. Oral pathology and practice. A text-book for the use of students in dental colleges and a hand-book for dental practitioners. ferred, then, that the sensitiveness ofeither dentine or tooth pulp may be the direct result of irritation,and the inceptive stage of an inflammatory process; that sensitive-ness of dentine is but the result of that abnormal, irritative, in-flamed condition; that the peculiar phenomena presented are due tothe modified blood and nerve supply, and that in its normal andhealthy state it may be quite irresponsive to external impressions; PULPITIS INFLAMMATION OF THE DENTA
. Oral pathology and practice. A text-book for the use of students in dental colleges and a hand-book for dental practitioners. ferred, then, that the sensitiveness ofeither dentine or tooth pulp may be the direct result of irritation,and the inceptive stage of an inflammatory process; that sensitive-ness of dentine is but the result of that abnormal, irritative, in-flamed condition; that the peculiar phenomena presented are due tothe modified blood and nerve supply, and that in its normal andhealthy state it may be quite irresponsive to external impressions; PULPITIS INFLAMMATION OF THE DENTAL PULP. IO5 that any special responsiveness of either of the tooth tissues to ex-ternal impressions is an indication of a pathological condition, andthat in treatment this should always be kept in view. The pathological changes presented and the phenomenaexhibited in inflammation of the tooth pulp will differ from thecorresponding phenomena in most other tissues just so far as thestructure of these latter is varied and their environments are modi-fied by the tissues with which they are in relation. The peculiari- Fig. Congestion of the Bloodvessels of the Tooth Pulp of a Dog afterthe Application of Arsenous Acid. ties of the nerve supply will change the character of sensation,while the special vascular system will cause a variation in thephenomena presented in the earlier stages of inflammation, andmaterially modify diapedesis. Proceeding upon this hypothesis, itis not difficult to comprehend some things heretofore unintelligiblein the pathology of the dental pulp, and to find indications that mayce a more complete guide in diagnosis and treatment. A specially sensitive tooth is one whose tissues are in anirritable condition, and this is either the initial step in, or a 106 ORAL PATHOLOGY AND PRACTICE. positive stage of, an active inflammation. The irritant may beany one of a long list, and may have its origin either in some-organic change, in a mechanical injury, or in so
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