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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.
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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Miniplate Group (MP) | Experimental | 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). |
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| Acrylic Splint Group (AS) | Experimental | 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). |
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| Palatal Miniscrew Supported Acrylic Splint Group (MS) | Experimental | 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). |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Skeletal anchorage and intermaxillary elastic assisted maxillary protraction | Device | maxillary protraction with corticotomy-assisted different miniplate and intermaxillary elastic applications after growth spurt in patients with skeletal Class III malocclusion |
| Measure | Description | Time Frame |
|---|---|---|
| Maxillomandibular sagittal changes | 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. | Through study completion, an avarage of 6 months |
| Vertical changes | Investigation of Angular changes in Y-axis angle (°), SN-GoGN (°), SN-PP (°), Jarabak ratio measurements. Investigation of Distance changes in A-HRL (mm) measurement. | Through study completion, an avarage of 6 months |
| Dentoalveolar changes | 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. | Through study completion, an avarage of 6 months |
| Soft tissue changes | 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. | Through study completion, an avarage of 6 months |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Ahmet YAÄžCI, Professor | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Erciyes University Faculty of Dentistry, Department of Orthodontics | Kayseri | Kayseri | 38039 | Turkey (Türkiye) |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 19761906 | Background | De Clerck HJ, Cornelis MA, Cevidanes LH, Heymann GC, Tulloch CJ. Orthopedic traction of the maxilla with miniplates: a new perspective for treatment of midface deficiency. J Oral Maxillofac Surg. 2009 Oct;67(10):2123-9. doi: 10.1016/j.joms.2009.03.007. No abstract available. | |
| 24913740 | Background | Yilmaz HN, Garip H, Satilmis T, Kucukkeles N. Corticotomy-assisted maxillary protraction with skeletal anchorage and Class III elastics. Angle Orthod. 2015 Jan;85(1):48-57. doi: 10.2319/121513-921.1. |
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| ID | Term |
|---|---|
| D008313 | Malocclusion, Angle Class III |
| ID | Term |
|---|---|
| D008310 | Malocclusion |
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
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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).
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| 30345472 | Background | Willmann JH, Nienkemper M, Tarraf NE, Wilmes B, Drescher D. Early Class III treatment with Hybrid-Hyrax - Facemask in comparison to Hybrid-Hyrax-Mentoplate - skeletal and dental outcomes. Prog Orthod. 2018 Oct 22;19(1):42. doi: 10.1186/s40510-018-0239-8. |
| 18331946 | Background | Kircelli BH, Pektas ZO. Midfacial protraction with skeletally anchored face mask therapy: a novel approach and preliminary results. Am J Orthod Dentofacial Orthop. 2008 Mar;133(3):440-9. doi: 10.1016/j.ajodo.2007.06.011. |
| 24373654 | Background | Sar C, Sahinoglu Z, Ozcirpici AA, Uckan S. Dentofacial effects of skeletal anchored treatment modalities for the correction of maxillary retrognathia. Am J Orthod Dentofacial Orthop. 2014 Jan;145(1):41-54. doi: 10.1016/j.ajodo.2013.09.009. |