The present invention relates to an implantable bone distraction device (1) for distracting osteotomically separated bone sections (2, 2'), said implantable distraction device (1) comprising a first block (3), a second block (3'), and an actuator (4) including means for adjusting the space between the two blocks, enabling distraction between the first bone section (2) and the second bone section (2'). The implantable bone distraction device (1) further comprises at least one vibration sensor (6) arranged in an area located between the first block (3) and the second block (3') and oriented in order to measure a vibration response of a medium comprising the implantable bone distraction device (1).
