Components for guided threading of bone

Abstract

In certain embodiments, a combination of a guide sleeve for a surgical template, a drill, and a thread forming tool is disclosed. The guide sleeve has a guide surface for guiding the thread forming tool. The drill has at least one cutting edge for cutting a recess in bone. The thread forming tool has a thread forming section for forming at least one thread in bone, and a guide section for guidance by the guide surface of the guide sleeve, the thread forming section comprising an apical portion, and a coronal portion. In certain embodiments, a maximum diameter of the apical portion of the thread forming section is smaller than or equal to a maximum diameter of the cutting edge of the drill.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a national stage application under 35 U.S.C. §371 of PCT Application No. PCT / EP2010 / 005448, filed on Sep. 6, 2010, which published in English as WO 2011 / 026643 A1 on Mar. 10, 2011 and which claims priority benefit of European Patent Application No. 09011434.9, filed on Sep. 7, 2009, the entire contents of which applications and publication are herein incorporated by reference in their entirety.BACKGROUND[0002]1. Field of the Invention[0003]This invention pertains in general to the field of implant surgery. More particularly, the invention relates to a combination of components for guided threading of bone, wherein a guide sleeve may guide a drill for the formation of a recess in bone as well as a thread forming tool for forming threads in the recess. Also, the guide sleeve may guide installation of an implant in the recess to a pre-planned position. The guide sleeve may be part of a surgical template, for example plann...

AI Technical Summary

Benefits of technology

[0026]Some embodiments of the disclosure provide for improved accuracy of a position of an implant in bone, for example in a position planned before the surgical intervention. Some embodiments of the disclosure provide for reducing or eliminating one or several of an angular, a vertical, a centering, and / or a lateral deviation compared to a planned position of the implant. Some embodiments of the disclosure also provide for using bone-condensing implants, such as implants tapering outwards from its apical end towards its coronal end, in guided implant surgery.

Problems solved by technology

If, for example, the bone is denser on one side of the central longitudinal axis of the implant, it will often deviate towards the softer bone, and end up in a non-optimal position, which is different from a planned position.

If this happens during guided surgery, the implant mount, which is guided by a guide sleeve of the surgical template, may jam in the guide sleeve.

For both types of implants it is difficult to provide guidance between the implant mount and the surgical template, since there is sometimes not enough space available, such as in the oral cavity, to make the distance from the bone to the coronal end of the guide sleeve long enough.

This may lead to deviations of the implant from its planned position as the implant starts generating threads before the implant mount is guided, which in turn may lead to stresses in the surgical template without the possibility to end up in the planned position.

Since often several implants are placed using a single surgical template, a deviation of one implant inevitably affects the possibility to place another implant in its planned position, such as if the entire surgical template has moved from its accurate position relative to the bone of the patient.

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