Ultrasonic dental scaler insert with ergonomic grip design

An insert for a dental, ultrasonic scaler assembly comprising:

• a working tool having a fluid passage therein;
• a magnetostrictive stack;
• a connecting body operatively connecting said tool to said magnetostrictive stack;
• a nozzle assembly having a connecting body-receiving bore therein;
• and, a grip portion covering at least a portion of said nozzle assembly
• said connecting body having a passageway therein which is in fluid communication with a tool fluid passage;
• said grip portion being of uni-body construction having an end proximal and an end distal to said tool;
• said proximal end of said grip portion being provided with a tool receiving aperture and said distal end being provided with a nozzle assembly receiving aperture, wherein said nozzle assembly comprises a retaining nozzle, a middle nozzle and a nozzle nose;
• and,
• a grip retaining ring positioned between said middle nozzle and said retaining nozzle, wherein the grip retaining ring positions the grip portion over the connecting body and prevents the grip portion from moving axially and radially;
• wherein the grip retaining ring locates the grip portion relative to the working tool, the magnetostrictive stack and connecting body;
• and
• wherein said retaining nozzle is configured to receive at least a portion of said connecting body, and to connect with said middle nozzle in a substantially fluid-tight manner.