Clinical Evaluation of Bio-creative Therapy for En Masse Retraction of the Maxillary Anterior Teeth
Malocclusion, Angle Class II, Division 1
About this trial
This is an interventional treatment trial for Malocclusion, Angle Class II, Division 1 focused on measuring en masse retraction, biocreative therapy, class II, skeletal anchorage
Eligibility Criteria
Inclusion Criteria:
- Full permanent dentition (excluding third molars)
- Angle class II malocclusion with increased overjet. Treatment plan includes extraction of the upper first premolars and retraction of the maxillary anterior teeth with maximum anchorage.
Exclusion Criteria:
β’ Systemic diseases (examples include bleeding disorders, bisphosphonate therapy, chemotherapy, and radiotherapy) or craniofacial anomaly.
- Previous orthodontic treatment.
- Obvious periodontal disease and signs of bone loss.
Sites / Locations
Arms of the Study
Arm 1
Arm 2
Experimental
Active Comparator
Labial biocreative therapy group
Lingual biocreative therapy group
Upper six anterior teeth will be bonded (0.018-inch slot brackets), leveled and aligned until reaching 0.017*0.025 stainless steel archwire. Right and left bracket head mini-screw (1.6*8 mm) will be inserted under local anaesthetic into the inter-radicular space between upper second premolar and first molar at the level of mucogingival junction. Crimpable hooks (10 mm) will be crimped onto the archwire between the upper lateral incisor and canine. 200 grams retraction force will be applied using NiTi coil springs from the hooks to the minscrew on both sides. Overlay reverse curve 0.016*0.022 NiTi will be inserted posteriorly into the mini-screw and ligated anteriorly to the archwire in the midline.
En masse retraction of the six anterior teeth was accomplished using a lingual retractor bonded on to the lingual surface of the 6 anterior teeth, C-palatal plate fixed near the median palatal suture with 3 micro-screws, and Nickel Titanium (Ni-Ti) closing coil springs to apply a force of 200 g per side (total 400 g) directly from the C-plate to the lingual retractor.