You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The methods of modifying stainless steel crowns for primary teeth were given by: and explain in detail?
In 1971, Mink and Hill reported several ways of modifying the stainless steel crown when the crowns are either too large or too short.