LAUSR

Introduction Studies have demonstrated the potential efficacy of micro‐osteoperforations in accelerating tooth movement by amplifying the expression of inflammatory markers. The aim of this investigation was to examine the effects of micro‐osteoperforations on orthodontic root resorption with microcomputed tomography. Methods This prospective controlled clinical trial involved 20 subjects requiring extraction of the maxillary first premolars as part of their orthodontic treatment. A buccal tipping force of 150 g was applied to both premolars. Using the Propel appliance (Propel Orthodontics, San Jose, Calif), micro‐osteoperforations were applied at a depth of 5 mm on the mesial and distal aspects in the midroot region of the experimental side of the first premolar root; the contralateral side served as the control. After 28 days, both premolars were extracted. The teeth were scanned under microcomputed tomography, and the volumes of root resorption craters were calculated and compared. Results Premolars treated with micro‐osteoperforation exhibited significantly greater average total amounts of root resorption than did the control teeth (0.576 vs 0.406 mm3). The total average volumetric root loss of premolars treated with micro‐osteoperforation was 42% greater than that of the control teeth. Conclusions This 28‐day trial showed that micro‐osteoperforations resulted in greater orthodontic root resorption. However, these results should be verified in patients who are undergoing full‐length orthodontic treatment. HighlightsMicro‐osteoperforations were associated with an increase in root resorption after 4 weeks of orthodontic tooth movement.Future studies should be done on patients having a full course of orthodontic treatment.