By contrast, it was 98% above the curve of canal. The ratio of enlarging instruments removal was 98%, fissure burs 100%, broaches 50%.

直根管或根管弯曲以上折断器械因器械类型有较大差异，根管扩大器械取出率为98%、裂钻为100%，拔髓针为50%。

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By contrast, it was 98% above the curve of canal. The ratio of enlarging instruments removal was 98%, fissure burs 100%, broaches 50%.

直根管或根管弯曲以上折断器械因器械类型有较大差异，根管扩大器械取出率为98%、裂钻为100%，拔髓针为50%。

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