Abstract: A hand-held dental instrument for intraoral abrading of teeth includes a light-weight body made from a high temperature material and having internal bores or passageways for permitting fluid flow through the body. A rotatable nozzle assembly having internal fluid conduits therein is coupled to a distal end of the body such that a chamber is formed between the nozzle and the body. The chamber maintains fluid communication between an internal bore which is radially offset from a central axis bore of the body and an internal conduit of the nozzle assembly such that the nozzle can be rotated a full 360 degrees with respect to the body. The nozzle assembly includes a primary discharge port for directing flow of the air/abrasive material mixture and a secondary discharge port for directing a stream of liquid to a surface to be abraded.

Abstract: A hand-held dental instrument for intraoral abrading of teeth includes a light-weight body made from a high temperature material and having internal bores or passageways for permitting fluid flow through the body. A rotatable nozzle assembly having internal fluid conduits therein is coupled to a distal end of the body such that a chamber is formed between the nozzle and the body. The chamber maintains fluid communication between an internal bore which is radially offset from a central axis bore of the body and an internal conduit of the nozzle assembly such that the nozzle can be rotated a full 360 degrees with respect to the body. The nozzle assembly includes a primary discharge port for directing flow of the air/abrasive material mixture and a secondary discharge port for directing a stream of liquid to a surface to be abraded.