[Role of tooth extractions in orthodontics].

Extraction therapy can be applied only under strict observation of indications. It requires thorough knowledge of the laws governing the migration of teeth after extraction, the normal development of the orofacial system and normal eruption of teeth. Careless extractions performed without thorough prior analysis cause irreparable harm instead of improving the situation. In the majority of cases extraction must be followed by appliance therapy to achieve controlled closure of the spaces, align the teeth in the dental arch and restore proper occlusion. The mode and extent of this treatment must be planned at the outset.