A long-term follow-up of four cases treated with the Andresen appliance.

Four patients treated with Andresen appliances were recalled 20 years after treatment. While the results were quite acceptable to the patients, rather more change had occurred than might have been expected, especially in relation to continued growth after one would have expected it to have ceased, and in relation to the degree of the occlusal changes accompanying this growth. They demonstrate that a result thought to be stable even four years after treatment can change markedly well into adulthood.