A work on operative dentistry .. / By G.V. Black.

  • Greene Vardiman Black
Date:
1908
Catalogue details

Licence: In copyright

Credit: A work on operative dentistry .. / By G.V. Black. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    and then the incisal edge is squarely grooved across the labial portion of its edge. The cutting upon the fellow central incisor has started in the same way and will follow the same course. A case seen a number of years ago with Dr. Gushing was almost precisely the same as this in figure, except that the groove reach- ing the incisal surface, grooved the incisal surface and then extended to the lingual along the mesial margin of the lingual surface. The teeth were long cusp teeth. They were practically unworn and there was no reason whatever to attribute the groov- ing on the lingual surface to abrasion. Figures 58, 59 and 60 illustrate another case of figure cut- ting that is much more extensive. In this case there was no grooving of the incisal edge, or along the incisal edge, only a slight broadening of the groove on the mesial side, and it will be noted that a similar groove is being cut upon the distal portion of the labial surface, while there is a curious half dish-shaped form on the distal end of the groove running mesio-distally. In this cutting, the angles with the surface of the tooth are very sharp, but the bottoms of the grooves are well rounded. The depth of the cut from the transverse groove to the incisal is shown in Figure 59, while the depth of the cut across the labial surface is shown in Figure 60. It was clearly apparent in examination of the tooth, that the groove running mesio-distally had cut through the calcified pulp. The incisal edge of the tooth had been much worn by ordinary abrasion. The V-shaped cut in the root of the tooth was made with a file for the examination of the pulp canal. In all my examinations of erosion I have never seen a metal- lic filling that seemed to have been cut away by erosion. Years ago I made much trial of gold fillings with a view of arresting erosion, and generally found the erosion progressing beside the filling as though no filling had been placed. The margins of the fillings stood up sharp and definite, showing no rounding. Dr. W. D. Miller, in his recent articles on erosion, claimed to have seen fillings of various sorts cut away by this process. Recently I have met with a case which is presented in Figure 61, in which a gold crown, which had been placed over the first bicuspid, seems to have been cut through. The patient is a dentist, and he tells me that this is the third gold crown that has been cut through at the same point. It was placed over the tooth because it had become quite deeply eroded and was extremely sensitive. The second bicuspid below also is a gold crown, placed for a similar reason. It has shown no signs of injury. It will be
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