| 摘要 |
An instrument for use in drilling a hole into a bone is provided. The instrument monitors the depth of the hole and prevents the drill from drilling too deep. Additionally, the instrument ensures that the hole reaches the desired depth. The instrument includes a sleeve, including a depth gauge for setting the depth of the hole to be drilled, a slide, including a releasable locking mechanism and being axially disposed within the sleeve and a drill including a shaft defining a shoulder. The desired depth of the hole is set on the depth gauge and the drill is axially inserted into slide. The instrument contacts the bone via teeth on the sleeve and the drill advances into the bone until the shoulder contacts the slide. Additionally, the instrument may be used to monitor the depth of tapping of the hole.
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