PubMed · 5287735
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D W Jones. 1971. Porcelain denture teeth.. https://pubmed.ncbi.nlm.nih.gov/5287735/
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OBJECTIVE: To investigate variations in preparations for porcelain laminate veneers (PLVs) in general dental practice. DESIGN: Laboratory-based retrospective analysis of dies for PLVs. SETTING: General dental practice in England and Wales (1994). METHODS: A sample (95 cases) of laboratory models from general dental practice featuring preparations for PLVs was randomly selected from a full service commercial dental laboratory. Aspects of the preparations were quantified and compared with accepted preparation criteria distilled from a review of the literature. RESULTS: The teeth found to be most frequently prepared for PLVs were maxillary incisors (48%). The majority of cases investigated were for one veneer only (56%). The margins of the preparations were variably positioned with more than half of the preparations (55%) having no clear margin. In accordance with current guidelines the incisal edge tended to have been reduced during preparation (47%). In contrast, most teeth were underprepared with an average depth of preparation of 0.16 mm (SD 0.60 mm, 95% CI-0.1, 0.42). CONCLUSIONS: There was little evidence that established guidelines for the preparation of teeth for PLVs had been applied in full.
Posts and cores are often required for the restoration of endodontically treated teeth. Many methods for making post-and-core reconstructions have been described. With the increased use of all-ceramic systems for esthetic tooth restorations, there is a need for esthetic core reconstructions. This article describes several methods for fabricating esthetic posts and cores.