Scissors-bite is a rare condition but not uncommon to appear with Angle's Class II division 2 malocclusion which characterized with deep overbite and retroclined maxillary incisors. The most frequently involved teeth of scissors-bite are second molars. Maxillary second molars tend to erupt buccally while mandibular second molars tend to tilt lingually during mixed to permanent dentition.
Nonsurgical treatment of scissors-bite usually employs transpalatal arch appliance, interarch elastics, removable bite plate with extending hooks and temporary anchorage devices (TADs). With elastomeric chain or other traction force, TADs can prevent side effects such as extrusion of posterior teeth and clockwise rotation of mandible. It is also easier for patient to adapt with no further cooperation.
This case report presents a young female adult who had Class II division 2 malocclusion with deep overbite and bilateral scissors-bite. The treatment plans included intrusion of incisors, scissors-bite correction with removable bite plate for disocclusion, TADs to assist maxillary molar intrusion, mandibular molar uprighting and vertical dimensional control.