Corticotomy-Assisted Class III Elastic Applications (CACIIIEA)

TC Erciyes University

Status: Completed

Conditions: Class III Malocclusion

Treatments: Device: Skeletal anchorage and intermaxillary elastic assisted maxillary protraction

Study type: Interventional

Funder types: Other

Identifiers

NCT06763900

TDH-2022-11536

Details and patient eligibility

About

This prospective randomized clinical study aimed to evaluate the effectiveness of corticotomy-assisted maxillary protraction with three different miniplate and intermaxillary elastic applications after corticotomy in patients with skeletal Class III malocclusion.

Full description

In acrylic splint group (AS) and palatal miniscrew group (MS), an acrylic splint containing hooks in the upper molar region was prepared and cemented. In the MS group, two miniscrews were used in the palatal region for additional anchorage. An incomplete Le Fort 1 osteotomy was performed in all patients to free the maxilla. Miniplates were placed vertically between the mandibular canine and first premolar in all groups, and horizontally under the osteotomy line in the maxillary molar region in miniplate group (MP). Class III elastics were applied 5 days after the surgery.

Enrollment: 20 patients

Sex: All

Ages: 13 to 15 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Skeletal Class III malocclusion
• ANB angle between 0 and -4°
• normal or horizontal growth pattern
• anterior crossbite or edge-to-edge incisor relationship
• permanent dentition

Exclusion criteria

• requirement for maxillary expansion
• pseudo-Class III malocclusion
• inadequate oral hygiene
• missing tooth in the upper dentition

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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20 participants in 3 patient groups

Miniplate Group (MP)

Experimental group

Description:

An incomplete Le Fort 1 osteotomy was performed in all patients to free the maxilla. Miniplates were placed vertically between the mandibular canine and first premolar in all groups, and horizontally under the osteotomy line in the maxillary molar region. Class III elastics were applied 5 days after the surgery. Treatment was continued until a positive overjet was achieved. Cephalometric radiographs were taken at the beginning of treatment (T0) and at the end of the protraction period (T1).

Treatment:

Device: Skeletal anchorage and intermaxillary elastic assisted maxillary protraction

Acrylic Splint Group (AS)

Experimental group

Description:

An acrylic splint containing hooks in the upper molar region was prepared and cemented to the upper dentition. An incomplete Le Fort 1 osteotomy was performed in all patients to free the maxilla. Miniplates were placed vertically between the mandibular canine and first premolar in all groups, and horizontally under the osteotomy line in the maxillary molar region in miniplate group (MP). Class III elastics were applied 5 days after the surgery. Treatment was continued until a positive overjet was achieved. Cephalometric radiographs were taken at the beginning of treatment (T0) and at the end of the protraction period (T1).

Treatment:

Device: Skeletal anchorage and intermaxillary elastic assisted maxillary protraction

Palatal Miniscrew Supported Acrylic Splint Group (MS)

Experimental group

Description:

An acrylic splint containing hooks in the upper molar region was prepared and cemented to the upper dentition. Two miniscrews were used in the palatal region for additional anchorage. An incomplete Le Fort 1 osteotomy was performed in all patients to free the maxilla. Miniplates were placed vertically between the mandibular canine and first premolar in all groups, and horizontally under the osteotomy line in the maxillary molar region in miniplate group (MP). Class III elastics were applied 5 days after the surgery. Treatment was continued until a positive overjet was achieved. Cephalometric radiographs were taken at the beginning of treatment (T0) and at the end of the protraction period (T1).

Treatment:

Device: Skeletal anchorage and intermaxillary elastic assisted maxillary protraction