Guide post for trephine
OwnerHans Gustav Kurerinventor
Life of this patent
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Abstract
A bore is cut into bone tissue to receive an inserted pin or post (7, 23). A pilot bore (2, 22) is formed with a reamer; the post is fixed in the bore, and an enlarged region (16, 29, 30, 31, 32) is formed at the top end of the bore using a tubular cutter (10, 17, 26) which is guided on the post. The enlarged region can be accurately cut even with a hand drill due to the guidance provided by the post. The cutter may have holes (15) or channels for circulation of cooling/lubricating liquid, and a swarf-removing slot (13) may be provided. When the technique is used in dentistry for replacement of a tooth crown, a tubular support element (29a) is fixed around the post in the bore enlargement.
Claims19
A method for surgically cutting a bore for location of an insert in bone tissue comprising the steps of:
- cutting a pilot bore (2, 22) in the bone tissue from a surface thereof, locating a guide post (7, 23) in the bore, and forming an elongate enlarged region (16, 29, 30, 31, 32) around the pilot bore with an elongate tubular cutter (10, 17, 26), the elongate tubular cutter being located co-axially around and in contact with the said guide post so as to be longitudinally guided thereby.
Cutting apparatus for use in the cutting of an elongate enlarged region of a bore in bone tissue comprising a drill cutter (4) with which to form a pilot bore, an optional tap (6) to produce a thread in the pilot bore if required, a guide post (7, 23) for insertion into and secure location within the pilot bore, and an elongate tubular drill cutter (10, 17, 26) which fits co-axially in close fit around the guide post so as to be rotatable and axially slideable relative thereto.
A method for providing anchoring for attachment of a crown or dental superstructure to a residual tooth understructure (root) comprising the steps of:
- fixing a post (23) within a bore (22) in the root so that an upper end region (24) of the post projects upwardly above a top end (coronal surface) of the bore, forming an elongate enlarged coronal region (29, 32) of the bore with an elongate tubular cutter (26) with the cutter located co-axially around the projecting portion of the post, and fixing a support element (29a) around the post within the elongate enlarged coronal region of the bore.
Dental anchoring apparatus for use in fixing a dental superstructure to a residual tooth understructure comprising a post (23) for fixing within a bore in the understructure so that an upper end region of the post projects upwardly above a top end of the bore, an elongate tubular cutter (26) which fits coaxially in close fit around said upper end region and a lower adjacent region of the post so as to be rotatable and axially slidable relative thereto, for cutting an elongate enlarged region of the bore, and a support element (29a) adapted to fit closely around said lower adjacent region of the post.
Dependencies are inferred from the claim text.