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Care has to be taken in handling such material, as it has a strong bond with stainless steel instruments once it sets. [3] Polycarboxylate cement is commonly used as a luting agents or as a cavity base material. However, it tends to be rubbery during its setting reaction and adheres to stainless steel instruments, so most operators prefer not ...
Stainless steel crowns (SSCs), also known as silver crowns were first described in the 1950s by Engel. [3] They exist in different forms, either completely made of metal (preformed metal crowns) or with a layer of composite material covering the metal to improve esthetics (open-faced SSCs or pre-veneered SSCs). [1] [2]
In order to accept a stainless steel crown, the entire occlusal surface should be reduced by 1–1.5 mm and interproximally contacts should be cleared by cutting a thin mesial and distal portion or slice subgingivally by holding the tip of a thin high-speed bur at 15–20° relative to the long axis of the tooth, to avoid the creation of a ...
The stainless steel alloys are of "18-8" austenitic type which contain Chromium (17-25%) and Nickel (8-25%) and Carbon (1-2%). [4] [5] Chromium in this stainless steel alloy forms a thin oxide layer which blocks the diffusion of oxygen into the alloy and allow for the corrosion resistance of this alloy. Angle used stainless steel in his last ...
The superelasticity allows an increase in taper (between 4–8%) compared to stainless steel. This allows an adequate taper of the root canal which takes less time to prepare than with stainless steel and less files needed. The super elasticity also means the risk of zipping and apical transportation is reduced.
Since dental floss is able to remove some inter-proximal plaque, frequent regular dental flossing will reduce inter-proximal caries and periodontal disease risks. [ 1 ] [ 3 ] Results of a high level of evidence meta-analysis recently found that floss may not be the most effective method for interdental cleaning, contrary to common belief at the ...
A 1930s poster from the Work Projects Administration promoting oral hygiene. Tooth decay is the most common global disease. [14] Over 80% of cavities occur inside fissures in teeth where brushing cannot reach food left trapped after eating and saliva and fluoride have no access to neutralize acid and remineralize demineralized teeth, unlike easy-to-clean parts of the tooth, where fewer ...
Straight - bevels the cavosurface margin and used in 3, 4, and 5 classifications of cavities on the maxillary; Wedelstaedt - only used in the anterior for classes 3, 4, and 5; Bin Angle - this is held in a pen grasp and used for class 2 maxillary only
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