¿ The premature loss of teeth is an unfortunate occurrence. The previous information is a brief and simple approach to space maintenance, but there may be specific situations that will require alternative therapy. Each situation needs to be assessed thoroughly to provide, therefore, the best approach, the knowledge of using the appropriate appliance at the right time, and then possessing the ability to inform the parents of the need for any future changes or modifications, is an important aspect of space maintenance treatment planning.