Abstract
The Effect of Insertion Angle on Primary Stability of Orthodontic Mini-implants "An Experimental in vivo Study"
Highlights
The aims of the present study were to determine whether obliquely inserted mini-implants can be loaded immediately with light orthodontic force? And which mini-implants are more stable those with 90 degree or 60 degree insertion angles?
MATERIALS AND METHODS The experimental mean used in this study was 16 mini-implants (AbsoAnchor System, Dentos, Inc., Daegu, Korea) (1.3mm diameter, 5mm length) implanted in the tibia bone of 3 rabbits
First group implanted in the rabbit’s tibia bone at 90 degree angle to the bone surface, the second group implanted at 60 degree angle to the bone surface
Summary
Before any orthodontic tooth movement is initiated, a precise analysis of the patient’s anchorage situation must take place.(1) Orthodontic mini-implants have been proven to facilitate temporary stationary anchorage.(2,3) Mini screws need to achieve adequate primary stability immediately after their insertion, so that they can be healed properly and be loaded immediately.(4) The quality of bone, implant design and the insertion technique are the essential factors influencing primary stability.(5)The most frequently used insertion site is the alveolar ridge.tooth injury represents a risk and should not underestimated.(6-8) To avoid root damage, Park et al,(9) introduce an oblique instead of a perpendicular miniimplant insertion because more space was available near the apical region.So, the aims of the present study were to determine whether obliquely inserted mini-implants can be loaded immediately with light orthodontic force? And which mini-implants are more stable those with 90 degree or 60 degree insertion angles?. Before any orthodontic tooth movement is initiated, a precise analysis of the patient’s anchorage situation must take place.(1) Orthodontic mini-implants have been proven to facilitate temporary stationary anchorage.(2,3) Mini screws need to achieve adequate primary stability immediately after their insertion, so that they can be healed properly and be loaded immediately.(4) The quality of bone, implant design and the insertion technique are the essential factors influencing primary stability.(5)The most frequently used insertion site is the alveolar ridge. Tooth injury represents a risk and should not underestimated.(6-8) To avoid root damage, Park et al,(9) introduce an oblique instead of a perpendicular miniimplant insertion because more space was available near the apical region. The aims of the present study were to determine whether obliquely inserted mini-implants can be loaded immediately with light orthodontic force? Which mini-implants are more stable those with 90 degree or 60 degree insertion angles?
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