桩核冠修复时,桩的长度为根长的A. 1/5?1/4 B. 1/4?1/3 C. 1/3?1/2 D. 2/3?3/4 E. 1/2

作者: tihaiku 人气: - 评论: 0
问题 桩核冠修复时,桩的长度为根长的
选项 A. 1/5?1/4 B. 1/4?1/3 C. 1/3?1/2 D. 2/3?3/4 E. 1/2
答案 D
解析 为确保牙髓治疗效果和预防根折,一般要求根尖部保留3?5mm的充填材料,桩的长度为根长的2/3?3/4。

相关内容:桩核,长度

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