Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
This prospective clinical study aimed to compare the skeletal and dentofacial effects of Twin Block (TWB) and clear aligners with mandibular advancement, and to evaluate mandibular trabecular bone changes through fractal analysis (FA).
A total of 34 patients with dentoskeletal Class II malocclusion were included in the study: 16 patients in the Invisalign® Mandibular Advancement (MA) group and 18 patients in the TWB group .Panoramic and lateral cephalometric radiographs were obtained at baseline(T0) and after functional treatment(T1). Skeletal, dental, and soft tissue structures were evaluated on the pretreatment and posttreatment radiographs using cephalometric analysis, while trabecular bone architecture was assessed by fractal analysis.
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Clear Aligner Group | Experimental | Mandibular advancement with clear aligners |
|
| Twinblock Group | Experimental | Mandibular Advancement with Twinblock Functional Appliance |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Invisalign Clear Aligners | Device | Functional appliances are used for mandibular advancement in the treatment of mandibular retrognathia in orthodontics. The Twinblock is a conventional functional appliance, and nowadays mandibular advancement can also be achieved with clear aligners. In this study, these two appliances were used. |
| Measure | Description | Time Frame |
|---|---|---|
| Change from Baseline in Cephalometric Measurements (mm and degrees) After Functional Appliance Therapy | Cephalometric measurements will be evaluated on lateral cephalometric radiographs using a customized analysis derived from Steiner, McNamara, Tweed, Ricketts, and Arnett analyses. A total of 47 skeletal, dental, airway, hyoid, and soft tissue parameters will be assessed. Linear measurements will be recorded in millimeters (mm) and angular measurements in degrees. Landmarks will be manually identified on digital lateral cephalometric radiographs. | Baseline and after completion of functional appliance therapy (approximately 7-13 months) |
| Change from Baseline in Mandibular Bone Fractal Dimension Values After Functional Appliance Therapy | Fractal dimension values will be calculated using the box-counting method on panoramic radiographs (mandibular condyle, angulus, and corpus) and lateral cephalometric radiographs (symphysis). Fractal dimension is a unitless numerical value used to evaluate trabecular bone complexity. Higher values indicate greater trabecular complexity, whereas lower values indicate reduced trabecular structure. | Baseline and after completion of functional appliance therapy (approximately 7-13 months) |
Not provided
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
Not provided
Not provided
Not provided
| Name | Affiliation | Role |
|---|---|---|
| Ezgi Sunal Akturk, Assistant Professor | Saglik Bilimleri Universitesi | Study Chair |
| Gokmen Kurt, Professor | Bezmialem Vakif University | Study Chair |
| Ahsen Irem Toktas, Research Assistant | Bezmialem Vakif University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Bezmialem Vakif University | Istanbul | Fatih | 34093 | Turkey (Türkiye) |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
|
| Twinblock Functional Appliance | Device | Functional appliances are used for mandibular advancement in the treatment of mandibular retrognathia in orthodontics. The Twinblock is a conventional functional appliance, and nowadays mandibular advancement can also be achieved with clear aligners. In this study, these two appliances were used. |
|
| ID | Term |
|---|---|
| D057887 | Overbite |
| ID | Term |
|---|---|
| D008312 | Malocclusion, Angle Class II |
| D008310 | Malocclusion |
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
Not provided
Not provided