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Volume 7 , Issue 1
January/February 1994

Pages 50-55


Using a Computer Color-Matching System in Color Reproduction of Porcelain Restorations. Part 3: A Newly Developed Spectrophotometer Designed for Clinical Application

Ishikawa-Nagai/Sato/Shiraishi/Ishibashi


PMID: 8179783

This paper reports the development of a newly modified, noncontact spectrophotometer for clinical use. The instrument is capable of accurately measuring the color within small areas (1 x 2 mm) of a tooth. This spectrophotometer used a 45 degree/0 degree geometry, a 150W halogen lamp, and fiberoptics to focus the light, together with a lens having a focal point distance of 85 mm. A movable platform was added to the apparatus to automatically scan and measure the color of specific areas. Short-term repeatability indicated the color difference delta E to be approximately 0.15.


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