Shielded dental safety needle

摘要

A needle cannula apparatus is provided which includes a needle hub that is mountable to an instrument and has a cantilevered portion extending therefrom. The cantilevered portion has a button member and a hub stop disposed at a distal end thereof. The needle hub defines at least one tab slot having a tab slot end. A shield is movably disposed about the needle hub and defines a shield slot configured for relative slidable movement of the button member therein. The shield slot includes a proximal enlarged slot section configured to engage the hub stop such that proximal movement of the shield is prevented. The shield further includes at least one tab stop that is configured for movement within the at least one tab slot of the needle hub and engagement with the tab slot end such that distal movement of the shield is prevented. The needle cannula hub may include at least one hub slot and the shield includes at least one shield rail. The at least one shield rail sidably engages the at least one hub slot facilitating axial movement of the shield relative to the needle hub. The shield slot may further define a transport enlarged slot section disposed between a distal portion of the shield slot and the proximal enlarged slot section. A method for transport and use of the needle cannula apparatus is disclosed.