Identify the contraindication of dental extraction for orthodontic purposes.

Identify the contraindication of dental extraction for orthodontic purposes.

• A. Dental protrusion
• B. Tooth impacted
• C. Class II/2 Angle malocclusion in permanent dentition
• D. Dento-alveolar disharmony with moderate crowding, the presence of the third molar and hipodivergent facial type

Answer: (D)

The main idea is that deciding to extract in orthodontics isn’t based on crowding alone; the patient’s facial and skeletal pattern strongly influence whether extraction will help or harm. In this scenario, dento-alveolar disharmony with moderate crowding, the presence of third molars, and a hypodivergent (low-angle) facial pattern together point away from extraction. A low vertical dimension means the profile is more sensitive to changes that pull the front teeth back. Extracting premolars and retracting incisors in these patients can reduce lip support and worsen facial aesthetics or overall facial balance. The third molars add another layer of space considerations: their presence can allow the arch to adapt or erupt to help resolve crowding without removing teeth, so initiating extractions might unnecessarily disrupt this potential compensation and lead to instability. For these reasons, extraction is not the preferred approach in this combination and non-extraction or alternative mechanics that preserve anterior balance are favored.

The main idea is that deciding to extract in orthodontics isn’t based on crowding alone; the patient’s facial and skeletal pattern strongly influence whether extraction will help or harm.

In this scenario, dento-alveolar disharmony with moderate crowding, the presence of third molars, and a hypodivergent (low-angle) facial pattern together point away from extraction. A low vertical dimension means the profile is more sensitive to changes that pull the front teeth back. Extracting premolars and retracting incisors in these patients can reduce lip support and worsen facial aesthetics or overall facial balance. The third molars add another layer of space considerations: their presence can allow the arch to adapt or erupt to help resolve crowding without removing teeth, so initiating extractions might unnecessarily disrupt this potential compensation and lead to instability. For these reasons, extraction is not the preferred approach in this combination and non-extraction or alternative mechanics that preserve anterior balance are favored.