摘要:

The study was designed to survey the curricular requirements, types of clinical experience, and materials/techniques used in teaching programs for all-ceramic restorations in Scandinavian dental schools. All 13 dental schools responded. Ten offered some clinical experience to pre-doctoral students, but only one required one all-ceramic restoration. The departments of fixed prosthodontics had the main teaching responsibility. All-ceramic crowns were taught at 9, veneers at 7, and inlays/onlays at 10 dental schools. A wide range of different teaching concepts, materials, and views on indications and contraindications was reported. It appears as if all-ceramic restorations are regarded as experimental by the teaching institutions, although the dental industry and some practitioners strongly recommend these types of restorations.

ISSN:0001-6357    

DOI:10.3109/00016359609003524

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

A method was established for demonstrating charge generation on the surfaces of dental materials by means of mechanical loading with different forces. With this experimental set-up charges could be extracted both from the surfaces that were mechanically loaded and from the surfaces perpendicular to the applied force. When specimens of certain ceramics were subjected to mechanical loading and the charges extracted were related to the applied force, charges of up to 3˙10-3pC/N were recorded from the surfaces perpendicular to the applied force and charges of up to 8˙10-3pC/N from the surfaces that were mechanically loaded. The results from this study indicate support for the hypothesis that the extracted charges were created by direct piezoelectricity. However, further studies are necessary for decisive proof that true piezoelectricity occurs in these materials.

ISSN:0001-6357    

DOI:10.3109/00016359609003525

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor