Malocclusion, Class I/II
Conditions
Keywords
Corticotomy; MOP; Tooth movement
Brief summary
Corticotomy and micro-osteoperforation (MOP) have been proven to accelerate tooth movement and shorten orthodontic treatment time, compared to conventional treatment. MOP is less invasive; however, it is unclear whether it is as effective as a corticotomy. The purpose of this study was to compare the maxillary canine retraction achieved by these techniques.
Detailed description
Thirteen patients (5 females, 8 males; mean age, 18.07±6.74 years) with healthy permanent dentition requiring the extraction of maxillary first premolars were included in a split-mouth randomized clinical trial. Subjects with previous orthodontic or endodontic treatment of canines were excluded. At least 3 months post-extraction, MOPs, and corticotomies were performed distal to the canines. Mini-screws with closed-coil springs (150g) were used for canine retraction. Dental casts were attained at baseline (T0) and 3 months post-intervention (T1). Calibrated examiners measured the distances from the canine to the second premolar on both sides. A Signed-rank sum test was used to compare canine retraction achieved in 3 months (T0-T1) in two sides
Interventions
PROCEDUREMicro-Osteoperforations
MOPs were performed with a stainless-steel manual drill tip that had 1.6mm diameter with an adjustable depth set to 5mm (Excellerator® RT; Propel Orthodontics, Milpitas, CA). Six perforations were made along 2 parallel vertical lines (each line with 3 holes spaced \ 2mm apart) distal to the canine and perpendicular to the buccal cortical bone. The mini-screws were placed. A NiTi closed-coil spring was placed and secured with a 0.014SS ligature wire at the canine and mini-screw. A Dontrix gauge was used to measure the force (150g)
PROCEDURECorticotomy
A full-thickness labial mucoperiosteal flap was reflected. Two vertical corticotomies (1 mesial and 1 distal to the canine) were performed. The cortical bone was cut 2 to 3 mm below the alveolar crest towards the apex, until bone marrow was exposed. Cortical-cancellous bone grafts (0.5cc; PuraGraft, Kingwood, TX) were placed at the corticotomy sites. The mini-screws were placed. A nickel-titanium (NiTi) closed-coil spring was placed and secured with a 0.014SS ligature wire at the canine and mini-screw. A Dontrix gauge (Orthopli Corp., Philadelphia, PA) was used to measure the force (150g)
Sponsors
University of Zagreb
University of Puerto Rico
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)
Masking description
Each patient was randomly assigned an identification number (S1-S13) by picking a sealed envelope. The randomization of IDs to the right or left side for MOP was accomplished with a 1:1 allocation ratio, using a computer-generated research randomizer.
Intervention model description
a split-mouth randomized clinical trial.
Eligibility
Sex/Gender
ALL
Age
12 Years to 45 Years
Healthy volunteers
Yes
Inclusion criteria
* Healthy permanent dentition requiring the extraction of maxillary first premolars with less than 8mm of maxillary anterior crowding
Exclusion criteria
* Previous orthodontic or endodontic treatment of the canines
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Canine retraction | 3 months | Amount of tooth movement (in mm) attained by the maxillary canines after retracting them |
Countries
Puerto Rico
Outcome results
None listed