. The odontographic journal. Fig. I A, Fig. I, is a diagrammatic representation of the grinding sur-face of a molar, containing the filling,// at a is seen a mere line ofdiscoloration at the margin of the filling ; at b^ c, and ^/, this line ismuch darker and broader, and the tooth-substance here seems brokenor disintegrated. At b the edge of the filling is at, and at d isbeyond, the axes of the cusps, and the amount of discoloration anddisintegration is, as seen, proportional to the distances of these pointsfrom the centre of the crown. This figure illustrates the facts towhich I made allusio
. The odontographic journal. Fig. I A, Fig. I, is a diagrammatic representation of the grinding sur-face of a molar, containing the filling,// at a is seen a mere line ofdiscoloration at the margin of the filling ; at b^ c, and ^/, this line ismuch darker and broader, and the tooth-substance here seems brokenor disintegrated. At b the edge of the filling is at, and at d isbeyond, the axes of the cusps, and the amount of discoloration anddisintegration is, as seen, proportional to the distances of these pointsfrom the centre of the crown. This figure illustrates the facts towhich I made allusion before, that as the outline of such a cavityapproaches the vertical axes of the cusps, the conditions favorable to On the Cleavage of Enamel in the Preparation of Cavities. the formation of this defective line are increased ; and that when tliesummits of the cusps are passed the color is deepest in tint, and theenamel breakage at its worst. B, Figure i, is a vertical section through the line b^ d. Here thefilling is seen t
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectdentistry, bookyear18
