Abstract: According to the invention, there is provided an elongated liquid-cooled dental bur having a long direction, a proximal part adapted to be inserted into a drive device connected with a source of cooling fluid, a distal part having a cutting tip, a first channel in the proximal part fluidly communicating with the source of cooling fluid and at least one orifice extending from the first channel directed at the cutting tip for directing a spray of cooling liquid at the cutting tip, and further including a collar radially extending from the proximal part having a circumference, wherein the orifice is disposed in the collar proximal to the circumference, and wherein the collar has an end surface disposed transversely to the long direction facing the distal part, and the orifice is disposed in the end surface. The distal part is preferably removably secured to the collar, for removal and replacement of worn cutting tips.

Abstract: A penile prosthesis employing an improved pump and valve system. The main body of the prosthesis has at least one inflatable polymer cylinder suitable for implantation within the corpus cavernosum of the male patient. The penis of the patient is rendered erect by pumping a sterile fluid into the inflatable polymer cylinder(s) under adequate pressure.The sterile fluid is supplied from a reservoir and pump implanted within the scrotum of the patient which are linked to the inflatable polymer cylinder(s) by flexible tubing. The reservoir is a relatively low pressure flexible polymer bag of relatively large volume. Coupled to the reservoir by a valved diaphragm is a pump having only much less flexible walls and a relatively small volume.Manual squeezing of the reservoir forces sterile fluid through the valved diaphragm into the pump chamber.