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

The test of the shearstrength of two composite-inlay-materials and two posterior composites exhibited a statistically significant less bond-strength of repaired specimen compaired with unrepaired control-groups, whereas each material showed different results. The indirect-inlay-system proved to have the lowest bondstrength after repairing. The combination of the two posterior composites as well as the two inlay-systems with each other showed that none of these materials was convincing as a repairing material.

The manifold mandibular movements of oral aperture can be modelled by movements of couples in neuromuscular gear systems. These systems consist of the dimeric link chain of the neuromuscular hinge axis (rocking arm) and a neuromuscularly enforced cyclic trajectory of a well-defined point of the mandible. The neuromuscular hinge axis is the common constant of all gear systems whereas the position of the cyclic trajectory at the fixed plane (maxilla) is closely related to the specific path of the entire rigid body mandible. The presented theory is inferred by measurements of the mandible's movement that take all six degrees of freedom into account.

"C31G" means and amine mixture, which shall be, a new "sure" substance of small toxicity and is used as an effective plaque and caries reducing chemotherapeutical substance in a tooth paste. In this study we report on: the caries reducing effect in the teeth cleaning experiment in Osborn-Mendel-rats (96 animals, 6 Groups) with C-31G-containing tooth pastes in different concentrations and also in combinations with and without fluoride. the effect of an 1% C31G-containing tooth paste on plaque formation (SLI + QHI) and gingivitis (SBI) in a clinical double blind cross over-study (section % patients, 2 groups, 2 pre-experimental OH-Plases, teeth cleaning once per day). The study results don't show the expected plaque and caries reducind effect. The results of the in vivo and in vitro experiments call for a critical examination of the substances with attention of further parameters.

On the occasion of the introduction of salt fluoridation in Germany a survey of international results and experiences of salt fluoridation is given. Recommendations for successful caries prevention result from salt consumption dates and previous practice of dental prevention.

The optical fine scanner RM 600 Laser Stylus (Rodenstock) allows in combination with the perthometer S 8P (mechanical scanner, Feinprüf/Perthen) a direct quantitative analysis of elastic impression materials. We verified with this apparatus the accuracy of surface reproduction of thirty-three various impression materials. The mean roughness values (Rz) of the originals and the reproductions showed no significant differences. This result suggests that all materials used have a high surface reproduction and they can be used unrestrictly.

At present diagnosis and therapy of rapidly progressive periodontitis is still difficult in the daily practice. It is possible to define this form of periodontitis by suitable clinical and paraclinical characteristics. In searching a practical therapeutic concept, including effective motivation, first results of a sufficient therapy confirm the possibility of a successful strategy in the treatment of patients with rapidly progressive peridontitis.

The authors describe the clinical, roentgenological findings, especially the oral manifestation and differential diagnosis of histiocytosis X in 23 cases. It is shown that the clinical and roentgenological differential diagnosis is problematically.

Bacterial endocarditis is a disease with high morbidity and lethality. Bacteremia following diagnostic or therapeutic procedures in oral surgery may cause bacterial endocarditis. Patients with certain kinds of heart diseases are at higher risk to develop bacterial endocarditis. Especially these patients have to be protected by means of systemic and local prophylactic regimens.

Two implant materials, titanium and tantalum, were investigated for their electron emission in response to therapeutic tumor irradiation and were compared, in this context, to a substance equivalent to bone. The reaction of titanium was found to be similar to that of bone, whereas substantive increase in radiation was caused by tantalum which, consequently, should be removed from the radiation field.

The results of the regular dental care of 192 mental and physical handicapped patients were analysed in a 5-year-period. The care system in which the prevention, the therapy in narcosis and the annual control are combined is very effective on a long-term basis. The handicapped patients had a lower prevalence of caries, a higher percentage of filled teeth and less extractions compared to a group of handicapped patients without continuous dental care.