Implant for monitoring osseointegration after implantation

1 . An implant comprising

a non-metallic structural part made of a fibre reinforced composite, having isoelastic properties with bone,

a reference stress level sensor arranged in connection with the structural part,

a first osseointegration level sensor arranged on a surface of the structural part, and capable of becoming attached to the bone during osseointegration of the implant, which second osseointegration level sensor is a stress level sensor; and

a second osseointegration level sensor capable of becoming attached to the bone during osseointegration of the implant, wherein the first osseointegration level sensor and/or second osseointegration level sensor are capable of bioactive attachment to the bone during osseointegration of the implant; and, optionally, wherein the second osseointegration level sensor is diametrically opposed to the first osseointegration level sensor.

2 . The implant according to claim 1 , wherein the second osseointegration sensor is a stress level sensor.

3 . The implant according to claim 1 , wherein each of the reference sensor, the first osseointegration level sensor and the second osseointegration level sensor are selected from a group consisting of stress gauge, microelectromechanical sensor, piezoresistive sensor and passive resonator based sensor.

4 . The implant according to claim 1 , wherein the implant further comprises a biochemical sensor arranged on the surface of the structural part.

5 . The implant according to claim 4 , wherein the biochemical sensor is a pH sensor.

6 . The implant according to claim 1 , wherein the implant is a fracture fixation plate, a femoral stem of a hip prosthesis, a hip prosthesis, a knee prosthesis, an intramedullary nail, a vertebral fusion implant, plastic surgery implant, a jawbone implant, a cranial implant, a dental implant or a distractor.

7 . The implant according to claim 1 , wherein the implant is a hip prosthesis, wherein

the first structural part is femoral stem,

the reference stress level sensor is arranged inside the femoral stem, on the axis of the femoral stem,

the first osseointegration level sensor is arranged on the surface of the femoral stem, on its lateral side, and

the second osseointegration level sensor is arranged on the surface of the femoral stem, on its medial side.

8 . The implant according to claim 7 , further comprising a second structural part which is an acetubular cup.

9 . The implant according to claim 1 , wherein the implant is an intervertebral disc, wherein

the reference stress level sensor is arranged on a first surface of the structural part, the first surface being a lateral distal surface of the structural part, and

the first osseointegration level sensor is arranged on a second surface of the structural part, the second surface being arranged to face a vertebral body ( 54 ).

10 . The implant according to claim 1 , wherein the implant is a knee prosthesis, wherein

the first structural part is tibial component comprising a tibial base plate, and a tibial stem, the tibial stem defining a tibial axis,

the reference stress level sensor is arranged on the surface of the tibial stem, essentially parallel to the tibial axis,

the first osseointegration level sensor is arranged on the surface of the tibial base plate, the surface being essentially perpendicular to the tibial axis, on a lateral side, facing away from the tibial base plate, and

an optional pH sensor is arranged on the surface of the tibial base plate, the surface being at an angle different from 90° with respect to the tibial axis.

11 . The implant according to claim 10 , further comprising a second structural part which is a femoral component and a third structural part which is a spacer.

12 . An implant system comprising

an implant according to claim 1 , and

at least one processing core and memory comprising computer executable instructions,

the computer executable instructions being configured to, together with the memory and the at least one processing core, cause the implant system to process the measurement results received from the sensors.

13 . The implant system according to claim 12 , wherein at least one processing core and memory comprising computer executable instructions are comprised in a mobile device.

14 . The implant system according to claim 13 , wherein the mobile device is configured to transmit results of the processing of the measurement results to a database, and to raise an alarm in case of change in the results of analysis.