[Retention of a plastic incisor crown by means of acid etching or by parapulpal screw-retained pins]

According to our in vitro experiments, a combination of caustic acid and the brush technique with peripulpar screw dowels appears to be the method to be recommended for the optimal plastic build up of anterior teeth.

[Liability claims for prosthetic treatment]

Liability claims of 153 patients receiving prosthetic treatment were organized according to damage and were discussed on the basis of the known decisions and judgements of the courts.

[Evaluation and habits of wearing model cast prostheses--results of an inquiry among patients]

An evaluation was made of 1246 questionnaires. A difference could be established between patients wearing prostheses for the first time and patients wearing prostheses over a long period of time. No differences were demonstrable between men and women. Age-related differences could not be determined, the treated jaw did not influence the evaluation, and there was no relationship between the type of prosthesis and the subjective statements given by the patients.

[Preparation and impression in crown and bridge prostheses]

The dental profession is asked to increase its efficiency in fighting oral disease. The means to this end are: Improve working quality in every sector and with many small improvements over the minimal effort. Furthermore the service practice, which means an office which offers thorough prophylaxis, teaches oral hygiene to the patients. This is the other efficient means to reduce disease at its root.

The integration of technical services into dental restorative procedures

A protocol for improved dentist-laboratory relations is presented. The mutual responsibilities and obligations of dentist and technician are outlined. Each step of the procedure is developed and projected at the level of case planning and diagnostic wax-up.

[Geometric-mathematical study on the occlusal interference in calotte articulation]

Calculations of occlusal interferences in calotte articulation are reported. It is shown that magnitudes of error due to the different radii of the given calotte and mounting template utp to +/- 20 mm amount to 0.1 mm at most. On the other hand the occlusal errors due to different angles of incidence of the mounting template may attain a magnitude which prevents incorporation of total prostheses.