下颌恒尖牙与上颌恒尖牙髓腔形态区别点是A.下颌恒尖牙髓腔和根管都较上颌恒尖牙窄 B.下颌恒尖牙髓角较圆 C.下颌恒尖牙根管为双管者占4% D.下颌恒...

作者: tihaiku 人气: - 评论: 0

问题下颌恒尖牙与上颌恒尖牙髓腔形态区别点是

选项 A.下颌恒尖牙髓腔和根管都较上颌恒尖牙窄 B.下颌恒尖牙髓角较圆 C.下颌恒尖牙根管为双管者占4% D.下颌恒尖牙根尖孔多位于根尖顶 E.以上都是

答案 E

解析下颌恒尖牙的髓腔与上颌恒尖牙相似，髓腔亦为唇舌径大而近远中径很窄。其不同点为髓室和根管都较上尖牙者窄、髓角较圆，下颌尖牙通常为单根管，根管为双管者占4%，根尖孔多位于根尖顶。

分享到：

猜你喜欢

发表评论

更多 网友评论 （0 条评论）

暂无评论

错误啦！

消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
文件: /twcms/kongphp/cache/cache_redis.class.php
位置: 第 85 行

<?php echo 'KongPHP, Road to Jane.'; ?>