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

The prosthetic management of edentulous patients with skeletal dysgnatism is difficult. Surgical treatment as Le-Fort-I-osteotomy or sagittal split and rigid fixation with plates can be helpful. Technique, indications and additional procedures are introduced in two clinical cases.

Indication, contra-indication, and course of treatment with hemisection are presented. Apart from that principles on dental-arch prosthetic treatment of a hemi-dissected tooth are particularly mentioned here. On the basic of own experiences with 21 treatments can be said the prognoses is good.

The contents and aim of a software program for the prosthodontic will be described for a diagnosis and expiration documentation in the prosthodontic field. The basis documentation and the construction of the dispensary-group-system will be explained. It will be concluded by the estimation.

The pattern of restorative therapy with amalgam of 38 thuringian dentists were checked up over a period of 4 weeks. The indications of the 3644 in these time applicated amalgam restorations were in 42% of all cases primarily caries, in 22% secondary caries and in 24% noncaries caused reasons. Occlusal caries was dominant in adolescents and young adults. Patients older than 24 years had a higher risk of approximal caries and root caries is becoming a clinical problem in patients older than 54 years. 61% of the replaced amalgam restorations have had a function period over 5 years. Prevention, early restorative therapy and consequently a recall system in connection with correct indication are the most important factors for a long time of amalgam restorations and successful dental treatment.

Benign and malign forms of tumors of the peripheral nervous system also occur in the region of jaw and face. They demonstrate a quite different dignity and different courses. Very well known is the neurofibromatosis (Recklinghausen) which can be observed in several variants in face. The possibility is pointed out that primarily benign tumours of the peripheral nervous system may be degenerated to malign ones and the course as well as the therapy with benign and malign tumours are being described.

The free movements of mandibular, oral apertures can be related to the couples' movements of neuromuscular throttle cranks which reveal a common specific property: a double dead position of the mandible (couple). As the neuromuscular system uses the same cyclic path of a well-defined mandibular point for the opening and the closing process of a specific mandibular movement, the mandible can follow the same or two different trajectories although the positive drive works on. The different movements of oral aperture are related to the geometrical positions of the cranks at the fixed plane. Geometrical properties and measures of the gear systems of eleven class-I-patients are reported and discussed.

The physical properties of 12 investment materials produced in middle- and east european countries were tested with methods as usual in experimental practice. At that the following properties were evaluated: grain-size distribution by screen-analysis, setting behavior by penetration, setting and thermal expansion, primary and secondary hardness and porosity by water-absorption. On the basis of the results the tested materials are valuated.

The tertiary maturation of the erupting tooth needs much more time than it is supposed in literature. Possibly the completion is in accord with the decline of the caries activity at the end of the second decade of lifetime. With the aid of polarizing microscopy, electron microprobe, microhardness testing (Vickers) and scanning electron microscopy different stages of posteruptive maturation from human and other mammalian teeth were analysed. The mineralization level in the outer surface of human enamel is completing little by little in more than 5 years after eruption. This state is in the ruminant tooth obvious never within reach in consequence of the specific physiological conditions. The maturating mineralization after our preliminary findings is fundamentally different to remineralization.

In the present study reexaminations of 28 cantilever bridges and 26 conventional bridges were carried out. The aim was to evaluate the periodontal conditions and to give recommendations for use. Parameters were PI, GI, tooth mobility, pocket depth, gingival recession and BOP. Deducing from the results, which were statistical analysed, we recommend the cantilever bridges by right using. Special attention should be directed to antagonistical dentition.

86 patients with dentofacial anomalies were examined to evaluate signs and symptoms of the stomatognathic system after orthognathic surgery. Clinical signs and symptoms were graded according to the anamnestic and clinical dysfunction index of Helkimo. Restriction of mouth opening in 37 patients influenced the anamnestic dysfunction index mainly to higher postoperative levels although the occurrence of symptoms as pain and tmj sounds decreased. No relationship between tmj pain-dysfunction and type of dysgnathia, surgical approach, molar support before and after surgery, age and sex was noted. It is concluded that surgical correction of dentofacial anomalies has a possible benefitialeffect on certain symptoms as tmj pain, but relief or impairment of clinical signs cannot be predicted preoperatively.