scholarly journals The unilateral perforator V-Y flap for fingertip reconstruction–a versatile technique

JPRAS Open ◽  
2020 ◽  
Vol 23 ◽  
pp. 1-7
Author(s):  
A. Appukuttan ◽  
R. Ragoowansi
Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1494
Author(s):  
Mustapha El Hariri El Nokab ◽  
Khaled O. Sebakhy

Solid-state NMR has proven to be a versatile technique for studying the chemical structure, 3D structure and dynamics of all sorts of chemical compounds. In nanotechnology and particularly in thin films, the study of chemical modification, molecular packing, end chain motion, distance determination and solvent-matrix interactions is essential for controlling the final product properties and applications. Despite its atomic-level research capabilities and recent technical advancements, solid-state NMR is still lacking behind other spectroscopic techniques in the field of thin films due to the underestimation of NMR capabilities, availability, great variety of nuclei and pulse sequences, lack of sensitivity for quadrupole nuclei and time-consuming experiments. This article will comprehensively and critically review the work done by solid-state NMR on different types of thin films and the most advanced NMR strategies, which are beyond conventional, and the hardware design used to overcome the technical issues in thin-film research.


2011 ◽  
Vol 493-494 ◽  
pp. 840-843
Author(s):  
Akiko Obata ◽  
Hiroki Ozasa ◽  
Julian R. Jones ◽  
Toshihiro Kasuga

Materials for bone defect filling should have 3D macroporous structure and be flexible to be packed into complex defects with limited entrance space. Tissue engineering scaffolds should also mimic the structure and morphology of the host tissue. Electrospinning is a versatile technique to produce materials with micro/nanofibrous structure, large surface area and high porosity. Electrospun materials are very promising for tissue engineering due to the possibility of mimicking the fibrous structure of natural extra cellular matrix (ECM). Siloxane-containing vaterite (SiV)/poly (L-lactic acid) (PLLA) hybrids (SiPVH) with controlled silicate and calcium ions releasing ability has been produced in our group. They have also demonstrated good cell infiltration into the electrospun hybrid materials that had fiber diameters greater than 10 μm. However, these electrospun hybrid materials were planar (2D) and are not suitable for large defect regeneration. In this work, the development of a fabrication technique for the production of 3D cotton wool-like structures with fiber diameter in the range of 10 μm was performed. SiPVH cotton wool-like structure containing 0, 30 and 60 wt % SiV were prepared by blowing air in the direction perpendicular to fiber spinning. Si-vaterite particles and small pores were found on the surface of the fibers. The fiber diameter of the samples were found to be in the range of 10 ~ 20 μm. Stretch tests showed more than 50 % extension for the SiPVH cotton wool-like material containing 30 wt % SiV (SiPVH30). This extension was similar to that observed for the PLLA cotton wool-like material. The results suggest that the SiPVH30 cotton wool-like material are good candidates for bone tissue engineering scaffolds.


2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Aldo Bonfiglioli ◽  
Renato Paciorri ◽  
Andrea Di Mascio

Within a continuum framework, flows featuring shock waves can be modelled by means of either shock capturing or shock fitting. Shock-capturing codes are algorithmically simple, but are plagued by a number of numerical troubles, particularly evident when shocks are strong and the grids unstructured. On the other hand, shock-fitting algorithms on structured grids allow to accurately compute solutions on coarse meshes, but tend to be algorithmically complex. We show how recent advances in computational mesh generation allow to relieve some of the difficulties encountered by shock capturing and contribute towards making shock fitting on unstructured meshes a versatile technique.


2006 ◽  
Vol 89 (6) ◽  
pp. 1861-1869 ◽  
Author(s):  
Dan Li ◽  
Jesse T. McCann ◽  
Younan Xia ◽  
Manuel Marquez

2000 ◽  
Vol 46 (2-3) ◽  
pp. 193-205 ◽  
Author(s):  
B. Ren ◽  
X.Q. Li ◽  
C.X. She ◽  
D.Y. Wu ◽  
Z.Q. Tian

FACE ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 33-40
Author(s):  
Todd E. Thurston ◽  
James Vargo ◽  
Katelyn Bennett ◽  
Christian Vercler ◽  
Steven Kasten ◽  
...  

Objective: The objective of this study was to evaluate the ability of the buccal fat pad flap (BFPF) to fill the void remaining after muscle transposition and study its effect on durability, fistula rate, palatal shortening/contraction, and relapse of muscle positioning in wide and challenging cleft repairs. Design: A retrospective chart review was performed. Charts were abstracted for standard demographics, reason for BFPF utilization, palatal length, palatal fistula, co-morbidities, and speech outcomes. Patients, Participants: Patients under age 3 who underwent primary palatoplasty between October 2007 and September 2015 which utilized a medially placed BFPF were identified. Results: Fifty-three patients were identified. Mean age at palatoplasty was 1.4 (0.78-2.55) years. Mean follow-up was 2.52 (0.02-7.26) years. Twenty-four (45.3%) patients had concerning intraoperative findings warranting flap utilization. Twenty-nine (54.7%) patients underwent BFPF for large dead-space volume. Four patients (7.55%) experienced a fistula. Thirty-nine patients had comments on their palatal length. Of these, 28 (71.8%) were of average length, and 8 (20.5%) were long. Thirty-three patients have undergone formal speech evaluation. Of these, 20 (60.6%) were of normal resonance, and 12 (36.4%) demonstrated nominal hypernasality. No patients have yet to require a secondary speech operation. Conclusion: Use of the BFPF has become more common in our practice particularly in challenging cleft palate repairs. It is a versatile technique addressing large interpositional dead space and thin outer and inner lamellae in the anterior soft palate after posterior muscle transposition. Early results, in difficult repairs, demonstrate excellent durability and that palatal length appears to be maintained, potentially lessening the need for secondary speech surgery.


1992 ◽  
Vol 90 (6) ◽  
pp. 1009-1021 ◽  
Author(s):  
Yuichi Hirase ◽  
Tadao Kojima ◽  
Shintaro Matsuura

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