Abstract: A vibrator for generating vibrations in a bone conducting hearing device, i.e. a hearing device of the type in which the sound information is mechanically transmitted via the skull bone directly to the inner ear of a person. The vibratory movements are provided by a piezo-electric or magneto-elastic element arranged to transfer the vibrations via the skull bone from the area behind the outer ear to the inner ear. The piezo-electric or magneto-elastic element is arranged to be at least partially implanted in a surgically drilled hole directly into the mastoid bone behind the outer ear so that the vibrations are transferred directly from the element to the bone and transferred in the skull bone to the inner ear. The element is encapsulated with a bone integrating material, such as titanium or various biocompatible ceramic materials or coatings and is disc shaped and acts with a radial expansion upon electrical stimulation so that longitudinal sound waves are induced into the skull bone.

Abstract: A coupling apparatus for a bone anchored hearing device for anchoring hearing aid devices or extra-oral prostheses in the form of ear and orbital prostheses in the skull bone. The apparatus comprises a screw-shaped anchoring fixture configured to be inserted into the skull bone and a skin-penetrating abutment coupled to the fixture by a screw connection. The fixture comprises a main body with an external screw thread and a flange having a substantially planar bottom surface. The flange is configured to stop the anchoring element from penetrating through the skull bone. The skin-penetrating abutment comprises a substantially conical outer surface. The upper end surface of the fixture is designed with an open cavity with a tapered inner contour forming a seat for the bottom part of the abutment. The bottom part of the abutment is configured to create a good connecting fit between the fixture and abutment.

Abstract: A screw-shaped anchoring fixture for anchoring a prosthesis in the skull bone. The anchoring fixture comprises a main body configured to be implanted into the bone and a flange configured to function as a stop to prevent the main body from completely penetrating through the bone. The main body comprises a distal tapered apical portion, a first portion, and a second portion. The inner diameter of the second portion is greater than the inner diameter of the first portion. The method for inserting the anchoring fixture includes providing the anchoring fixture, drilling a hole, and inserting the anchoring fixture into the hole until the flange contacts the skull bone, wherein the hole has a diameter that is greater than the inner diameter of the first portion and less than the outer diameter of the second portion.