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作者对临床常用的四种橡皮链，在三种不同长度情况下作了力学性能测定。结果显示橡链类型不同，其性能有差异；橡皮链越长，释放的力值超柔和、越稳定。研究结果提示临床上应选用不同类型和不同长度的橡皮键，以产生合适的矫治力．
The author of the clinical commonly used four rubber chains, made in three different lengths of the mechanical properties of the determination. The results showed that the different types of rubber, the performance differences; rubber longer chain, the release of super-soft, more stable. The results suggest that clinically should use different types and different lengths of rubber keys to produce the correct orthodontic.