The Dental cosmos . In the end toward the base of the tusk only an ex- 678 THE DENTAL COSMOS. ceedingly thin layer of conglomerate has been deposited, mostprobably because of the early complete isolation of the diseased partby the stratum primitivum. The bulging of the ivory toward thepulp-chamber at g is here again very marked. Having examined these few specimens, we now ask the question,How are such abscess-cavities in solid ivory to be accounted for? It is more than probable, however, that the reader will have had nodifficulty in framing an answer for himself. The lesson taught by thetwo pr
The Dental cosmos . In the end toward the base of the tusk only an ex- 678 THE DENTAL COSMOS. ceedingly thin layer of conglomerate has been deposited, mostprobably because of the early complete isolation of the diseased partby the stratum primitivum. The bulging of the ivory toward thepulp-chamber at g is here again very marked. Having examined these few specimens, we now ask the question,How are such abscess-cavities in solid ivory to be accounted for? It is more than probable, however, that the reader will have had nodifficulty in framing an answer for himself. The lesson taught by thetwo preparations 44 and 45 is so plain that I doubt if there can be anydifference of opinion regarding it. No one, I think, can have thehardihood to deny that these two abscess-cavities are the result ofdisease of the pulp and not due to inflammatory processes in theivory itself. As for the preparations illustrated in Figs. 43 and 46, those whowould have us believe that these abscesses, at least, were formed by Fig. Fig. 46.—Longitudinal section of an abscess-cavity, with numerous partitions formed byprimitive stratum. (See text.) inflammatory and suppurative processes in the solid ivory, do noteven attempt to account for the constant bulging of the ivory towardthe pulp-chamber. Were we even to acknowledge the truth of thevery doubtful suggestion that this bulging is due to the pressure ofgases accumulating in the abscess-cavity, we would be at a completeloss to tell why the outer wall was not correspondingly driven out-ward. The eburnitis theory equally fails to account for the appearance ofthe centrifugal ivory and the vaso-dentine (Fig. 41, d, e). It also failsto tell us why, for example in Fig. 43, the two walls bordering on theabscess-cavity are equal in width to the wall c, which would not be thecase if the abscess-cavity represented a loss of substance throughsuppuration in the ivory itself. As for myself, after having examined not alone the few specimensillustrated in
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectdentist, bookyear1890
