scholarly journals Revisão por décadas da evolução dos experimentos com o uso de condicionamento ácido sobre o complexo dentino-pulpar

2021 ◽  
Vol 42 (2) ◽  
pp. 20-27
Author(s):  
Elaine Vianna Freitas Fachin ◽  
Jeanne Scheffer Germann ◽  
Marta Liliana Musskopf ◽  
Verônica Mastalir
Keyword(s):  
Experimental Data ◽  
Toxic Effects ◽  
Acid Etching ◽  
Etching Technique ◽  
Permeability Studies

The purpose of this review was to get significant experimental data about the acid etching technique upon the pulpo-dentinal complex highlighting aspects such as pulpal biology and dentinal permeability. Studies since the early 70's, going to 80's and 90's show the value of acid retention as well as the need of protective bases to lower the toxic effects of acid etching.

scholarly journals laser versus conventional acid etching technique on bond strength of orthodontic brackets (An in vitro stydy)

2011 ◽  
Vol 11 (3) ◽  
pp. 124-130
Author(s):  
Khidhair Al–Jumaili ◽  
Abdul– Rahman Ali ◽  
Zaid Ibrahim
Keyword(s):  
Bond Strength ◽  
Orthodontic Brackets ◽  
Acid Etching ◽  
Etching Technique

Enamel Deproteinization and Its Effect on Acid Etching: An in vitro Study

2008 ◽  
Vol 33 (1) ◽  
pp. 13-19 ◽  
Author(s):  
Roberto Espinosa ◽  
Roberto Valencia ◽  
Mario Uribe ◽  
Israel Ceja ◽  
Marc Saadia
Keyword(s):  
Phosphoric Acid ◽  
Sodium Hypochlorite ◽  
Chemical Properties ◽  
In Vitro Study ◽  
Vitro Study ◽  
Acid Etching ◽  
Etching Technique ◽  
Etching Pattern ◽  
Group A

Purpose: The goal of this in vitro study was to identify the topographical features of the enamel surface deproteinized and etched with phosphoric acid (H3PO4) compared to phosphoric acid alone. Materials and method: Ten extracted lower first and second permanent molars were polished with pumice and water, and then divided into 4 equal buccal sections having similar physical and chemical properties. The enamel surfaces of each group were subjected to the following treatments: Group A: Acid Etching with H3PO4 37% for 15 seconds. Group AH1: Sodium Hypochlorite (NaOCl) 5.25% for 30 seconds followed by Acid Etching with H3PO4 37% for 15 seconds. Group AH2 ; Sodium Hypochlorite (NaOCl) 5.25% for 60 seconds followed by Acid Etching with H3PO4 37% for 15 seconds. Results showed that group AH2 etching technique reached an area of 76.6 mm2 of the total surface, with a 71.8 mm2 (94.47%), type 1 and 2 etching pattern, followed by group AH1 with 55.9 mm2 out of 75.12 mm2 (74.1%), and finally group A with only 36.8 mm2 (48.83%) out of an area of 72.7 mm2. A significant statistical difference (P <0 .05) existed between all groups, leading to the conclusion that enamel deproteinization with 5.25% NaOCl for 1 minute before H3PO4, etching increases the enamel conditioning surface as well as the quality of the etching pattern.

Acid-etching technique of non-decalcified bone samples for visualizing osteocyte-lacuno-canalicular network using scanning electron microscope

2017 ◽  
Vol 42 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Tiina Lampi ◽  
Hannah Dekker ◽  
Chris M. Ten Bruggenkate ◽  
Engelbert A. J. M. Schulten ◽  
Jopi J. W. Mikkonen ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Acid Etching ◽  
Etching Technique ◽  
Scanning Electron

scholarly journals Study of domain configurations in (Bi,Na)ZrO3-modified (K,Na)(Nb,Sb)O3 piezoelectric ceramics by acid-etching at different temperatures

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jialiang Zhang ◽  
Chunming Zhou
Keyword(s):  
Domain Structure ◽  
Orthorhombic Phase ◽  
Underlying Mechanism ◽  
Ferroelectric Ceramic ◽  
Acid Etching ◽  
Mathematical Basis ◽  
Etching Technique ◽  
Different Temperatures ◽  
Nanodomain Structure ◽  
Piezoelectric Performance

Abstract Domain structure often greatly affects piezoelectric performance of a ferroelectric ceramic. Accordingly, a convenient method that can well characterize the domain structure at various temperatures is highly desired for understanding the underlying mechanism. An improved acid-etching technique was recently developed for such purpose. Domain structure of poled 0.96(K0.48Na0.52)(Nb0.96Sb0.04)O3–0.04(Bi0.50Na0.50)ZrO3 ceramics with a large piezoelectric coefficient d33 of 535 pC/N was systematically investigated at three typical temperatures. It was found that domain configurations change significantly with temperature. Hierarchical nanodomain structure is widely observed in domain patterns acid-etched at 25 °C, due to the orthorhombic-tetragonal phase coexistence. By contrast, the majority part of those acid-etched at − 60 °C are simply some long parallel stripes, while a small amount of banded structure appears in broad stripes inside some grains. A nearly 63° intersectional angle is seen between two adjacent sets of parallel stripes in the domain pattern of a cuboid-shaped grain, indicating that orthorhombic phase remains down to − 60 °C. The domain patterns acid-etched at 80 °C become even simpler, mainly consisting of long parallel stripes that are several hundred nanometers wide and have quite straight edges. Fundamental issues associating with the possible domain configurations and the acid-etching were discussed on the simple mathematical basis.

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