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Orthodontic Bone Anchors

Orthodontic Bone Anchors. Parameters for Success. 1. OBA history – MK I MK II. 2. Delayed versus immediate loading. 3. Common indications. 4. Conclusion. + tube. 1999. 2002. 2000. 2001. + bracket. 2000. 2001. 2002. - slot.

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Orthodontic Bone Anchors

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  1. Orthodontic Bone Anchors Parametersfor Success

  2. 1. OBA history – MK I MK II 2. Delayed versus immediate loading 3. Common indications 4. Conclusion

  3. + tube 1999 2002 2000 2001

  4. + bracket 2000 2001 2002

  5. - slot

  6. Publications on MK I Mommaerts M, Correia P, Nuttens S. Experiencia clinica com o “Ortho Bone Anchor – OBA” – Relatorio Preliminar Rev Port Estomat Med Dent Cir Maxilofac 42: 131-135, 2001 Mommaerts MY, Michiels ML, De Pauw GA. A 2-year outcome audit of a versatile orthodontic bone anchor. J Orthod. 32: 175-81, 2005

  7. Results of MK I study • Placement between 2000 & 2002 • Follow-up till 2004 • 18 patients • 35 OBA’s 8,6% premature loss

  8. Conclusions of MK I study Bayonet shaping of neck Diminishing height of coronal screw head Subtitle Texturising of fixation part Protection by fixed appliances

  9. 1. OBA history 2. Delayed versus immediate loading with MK II 3. Parameters for success 4. Conclusion

  10. Location Mandible: 31 4 Maxilla: 13 11 Removed OBAs 2002-2005 Distal to 2,3,4 Distal to 5,6,7 Piriform aperture Zygomatic crest

  11. Delayed versus immediate loading Removed OBAs Always 5mm coronally Years in situ # Premature loss Mobile screws upon removal Immediate mandible 23 15 1 2 mob+infl 1 lost mob 5mm (30): 5 7mm (13): 4 Delayed mandible 30 20 0 5mm (46): 7 7mm (8): 0 Always coronal Immediate maxilla 7 5 0 0 Delayed maxilla 35 19 0 3 mob+infl 5mm (11): 1 7mm (4): 0 No inflam response

  12. 1. OBA history 2. Delayed versus immediate loading 3. Common indications 4. Conclusion

  13. Indications (all OBAs in situ > 3 m)

  14. most common indication

  15. 2 anchors for closing diastemas in 4 q!

  16. 1. OBA history 2. Delayed versus immediate loading 3. Indications 4. Conclusion MK II study

  17. Coronal 5mm screws are vulnerable 2 important No big difference between immediate & delayed loading in mandible

  18. Simple hook = workhorse March 2003 October 2005

  19. Brackets in special cases

  20. Better pull than push!

  21. Do not remove a mobile OBA too quickly! April 2002 October 2003

  22. Incision not necessarily in fixed gums!

  23. Thank you!

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