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The prosthodontic management of a 7-year-old girl with induced dental agenesis is described. The mandibular posterior tooth germs had been removed during surgical excision of a melanotic neuroectodermal tumor of infancy, at the age of 2 months. The ongoing prosthodontic treatment, now in its eighth year, was implemented by regular follow-up of the operation outcome and by targeted orthodontic intervention. The treatment plan included the provision of four successive interim removable partial dentures. Care was taken to preserve the oral structures, adapt to the morphological changes, and satisfy the needs of the child. Due to the unfavorable biomechanical conditions, retention and stability problems were encountered. These were resolved by engaging the mechanism of neuromuscular adaptation through optimization of the shape of the denture base. For children and adolescents with extensive dental agenesis, prosthodontic management with interim removable dentures supports function, restores esthetics, and provides a solid basis for the definitive treatment.