ABSTRACT

Objectives

To investigate the effect of micro-osteoperforation (MOP) on the rate of tooth movement (RTM), space closure duration, and oral health–related quality of life (OHRQoL) during completion of anterior retraction in patients undergoing combined orthodontic-surgical treatment after premolar extraction and decompensation with sliding mechanics.

Materials and Methods

Twenty-four participants with indications for premolar extractions were randomly allocated to treatment with conventional sliding mechanics (control group; CG) or with to treatment in which three MOPs were performed every activation (experimental group; EG). Dental impressions were taken monthly until space closure was completed and dental casts were converted to three-dimensional models. After the anterior retraction procedure, Oral Health Impact Profile (OHIP-14) questionnaires were filled out at 4 and 72 hours.

Results

Eighteen patients (7 men and 11 women) remained in the trial until space closure was completed (mean follow-up period = 247 days). For full space closure RTM, no significant difference (P = .492) was found between groups (0.614 mm/month for the CG; 0.672 mm/month for the EG). The RTM for different time points, groups, time frames and their interaction were statistically different (P < .05). In multiple correlation analysis, the RTM significantly decreased over time for both groups (P < .05). The OHRQoL scores were significantly higher (worse) for the EG. The psychological, physical and social disabilities, and handicap domains displayed significant differences between the two groups.

Conclusion

Use of MOPs did not change the full space closure RTM, while it had a negative impact on OHRQoL.

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Author notes

a

Researcher, Department of Orthodontics, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil.

b

Professor and Department Chair, Department of Orthodontics, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil.

c

Professor, Department of Orthodontics, School of Dentistry, Federal University of Para, Belem, Brazil.

d

Professor, Department of Orthodontics, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil.