Derrick Setchell | PubMed Health

PubMed2005

Brightness (value) sequence for the Vita Lumin Classic shade guide reassessed.

The purpose of this study was to locate the 16 shade tabs from the Vita Lumin 'Classic' shade guide within the quantitative Luminosity, R, G and B scales (0-255 scales) using Photoshop software. A new value order arranged according to the Photoshop scale demonstrated a more linear relationship between the 16 shade tabs than the order given by the manufacturer. A Brightness Index representing the percentage difference in value between pairs of reordered shade tabs is suggested as a more realistic determinant of change in shade tab value.

Image Processing, Computer-Assisted↗

PubMedDate not supplied

Developing a tooth restorability index.

UNLABELLED: It is generally agreed that the inherent strength of a tooth is dependent on the remaining dentine. It therefore seems logical that preservation of coronal dentine is important to the survival of intra- and extra-coronal restorations. The clinical assessment of the amount of dentine needed for functional requirements and the strategic value of remaining tooth structure is currently based on clinical opinion. This paper discusses what recommendations have been published and proposes an index that may be useful in assessing the restorability of a tooth. CLINICAL RELEVANCE: An index used to assess the amount and contribution of remaining coronal dentine to resistance and retention form could be of value in treatment planning.

Dental Prosthesis Retention↗