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Biomedical subjects

K Eichner

Publications and source records attributed to K Eichner.

At least 55 records · Page 3Linked to original sources
PubMed1979

[Determination and position of the masticatory surface complex and clinically necessary corrections (with special regard to Fehr's calotte articulation)].

The individual calotte articulation recommended by C. U. Fehr in 1947 has been used at the Free University of W. Berlin for clinical teaching since this time. The following studies were described and/or recalled and contrasted with other methods for determining position: 1. Studies of Grabert mandibular posture compared with the Ivo-Tray model. 2. Stoebe's studies of calottes with various radii, 3. Eichner's and Schmitthelm's roentgencinematographic studies, 4. Reese's study of biting force, 5. Husemann's comparison of different relational determinations, 6. Sauer's study of the success of reocclusion. Based on the clinical results and also the results of difficult comparative studies. we see no reason to depart from functional determination of relation using calotte-shaped, curved wax walls. Clinical example of the grinding surface complex, which is part of the method, guarantees construction of the complete denture within the range of tissue adaptation. No elaborate apparatuses are required. Even complicated tracing methods do not eliminate the possibility of additional work (e.g., removal of pressure areas, reocclusion).

Dental Impression Technique↗
PubMed1979

Conservative and prosthetic rehabilitation procedures in the dentition of old people.

The therapeutic possibilities of conservative and prosthetic rehabilitation procedures are set out in this survey. In particular the aim was to find out whether these are suitable for retaining functional dentition into old age. The anatomical characteristics (Figs. 1 and 3) and secondary dysgnathic alterations of the dentition in the period of senescence make dental therapy considerably more difficult. The tooth-coloured filling materials do not behave as permanently in the mouth as could be wished. They are unsuitable for use in posterior teeth, and are in urgent need of improvement. The amalgam filling should still be regarded as the agent of choice for treatment of the cheek teeth, although cast precious metal inlays have been successful over a long period of time (Fig. 6). Too little use is made of veneer crowns in the anterior area with increasing age (Fig. 7), although the prospect of long term success is good. It was possible to establish statistically that tooth-coloured plastics are inferior to ceramic and metal ceramic crowns because of the greater retention of plaque. Ceramic should accordingly be preferred even with bridges in the anterior area. The replacement of missing teeth with removable partial dentures is the typical method of dental treatment for the period of senescence (Figs. 10-12). An attempt was made by bringing together various principles of planning and construction to lay down guidelines for dentures in older patients. With prosthetic care the fact that there are large differences in the physical and mental vitality of the older person, and that vitality frequently decreases rapidly for the most varied reasons, should not be overlooked. Even at this stage dentures should still prove functional.

Adult↗
PubMed1978

[Orientation studies on the stability of metal-ceramic crowns made from new materials].

Materials for metal-ceramic crowns have been developed further in the last few years and the use of this type of crown increases steadily. Numerous investigations concern themselves with binding and other properties of this material as well as with its favourable moulding capacity. The present investigation is oriented towards establishing the order of magnitude and limits of confidence of fracture resistance which has to be reckoned with when using a metal-ceramic crown in the mouth.

Crowns↗
PubMed1975

[Prosthetic rehabilitation of dysgnathic patients].

There are only few reports on the prosthetical care of patients with dysgnathias. Thus, it seems appropriate first to delimit the field by well-defined terms from maxillo-facial surgery and orthodontics. Reichenbach, Köle, and Brückl introduced the term "principal symptom" ("Leitsymptom") for the most significant dysgnathic finding. With a view to prosthetical aspects, this term is broadened to include primary and secondary dysgnathias, after several proposals of nomenclature were made. It is reported on the number of dysgnathic patients needing treatment. The description of some of the goals aimed at by prosthetical care concludes the paper.

Dental Occlusion, Balanced↗
PubMed1975

[Prosthetics and prevention of periodontal diseases].

This paper gives a survey of the present knowledge regarding prosthetical treatment under the aspects of preventing periodontal disease. This survey is based on the German publications mainly of the past ten years. In the beginning, the prevention of periodontal disease is weighed against the requirements of caries prophylaxis. Then the requirements of periodontal hygiene are described that are inevitable for the beginning of treatment as well as for the dentures themselves. The marginal periodontium that is in contact with the margin of the crown is generally regarded as an area of minor resistance, therefore particular attention should be given to this point of contact. Construction of removable, partial dentures for partially edentulous jaws is also discussed in detail. Final conclusions show that our knowledge in this specific field has been broadened.

Denture Design↗
PubMed1975

[Effects of bridge parts on the gingiva].

Over the past few years, preparation and insertion of a dental bridges have been considerably modified and rationalized due to new methods and techniques. The former requirements the shape of pontics hat to meet are no longer fully valid. The behavior of the various materials (metals, resins, ceramics) in the mouth and especially towards the gingiva has been tested sufficiently. Knowledge regarding the functional conditions (flushing of the gingiva underneath bridges, turgor, abutment mobility, pulsation) has considerably increased in the past few years. Therefore recommendations regarding the shaping of pontics can be formulated that meet the anatomic, physiologic, and hygienic conditions as well as the esthetic wishes of the patients.

Dental Materials↗
PubMed1975

[Measurement of the pressure in dental casting].

The tests showed that the pressure exerted on the tooth stump and the surrounding tissue is determined by the consistency of the impression material, the amount escaping from the impression tray, the adaptation pressure and adaptation speed. The original consistency of the impression material without exposure to a catalyst is an especially important factor. If the material has a flow limit (e.g. Optosil with or without catalyst) it is exerting pressure in any case and this pressure continues even after setting. Impression materials without flow limit (e.g. Silaplast without catalyst) produce practically no pressure. Only by the activity of the catalyst a flow limit develops and thus pressure is produced.

Dental Casting Investment↗