US-12622708-B2 - Bone material removal device and a method for use thereof

US12622708B2US 12622708 B2US12622708 B2US 12622708B2US-12622708-B2

Abstract

A bone material removal device including a cannula, a bone drilling forward tip and a bore widening element including a bone carving portion that slides axially relative to the cannula and extends in a circumferential direction and wherein the axial movement of the bore widening element relative to the cannula brings a carving portions to travel and extend radially in a circumferential direction beyond a surface of the cannula and carve bone from a wall of a bore.

Inventors

Leon SLOBITKER
Hagay Sitry
Alexander Kotov
Ran Weisman

Assignees

T.A.G. MEDICAL PRODUCTS CORPORATION LTD.

Dates

Publication Date: 20260512
Application Date: 20230920

Claims (20)

1 . A bone material removal device, comprising: a cannula having a distal end; and an elastic member including a forward tip and a bore widening element, said bore widening element including a radially extending eccentric protrusion having a carving portion including a carving edge configured to contact a bone; wherein said elastic member is configured to be in a first position wherein said bore widening element is elastically radially compressed inside said cannula, and wherein said bore widening element being operative to axially move relative to said cannula; and wherein said bore widening element is configured to be radially extended by said axial movement, from said first position wherein said carving portion is retracted to within a diameter of said cannula to a second position wherein said carving portion is radially extended in a circumferential direction beyond said diameter of said cannula; wherein the entire said carving edge is configured to be moved axially past said distal end of said cannula to said second position.
2 . A device according to claim 1 , wherein the elastic member is moveably housed in the cannula.
3 . A device according to claim 1 , wherein the forward tip is a bore drilling tip.
4 . A device according to claim 1 , wherein the cannula includes an inwardly tapered portion located adjacent to said distal end of the cannula.
5 . A device according to claim 1 , wherein said cannula has a distal end having an inner circumference and wherein a diameter of said cannula distal end inner circumference is substantially equal to an outer diameter of a thickest portion of said elastic member and supports axial and rotational movement and no radial movement of the elastic member.
6 . A device according to claim 3 , wherein in operation, a point of contact between the bore drilling tip and a bone surrounding the bore drilling tip defines a first shaft capture point, and a point of contact between the bore widening element and an inner circumference of the cannula defines a second shaft capture point, wherein axial movement of the elastic member with respect to the cannula shortens a distance between the first shaft capture point and the second shaft capture point, increasing a rigidity of the bone widening element and bringing the carving portion to be translated radially.
7 . A device according to claim 3 , wherein in operation, a point of contact between the bore drilling tip and a bone surrounding the bore drilling tip defines a first shaft capture point, and a point of contact between the bore widening element and an inner circumference of the cannula defines a second shaft capture point, wherein contact of the elastic member with a tip of the cannula creates a third shaft capture point being at or below a threshold length from the first shaft capture point, wherein the distal end of the bore widening element is configured to lose its resilience at the third shaft capture point and to become rigid, causing the carving portion to be translated radially.
8 . A device according to claim 1 , wherein said carving portion is located at a non-zero distance from said tip.
9 . A device according to claim 1 , wherein resilience of the elastic member supports accommodation of the bore widening element within a bore drilled by the forward tip, said elastic member configured to conform to a diameter of the bore.
10 . A device according to claim 1 wherein said device has a longitudinal axis and wherein, when said elastic member distal end is supported by a bore drilled by said forward tip, at least a peak of the carving portion does not protrude radially and remains generally aligned with the device longitudinal axis.
11 . A device according to claim 1 , wherein said carving portion comprises at least one carving edge.
12 . A device according to claim 1 , wherein said carving portion comprises at least first and second carving edges.
13 . A device according to claim 12 , wherein axial movement of said device is convertible to radial translation and extension of said at least first and second carving edges by means of transition of said device from a resting state to a stressed state and vice versa.
14 . A device according to claim 1 , wherein said device has a longitudinal axis, a first generally cylindrical portion proximal to said bore widening element, and a second generally cylindrical portion distal to said bore widening element; and wherein said second cylindrical portion is radially deflectable such that said first cylindrical portion is not aligned with said longitudinal axis.
15 . A device according to claim 1 , wherein said protrusion has a generally convex outer surface including said carving portion.
16 . A device according to claim 15 , wherein said protrusion has a generally concave inner surface.
17 . A device according to claim 15 , wherein said protrusion has a generally flat inner surface.
18 . A device according to claim 1 , wherein said device has a longitudinal axis, a first generally cylindrical portion proximal to said bore widening element, and a second generally cylindrical portion distal to said bore widening element; and wherein said second cylindrical portion is radially deflectable such that said second cylindrical portion is not aligned with said longitudinal axis.
19 . A device according to claim 1 , wherein said elastic member includes a distal end comprising first and second substantially straight portions, said bore widening element joined to said first and second substantially straight portions.
20 . A device according to claim 19 , wherein in the cannula the elastic member is in a stressed state in which said first and second substantially straight portions are not aligned with a longitudinal axis of the device.

Description

RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 16/561,089 filed on Sep. 5, 2019, which is a continuation of U.S. patent application Ser. No. 15/318,677 filed on Dec. 14, 2016, now U.S. Pat. No. 10,448,959, which is a National Phase of PCT Patent Application No. PCT/IL2016/050370 having International Filing Date of Apr. 7, 2016, which claims the benefit of priority under 35 USC § 119(e) of U.S. Provisional Patent Application Nos. 62/144,991 filed on Apr. 9, 2015 and 62/151,375 filed on Apr. 22, 2015. The contents of the above applications are all incorporated by reference as if fully set forth herein in their entirety. FIELD OF THE INVENTION The present invention, in some embodiments thereof, relates to bone removal devices, and more particularly, but not exclusively, to devices that change effective diameter of bores. BACKGROUND OF THE INVENTION Various orthopedic reconstructive procedures and particularly ligament or tendon reconstructive procedures such as, for example, Anterior Cruciate Ligament (ACL) reconstruction require, implantation of a surgical tissue graft (e.g., ligament graft) inserted into the bone in order to replace the injured tissue. The injured tissue is removed from the bone before the graft is inserted through a bore created by drilling. Some ligament or tendon reconstructive procedures benefit from drilling an undercut deep to the surface of the bone to accommodate an anchor for the implanted tissue. Some commonly used devices that produce an undercut in bone employ a blade having a single carving edge that circumferentially scrapes and widens a portion of a wall of a drilled bore. Such techniques utilize high friction between the blade and bone not only requiring an effort to operate but may also produce debris mainly consisting of small particles that may interfere with anchor placement and removal of which may be challenging. Various drilling tools employed to produce undercuts along bores drilled in bone rely on moveable components such as hinges, springs and similar to operate that may be expensive to manufacture and may tend to wear down and malfunction over time. Operation of such tools may also be somewhat cumbersome to handle and require several operational steps to function. SUMMARY OF THE INVENTION According to an aspect of some embodiments of the present invention there is provided a bone material removal device, comprising a forward tip, a cannula, a bore widening element including a bone carving portion, the element operative to axially slide relative to the cannula and at least partially extend in a circumferential direction and wherein axial movement of the bore widening element as a whole relative to said cannula radially extends said carving portion that travels and extends radially bringing the bore widening element from a closed retracted position in which the bone carving portion is retracted to within a diameter of the cannula or a virtual axial extension thereof to an open extended position in which the bone carving portion extends in a circumferential direction beyond a diameter of a surface of the cannula or virtual extension thereof and carves bone from a wall of a bore. According to an aspect of some embodiments of the present invention there is provided at least one resilient arm including at least one carving portion at the end thereof; and wherein axial movement brings the at least one arm to engage a fixed surface that geometrically interferes with the axial movement and bends the arm deflecting the carving portions that travels and extends radially in a circumferential direction beyond a surface of the cannula and carves bone from a wall of a bore. According to an aspect of some embodiments of the present invention there is provided a bone material removal device having a single elastic member bore widening element wherein the bore widening element includes at least two distally extending arms having at least one carving portion at a distal end thereof and separated by a longitudinal recess having a proximal closed end and a distal open end. According to an aspect of some embodiments of the present invention there is provided a bone material removal device having a single elastic member bore widening element having one or more arms that define a widened portion at the distal end of the bore widening element that includes the carving portion and defines a distally facing inwardly proximally tapered surface at a distal aspect of the carving portion. According to an aspect of some embodiments of the present invention there is provided a bone material removal device having a carving portion that includes at least one carving edge. According to an aspect of some embodiments of the present invention there is provided a bone material removal device having a carving portion comprises at least two first and second carving edges angled in respect to each other and joined at least at one end. According to an aspect of so