Use of a scanning laser three-dimensional digitizer to evaluate dimensional accuracy of dental impression materials.
A steel die was machined to represent a dental arch with teeth prepared for complete crowns. Impressions and casts were made from the die, and critical dimensions were measured by two methods--one using micrometers and the other a scanning laser three-dimensional (3-D) digitizer. The digitizer recorded measurements were more precise than the micrometer's and virtually eliminated operator error because the acquisition of data was automatic. The digitizer could also be useful for high-precision analyses of the dimensional accuracy of dental impression materials, but the cost and complexity of the instrument makes it less desirable for low-precision work.
Quick
D C
DC
Department of Diagnostic and Surgical Sciences, University of Minnesota School of Dentistry, Minneapolis.
Holtan
J R
JR
Ross
G K
GK
D002138:Calibration; D003735:Dental Casting Technique; D003760:Dental Impression Materials / Q000737:chemistry*; D003761:Dental Impression Technique; D007834:Lasers; D008854:Microscopy, Electron; D003765:Models, Dental; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013193:Stainless Steel; D013499:Surface Properties; D014463:Ultrasonography
D003760:Dental Impression Materials; D013193:Stainless Steel