SYNOPSIS IN INTERLINGUA ODONTOBLASTOS HUMAN IN VITRO. 1. LE MESSE DE HOMOGENEE POPULATIONES CELLULAR. -Esseva preparate culturas per bisectionar dentes human longitudinalmente, per discartar le pulpa, e per recolliger le pariete dentinal con le adherente odontoblastos. Esseva observate que iste cellulas esseva elongate proxime al explanation, sed cellulas peripheric deveniva epithelioide post inter 12 e 15 dies in vitro. Figuras mitotic esseva numerose, e un monostrato de cellulas coperiva le fundo del cameras post 30 dies de crescentia. Iste methodo de recolliger grande populationes homogenee de odontoblastos offere un nove systema pro studiar lor capacitates functional.

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Investigators consider plaque to be an early stage of calculus. The plaque matrix may contain a modified protein on which the calculus crystals may form. Another view is that lowering of the pH to 5 or 6 may cause a protein to precipitate on which the calcium crystals deposit. Others are of the opinion that some bacteria may produce a polysaccharide that forms the sticky bulk of the plaque which favors adhesion of bacteria together with acid formation which initiates the formation of calculi. In bone mineralizatipn the crystals are first found to be approximately 300-1500A in length and about 15-75A thick. These grow larger as calcification proceeds.

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