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PubMed · 2146831

[The loading capacity of different pin-post structural systems].

C Köhler·S Tittel
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Abstract

Compared with semi-individual or individual cast constructions, fully manufactured post-abutment systems are exposed to stronger torsional loads due to their circular cross-sections. The investigations refer to the question, to what extent different manufactured constructions in the root of a tooth will withstand torsional moments. A cold-pressured connection between titanium-post and titanium-construction was tested as to its mechanical load capacity. Moreover, the mechanical compound stability of individual cast constructions on friction-posts was investigated.

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Dental Casting TechniqueDental ImplantationDental PinsDenture DesignMaterials TestingPost and Core TechniqueTitaniumComparative StudyEnglish AbstractJournal Article

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C Köhler, S Tittel. 1990. [The loading capacity of different pin-post structural systems].. https://pubmed.ncbi.nlm.nih.gov/2146831/

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[Effects of laser welding on bond of porcelain fused cast pure titanium].

OBJECTIVE: To investigate the influence of the laser welding on bond of porcelain fused to cast pure titanium. METHODS: Twenty cast titanium plates were divided into two groups: laser welded group and control group. The low-fusing porcelain was fused to the laser welded cast pure titanium plates at fusion zone. The bond strength of the porcelain to laser welded cast pure titanium was measured by the three-point bending test. The interface of titanium and porcelain was investigated by scanning electron microscopy (SEM) and energy depressive X-ray detector (EDX). The non-welded titanium plates were used as comparison. RESULTS: No significant difference of the bond strength was found between laser-welded samples [(46.85 +/- 0.76) MPa] and the controls [(41.71 +/- 0.55) MPa] (P > 0.05). The SEM displayed the interface presented similar irregularities with a predominance. The titanium diffused to low-fusing porcelain, while silicon and aluminum diffused to titanium basement. CONCLUSIONS: Laser welding does not affect low-fusing porcelain fused to pure titanium.

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