Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . ed from a good roentgenogram. 9 9 9 * b g * A t 0 » V Fig. 91.—Diagram of cross sections of permanent teeth at various points. The successful removal of the debris from a root canal dependsprimarily upon its size; large canals are naturally more accessiblethan the small, tortuous canals, especially those of the mesial rootsof the lower molars, the buccal roots of the upper molars and thoseof the upper first premolars. Curvatures of the roots and thepresence of secondary dentin materia
Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . ed from a good roentgenogram. 9 9 9 * b g * A t 0 » V Fig. 91.—Diagram of cross sections of permanent teeth at various points. The successful removal of the debris from a root canal dependsprimarily upon its size; large canals are naturally more accessiblethan the small, tortuous canals, especially those of the mesial rootsof the lower molars, the buccal roots of the upper molars and thoseof the upper first premolars. Curvatures of the roots and thepresence of secondary dentin materially increase the the process of enlarging the canals numerous complicationsmay arise, among which the packing of debris into the apicalregions of the very fine canals, cutting ledges into the walls of acurved canal and breaking the tip of a broach near a curve arerelatively common occurrences. At the beginning of the operationonly the very finest picks or pathfinders should be employed whichmay be followed with barbed broaches. Binding of the broach12 17s DISEASES OF THE DENTAL PULP. of the pulp chambers of permanenl teethal variousap NECROSIS AND GANGRENE OF THE DENTAL PULP 179 within the canal must be rigidly avoided as breaking of this delicateinstrument by applying undue force is almost certain to occur. Ifa ledge is cut, which is usually the result of using too large a broach,
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Keywords: ., bookcentury1900, bookdecade1920, bookiddiseasesofso, bookyear1922
