在公钥密码运算中，存在较多的取模操作。
Public key cryptographic arithmetic consists of many modular reduction operations.
但是，如果对浮点数使用取模和求余数操作符，则会产生错误，因为这些操作符只支持整数。
However, an error will be raised when using an equivalent of the modulus and remainder operators on floating values, as these support only integer values.
方法：对87颗残根残冠采用改良法进行根管取模，观察其临床效果，并进行分析、总结。
Methods: We took dental impression with this method for 87 residual roots or crowns, Clinical effect was analyzed and summarized.
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