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| Name | Class |
|---|---|
| Ortoestetic (https://ortoestetic.com) | UNKNOWN |
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This retrospective non-randomized controlled clinical trial aimed to compare the skeletal and dentoalveolar effects of two orthopedic treatment protocols for skeletal Class III malocclusion in growing patients: a conventional tooth-borne rapid maxillary expansion combined with facemask therapy, and a hybrid skeletal anchorage expander combined with chin-plate traction. Lateral cephalometric changes before and after maxillary protraction were analyzed to assess sagittal skeletal correction and dentoalveolar effects.
Skeletal Class III malocclusion is frequently associated with maxillary growth deficiency and presents significant functional and esthetic challenges. Conventional treatment using rapid maxillary expansion combined with facemask therapy is effective but limited by patient compliance and undesirable dentoalveolar effects. The introduction of skeletal anchorage devices allows the application of orthopedic forces with reduced dental compensation and extended effectiveness beyond early growth stages.
This study retrospectively evaluated growing patients (CVS1-CVS3) treated with either a tooth-borne expander and facemask or a hybrid skeletal anchorage expander combined with chin-plate traction. Cephalometric variables were measured before treatment (T0) and after completion of maxillary protraction (T1) to compare skeletal and dentoalveolar changes between protocols.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Tooth-Borne Expander with Facemask (FM) | Active Comparator | Bonded acrylic splint-type Hyrax expander with hooks in the maxillary canine region. Expansion activated once daily (0.25 mm). Facemask therapy initiated two weeks after expansion onset with 400 g per side of elastic traction, directed approximately 30° downward relative to the occlusal plane, worn 14-16 hours per day. |
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| Hybrid Skeletal Anchorage Expander with Chin-Plate (SA) | Experimental | Modified Hybrid Hyrax expander supported by first molars and anchored with miniscrews placed bilaterally in a paramedian position. Expansion activated once daily (0.25 mm). Mandibular chin-plates (bollard-type or single chin-plate depending on eruption stage) were surgically inserted, and Class III elastics delivering 400 g per side were applied following a progressive loading protocol. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Tooth-Borne Expander with Facemask (FM) | Device | Bonded acrylic splint-type Hyrax expander with hooks in the maxillary canine region. Expansion activated once daily (0.25 mm). Facemask therapy initiated two weeks after expansion onset with 400 g per side of elastic traction, directed approximately 30° downward relative to the occlusal plane, worn 14-16 hours per day. |
| Measure | Description | Time Frame |
|---|---|---|
| Change in sagittal skeletal relationship | Changes in the cephalometric angles SNA, ANB, and Wits appraisal measured on lateral cephalograms between T0 and T1 | From baseline (T0) through study completion, an average of 1 year (T1) |
| Measure | Description | Time Frame |
|---|---|---|
| Cephalometric vertical skeletal changes | o Cephalometric vertical measurements from T0 to T1, using a customized cephalometric analysis based on Steiner, Tweed, and McNamara references: Mandibular plane to SN (Sella-Nasion) angle, ANS (Anterior Nasal Spine)-PNS (Posterior Nasal Spine) to Mandibular plane angle, and ANS-PNS to SN angle | From baseline (T0) through study completion, an average of 1 year (T1) |
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Inclusion Criteria
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Beatriz Celis, Postdoc | Contact | +34 913941923 | beatrizcelisgonzalez@gmail.com |
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Upon request
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A retrospective non-randomized controlled clinical trial
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| Hybrid Skeletal Anchorage Expander with Chin-Plate (SA) | Device | Modified Hybrid Hyrax expander supported by first molars and anchored with miniscrews placed bilaterally in a paramedian position. Expansion activated once daily (0.25 mm). Mandibular chin-plates (bollard-type or single chin-plate depending on eruption stage) were surgically inserted, and Class III elastics delivering 400 g per side were applied following a progressive loading protocol. |
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| Cephalometric dentoalveolar changes | o Upper and lower incisor inclination changes from T0 to T1 using a customized cephalometric analysis based on Steiner, Tweed, and McNamara references: U_SN (Upper incisor to Sella-Nasion)and IMPA (Lower Incisor Mandibular Plane Angle) | From baseline (T0) through study completion, an average of 1 year (T1) |
| Treatment duration | o Time elapsed between T0 and T1 | From baseline (T0) through study completion, an average of 1 year (T1) |
| ID | Term |
|---|---|
| D008313 | Malocclusion, Angle Class III |
| ID | Term |
|---|---|
| D008310 | Malocclusion |
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
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