LOGO Orthodontic Bone Anchors Parameters for Success
Dec 15, 2015
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Orthodontic Bone Anchors
Parameters for Success
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1. OBA history – MK I MK II 1. OBA history – MK I MK II
2. Delayed versus immediate loading 2. Delayed versus immediate loading
3. Common indications 3. Common indications
4. Conclusion 4. Conclusion
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2000 2001
+ tube + tube
1999 2002
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2000 20022001
+ bracket + bracket
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- slot - slot
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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
Publications on MK I Publications on MK I
Mommaerts MY, Michiels ML, De Pauw GA. A 2-year outcome audit of a versatile orthodontic bone anchor. J Orthod. 32: 175-81, 2005
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Placement between 2000 & 2002 Follow-up till 2004 18 patients 35 OBA’s
Results of MK I study
8,6% premature loss 8,6% premature loss
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SubtitleSubtitle
Conclusions of MK I study
Bayonet shaping of neck
Diminishing height of coronal screw head
Protection by fixed appliances
Texturising of fixation part
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1. OBA history 1. OBA history
2. Delayed versus immediate loading with MK II 2. Delayed versus immediate loading with MK II
3. Parameters for success 3. Parameters for success
4. Conclusion 4. Conclusion
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LOGO Location
Mandible: 31 4
Maxilla: 13 11
Removed OBAs 2002-2005 Removed OBAs 2002-2005
Distal to 2,3,4 Distal to 5,6,7
Piriform aperture Zygomatic crest
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LOGO Delayed versus immediate loading
Delayed maxilla
Immediate maxilla
Delayed mandible
5mm (11): 17mm (4): 0
03 mob+infl
1935
0057
5mm (46): 77mm (8): 0
0 2030
5mm (30): 57mm (13): 4
12 mob+infl1 lost mob
1523Immediate mandible
Mobile screws upon removalPremature loss
#Years in
situ
Removed OBAs Removed OBAs Always 5mm coronally
Always coronal
No inflam response
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1. OBA history 1. OBA history
2. Delayed versus immediate loading 2. Delayed versus immediate loading
3. Common indications 3. Common indications
4. Conclusion 4. Conclusion
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LOGO Indications (all OBAs in situ > 3 m)
35
3
4
1
11
8
4
5
3
0 10 20 30 40 50
mandible
maxilla
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most common indication most common indication
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LOGO 2 anchors for closing diastemas in 4 q!
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1. OBA history 1. OBA history
2. Delayed versus immediate loading 2. Delayed versus immediate loading
3. Indications 3. Indications
4. Conclusion MK II study 4. Conclusion MK II study
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Coronal 5mm screws are vulnerable
No big difference between immediate & delayed loading in mandible
2 important
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LOGO Simple hook = workhorse
March 2003 March 2003
October 2005 October 2005
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LOGO Brackets in special cases
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Better pull than push!
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LOGO Do not remove a mobile OBA too quickly!
April 2002 April 2002
October 2003 October 2003
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LOGO Incision not necessarily in fixed gums!
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Thank you!