. The science and practice of dental surgery. nt of oldlost tissue. Thus, surface ef)ithelium and con-nective tissue cells are remarkably new substance is called granulation tissue,and is found developing in inflammatory pro-liferations that occur in large coronal cavities,principally in the permanent molar series. 316 Clinically, the growth (Roraers Pulpitis granu-lomatosa, 14) is kno\vn as polypus of thepulp—an incorrect but common term. It iscomposed largely of cells of the mesodermictype of variable size, round or oval, deriveddiiectly from pre-existing cells and chieflyconc
. The science and practice of dental surgery. nt of oldlost tissue. Thus, surface ef)ithelium and con-nective tissue cells are remarkably new substance is called granulation tissue,and is found developing in inflammatory pro-liferations that occur in large coronal cavities,principally in the permanent molar series. 316 Clinically, the growth (Roraers Pulpitis granu-lomatosa, 14) is kno\vn as polypus of thepulp—an incorrect but common term. It iscomposed largely of cells of the mesodermictype of variable size, round or oval, deriveddiiectly from pre-existing cells and chieflyconcerned in the formation of the bulk of themass of the new tissue; of the plasma cells ofUmia; of many polymorphonuclear hyalineleucocytes; of large mononuclear hyaline leu-cocytes, which are considered by MetchnikofTto be able to become transformed into fixedcomiective tissue cells; of mast-cells so-called; and, finally, if necrotic material ispresent, or if foreign bodies—e. g. a splinter ofdentine—exist, of multinucleated giant-cells,. Fig. 406.—Cliroaic inflammation of the , Dentine; P, Pulp; E, Epithelium. X 45 whose function is somewhat of a phagocytictype. This granulation tissue undergoes but littlechange after it has once formed. It slowlyincreases in bulk until it may actually riseabove the lunits of the walls of the cavity andextend over its sides. Its free surface usuallyhas upon it some degenerated cells and puscorpuscles; but when it has come into directcontact with the epithelium over the surfaceof the gum near by, either as a consequence ofthe destruction of the dentinal wall beneaththe gingival margm, or as the result of exuberantgranulation tissue spreading itself over thesides of the wall, it acquires an epithelial cover-ing of cells, which may form a single or severallayers, or even copy, with faithful accuracy,the normal oral epithelium of the neighbour-hood. The presence of this adventitious epi- thelium on the surface of a mesodermic bodywas f
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19
