[Long-time follow-up studies of Isosit composite for conical veneer crowns]. / Nachuntersuchungen zur Langzeitbewährung des Komposites Isosit bei Konusverblendkronen.

The long-term resistance of veneers in conical-crowns is a predominant fact of ästhetics in using this system of anchorage. 158 concical-crowns, veneered by composite ISOSIT were tested and measured after wearing 3 and 12 years. The results are: repeadings 3.2%, insufficient colour 8.9%, borderlinespace 12.1%, visible skeleton 7.6% and gross damages only 3.2%. This results may confirm the hitherto existing clinically experience in veneering conical-crowns by composites ISOSIT.

[Dorsal border of denture base after SR-Ivocap polymerization]. / Dorsale Randspaltbildung an Gaumenplatten nach Polymerisation im SR-Ivocap-Verfahren.

The amount of dorsal borderspace of upper-plates after polymerisating in different dental laboratories has been measured and compared by statistically methods. This result showed a conspicuously small deviation. The overall average was to be found in the range of only 227 microns +/- 10.5 microns after water-laging for 4 weeks. This amount is conformable to the results of Marx. There is no interpretation of the high values measured by Peroz recently. This present results confirm on the contrary the clinically verification of the SR-Ivocap-polymerisating equipment.

[Accuracy of fit of the denture base depending on various jaw geometries. Biotechnical analysis]. / Passgenauigkeit der Prothesenbasis in Abhängigkeit unterschiedlicher Kieferkammformen. Eine biotechnische Analyse.

Good function of full dentures is closely related to an accurate fit of the denture bases. The shape of these bases depend again on the polymerization technique applied. Methods of biotechnical analysis were employed to determine the effects of the alveolar ridge, defined as an angle with the vertical plane, on the accuracy of fit. Both the expansion of castings and the curing contraction of acrylics were taken into consideration in this analysis. The relationships between an increase or reduction of the full denture base and the mechanism of adhesion to the denture-bearing area were computed and their practical implications are discussed.

[Primary accuracy limits of Isosit 10 composite after laboratory preparation]. / Die primäre Genauigkeitsgrenze von Isosit 10 Komposit nach labortechnischer Herstellung.

A modern technique of restoring the anatomical shape of teeth by composite-onlays (Isosit-IO) has been investigated by electronic equipments and the results has been described. The border crevice produced by shrinkage due to polymerisation was found to be extremely small. Significant differences were found in the occlusal and vertical plane with 30 microns as average measuring value. Consequently the high clinically importance of this technique results of the material quality.

[Breaking susceptibility of Ultralite-foil crowns for molars]. / Bruchsicherheit der Ultralite-Folienkrone für Kauflächenzähne.

Proceeding on the assumption that the use of massive cast gold constructions is an important factor in the question of economical dentistry a new technique of crownwork construction is presented. Ultralight construction is a method used in engineering for the production of load-bearing elements from embossed metal foils. Based on the new Ultralite-foil-crown the mechanical strength of the Ultralite-molar-crown is tested. Following the principles in construction with this new technique the results of breaking load tests of the ceramometallic Ultralite-molar-crown are discussed.