Bone enhancement device and method
There is provided in accordance with an exemplary embodiment of the invention a method of osteointegration of an implant into surrounding jaw-bone, the method comprising: applying a magnetic field around an implant, the magnetic field produced around the implant to a jaw-bone depth of up to at least about 7 mm, the magnetic field having a magnetic flux density of about 0.05-0.5 mT at up to at least about 2 mm from a surface of the implant, the magnetic field produced by a coil within the implant. A device adapted for insertion into a jawbone implant and for producing the magnetic field for bone enhancement of surrounding jawbone is also described.
1. An energy saving circuit configured for electro-magnetic orthopedic therapy, said circuit comprising:
a coil arranged to produce an orthopedic therapeutic electro-magnetic field;
a capacitor in series with said coil;
one or more switches in series with said capacitor; and
a controller to:
control said switches to maintain said capacitor at a first voltage value during a non-pulse phase, wherein no electro-magnetic field is produced,
control said switches to charge said capacitor to a second voltage value, said second voltage value equal to said first voltage value, said second voltage value having a charge opposite to said first voltage value; and
control said switches to further charge said capacitor from said second voltage value back to said first voltage value, said further charging occurring over a time period of a pulse phase, wherein said charging and said further charging said capacitor comprises passing a current through said coil to produce said electro-magnetic field, said current related to a voltage drop across said coil of about two times said first voltage value.
2. A circuit as in claim 1 , wherein said capacitor is configured to store sufficient charge to pass a current through said coil to produce said electro-magnetic field.
3. A circuit as in claim 1 , wherein said controller is configured to control said switches to disconnect said capacitor and said coil from a power source during said non-pulse stage.
4. A circuit as in claim 3 , wherein said controller is configured to control said switches to connect said capacitor and said coil to a power source in a first polarity during said charging.
5. A circuit as in claim 4 , wherein said controller is configured to control said switches to connect said capacitor and said coil to a power source in a second polarity opposite said first polarity during said further charging.
6. A circuit as in claim 1 , wherein a ratio between a timing of said voltages for said maintaining and said charging ranges from about 1:750 to about 1:5000.
7. A circuit as in claim 1 , wherein said coil is arranged to produce a bone enhancing field.
8. A circuit as in claim 1 , wherein said charging to said second voltage value occurs within a range of about 12 microseconds to 70 microseconds.
9. A circuit as in claim 1 , wherein said charging back to said first voltage value occurs within a range of about 12 microseconds to 70 microseconds.
10. A circuit as in claim 1 , wherein said energy saving circuit uses a voltage source ranging between 1.2 to 3 Volts.
11. A circuit as in claim 1 , wherein said current to produce said electro-magnetic field reaches a peak to peak amplitude of between 50 to 150 mA.
12. A circuit as in claim 1 , wherein a peak current is reached during one voltage swing.
13. A circuit as in claim 1 , wherein a wait period between said charging to the second voltage value and said charging back to said first voltage value is 750-5000 times the time taken for said charging to the second voltage value.
14. A circuit as in claim 1 , wherein current flow through said coil is preserved in a form of charge on said capacitor used for a next transmission.
15. A circuit as in claim 1 , wherein a current consumption in between pulses is negligible to a current consumption during a pulse period.
16. A circuit as in claim 1 , wherein said first voltage value is less than 4.1 Volts.
17. A circuit as in claim 1 , wherein said orthopedic therapeutic electro-magnetic field is configured for enhancing a jaw bone.
18. A circuit as in claim 1 , wherein said one or more switches are each a MOSFET transistor.
19. A bone enhancement device including the circuit of claim 1 , said device configured for insertion into at least one of a dental implant, an orthopedic implant, and directly into a bone.
20. A bone implant including the circuit of claim 1 , said implant having an external diameter in the range of 3-7 mm.
21. A bone implant including the circuit of claim 1 , said implant having a height in the range of 3-8 mm.
22. A method for producing an electro-magnetic orthopedic therapy field comprising:
providing a coil arranged to produce an orthopedic therapeutic electro-magnetic field and a capacitor in series with said coil, said capacitor configured to store sufficient charge to pass a current through said coil to produce said electro-magnetic field;
maintaining said capacitor at a first voltage value during a non-pulse phase, wherein no electro-magnetic field is produced,
charging said capacitor to a second voltage value, said second voltage value having a charge opposite to said first voltage value; and
further charging said capacitor from said second voltage value back to said first voltage value, said further charging occurring over a time period of a pulse phase, wherein said charging and said further charging said capacitor comprises passing a current through said coil to produce said electro-magnetic field.
23. The method of claim 22 , wherein said current is related to a voltage drop across said coil of about two times said first voltage value.
24. The method of claim 22 , wherein said charging to said second voltage value occurs within a range of about 12 microseconds to 70 microseconds.