US20230255670A1

US20230255670A1 - Threadless Friction Fit Surgical Implant

Info

Publication number: US20230255670A1
Application number: US18/088,534
Authority: US
Inventors: Frank Castro
Original assignee: Blue Sky Technologies LLC
Current assignee: Blue Sky Technologies LLC
Priority date: 2022-02-15
Filing date: 2022-12-24
Publication date: 2023-08-17
Also published as: US20230255690A1

Abstract

A threadless friction fit surgical implant suited for implantation or use in mammalian spinal or other boney tissues.

Description

PRIORITY

Applicant claims the benefit of U.S. Provisional Application No. 63/310,189, filed Feb. 15, 2022 and U.S. Provisional Application 63/317,041, filed Mar. 3, 2022.

BACKGROUND OF THE INVENTION

A. Field of the Invention

Among other things, the present invention is a threadless friction fit surgical implant. The current implant is particularly suited for implantation or use in mammalian spinal or other boney tissues. Embodiments of the current invention can include rough surfaces in anticipation of improving attachment of bone to the threadless friction fit surgical implant.

B. Description of the Previous Art

Any discussion of references cited in this Description of the Previous Art merely summarizes the disclosures of the cited references and Applicant makes no admission that any cited reference or portion thereof is relevant prior art. Applicant reserves the right to challenge the accuracy, relevancy and veracity of the cited references.
References that may indicate a state-of-the-art for the current invention include: 1) U.S. Pat. No. 7,993,347-Michlelson discloses a guard for use in performing human interbody surgery; 2) US Published Patent Application 20090312763-McCormack et al. discloses facet joint implants and delivery tools; 3) U.S. Pat. No. 8,012,186-Pham et al. discloses a uniplanar screw; 4) U.S. Pat. No. 8,764,804-Rezach discloses a bone fastener and methods of use; 5) U.S. Pat. No. 9,826,986-Donner et al. discloses systems for and methods of preparing a sacroiliac joint for fusion; and 6) US Published Patent Application 20150250518-Chirico et al. discloses implantable devices and methods for treating micro-architecture deterioration of bone tissue.

SUMMARY OF THE INVENTION

In the most general sense, the present invention is a threadless friction fit surgical implant that can be implanted between two boney segments. Frictional pressures generated by the two opposed boney segments in the surgically created cavity initially secure the threadless friction fit surgical implant. The current invention can be adapted for use with vertebra or other bone tissues. Polymethymethacrylate is an adhesive that can complement friction fit surgical implants. Use of threadless surgical implants can remove the risk of threads damaging bones and other tissues associated with traditional threaded implants.
An aspect of the present invention is to provide a threadless friction fit surgical implant.
Still another aspect of the present invention is to provide a threadless friction fit surgical implant including rough surfaces.
It is still another aspect of the present invention is to provide a threadless friction fit surgical implant having varied cross-sectional areas along the length of the threadless friction fit surgical implant.
Still another aspect of the present invention is to provide a threadless friction fit surgical implant including a conical segment.
It is still another aspect of the present invention to provide a conical segment including one or more openings.
Yet still another aspect of the present invention is to provide a threadless friction fit surgical implant including a conduit.
Still another aspect of the present invention is to provide a threadless friction fit surgical implant without a conduit.
It is still another aspect of the present invention to provide a threadless friction fit surgical implant with four distinct regions.
Yet still another aspect of the present invention is to provide a threadless friction fit surgical implant with wings or bulges.
Still another aspect of the present invention is to provide a threadless friction fit surgical implant including a blunt tip.
It is still another aspect of the present invention to provide a threadless friction fit surgical implant with a first portion that is offset from a second portion of the threadless friction fit surgical implant.
Yet still another aspect of the present invention is to provide a threadless friction fit surgical implant connectable to a device distinct from the threadless friction fit surgical implant.
A preferred embodiment of the current invention can be described as a threadless friction fit surgical implant comprising a cannula; the cannula comprising: a) a conduit adapted to carry one or more biocompatible substances; the conduit traversing an entire length of a longitudinal axis of the cannula; b) a barrier surrounding the conduit comprising a first cylindrical section without rough surfaces and a second section, adjacent to the first cylindrical section, with the rough surfaces; the first cylindrical section including a first diameter merged with the second section; and c) the second section comprising: i) a first segment proximate the first cylindrical section, wherein a portion of a cross-sectional diameter of the first segment is less than, equal to or greater than the first diameter; ii) a second segment merged and connected with the first segment; and iii) the second segment interrupted by one or more openings allowing interactions between the conduit and a surgically created environment proximate the threadless friction fit surgical implant.
Another preferred embodiment of the current invention can be described as a solid threadless friction fit surgical implant comprising: a) a longitudinal axis extending through the solid threadless friction fit surgical implant; the solid threadless friction fit surgical implant comprising an uninterrupted exterior; a first cylindrical section without rough surfaces and a second section, adjacent to the first cylindrical section, with the rough surfaces; the first cylindrical section including a first diameter merged with the second section; and b) the second section comprising: i) a first segment proximate the first cylindrical section, wherein a portion of a cross-sectional diameter of the first segment is less than, equal to or greater than the first diameter; and ii) a second segment merged and connected with the first segment.
Still another preferred embodiment of the current invention can be described as a threadless friction fit surgical implant comprising a first region, a second region, a third region and a fourth region; the regions being interconnected; the threadless friction fit surgical implant comprising: a) a conduit adapted to carry one or more biocompatible substances; the conduit traversing the first region, the second region and the third region and a barrier surrounding the conduit; b) the first region comprising a blunt tip, wherein outward dimensions of the first region are nearer to the conduit than outward dimensions of the second region and the third region; c) the third region comprising one or more wings or bulges incorporated with the barrier; the wings or bulges corresponding to a target zone for implantation; d) the first region, the second region and the third region comprising rough surfaces and one or more openings allowing interactions between the conduit and a surgically created environment proximate the threadless friction fit surgical implant; and e) the fourth region, without rough surfaces, connectable to a device distinct from the threadless friction fit surgical implant.
Yet another preferred embodiment of the current invention can be described as a threadless friction fit surgical implant comprising a first region, a second region, a third region and a fourth region; the regions being interconnected with an uninterrupted exterior; the threadless friction fit surgical implant comprising: a) the first region comprising a blunt tip, wherein outward dimensions the first region are nearer to the longitudinal axis of the threadless friction fit surgical implant than outward dimensions of the second region and the third region; b) the third region comprising one or more wings or bulges incorporated into the uninterrupted exterior; one or more wings or bulges corresponding to a target zone for implantation; c) the first region, the second region and the third region comprising rough surfaces; and d) the fourth region, without rough surfaces, connectable to a device distinct from threadless friction fit surgical implant.
It is the novel and unique interaction of these simple elements which creates the apparatus and methods, within the ambit of the present invention. Pursuant to Title 35 of the United States Code, descriptions of preferred embodiments follow. However, it is to be understood that the best mode descriptions do not limit the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective of a first preferred embodiment of the current implant.

FIG. 1 a is a perspective of a first preferred embodiment of the current implant.

FIG. 2 is a perspective of a first preferred embodiment of the current implant.

FIG. 2 a is a perspective of a first preferred embodiment of the current implant.

FIG. 3 is a perspective of a second preferred embodiment of the current implant.

FIG. 3 a is a perspective of a second preferred embodiment of the current implant.

FIG. 4 is a perspective of a second preferred embodiment of the current implant.

FIG. 4 a is a perspective of a second preferred embodiment of the current implant.

FIG. 5 is a perspective of a third preferred embodiment of the current implant.

FIG. 5 a is a perspective of a third preferred embodiment of the current implant.

FIG. 6 is a perspective of a third preferred embodiment of the current implant.

FIG. 6 a is a perspective of a third preferred embodiment of the current implant.

FIG. 7 is a perspective of a fourth preferred embodiment of the current implant.

FIG. 7 a is a perspective of a fourth preferred embodiment of the current implant.

FIG. 8 is a perspective of a fourth preferred embodiment of the current implant.

FIG. 8 a is a perspective of a fourth preferred embodiment of the current implant.

FIG. 9 is a lateral view of the current implant including a conduit and an attachable polyaxial head.

FIG. 10 is a lateral view of a current solid implant and an attachable polyaxial head.

FIG. 11 is a perspective of a fifth preferred embodiment of the current implant.

FIG. 12 is a perspective of a sixth preferred embodiment of the current implant.

FIG. 13 is a perspective of a seventh preferred embodiment of the current implant.

FIG. 14 is a perspective of an eighth preferred embodiment of the current implant.

FIG. 15 is a perspective of a ninth preferred embodiment of the current implant.

FIG. 16 is a perspective of a tenth preferred embodiment of the current implant.

FIG. 17 is a perspective of a prior art threaded pedicle screw.

FIGS. 18 a-c portray coronal slice views of pedicles with preferred embodiments of the current implant implanted into the pedicles.

FIG. 19 is a perspective of an eleventh preferred embodiment of the current implant.

FIGS. 20 a-20 f portray additional preferred embodiments of the current implant.

FIGS. 21 a-21 f portray additional preferred embodiments of the current implant with rough surfaces.

FIGS. 21 g-21 i portray preferred embodiments of the current implant including varying degrees of bulge (670).

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Although the disclosure hereof is detailed to enable those skilled in the art to practice the invention, the embodiments published herein merely exemplify the present invention.
In the most general sense, the present invention is a threadless friction fit surgical implant that can be implanted between two boney segments. The surgical implant is threadless. Frictional pressures generated by the two opposed boney segments in the surgically created cavity secure the surgical implant. The current invention can be adapted for use with vertebra or other bone tissues. The present threadless friction fit surgical implant is particularly adapted for use in the thoracic and lumbar regions of the spine. Polymethylmethacrylate is an adhesive particularly well suited for use with threadless friction fit surgical implants. Meeting a long felt but unfilled need in the orthopaedic surgical arts, the novel and unique structures of the present threadless friction fit surgical implant allow the surgical team to utilize a threadless rather than a threaded implant for select surgical procedures. Threadless surgical implants remove the risk of threads damaging bones and other tissues associated with traditional threaded implants.
Preferred embodiments of the present invention are manufactured of titanium alloys, stainless steel, non-resorbable polymers or any other composition acceptable in the art. Embodiments can be manufactured using additive techniques, subtractive techniques or a combination thereof.
By way of illustration, additive techniques, such as 3D printing, involve building the device out of microscopic metal particles. The device can be built particle by particle over the length of the device. Particles can be fused together to maximize density and create smooth (external) surfaces. It is believed that densely fused particles improve a 3D printed implant's biomechanical strength. Densely fused particles can also provide the 3D printed implant a smooth surface over which connectors and other devices can be attached. In contrast, particles fused together in clumps can create a rough or a porous texture. Rough or porous surfaces may sacrifice strength for the facilitation of bone ingrowth. In select preferred embodiments, rough surfaces can be included with a conduit of the current implant. Bone ingrowth within the implant can increase the implant's biomechanical strength and allow living bone or other tissues to grow into available spaces.
Subtractive manufacturing methods can start with a solid block of metal or other composition acceptable in the art that is larger in height, width and length than the end-embodiment's size. Subtractive manufacturing removes portions of the block to create the preselected dimensions of the implant. Abrasive particles, lasers and/or chemical treatments can be used to roughen the surface of the implant. During subtractive manufacturing of the implant, its total size decreases with each intervention.
Certain implants can be created by the combination of subtractive and additive manufacturing techniques where an additive rough surface is added to the implant initially created by subtractive manufacturing. For example, press-fit total hip and press-fit total knee implants can be manufactured with the combination of subtractive and additive manufacturing techniques.
It is believed that rough surfaces can assist with long term fixation of the implant by allowing more bone ingrowth onto and/or into the implant. Within the scope of the current threadless friction fit surgical implant, either additive or subtractive means or a combination thereof can create the rough surfaces for any exposed surface of the threadless friction fit surgical implant. For the purposes of this Application, “rough surfaces” are defined as, “biocompatible surfaces created by additive and/or subtractive means on any surface of the implant that can facilitate ingrowth or interdigitation of the host tissues with the implant.”
Within the scope of the present invention, it has advantageously been discovered that threadless friction fit surgical implants (620, 650, 690) can have lengths from about 20 to about 75 millimeters; polyaxial heads (100) can have lengths of from about 10 millimeters to about 25 millimeters.
FIGS. 1-4 a are lateral perspectives of threadless friction fit surgical implant (620).
In a preferred embodiment, threadless friction fit surgical implant (620) is provided with cannula (622). Cannula (622) includes conduit (624) adapted to carry one or more biocompatible substances. Conduit (624) traverses an entire length of a longitudinal axis of cannula (622).
Barrier (626) surrounds conduit (624). Barrier (626) can be provided with a first cylindrical section (628) with layers of rough surfaces (632) and a second section (630), adjacent to the first cylindrical section (628), with more layers of rough surfaces (632) than the first cylindrical section (628). First cylindrical section (628) includes a first diameter (634) merged with the second section (630). Second section (630) includes first segment (636) proximate the first cylindrical section (628). A portion of a cross-sectional diameter (638) of the first segment (636) is less than, equal to or greater than the first diameter (634). Second segment (640) is merged and connected with the first segment (636). Second segment (640) is interrupted by one or more openings (642) allowing interactions between conduit (624) and a surgically created environment proximate threadless friction fit surgical implant (620).
Among other things, rough surfaces (632) can include micropores, metal, abrasive particles, dense particles or clumps of particles.
When dictated by the surgically created cavity, first segment (636) is cylindrical and second segment (640) is conical.
When dictated by the surgically created cavity, first segment (636) is biconvex and the second segment (640) is conical. First segment (636) can be provided with a greater length than curved lengths of each opposed convex sides (644 a, 644 b). First segment (636) can also be ovoid.
When dictated by the surgically created cavity, first segment (636) is biconcave and second segment (640) is conical.
As shown in FIG. 11 , when dictated by the surgically created cavity, threadless friction fit surgical implant (620) can be provided with wings or bulges (670).
Select preferred embodiments of threadless friction fit surgical implant (620) shown in FIG. 9 can be provided with polyaxial head (100) connected to spheroid connector (102) that is attached to first side (648) of barrier (626) opposite the second segment (640). As shown, conduit (624) reciprocates with channel (104) of spheroid connector (102). Polyaxial head (100) includes receptacle (110) that snap fits/locks over spheroid connector (102). As shown in FIG. 15 , spheroid connector (102) can be offset of up to about 45 degrees from the longitudinal axis (X-X) of threadless friction fit surgical implant (620).
FIGS. 5-8 a are lateral perspectives of threadless friction fit surgical implant (650).
In a preferred embodiment, solid threadless friction fit surgical implant (650) has a longitudinal axis extending through the solid threadless friction fit surgical implant (650). Solid threadless friction fit surgical implant (650) can be provided with an uninterrupted exterior (652), first cylindrical section (654) with rough surfaces (632) and second section (656), adjacent to first cylindrical section (654), with more rough surfaces (632) than the first cylindrical section (654). First cylindrical section (654) includes a first diameter (660) merged with the second section (656).
Second section (656) is provided with first segment (662) proximate first cylindrical section (654). A portion of cross-sectional diameter (664) of first segment (662) is less than, equal to or greater than first diameter (660). Second segment (665) is merged and connected with first segment (662).
Among other things, rough surfaces (632) can include micropores, metal, abrasive particles, dense particles or clumps of particles.
When dictated by the surgically created cavity, first segment (662) is cylindrical and second segment (665) is conical.
When dictated by the surgically created cavity, first segment (662) is biconvex and second segment (665) is conical. First segment (662) can be provided with a greater length than curved lengths of each opposed convex side (672 a, 672 b). First segment (662) can also be ovoid.
When dictated by the surgically created cavity, first segment (662) is biconcave or concave.
As shown in FIG. 13 , when dictated by the surgically created cavity, threadless friction fit surgical implant (650) can be provided with wings or bulges (670).
Select preferred embodiments of threadless friction fit surgical implant (650) shown in FIG. 10 can be provided with polyaxial head (100) connected to spheroid connector (102) that is attached to first cylindrical section (654). Polyaxial head (100) includes receptacle (110) that snap fits/locks over spheroid connector (102). As shown in FIG. 16 , spheroid connector (102) can be offset of up to about 45 degrees from the longitudinal axis (X-X) of threadless friction fit surgical implant (650).
FIG. 17 is exemplary of a traditional state-of-the-art pedicle screw (666). The traditional pedicle screw (666) is threaded. Pedicle screws are generally of circular symmetry and a few have larger diameters near the head and smaller diameters near the tip. Few pedicle screws (666) are cannulated or fenestrated. Traditional pedicle screws (666) do not include blunt tips or angled deviations from their longitudinal axes for connection to devices distinct from traditional pedicle screws (666).
FIGS. 18 a-c show coronal slice views A, B and C of pedicles. Most pedicles are oblong or oval rather than round. The current friction fit surgical implant (620, 650, 690) is portrayed on the left side of FIGS. 18 a-c and a traditional pedicle screw (666) is portrayed on the right side of FIGS. 18 a-c . Within the current scope of the current invention, friction fit surgical implants (620, 650, 690) can be manufactured for implantation into round or oval pedicles.
FIG. 18 a is at the level of the transverse process and shows a threadless friction fit surgical implant (620, 650, 690) implanted into an opening of the pedicle. FIG. 18 b is a view of a mid-pedicle. FIG. 18 c is near the entrance to the vertebral body. In FIG. 18 a , threadless friction fit surgical implants (620, 650, 690) are oblong and include a bulge near the entrance of the pedicle. FIGS. 18 b-c portray an oblong dimension near the mid-pedicle and entrance to the vertebral body.
FIG. 19 is a lateral perspective of the threadless friction fit surgical implant (690) including an exploded view of polyaxial head (100) and spheroid connector (102). Threadless friction fit surgical implant (690) is provided with first region (616), second region (626 p), third region (636 p) and fourth region (646). Conduit (624) traverses first region (616), second region (626 p) and third region (636 p), and, in select preferred embodiments, can also traverse fourth region (646). First Region (616) can have a blunt tip (618) leading edge in front and connects posteriorly to second region (626 p). The threadless friction fit surgical implant (690) in second region (626 p) can have dimensions that maximize surface contact area with the geometric dimensions of the target zone. Second region (626 p) is connected to first region (616) and third region (636 p). Wings or bulges (670) can be incorporated into third region (636 p). When anatomic parameters require, bends or curves can be incorporated into fourth region (646). Threadless friction fit surgical implant (690) can be provided with one or more openings (642) allowing interactions between conduit (624) and the target zone or surgically created environment proximate threadless friction fit surgical implant (690). Depending on anatomic parameters, any combination of first region (616), second region (626 p), third region (636 p), fourth region (646) and conduit (624) can be provided with rough surfaces (632). Rough surfaces (632) can include micropores, metal, abrasive particles, dense particles or clumps of particles.
FIGS. 20 a-20 f show lateral perspectives of preferred embodiments of threadless friction fit surgical implant (690) for implantation into a patient. These preferred embodiments of threadless friction fit surgical implant (690) are provided with four distinct regions. First region (616) guides threadless friction fit surgical implant (690) into the target zone of the surgically created cavity. First Region (616) has a blunt tip (618) leading edge in front and connects posteriorly to second region (626 p). The respective heights and respective widths of threadless friction fit surgical implant (690) in first region (616) are less than any height or width in second region (626 p). The threadless friction fit surgical implant (690) in second region (626 p) can have dimensions that maximize surface contact area with the geometric dimensions of the target zone and the subcortical bone within a pedicle. Second region (626 p) is connected to first region (616) and third region (636 p). Third region (636 p) can correspond to the area in between the pedicle and the mammillary process. Wings or bulges (670) can be incorporated into third region (636 p). Bends or curves can be incorporated into fourth region (646). First region (616), second region (626 p) and third region (636 p) share a common midline (M-M). Fourth region (646) can share the common midline (M-M) or fourth region (646) can be provided with secondary midline (M1-M1) that is offset of up to about 45 degrees from the common midline (M-M). It is believed that offsetting the fourth region (646) can improve connections with some devices distinct from threadless friction fit surgical implant (690).
Threadless friction fit surgical implant (690) is provided with first region (616), second region (626 p), third region (636 p) and fourth region (646) where the regions (616, 626 p, 636 p, 646) are interconnected. Reference number (602) approximates the combined length of first region (616), second region (626 p) and third region (636 p).
A preferred embodiment of threadless friction fit surgical implant (690) includes conduit (624) adapted to carry one or more biocompatible substances. Conduit (624) traverses first region (616), second region (626 p) and third region (636 p). Barrier (626) also surrounds conduit (624). In select preferred embodiments, conduit (624) can traverse fourth region (646) and barrier (626) surrounds fourth region (646). First region (616) includes a blunt tip (618). Outward dimensions of first region (616) are nearer to the conduit (624) than outward dimensions of the second region (626 p) and third region (636 p). Third region (636 p) can be provided with one or more wings or bulges (637) incorporated with the barrier (626) where the wings (637) correspond to a target zone for implantation. Rough surfaces (632) can be applied to first region (616), second region (626 p) and third region (636 p). Threadless friction fit surgical implant (690) can be provided with one or more openings (642) allowing interactions between conduit (624) and the target zone or surgically created environment proximate threadless friction fit surgical implant (690). Fourth region (646), without rough surfaces (632), is connectable to a device distinct from threadless friction fit surgical implant (690). Rough surfaces (632) can include micropores, metal, abrasive particles, dense particles or clumps of particles. Polyaxial head (100) can be connected to fourth region (646). Fourth region (646) can be provided with secondary midline (M1-M1) that is offset of up to about 45 degrees from the common midline (M-M) of first region (616), second region (626 p) and third region (636 p). In select preferred embodiments, the fourth region (646) can include rough surfaces (632) and the first region (616), the second region (626 p) and the third region (636 p) have more of the rough surfaces (632) than the fourth region (646).
Another preferred embodiment of threadless friction fit surgical implant (690) includes an uninterrupted exterior (692). First region (616) includes a blunt tip (618). Outward dimensions of first region (616) are nearer to the conduit (624) than outward dimensions of the second region (626 p) and third region (636 p). Third region (636 p) can be provided with one or more wings or bulges (637) uninterrupted exterior (692) where the wings (637) correspond to a target zone for implantation. Rough surfaces (632) can be applied to first region (616), second region (626 p) and third region (636 p). Fourth region (646), without rough surfaces (632), is connectable to a device distinct from threadless friction fit surgical implant (690). Rough surfaces (632) care created by either additive or subtractive means or a combination thereof and can include micropores, metal, abrasive particles, dense particles or clumps of particles. Polyaxial head (100) can be connected to fourth region (646). Fourth region (646) can be provided with secondary midline (M1-M1) that is offset of up to about 45 degrees from the common midline (M-M) of first region (616), second region (626 p) and third region (636 p). In select preferred embodiments, the fourth region (646) can include rough surfaces (632) and the first region (616), the second region (626 p) and the third region (636 p) have more rough surfaces (632) than the fourth region (646).
FIGS. 21 a-21 f show lateral perspectives of preferred embodiments of threadless friction fit surgical implant (690) shown in FIGS. 20 a-20 f that also include rough surfaces (632).
FIGS. 21 g-21 i are illustrative of types of three-dimensional bulges (670) attachable to surgical implant (620, 650, 690).
Applicant has enabled, described and disclosed the invention as required by Title 35 of the United States Code.

Claims

What is claimed is:

1) A threadless friction fit surgical implant comprising a cannula; the cannula comprising:

a) a conduit adapted to carry one or more biocompatible substances; the conduit traversing an entire length of a longitudinal axis of the cannula;

b) a barrier surrounding the conduit comprising a first cylindrical section without rough surfaces and a second section, adjacent to the first cylindrical section, with the rough surfaces; the first cylindrical section including a first diameter merged with the second section; and

c) the second section comprising:

i) a first segment proximate the first cylindrical section, wherein a portion of a cross-sectional diameter of the first segment is less than, equal to or greater than the first diameter;

ii) a second segment merged and connected with the first segment; and

iii) the second segment interrupted by one or more openings allowing interactions between the conduit and a surgically created environment proximate the threadless friction fit surgical implant.

2) The threadless friction fit surgical implant of claim 1, wherein the rough surfaces are created by additive or subtractive techniques or a combination of additive and subtractive techniques.

3) The threadless friction fit surgical implant of claim 2, wherein:

a) the first segment is cylindrical and the second segment is conical; or

b) the first segment is biconvex and the second segment is conical; or

c) the first segment includes a greater length than curved lengths of each opposed convex sides; or

d) the second segment is longer than the first segment; or

e) the first segment is biconcave and the second segment is conical; or

f) the first segment is ovoid.

4) The threadless friction fit surgical implant of claim 3, wherein the conduit comprises rough surfaces.

5) The threadless friction fit surgical implant of claim 4 comprising: a polyaxial head (100) connected to a first side of the barrier opposite the second segment.

6) The threadless friction fit surgical implant of claim 5, wherein the second section comprises one or more wings.

7) The threadless friction fit surgical implant of claim 6, wherein a spheroid connector for polyaxial head is offset from the longitudinal axis the cannula.

8) The threadless friction fit surgical implant of claim 3, wherein the first cylindrical section comprises the rough surfaces and the second section comprises more of the rough surfaces than the first cylindrical section.

9) A solid threadless friction fit surgical implant comprising:

a) a longitudinal axis extending through the solid threadless friction fit surgical implant; the solid threadless friction fit surgical implant comprising an uninterrupted exterior; a first cylindrical section without rough surfaces and a second section, adjacent to the first cylindrical section, with the rough surfaces; the first cylindrical section including a first diameter merged with the second section; and

b) the second section comprising:

i) a first segment proximate the first cylindrical section, wherein a portion of a cross-sectional diameter of the first segment is less than, equal to or greater than the first diameter; and

ii) a second segment merged and connected with the first segment.

10) The threadless friction fit surgical implant of claim 9, wherein the rough surfaces are created by additive or subtractive techniques or a combination of additive and subtractive techniques.

11) The threadless friction fit surgical implant of claim 10, wherein:

a) the first segment is cylindrical and the second segment is conical; or

b) the first segment is biconvex and the second segment is conical; or

d) the second segment is longer than the first segment; or

e) the first segment is biconcave and the second segment is conical; or

f) the first segment is ovoid.

12) The threadless friction fit surgical implant of claim 11 comprising: a polyaxial head connected to a first side of the surgical implant.

13) The threadless friction fit surgical implant of claim 12, wherein the second section comprises one or more wings.

14) The threadless friction fit surgical implant of claim 13, wherein a spheroid connector for polyaxial head is offset from the longitudinal axis the surgical implant.

15) The threadless friction fit surgical implant of claim 11, wherein the first cylindrical section comprises rough surfaces and the second section comprises more rough surfaces than the first cylindrical section.

16) A threadless friction fit surgical implant comprising a first region, a second region, a third region and a fourth region; the regions being interconnected; the threadless friction fit surgical implant comprising:

a) a conduit adapted to carry one or more biocompatible substances; the conduit traversing the first region, the second region and the third region and a barrier surrounding the conduit;

b) the first region comprising a blunt tip, wherein outward dimensions of the first region are nearer to the conduit than outward dimensions of the second region and the third region;

c) the third region comprising one or more wings or bulges incorporated with the barrier; the wings or bulges corresponding to a target zone for implantation;

d) the first region, the second region and the third region comprising rough surfaces and one or more openings allowing interactions between the conduit and a surgically created environment proximate the threadless friction fit surgical implant; and

e) the fourth region, without rough surfaces, connectable to a device distinct from the threadless friction fit surgical implant.

17) The threadless friction fit surgical implant of claim 16, wherein the rough surfaces are created by additive or subtractive techniques or a combination of additive and subtractive techniques.

18) The threadless friction fit surgical implant of claim 17, wherein the conduit comprises rough surfaces.

19) The threadless friction fit surgical implant of claim 17 comprising: a polyaxial head connected to the fourth region.

20) The threadless friction fit surgical implant of claim 19, wherein the fourth region comprises a secondary midline (M1-M1) offset of up to about 45 degrees from the common midline (M-M) of the first region, the second region and the third region.

21) The threadless friction fit surgical implant of claim 19, wherein the fourth region comprises layers of the rough surfaces and the first region, the second region and the third region comprise more layers of the rough surfaces than the fourth region.

22) A threadless friction fit surgical implant comprising a first region, a second region, a third region and a fourth region; the regions being interconnected with an uninterrupted exterior; the threadless friction fit surgical implant comprising:

a) the first region comprising a blunt tip, wherein outward dimensions the first region are nearer to the longitudinal axis of the threadless friction fit surgical implant than outward dimensions of the second region and the third region;

b) the third region comprising one or more wings or bulges incorporated into the uninterrupted exterior; one or more wings or bulges corresponding to a target zone for implantation;

c) the first region, the second region and the third region comprising rough surfaces; and

d) the fourth region, without rough surfaces, connectable to a device distinct from threadless friction fit surgical implant.

23) The threadless friction fit surgical implant of claim 22, wherein the rough surfaces are created by additive or subtractive techniques or a combination of additive and subtractive techniques.

24) The threadless friction fit surgical implant of claim 23 comprising: a polyaxial head connected to the fourth region.

25) The threadless friction fit surgical implant of claim 24, wherein the fourth region comprises a secondary midline (M1-M1) offset of up to about 45 degrees from the common midline (M-M) of the first region, the second region and the third region.

26) The threadless friction fit surgical implant of claim 24, wherein the fourth region comprises the rough surfaces and the first region, the second region and the third region comprise more of the rough surfaces than the fourth region.