Deutsche Stomatologie (Berlin, Germany : 1990)最新文献

The purpose of our study was the culture of cellular elements of the pulp. Migration and proliferation of fibroblast-like cells can be observed during the in vitro culture of pulpal tissue. However, no mitotic acticity of the odontoblasts could be induced by nutritive variations of the culture medium. The proliferation of the fibroblastlike cells varied during the primary culture and the first subculture. By contrast, during the second subculture there is a homogeneous process of growth. The growth rate of the second subcultures is therefore suitable for a biological evaluation of dental materials.

After a period of wear of 2-3 years in 48 adhesive bridges periodontal criteria (SBI and PI) were determined around the abutment teeth and compared with the condition before the insertion of the restaurations. Significant increase in the index values on the oral side of these abutment teeth was found out. Here the distance from the gingiva to the margin of restaurations was smaller than 1 mm.

During six years twenty-five patients have been operated upon using a "sandwich technique" for mandibular alveolar ridge augmentation. This technique was advocated by Schettler in 1974. In 3 cases, autologous rib cartilage was used, in 20 Cases an autologous transplant from the iliar crest and in two cases, autologous "cialit" conserved bone chips were inserted. All transplants healed without complications and less resorption was found in all transplants at the late follow-up examinations.

A new computerized system for jaw movement registration allows a finer diagnosis of TMJ clicks. We recorded jaw movements in patients where we detected reciprocal clicks during clinical examination. We found two different types of derangements: an anterior displacement of the disk (as described by Farrar and a posterior displacement of the disk (similar to description of Klett).

The coordination of masseter muscle contraction is inseparably wrapped up in the occlusal elements. This study measured bilaterally the masseter muscle activity of 22 subjects without temporomandibular joint disease. The EMG recordings of the left and the right masseter muscles were repeated 20 times to test symmetry, reproducibility and appearance of silent periods. In 6 subjects the beginning of the muscle contraction showed laterality characteristics depending on handedness. The complex processes of recorded mandibular movements showed more biological variations than the recording patterns of occlusal indicator foils may disclose. That indicates the possibility of pseudocontact markings. The occluding surfaces therefore should allow free mandibular movements.

Even today you will find again and again extraoral pyorrhea from fistulas, caused by dentogenous infections. From a traditional feeling the above mentioned disease name is very often used. It is necessary to point out that this is a granulating periodontitis, which finds its "way out" into check or chin. The localization frequency in our patients is shown in some cases. Also the therapy is discussed.

25 patients with fibrous dysplasia have been treated surgically between 1980 and 1989. For monostotic manifestations which occurred mostly in the lower jaw, as well as for the follow up control, the conventional x-ray examination beneath anamnestic data was sufficient. Polyostotic extracranial lesions have mainly been diagnosed by scintigraphy. For exact statements about the extend and the involvement of functionally important structures, specially in the orbital and skull base region, CT proved to be the most effective diagnostic method by showing simultaneously bony and soft tissue structures. To our knowledge not yet described in the literature, we diagnosed a manifestation of several cervical vertebrae in one case.

We tested a new diagnostic procedure for the characterization of subgingival plaque in 119 subjects suffering from adult periodontitis. The method can be characterized as a hydrolysis of BANA (N-benzoyl-DL-arginine-beta-naphthylamide) by peptidases of Porphyromonas gingivalis, Bacteroides forsythus and Treponema denticola. The result of a positive will be a more or less blue coloured test paper representing the amount of these three peridontal pathogens into the subgingival plaque. After the periodontal initial therapy the frequency of the positive colour reaction was significantly reduced. A correlation between the colour reaction and the clinical signs of periodontitis as well as the morphological characterization of subgingival plaque by darkfield microscopy could not been found. The new method for the characterization subgingival plaque seems to be useful for the judgement of a successful periodontal therapy at single sites.

In the paper lying before the authors estimate changes of pH-values of the Calcium hydroxide (Calxyd) after contact with a zinc oxide phosphate cement (Adhesor), a polyacrylate cement (Adhesor-Carboxy) and a zinc oxide eugenol cement (Caryosan). The last shoved to be best qualified for over capping of pasty preparation with calcium hydroxide.