PubMed · 4512023
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F Schübel. 1972-12-01. [Patho-histological changes in the tooth supporting structures].. https://pubmed.ncbi.nlm.nih.gov/4512023/
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A three-dimensional representation of an ideal human jaw was reconstructed from a series of 178 digitized photographic cross-sections. The two-dimensional images were taken from the slices of an artificial skull and have been digitized by means of a high resolution scanner with a spatial resolution of 860 dots per inch. On the basis of that sequence of cross-sections, a semi-automatic segmentation algorithm was developed to reduce the information to a quadriliteral surface-representation of the teeth and the bone. An algorithm was developed which simulates the individual pathology of a patient both on the basis of the findings stored in this patient's dental record and by using the representation of the reference jaw. The results of the modeling module were automatically prepared for rendering with visualization tools compatible to the RenderMan standard. This new method of presenting periodontal situations in especially helpful for the diagnostic support of periodontologists and for dental educational purposes.
Root coverage is a common, but challenging goal. The many options in surgical root coverage, their benefits and limitations are explored.
The frequency of gingival overgrowth is increasing, due to the more and more frequent use of cyclosporin and calcium antagonists. Such lesions are the same as those known to occur in patients treated with phenytoin. They appear after a few months of treatment and are favoured by inflammation. Marginal gingiva starts to grow in excess, especially in the anterior region, and might end up covering the teeth entirely, with major occlusal problems. The hyperplasia occurs in about 50% of the phenytoin treated patients and in about 20% of those treated with cyclosporin or calcium antagonists. A genetic predisposition has been thought to be present in such susceptible people. However, no precise pathogenic pathway, possibly common for the three types of drugs, has been clearly proposed. As for therapy, the most severe lesions are treated by surgery but, in general, the dentist can be very helpful by simply stressing gingival hygiene.