Amira Aboalnaga, Mona Salah Fayed And Sanaa Abo Zeid,

ABSTRACT
Background: Among The Recent Modalities Introduced To Accelerate Orthodontic Tooth Movement (OTM) Is Micro-osteoperforations (MOPs), Literally Meaning Puncturing Of Bone. Objective: The Primary Aim Of This Split-mouth Study Was To Evaluate The Effect Of (MOPs) On The Rate Of (OTM). Methods: 18 Patients Who Required Maxillary Canine Retraction Into First Premolar Extraction Sites As Part Of Their Orthodontic Treatment Completed This Study. Leveling And Alignment Proceeded Till 0.016� � 0.022� NiTi Upper Archwire, Indirect Skeletal Anchorage Was Prepared, Then The Patients Were Referred For Upper 1st Premolars Extraction. Three Months Later, 0.017� � 0.025� Stainless-steel Upper Archwire Was Inserted And Three Vertically Aligned MOPs Were Performed Distal To The Canine Using A Single TAD Unilaterally, While The Other Side Served As Control. NiTi Closing Coil Springs Delivering 150 Gms Of Force Were Used For Canine Retraction. Data Were Collected From Monthly Upper Impressions, Which Were Used To Obtain Digital Models, In Addition To Pre- And Post-retraction Maxillary CBCT Images.

Results: The Mean Difference Of The Distance Traveled By The Canine Cusp Tip Was Greater In The MOP Group Than The Control Group By (0.06 � 0.7mm) (P > 0.05(. The Mean Differences Of The Distance Traveled By The Canine Center And Apex Were Significantly Greater In The MOP Group Than The Control Group By (0.37 � 0.63 Mm, P < 0.05( And (0.47 � 0.56 Mm, P < 0.01) Respectively.

Conclusions: Within The Limitations Of This Study, The Micro-osteoperforations Seemed To Facilitate Root Movement Yielding More Bodily Canine Retraction.