Grooved intraosseous dental drill bit

摘要

This application relates to a dental apparatus for the initial and subsequent guidance of hypodermic needles, or similar drug delivery devices into the cortical plate of human mandibular and maxillary bones. The invention comprises a solid drill bit bearing a channeling groove along the majority of the shaft. The groove is scalloped at its delivery end to flex the needle tip and deflect the tip out from the drill and into the desired tissue. Variations are described, with the preferred embodiment having the circumference of the drill bit reduced in girth for the length bearing the groove. This permits an inexpensive plastic covering which serves as a practical seal against bacteria. The seal is permeable to the needle's tip and closes back on itself after withdrawal of the needle.