Abstract

A new parallelometer and a technique for its use have been described. This precision instrument is rigid, and has proved to be very accurate. No play in the instrument is allowed, and parts that wear out are easily replaced. It is used when preparing teeth for pinledges, inlays; for making grooves and ☐es for 3/4 crowns; and to check the alignment of multiple preparations. The instrument requires the use of special drills and stones. Paramax-drills are used for making the postholes, slightly conical fissure-burs, and diamond stones with the Paramax grib, and when preparing teeth for three-quarter crowns and full veneer crowns.

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