Evaluation of Two Approaches of Micro-osteoperforations (MOPs) During Orthodontic Canine Retraction
Condition: Bimaxillary Protrusion; Angle Class II, Division 1; Dental Malocclusions
MeSH terms: Malocclusion; Malocclusion, Angle Class II; Overbite
Study type: Interventional

Summary: 
      The aim of this clinical prospective study will be directed to evaluate two approaches of
      micro-osteoperforations (MOPs) during orthodontic canine retraction.
    

Detailed description: 
      The aim of the present clinical study was directed to evaluate the effectiveness of two
      approaches of micro-osteoperforations (MOPs) during orthodontic canine retraction.

      This study was conducted on a total sample of 36 canines of 18 patients, 15-22 years old who
      required therapeutic extraction of maxillary 1st premolars and canine retraction. They were
      selected randomly from the Outpatient Clinic, Department of Orthodontics, Faculty of Dental
      Medicine (Boys), Al-Azhar University, Cairo, Egypt.

      they were randamly dived into two groups:as follows: Group I: include 9 patients , MOPs were
      performed for one time only on one side before retraction.

      Group II: include 9 patients , MOPs were performed on repeated basis on one side.

      Both maxillary canines, in each patient, were randomly assigned to either an experimental
      side or the control side in a simple split-mouth design. In the experimental side,
      micro-osteoperforations was performed distal to the maxillary canine at equal distance
      between maxillary canine and 2nd premolar before starting retraction, while the canines in
      the contralateral control side were retracted without micro-osteoperforations.

      Extraction was done at the start of the treatment, and before fitting of the orthodontic
      appliance. Then upper dental arches were leveled and aligned using conventional sequences of
      wires.

      Three flapless micro-osteoperforations was performed by using orthodontic miniscrews distal
      to the maxillary canines in the experimental side before starting retraction. Each
      perforation was 1.6 mm in diameter and 3-4 mm depth into the bone. Canines were completely
      retracted on 0.016 × 0.022 ̋ stainless steel wires by using closed coil spring delivered 150
      gm force.

      Patients were followed up every 28 days for 4 months of canine retraction. Routine
      orthodontic records were obtained for each patient before treatment.

      Additionally, a full skull CBCT images were taken before treatment and immediately after
      canine retraction.

      The rate of canine retraction was assessed clinically; in addition, cone beam CT (CBCT) scans
      were used to assess the amount of canine retraction root length changes. Also anchorage loss
      of first permanent molars were assessed.

      The treatment results were compared clinically and radiographically (CBCT).
    

Intervention name(s): micro-osteoperforations
Intervention type(s): Procedure
Intervention description(s): three flapless micro-osteoperforations was performed distal to the maxillary canine before starting retraction.
Other intervention name(s): MOPs
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: None (Open Label)
Primary purpose: Other
Keywords: Micro-osteoperforation; Accelerated orthodontics; Tooth movement; Canine retraction