Bone implant having circumferentially oriented roughness

An implant comprising a shaft, wherein the shaft is sized and configured to be embedded in bone tissue and comprises a coronal end having a coronal end portion with a maximum lateral dimension not exceeding the maximum lateral dimension of the shaft, an apical end, and an outer surface having at least two axial sections having circumferentially-oriented roughness, each of the sections comprising a series of circumferentially-oriented peaks, each peak having a crest and being axially spaced apart from adjacent peaks by troughs,

• wherein the axial spacing between the crests of adjacent peaks of a section is less than the axial spacing between the crests of adjacent peaks of any apically-located axial section,
• wherein the sections of circumferentially-oriented roughness have the same or substantially the same pitch, and
• wherein the crests of all of the peaks or substantially all of the peaks in the first and second axial sections lie on an axial plane parallel to the main axis of the shaft.

An implant comprising a shaft sized and configured to be embedded in a maxilla or mandible, wherein the shaft comprises a coronal end, an apical end, and an outer surface having a plurality of axial sections having circumferentially-oriented roughness and the sections of circumferentially-oriented roughness have the same or substantially the same pitch, each of the sections comprising a series of circumferentially-oriented peaks, each peak having a crest and being axially spaced apart from adjacent peaks by troughs,

• wherein the axial spacing between the crests of adjacent peaks of a section is less than the axial spacing between the crests of adjacent peaks of the adjacent apically-located axial section,
• wherein the crests of all of the peaks or substantially all of the peaks in at least two of said sections lie on an axial plane parallel to the main axis of the shaft, and
• wherein a bore comprising an internally-threaded section extends apically into the shaft from the coronal end.

The implant according to claim 94, wherein the pitch is a predetermined distance and the ratio of the predetermined distance to the axial spacing between the crests of adjacent peaks in the first axial section is a first multiple integer, the ratio of the predetermined distance to the axial spacing between the crests of adjacent peaks in the second axial section is a second multiple integer and the first multiple integer is greater than the second multiple integer.