[Development and introduction of zinc phosphate-cement by Silvestre Augustin and Charles Sylvester Rostaing in 1858 in Dresden]
- 1 When was zinc phosphate cement introduced?
- 2 Who invented zinc oxide eugenol cement?
- 3 What is zinc phosphate cement used for?
- 4 Where does zinc phosphate come from?
- 5 Is Zoe hydrophobic?
- 6 What is eugenol cement?
- 7 Is Zoe a bactericidal?
- 8 Is zinc phosphate cement harmful?
- 9 What is the charge of zinc phosphate?
- 10 Is zinc phosphate poisonous?
- 11 How is zinc phosphate applied?
- 12 What’s the difference between zinc and zinc phosphate?
When was zinc phosphate cement introduced?
Zinc phosphate cement was introduced c. 1879, and although the formulation has been refined for more than a century, it is a luting agent that has consistently been successful in clinical practice and even today is still considered the ‘gold’ standard.
Who invented zinc oxide eugenol cement?
The portrait of the inventor Dr. Otto Hoffmann can today still be found in many dental practices around the world. With more than 40,000 ap- plications a day, Hoffmann´s cements are among the world’s most commonly used dental materials for the cementation of crowns and bridges.
What is zinc phosphate cement used for?
Zinc phosphate cement the one of the oldest and widely used cements, and is commonly used for luting permanent metal restorations and as a base. It is a high-strength cement base, mixed from zinc oxide powder and phosphoric acid liquid.
Where does zinc phosphate come from?
Zinc Phosphate is prepared by mixing magnesium oxide and zinc oxide powders consisting of a liquid principally of water, phosphoric acid, and buffers. It is one of the standard types of cement to measure against.
Is Zoe hydrophobic?
The material is fairly stiff but very hydrophilic.
What is eugenol cement?
Zinc oxide-eugenol cement (IRM) is a low-strength base used as a temporary cement filling in the event that the patient will return at a later date for a semi-permanent restoration. The powder is mainly zinc oxide and the liquid is eugenol with olive oil as a plasticizer.
Is Zoe a bactericidal?
The antibacterial effect of ZOE cement is mainly due to leaching of eugenol from the material, but the effect is reported to decrease over time. Results: The present study showed that a ZOE-based material has antibacterial activity both as freshly prepared and after immersion in water for 18 weeks.
Is zinc phosphate cement harmful?
Because of the phosphoric acid liquid, zinc phosphate cement is an irritant, and proper pulp protection is recommended. When experience indicates that sensitivity and pulp response are likely to be problems, the use of cement that is more biologically compatible, such as polycarboxylate cement, is recommended.
What is the charge of zinc phosphate?
Zinc phosphates, having total charge (+2 and +5) similar to aluminosilicates (+3 and +4), are especially interesting. In the past decade, a large number of open-framework zinc phosphates have been prepared by hydrothermal synthesis. Normally, amines are used as the structure-directing agents in the synthesis.
Is zinc phosphate poisonous?
Zinc phosphide is highly toxic in acute exposure to humans. It may be consumed accidentally or intentionally as means of suicidal or homicidal acts. Other routes of entry into the body could be via inhalation or through the skin. Zinc phosphide is hydrolysed by the gastric acid and is transformed into phosphine gas.
How is zinc phosphate applied?
Cold zinc phosphates are applied using brush, spray, dip or flow coating on steel. Hot zinc phosphates are applied by dipping or spraying. It is also possible to apply them using a multi-stage steam spray applicator. The advantage of dipping and spray processes is control of crystalline structure and coating weight.
What’s the difference between zinc and zinc phosphate?
The zinc phosphate is an excellent paint base, the zinc plate is less able to promote adhesion because it is a smoother surface. The zinc phosphate is a stand alone product. It is used to coat military weapons. Combined with the powder coating it should be much superior.