Patent ID: 8038439
Filing Date: 2011-10-18
Classification: A61C

Abstract:
1. A medical or dental handpiece, comprising: an outer sleeve; a tool receptacle for a tool that can be set in motion; at least one drive element to set the tool in motion; and a lighting device for emitting radiation onto a preparation site, wherein the lighting device comprises at least one optical semiconductor element which is arranged at least partially in the interior of the handpiece in a light emitting position in which the at least one optical semiconductor element is disposed such that it can be supplied with electric energy and can emit radiation such that the radiation can be directed toward a treatment area and which is detachably connected to the handpiece, wherein an opening is provided in the outer sleeve of the handpiece and is configured so that the at least one optical semiconductor element can be passed through this opening, wherein the opening for passing through the at least one optical semiconductor element is configured as a coupling opening of a rotary coupling, said rotary coupling being arranged at an end of the handpiece opposite to a head part of the handpiece, so that the at least one optical semiconductor element can be moved from said light emitting position through the interior of the handpiece towards said opening and through said opening to remove the at least one optical semiconductor element through said opening.