Stomatologie der DDR最新文献

The testet mechanical amalgamators DMG 410 (VEB Dentalfabrik Treffurt) showed sufficient tightness. After dosing and trituration of 5 (during 30 min) and of 25 amalgam mixtures (during 2 hours) an increase of the mercury vapour concentration was measured from 0.003 mg Hg/m3 air of the room (blank value) to 0.008 mg Hg/m3 air of the room and to 0.018 mg Hg/m3 air of the room in an unventilated room. A significant decrease of the mercury vapour concentration could be established within 10 minutes by ventilation of the measurement room.

Three independent examiners evaluated the oral and vestibular plaque-index-rate on all teeth at 100 probands. A 7-grade-index computer-transformed into the plaque-values by Quigley and Hein, Silness and Löe and the debris component of Oral-Hygiene-Index was used. From these tested index-methods the index by Quigley and Hein proved to be the better as to sensibility and reliability in comparison to the other two methods.

In a baseline examination of a preventive study 319 randomly recruited patients of a dental school aged between 16 and 35 years were inquired about oral health behavior and the oral health state was determined clinically. The spectrum of methods included extended anamnesis, plaque index according to Silness/Löe, DMF/T- and GPM/T-index. The health behaviour and the derived preventive and curative care needs show that the majority of patients need individual oral hygiene and nutrition advising, professional oral hygiene measures, fluoride application, as well as filling therapy. Early therapy of periodontitis is of importance.

Based upon innovations in the past 20 years regarding material--as well as surgical techniques indications are given for surgical conservation of teeth, in addition questions of current interest referring to root fillings are answered. Possible ways of tooth conservation by periodontal operations are shown. To conserve traumatically injured teeth guides for emergency treatment are given.

The groups A1 to C3 of the "group classification of partially edentulous arches" by Eichner are characterized by the number of teeth and the topography of the natural dentition. This could be demonstrated in a clinical study on 1000 patients prepared by Blume-Gréger. The result shows a percentage of 49.5 in the groups A, 22.4% in the B-groups and 28.1% in the C-groups. Furthermore, these groups represent the course of tooth loss also regarding the functional value of the natural dentition. Thus, this classification provides a standard for the degree of morbidity of the dentition and is suitable for application in studies on morbidity statistics. When used for documentation files there is an error possibility of 1.9%.

The paper describes experiences of stomatological identification after two air disasters and shows potentialities and limits of an odontologic(al) comparison. The application of a 16-bit-computer is pointed out as the essential improvement of the work.

By means of an indirect measuring procedure applied to 24 teeth including molars and premolars the extent of the teeth's vertical motion has been established. During the first three days after the neutralisation of the antagonistic contacts upon cavity preparation the scale and speed of the axial movement of the teeth were found to be larger than on the following four days (0.102 greater than 0.059 mm). It is recommended to apply cast fillings with a replacement of the occlusive area as quickly after the wax mould as possible because of the diminished gap due to the motion of the teeth.

In this in vitro study the wear resistance and abrasiveness against opposing enamel cusps, marginal adaptation and radiopacity of two experimental composite resin materials were tested. The results indicated that in particular the fine particles hybrid showed low wear. The radiopacity of both materials tested was just acceptable. Marginal adaptation was insufficient in both cases, the reason being most probably the low viscous bonding agent and the polymerization shrinkage. Therefore both test materials are not suitable for use as direct posterior composite fillings.

Considering the importance of radiation protection in dental radiology and the respective legal regulations of the GDR, objectives and contents of basic and advanced training of responsible co-workers in radiation protection are described. Particular organisational aspects regarding training courses in the National Board for Atomic Safety and Radiation Protection are outlined.

There is reported on an epidemiological study to estimate the gerostomatological treatment need by examining in a rural district all people older than 55 years. The studies were carried out in compliance with the WHO-Basic Methods for oral health services. The results demonstrate that the oral health status of the old people is determined by loss of teeth and its functional consequences. Caries, diseases of the oral mucosa and TMJ-disorders are unimportant in the epidemiological point of view. The condition of porsthetic treatment is quantitative satisfactory in the age-groups up to 75 years.