Abstract: An interdental twisted wire brush having roughened, tapered and rounded bristle ends prepared by rotating the interdental brush both transversely to the axis of the brush and axially along its longitudinal axis, while flexing the bristles and grinding the bristle ends of the interdental brush against a flat, moving abrasive surface.

Abstract: An interdental toothbrush handle for holding a twisted wire brush includes a handle with a locking retainer connected thereto by a living hinge. The handle has two opposing side walls which extend perpendicularly from the handle and are adjacent to the living hinge. At least one of the walls includes a V-shaped gap for receiving the stem of a twisted wire brush. The handle also preferably has an indentation between the two opposing side walls and the locking retainer preferably includes a protrusion in communication with the indentation. A nub on the protrusion prevents the locking retainer from opening more than about 30.degree. to 40.degree.. The stem of a twisted wire brush is inserted into the V-shaped gap when the locking retainer is open. As the locking retainer is closed, the stem of the twisted wire brush is captured between the handle and locking retainer.

Abstract: An interdental toothbrush has a hinged locking retainer on the end of an elongated handle for capturing the stem of a twisted wire brush. The locking retainer has a hole which is adapted to receive the stem of a twisted wire brush. A land is formed in the handle adjacent the groove so that the wire brush stem is captured between that land area and a land area on the retainer. A latch on the locking retainer has a top end with a double cam surface thereon. One of the cam surfaces guides the latch into a locking position as the retainer is closed. The other of the cam surfaces releases the locking retainer when pushed.

Abstract: An interdental toothbrush has a hinged locking retainer on the end of an elongated handle. The locking retainer has a hole which is positioned relative to a groove in the handle so that a twisted wire brush may be locked into place simply by inserting it and closing the retainer. A latch on the locking retainer has a top end with a double cam surface thereon. One of the cam surfaces guides the latch into a locking position as the retainer is closed. The other of the cam surfaces releases the locking retainer when pushed.