Comparison of Corticotomy and Micro-Osteoperforation During Canine Retraction

University of Puerto Rico (UPR)

Status: Completed

Conditions: Malocclusion, Class I/II

Treatments: Procedure: Corticotomy; Procedure: Micro-Osteoperforations

Study type: Interventional

Funder types: Other

Identifiers

NCT04999150

UPR MSC IRB B0710118

Details and patient eligibility

About

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.

Full 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

Enrollment: 13 patients

Sex: All

Ages: 12 to 45 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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13 participants in 2 patient groups

Corticotomy

Active Comparator group

Description:

1. A full-thickness labial mucoperiosteal flap was reflected. 2. 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. 3. Cortical-cancellous bone grafts (0.5cc; PuraGraft, Kingwood, TX) were placed at the corticotomy sites. 4. The mini-screws were placed. 5. A nickel-titanium (NiTi) closed-coil spring was placed and secured with a 0.014"SS ligature wire at the canine and mini-screw. A Dontrix gauge (Orthopli Corp., Philadelphia, PA) was used to measure the force (150g).

Treatment:

Procedure: Corticotomy

Micro-Osteoperforation

Experimental group

Description:

1. 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). 2. 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. 3. The mini-screws were placed. 4. A NiTi closed-coil spring was placed and secured with a 0.014"SS ligature wire at the canine and mini-screw. A Dontrix gauge was used to measure the force (150g).

Treatment:

Procedure: Micro-Osteoperforations