Role of Guided Bone Regeneration Principle in Preventing Fibrous Healing in Distraction Osteogenesis at High Speed: Experimental Study in Rabbit Mandibles

2004 ◽  
Vol 15 (6) ◽  
pp. 916-921 ◽  
Author(s):  
Ahmed Elshahat ◽  
Nozomu Inoue ◽  
Guy Marti ◽  
Ikram Safe ◽  
Paul Manson ◽  
...  
2009 ◽  
Vol 80 (2) ◽  
pp. 175-189 ◽  
Author(s):  
G. Greenstein ◽  
B. Greenstein ◽  
J. Cavallaro ◽  
D. Tarnow

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2564 ◽  
Author(s):  
Nazario Russo ◽  
Clara Cassinelli ◽  
Elisa Torre ◽  
Marco Morra ◽  
Giorgio Iviglia

To achieve optimal performances, guided bone regeneration membranes should have several properties, in particular, proper stiffness and tear resistance for space maintenance, appropriate resorption time, and non-cytotoxic effect. In this work, polyphenol-rich pomace extract (PRPE), from a selected grape variety (Nebbiolo), rich in proanthocyanidins and flavonols (e.g., quercetin), was used as a rich source of polyphenols, natural collagen crosslinkers, to improve the physical properties of the porcine pericardium membrane. The incorporation of polyphenols in the collagen network of the membrane was clearly identified by infra-red spectroscopy through the presence of a specific peak between 1360–1380 cm−1. Polyphenols incorporated into the pericardium membrane bind to collagen with high affinity and reduce enzymatic degradation by 20% compared to the native pericardium. The release study shows a release of active molecules from the membrane, suggesting a possible use in patients affected by periodontitis, considering the role of polyphenols in the control of this pathology. Mechanical stiffness is increased making the membrane easier to handle. Young’s modulus of pericardium treated with PRPE was three-fold higher than the one measured on native pericardium. Tear and suture retention strength measurement suggest favorable properties in the light of clinical practice requirements.


2008 ◽  
Vol 49 ◽  
pp. 121-126 ◽  
Author(s):  
François-Xavier Cierco ◽  
Mohamed Naaim ◽  
Florence Naaim-Bouvet

AbstractSpecific features of the physics of blown sand and PVC particles were investigated in wind-tunnel experiments. The fluctuations in particle concentration over time were derived from image processing of high-speed films (500 Hz). Spectral analysis of these time series showed a slowly decreasing slope within a frequency range that could be larger than the inertial sub-range of the free stream. A specific transport regime also appears in the lower part of the flow for frequencies less than 10 Hz. The role of turbulence in the generation of this regime is discussed using a simple theoretical model able to describe the aerodynamic behavior of a particle.


2007 ◽  
Vol 18 (1) ◽  
pp. 86-94 ◽  
Author(s):  
Massimo Simion ◽  
Christer Dahlin ◽  
Isabella Rocchietta ◽  
Andreas Stavropoulos ◽  
Raquel Sanchez ◽  
...  

Odontology ◽  
2018 ◽  
Vol 107 (2) ◽  
pp. 209-218 ◽  
Author(s):  
Mario Pérez-Sayáns ◽  
Alejandro I. Lorenzo-Pouso ◽  
Pablo Galindo-Moreno ◽  
Fernando Muñoz-Guzón ◽  
Antonio González-Cantalapiedra ◽  
...  

2015 ◽  
Vol 41 (4) ◽  
pp. 445-448 ◽  
Author(s):  
Dong-Woon Lee ◽  
Kyeong-Taek Kim ◽  
Yon-Soo Joo ◽  
Mi-Kyung Yoo ◽  
Jeoung-A Yu ◽  
...  

The aim of this study was to elucidate the role of 2 types of collagen membranes (cross-linked vs noncross-linked) used in conjunction with autogenous or allogenic bone followed by xenogeneic bone particles for dehiscence defect around implants in humans. Experimental groups were divided into 2 groups: Group CL (cross-linked, Ossix Plus, n = 24 implants, 16 patients) and Group NCL (noncross-linked, Bio-Gide, n = 25 implants, 18 patients). At the time of implant insertion and uncovery surgery, measurements of the dehiscence bony height, width, and surface area were made. Before applying the membrane to defects, guided bone regeneration was performed. Because it is difficult to measure the degree of exposure, early exposed cases were excluded from the result analysis. The mean percentage gain of the dehiscence defect and the mean marginal bone reduction value of follow-up radiograph did not show statistically significant differences between the 2 groups. Both membranes exhibited satisfactory results on dehiscence defects. As a result, our authors concluded the success of guided bone regeneration was performed simultaneously for dehiscence defects around the implant, regardless whether collagen membranes were cross-linked or noncross-linked.


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