain elongation based on rabbit muscle aldolase as the key step.open112sciescopu
COMBINED CHEMICAL AND ENZYMATIC-SYNTHESIS OF (S,S)-2,5-DIMETHYLPYRROLIDINE
No full textThe title compound has been synthesized from a mixture of three stereoisomers of 2,5-hexanediol by using combined chemical and enzymatic methods.open1130sci
Assessing the Viability of Polycaprolactone Mesh in Bilateral Orbital Floor Reconstruction: Insights From Le Fort II Fracture Cases
No full textObjective: This study aims to evaluate the effectiveness of pure polycaprolactone (PCL) mesh in reconstructing complex bilateral orbital floor fractures associated with Le Fort II fractures. PCL mesh is traditionally viewed as less suitable for severe fractures due to its perceived weakness. This study challenges that perception by demonstrating the utility of PCL mesh in high-severity cases. Materials and Methods: Two patients with Le Fort II fractures and bilateral orbital floor fractures underwent orbital reconstruction using a 3D-printed PCL mesh. The mesh was molded and inserted through subciliary or transconjunctival incisions. Orbital volumes were analyzed preoperatively and postoperatively using CT scans and a 3D Analysis program. Results: Both cases demonstrated significant correction of orbital volume differences postoperatively, leading to improved symmetry and successful reconstruction. For case 1, the preoperative orbital volume difference of 3.2 cc was reduced to 1.1 cc postoperatively. For case 2, the preoperative orbital volume difference of 1.18 cc was reduced to 0.4 cc postoperatively. The PCL mesh provided adequate structural support and facilitated effective tissue integration. Despite the radiolucency of the PCL mesh on CT scans, volumetric analysis confirmed stable and balanced orbital volumes. Conclusions: Pure PCL mesh is a viable alternative for orbital floor reconstruction in severe craniofacial fractures, offering a balance of structural support and biocompatibility. To validate these findings, further research with larger samples and long-term follow-up is recommended
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