Calculus is calcified dental plaque, commonly called tartar, and subgingival calculus is tartar found on the roots of the teeth below the gumline.
Densely means with a lot of things close together.For example: London is a densely populated city.
What does plaque mean
Sparsely means hardly any, or thinly spread. Densely is the opposite.
Fat (cholesterol). Atherosclerosis, or stiffening of the arteries, can cause build-up of fat inside the blood vessel walls, and the fat can become inflamed and calcified. This is called a calcified plaque. If the plaque gets vulnerable, the top of the plaque may rupture and the inside fat comes in contact with the circulating blood. This causes an immediate blood clot. If the plaque is in the coronary arteries, and if the blood clot blocks the coronary arteries, the result is a heart attack.
If they are calcified, such as an aorta that has plaque build up. Abdominal aortic aneurysms can sometimes be seen on xray in this situation. However, in general, arteries do not show up on xray.
I think materia alba is a layer of organic waste (eg desquamated epithelium, blood cells, macrophages) as well as food that forms on top of the plaque layer. It can become calcified and form calculus (aka tartar, aka materia ultima). Its what comes after plaque (aka biofilm) has been formed on the tooth surface and precedes calculus.
In French, the word "plaque" can be translated to mean a plate, a sign, or a patch of something.
Calcified Tissue International was created in 1967.
"une plaque d'immatriculation" is a registration number plate (for your car) in French.
Opacification means to become opaque - not see-through/transparent.
densely means to collide and packed together means to be close. so put it together "collided and close".