logo orthodontic bone anchors parameters for success

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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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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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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!