Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
An apparatus for studying bone formation growth in an implant in response to a locally administered test substance, the apparatus being of a bio-compatible material and being intended to be implanted in living bone tissue, characterized in that it consists of an outer portion (2) with a central recess (2a) and a removable inner portion (5) inserted in the recess, both portions together forming a bone formation through channel (9, 10) which is intended to be exposed when the inner portion (5) is removed, in order to make possible examination of tissue (24) ingrown into the channel, and said inner portion further including a reservoir (13) in communication with the bone ingrowth channel (9, 10) for the supply of the test substance.
Claim 2
Independent Claim
122 words
An apparatus for studying bone formation growth in an implant in response to a locally administered test substance, the apparatus being of a bio-compatible material and being intended to be implanted in living bone tissue, characterized in that it consists of an outer portion (2) with a central recess (2a) and a removable inner portion (5) inserted in the recess, both portions together forming a bone formation through channel (9, 10) which is intended to be exposed when the inner portion (5) is removed, in order to make possible examination of tissue (24) ingrown into the channel, and said inner portion further including a reservoir (13) in communication with the bone ingrowth channel (9, 10) for the supply of the test substance.
Claim 3
Dependent Claim
34 words
The apparatus as claimed in Claim 1, characterized in that it is manufactured of pure titanium, or at least coated with pure titanium on those surfaces which come into direct contact with bone tissue.
Claim 4
Dependent Claim
58 words
The apparatus as claimed in Claim 2, characterized in that the reservoir (13) consists of a cavity provided in the inner portion (5) and being in communication with the bone formation channel (9, 10) by the intermediary of a capillary aperture (14), so-called diffusion capillary, for the supply of the test substance under consideration without simultaneous liquid flow.
Claim 5
Dependent Claim
67 words
The apparatus as claimed in Claim 3, characterized in that the reservoir (13) consists of an elongate, diagonally disposed cavity of substantially the same orientation as the bone formation channel (9, 10) two through holes for locking screws (7, 8) for fixed interlocking of the two portions (2, 5) being disposed in the material of the inner portion (5) on either side of the elongate reservoir (13).
Claim 6
Dependent Claim
40 words
The apparatus as claimed in Claim 4, characterized in that the reservoir (13) is upwardly covered by a cover plate (15) which is locked to the upper end surface (16) of said inner portion by said locking screws (7, 8).
Claim 7
Dependent Claim
40 words
The apparatus as claimed in Claim 5, characterized in that said cover plate (15) is provided with two holes (19, 20) above said liquid reservoir (13) for hoses (21, 22) for the supply and removal (drainage), respectively of test substance.
Claim 8
Dependent Claim
35 words
The apparatus as claimed in Claim 6, characterized in that said reservoir (13) is connected to a subcutaneous, osmotically acting minipump (25) for the continuous supply of test substance during a predetermined period of time.