Class III Malocclusion
Conditions
Keywords
Class III Malocclusion, Miniplates, Corticotomy, Skeletal Anchorage, Class III Elastics
Brief summary
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.
Detailed 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.
Interventions
DEVICESkeletal anchorage and intermaxillary elastic assisted maxillary protraction
maxillary protraction with corticotomy-assisted different miniplate and intermaxillary elastic applications after growth spurt in patients with skeletal Class III malocclusion
Sponsors
TC Erciyes University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Intervention model description
Twenty patients aged between 13-15 years were randomly divided into three groups. 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. 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).
Eligibility
Sex/Gender
ALL
Age
13 Years to 15 Years
Healthy volunteers
No
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Maxillomandibular sagittal changes | Through study completion, an avarage of 6 months | Investigation of Angular changes in SNA (°), SNB (°), ANB (°) measurements. Investigation of Distance changes in Wits (mm), A-Na Perp (mm), Co-A (mm), A-VRL (mm), and B-VRL (mm) measurements. |
| Vertical changes | Through study completion, an avarage of 6 months | Investigation of Angular changes in Y-axis angle (°), SN-GoGN (°), SN-PP (°), Jarabak ratio measurements. Investigation of Distance changes in A-HRL (mm) measurement. |
| Dentoalveolar changes | Through study completion, an avarage of 6 months | Investigation of Angular changes in U1-SN (°), U1-PP (°), IMPA (°) measurements. Investigation of Distance changes in Overjet (mm), Overbite (mm), U1-VRL (mm), and U6-VRL (mm) measurements. |
| Soft tissue changes | Through study completion, an avarage of 6 months | Investigation of Angular changes in soft tissue convexity (°), NA-Pog (°) measurements. Investigation of Distance changes in VRL-prn (mm), VRL-Is (mm), VRL-li (mm), VRL-pog (mm), and ANS-Me (mm) measurements. |
Countries
Turkey (Türkiye)
Outcome results
None listed