title: Accelerated measurement of perikymata by an optical instrument.
abstract: The proposed device considerably reduces the measuring time of important microscopic features of tooth crown surfaces. The instrumentation is accompanied by a computer program to analyse the results. Tooth enamel is formed by ameloblasts, which demonstrate daily secretory rhythms developing tissue-specific structures known as cross striations, and longer period markings that are referred as striae of Retzius. These striae correspond to linear structures on the enamel surface. This newly developed optical measuring instrument can automatically, precisely and accurately record the number and periodicity of perikymata on the dental crown. Furthermore it can characterize the variability in periodicity of perikymata in hominids. The depth of field can be extended as desired by taking several images with different focus positions and combining them into a single composite image that contains all regions fully focused.
authors.affiliation: Nanomedicine Lab, Imagery and Therapeutics, EA 4662 Université de Franche-Comté, 25030 Besançon cedex, France ; CHU Jean Minjoz, 3 Boulevard Alexandre Fleming, 25030 Besançon cedex, France.
authors.forename: Imen
authors.initials: I
authors.lastname: Elhechmi
authors.forename: José
authors.initials: J
authors.lastname: Braga
authors.forename: Gautam
authors.initials: G
authors.lastname: Dasgupta
authors.forename: Tijani
authors.initials: T
authors.lastname: Gharbi
keywords: (120.2830) Height measurements; (120.4820) Optical systems; (120.6660) Surface measurements, roughness; (170.0110) Imaging systems; (170.0170) Medical optics and biotechnology; (170.1850) Dentistry; (170.3890) Medical optics instrumentation; (170.5810) Scanning microscopy; (240.5770) Roughness