SMD combined the technology of robotic drills with the familiarity of standard handheld medical drills to create the revolutionary SMARTdrill®. The SMARTdrill® is a handheld robotic drilling device designed to help surgeons eliminate plunge, improve accuracy in depth measurement and to determine bone density intra-operatively, while drilling bone.
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SMARTdrill® Technology measures bone density and drill bit depth in real time and reduces plunge to less than 0.5 mm.
The SMARTdrill® continuously senses drilling torque and displays this information on a graphical user interface (“GUI”). Surgeons literally have a visual picture of bone density while drilling. Total drilling energy (“DE”) is also displayed. Importantly, DE correlates with implant pullout strength (“POS”).
Drilling Energy ("DE") correlates strongly with screw pullout strength ("POS")
In the examples above, the SMARTdrill® displays the drilling energy in the Energy Output Box (top right, J = Joules). For the first example, the total drilling energy was 2.1 J. In this small fragment system 2.1 J correlates with a pullout strength of about 200 Newtons for the small fragment screw secured into that hole.
The next example shows the consistency of the measurement when repeated 3 times in the same SawbonesTM block. The total energy for 3 drill holes is 6.6 J or about 2.2 J per drilling event.
Since SMARTdrill® measures Drilling Energy the surgeon will know how much energy is stored in each screw. Therefore, the surgeon will know when enough screws are placed (from empirical data stored in SMD’s Global Bone Database) to achieve the construct strength that is optimal for healing.
For those who want to achieve balanced fixation, they can simply compare the energy stored on each side of the fracture. Finally, the surgeon will be able to rest assured that adequate implant purchase and construct strength have been obtained.
In the confirmation x-ray above we see the penetration of a 3.2 mm drill bit through the proximal ulna that stopped in the distal cortex, just before it penetrated into the proximal radioulnar joint space. The surgeon simply used the graphical user interface (“GUI”) on the SMARTdrill® to determine when to stop, thus avoiding both joint space penetration and damage to the intra-articular cartilage. Importantly, the surgeon also avoided the radiation exposure associated with use of fluoroscopy.
The SMARTdrill® technology transfers seamlessly to real bone and tissue. In this porcine model the SMARTdrill® recognizes all four of the cortices and the distances between them. In addition, on inspection of the fourth curve, the surgeon can see that the drill bit encountered the proximal surface of the fourth cortex at about a 45o.
If this were a reverse shoulder replacement, the surgeon would have recognized the second cortex before drill bit penetration occurred and would have redirected to stay within the glenoid bone. Often 3-5 screws are placed in this manner, through the face of the glenoid (socket). The surgeon can only see the face of the glenoid, the rest of the boney anatomy is covered in soft tissue, so having the SMARTdrill® to ensure optimal placement of multiple screws is invaluable.
Our innovative handheld robotic drill device features a proprietary gearbox, motor and sensor technology working together to deliver a first in orthopaedic medicine.
• Allows safe depth control
• Provides real time drill bit depth measurement
• Provides real time bone density measurement (and therefore POS)
• Provides drill bit performance data