KR20010053276A - Dental implant component - Google Patents

Abstract

The present invention provides a dental prosthesis 30 or 40 or a core portion thereof, wherein the prosthesis 30 has a proximal end 2, a proximal end 6 and a channel 7 extending from the proximal opening 9 in the proximal end to the distal end. 10, wherein the artificial root element is distal to a predetermined zone 18 that is to be removed to provide a distal opening in the channel of a predetermined dimension to allow the post 50 to be placed in the channel during manufacture of the dental prosthesis or core portion thereof. In which the roof wall structure 5 is provided and a tight fit is formed between the post and the end opening.

Description

Artificial root element {DENTAL IMPLANT COMPONENT}

Such artificial root elements are usually referred to in the art as "cylinders", but this term specifically refers to the present invention as it refers to circular cross-sections of certain diameters of elements that are not essential features for the purposes of the present invention. Not used for

A dental prosthesis is one of the components that make up a dental graft, a structure that is secured to the bone (mandible or mandible) of a patient's jaw to replace one or more missing original teeth. The dental graft tissue includes a dental prosthesis support structure secured to the jawbone of a patient wholly or partially free of teeth to support the dental prosthesis. Dental prosthesis support structures are usually used in the case of dental implants in which the jaw or large jaw bone tissue is used, depending on whether a single fixture is used for one tooth replacement or one or more multiple fixtures are usually used for some missing tooth replacements. To the transmucosal member (butting) of each fixture connected to the coronal end of the fixture to connect one or more anchoring members (fixes) implanted therein and the soft tissue layer (gum) of the jaw overlying the fixture site. Is formed by. The structure providing one or more artificial replacement teeth, the dental prosthesis is then connected to the tubular end of the abutment, for example a single tooth replacement crown or a bridge for replacement of some missing natural teeth.

In order to ensure that the dental prosthesis fits into a state that exhibits an effect in the oral cavity, for example, natural teeth still remain in the jawbone or large jaw, and the dental prosthesis is manufactured on a model filled with tartar of the jaw originally prepared in a known manner. One or more similar elements are usually integrated in the model and a number corresponding to the number of fixtures is implanted into the bone tissue. Each similar element has an end portion similar to the tubular end provided by the dental prosthesis support structure, for example the respective tubular member of the abutment. Each similar element is integrated into the model such that the similar end accurately reproduces the position and orientation that the tubular end of the associated tubular member of the dental prosthesis support structure will have or will have within the jaw.

A cylinder having a tip or top end that complements the tubular end of the tubular member of the dental prosthesis support structure is then seated on the similar end of each similar element. A dental prosthesis that fits into a condition that exhibits an effect in the oral cavity is then produced on a cylinder or cylinders, after which the dental prosthesis is moved to a dental prosthesis support structure for fixation to the jawbone.

The manner in which a dental prosthesis is made on a cylinder depends on whether one tooth is to be replaced or several teeth are replaced and whether the prosthesis is a permanent or temporary prosthesis while the permanent prosthesis is being manufactured.

Permanent dental prostheses usually apply a wax pattern on a cylinder, and an assembly of cylinder wax patterns is placed in the mold and surrounded by coating material and a lost wax into which the precious or semi-precious metal, such as gold, is injected into the mold to replace the wax pattern ( It is formed by forming a casting structure on a cylinder having the same profile as a wax pattern by a lost-wax casting process. In this regard, the cylinder may be formed, in whole or in part, of a combustion material, for example a plastic such as polystyrene, in which case the combustion material is also replaced by precious or semi-precious metals. However, the use of the cladding material provides surface features at the top or tip of the cylinder, for example polygonal surfaces that allow the cylinder to be indexed to the tubular end of the tubular member of the dental prosthesis support structure. If so, it is guaranteed to remain in the casting structure.

Thus, a permanent single dental prosthesis usually includes an inner cast skeleton based on, or based on, a cylinder connectable to the tubular end of the tubular member of the dental prosthesis support structure, for example abutting contact, and a magnetic layer shining on the inner skeleton. The wax pattern may or may not be in a form in which the magnetic layer provides a toothed internal skeleton shining thereon.

In the case where some natural teeth are permanently replaced, the dental prosthesis usually includes a tubular member of the dental prosthetic support structure, for example several cylinders connectable to the abutment, or a cylinder-based internal casting skeleton and an internal casting skeleton. It includes a range of artificial teeth (dentures) mounted on. In this case, the wax pattern usually splints the cylinder on a similar object in the model and dentures are mounted on the dental prosthesis support structure to form a cast skeleton that can connect between the spaced tubular members of the dental prosthesis support structure. It will be mounted on the casting before or after it. Alternatively, the dental prosthesis may be formed by applying a separate wax pattern to each cylinder to form each casting that is then mounted to the tubular member of the dental prosthesis support structure, wherein the denture is then mounted onto the casting.

For an overview of the formation of permanent dental prostheses, see chapters 4 and 5 of the Dental Transplant Organisation: General Practitioner's Guide, especially by Michael Norton and published by Quintersons in 1995.

The use of temporary dental prostheses is well known and the environment in which temporary dental prostheses are needed is provided in US Pat. No. 5,259,759 (Jorneus et al./Nobelpharma AB). In the case of a temporary single tooth dental prosthesis, the usual procedure is to apply acrylic resin to the outer surface of the cylinder when mounted on a similar end in the model, to mold the acrylic resin and then to cure the acrylic resin on the cylinder Molding.

Practices in the art include the tip or top end of the cylinder in the form of a sleeve, i.e., the similar end of the tracheal organ, the tubular end of the associated tubular member of the dental prosthesis support structure, and the distal end and tip within the tip. And an open end channel extending from the closest opening to the furthest opening in the distal end. Such cylinders are described in U.S. Pat. (Marlin), US Pat. No. 5,180,303 (Hornberg et al. / Council of California State University) and US Pat. No. 5,234,339 (Grigereit / Cooler, Inc.). In some of these US patents the cylinder is fixed directly to the fixture, ie the need for abutment in the dental prosthesis support structure is eliminated.

By using a sleeve cylinder in the formation of a dental prosthesis, for example a bridge, for replacement of a number of missing teeth, an inner mold skeleton with a through open end channel can be formed. In the case of a dual configuration bridge (shown in Chapter 5 of the Dental Implant Tissue: General Practitioner's Guide above), these channels act as access passages through which the screws penetrate and the internal mold skeleton into the dental prosthesis support structure. Fix it. The denture is then bonded to the inner mold skeleton held in screws to the dental prosthesis support structure. In a normal bridge, the access passage can communicate with an access passage formed in the denture when the denture is bonded to the inner mold skeleton. The bonded assembly may then be screwed to the dental prosthesis support structure through the communication access passageway.

In the case of a dental prosthesis of a single tooth, for example a crown, the use of a sleeve cylinder allows the dental prosthesis to be joined to the tubular member of the dental prosthesis support structure without mouth and the joined assembly is then as discussed more fully thereafter. It is added to the normal structure of the dental prosthesis support structure fixed to the jaw or the mandibular canal.

In the case of permanent dental prosthesis, the trailing end of the post protrudes to a higher height than the wax pattern is formed from the distal opening in the cylinder, and the post is located on the superior organ in the model in an operating position that forms a close fit with the distal opening in the cylinder. As it is mounted on, it forms an access passage as a result of the post being inserted into each cylinder. The wax pattern is then formed around the post so that the passage remains in the wax pattern in communication with the channel in the cylinder by removing the post after the wax pattern is completed. These channels in the wax pattern are regenerated in the casting. The tight fit of the post with the distal opening of the cylinder acts to prevent wax from leaking into the cylinder before casting and otherwise makes it difficult to properly secure the prosthesis onto the dental prosthesis support structure. Usually the insertion end of the post is threaded and engages the internal thread of the socket in the upper end of the superior tracheal structure, which may or may not be a duplicate of the internal thread of the socket opening at the tubular end of the dental prosthesis support structure in the operating position. do.

The post is also used in a similar form when the sleeve cylinder is used to form a temporary dental prosthesis. In one example, to form a temporary single tooth dental prosthesis, the tip of the cylinder is coupled to the top end of the superior tracheal structure in the patient's model, which is partially toothless, and the post has a posterior end of the post with acrylic teeth from the distal opening in the cylinder. It protrudes to a higher height than formed and the post is inserted into the cylinder into an operating position that forms a close fit with the distal opening in the cylinder. The acrylic resin is then applied to the outer surface of the cylinder, shaped into natural teeth that fit into the surrounding teeth in the model and then cured. The close fit between the post and the distal opening of the cylinder serves to prevent the acrylic resin from leaking into the cylinder before curing and otherwise makes it difficult to properly secure the prosthesis onto the dental prosthesis support structure. The post forms an channel in the cured acrylic tooth in communication with the channel in the cylinder or, for example, an open-ended channel through a temporary single tooth dental prosthesis formed therethrough to allow the screw to pass through to retain the prosthesis in the dental prosthesis support structure. It acts to form.

To illustrate the fact that the use of the above sleeve cylinder allows a single tooth dental prosthesis to be specifically connected through the mouth to a tubular member of the dental prosthesis support structure, a case of securing a temporary single tooth dental prosthesis to the dental prosthesis support structure It is contemplated that the tubular member may be provided within the sleeve to secure the abutment sleeve to the fixture via a sleeve seated on the tubular end of the fixture in which the internal threaded socket is present and a head of a screw that bears on a shoulder in the lumen of the abutment sleeve. A conventional abutment comprising a threaded portion inserted through the lumen and screwed into an internal threaded socket in the tubular end of the fixture. The open end channel formed in the temporary single tooth dental prosthesis by the post allows the sleeve cylinder substructure of the temporary single tooth dental prosthesis to be joined without a mouth to the abutment sleeve and the assembly so formed is on the tubular end of the fixture. And the abutment screw is then inserted through the prosthetic abutment sleeve assembly for engagement in the internal threaded socket in the fixture. The channel in the prosthesis is then filled.

In the description of the non-mouth connection above, the abutment sleeve can be releasably disposed in the model instead of its superior engine so that the cylinder can be placed on the abutment sleeve during the manufacture of the prosthesis. More generally, there are other hypothetical cases in which the tubular members of the dental prosthesis support structure are incorporated into the model for engagement use with the cylinder before being secured to the jawbone.

Another type of prior art cylinder corresponds to the sleeve cylinder except that the roof wall structure is provided across the end opening. With this type of cylinder, a dental prosthesis is formed that does not have an access passage therein and requires an intramouth connection to the support structure. In one example, when forming a temporary single tooth dental prosthesis, the post cannot be used when acrylic resin is applied and as a result no access channel is formed in the prosthesis. Thus, when the temporary prosthesis formed with this type of cylinder is joined to the abutment of the two pieces described above, the joining step is performed by the abutment sleeve being screwed to the fixture by the abutment screw before the prosthesis is joined to the abutment sleeve. It occurs inside the mouth when it needs to be maintained.

The problem with the cylinders proposed so far is that the practitioner places limitations on how the dental prosthesis can be coupled to the dental prosthesis support structure. The present invention is directed to improving this condition.

The present invention relates to an artificial root element intended for use in manufacturing a dental prosthesis or core portion thereof.

1 is a side view of an artificial root element in accordance with the present invention;

2 is a side cross-sectional view of an artificial tooth root element.

3 is a perspective view from below of the artificial root element;

4 is a bottom view of the artificial tooth root element.

5 is a perspective view from above of the artificial root element;

6 is a plan view of an artificial tooth root element.

7 is a schematic side cross-sectional view of a dental prosthesis of a first temporary single tooth formed through the use of an artificial tooth root element.

8 is a schematic side view of a dental prosthesis of a first temporary single tooth in the process of being mounted inside the mouth on the abutment sleeve.

9 is a side view showing a predominantly cross-section of a dental prosthesis of a second temporary single tooth formed through the use of an artificial tooth root element.

Figure 10 is a side view of the dental prosthesis of the second temporary single tooth in the process of being mounted through the mouth on the abutment sleeve.

FIG. 11 is a schematic side view of a dental prosthesis-butt sleeve of a second temporary single tooth in the process of being secured into the mouth with abutment sleeve.

According to a first aspect of the present invention, there is provided an artificial root element, wherein the dental prosthesis or core portion thereof is manufactured to have a proximal end, a distal end, and a channel extending from the distal opening in the distal end to the distal end, the artificial root element being a dental prosthesis or A roof wall structure is provided at the distal end of the predetermined zone which is to be removed to provide a terminal opening in the channel of a predetermined dimension for the post to be placed in the channel during fabrication of the core portion and a tight fit is formed between the post and the terminal opening It is characterized by.

An advantage of the artificial root element of the present invention is that it provides the practitioner with the ability to determine whether to form a terminal opening and the option of how the dental prosthesis is formed and attached to the dental prosthesis support structure for fixation to the jawbone.

The artificial root element may be formed from a metal, such as titanium or gold, or a plastic material, such as capable of burning during coating or lost wax casting. At the last point the artificial root element according to the invention does not necessarily form part of the dental prosthesis or a core part made thereon since the combustion material is replaced by casting if the dental prosthesis or core part is formed by lost wax casting.

In embodiments of the invention described hereinafter, the artificial root element is a fragment element.

In embodiments of the present invention described hereinafter, certain areas of the roof wall structure are certain portions of the roof wall structure.

Certain zones can be removed by fabricating certain zones with reduced wall thickness. This can be achieved by facilitating the grinding of certain areas and by making recessed areas of certain areas of the roof wall structure. The recess zone can be formed by providing a recess in the leading end surface of the roof wall structure. The boundaries of the recesses on the tip surfaces can be highlighted on the end faces of the roof wall structure by boundary markings, for example grooved tracks, to ensure precise removal of the roof wall structure. Of course, the use of the marking on the end face of the roof wall structure to delimit a predetermined zone is not limited to the case where the recess is provided on the tip face of the roof wall structure.

In an embodiment of the present invention described later, certain areas of the roof wall structure may be removed to provide a pilot end opening in a channel having a dimension smaller than the predetermined dimension, and a peripheral portion of the pilot end opening. It consists of a second auxiliary zone juxtaposed to the first auxiliary zone which is to be removed by grinding the edges so that the pilot end openings extend into the end openings of the predetermined dimensions.

In embodiments of the present invention described hereinafter, certain areas of the roof wall structure are comprised of transverse bases and distal extension protrusions on bases through which channels extend therein to form cavities in protrusions of dimensions smaller than the predetermined dimensions. Removing the protrusion or distal end to expose it provides a pilot distal opening in the channel.

In an embodiment of the present invention, a predetermined area of the roof wall structure is provided by a distal extension protrusion that extends into the channel to form a cavity in the protrusion of the predetermined dimension, thereby removing the protrusion or its distal end to expose the cavity. Provide a terminal opening in the channel of the.

It may be useful for the outer surface of the artificial root element to have a surface structure for inhibiting tip-end motion of the dental prosthesis or core portion built thereon. With this in mind, the protrusions can provide transversely extending flanges at their distal ends.

In an embodiment of the invention, the predetermined area of the roof wall structure is a releasably fixable part of the element.

According to a second aspect of the invention, the artificial root element in accordance with the first aspect of the invention and a post such that the post is to be inserted into the channel of the artificial root element through the distal opening to an operating position that forms a tight fit with the distal opening. Provided is an artificial tooth root device comprising a.

According to a third aspect of the present invention, an artificial tooth root having a proximal end engaging with a tubular end of a dental prosthesis support structure and a distal end covered by the roof wall structure and a first channel extending from the proximal opening in the proximal end to the roof wall structure Forming a dental prosthesis mounted on the tubular end of the dental prosthesis support structure comprising providing an element, and distal opening in the first channel through a roof wall structure of sufficient size to allow the post to be inserted into the first channel. Providing, positioning the post in the first channel such that the post protrudes from the distal opening, and protruding post as a protruding post used to form an open end second channel in a denture providing structure in communication with the first channel. By making a denture providing structure on the element or in which the open end second channel is in communication with the first channel. The post protrusion as is used to form a fisherman in a method consisting of the steps of: providing on a portion of the artificial and forming a dental prosthesis produced by the dental prosthesis core portion on the root element, provides denture structure core is provided.

Preferably, in the method according to the invention a terminal opening of a dimension is provided which creates a close fit with the post when inserted into the channel, in which case the artificial root element and the post used in this method are provided in the second aspect of the invention. According to the artificial root device.

The method of the present invention can be used to replace one tooth, in which case the denture providing structure provides one denture. In this case, the denture providing structure of the artificial root element can be a cured acrylic resin denture on the artificial root element or a magnetic layer applied to the core portion of a dental prosthesis fabricated on the artificial root element.

The method of the invention can also be used for the replacement of a number of missing natural teeth, in which case the denture providing structure provides a corresponding number of dentures. In this case, one or more artificial root elements may be needed for use. Usually, a core portion is then formed on each artificial tooth root element connected in series to form a bridge structure in which a denture providing structure can be provided thereon. Meanwhile, the core parts may be formed independently of each other. The denture providing structure may be a denture that is secureable to the core portion within or through the mouth.

In an embodiment of the method according to the invention, an open end third channel is provided in the denture providing structure in communication with the second channel in the core portion. This has particular application in the formation of ordinary bridges for the reasons outlined above.

Embodiments of the present invention will now be described with reference to the accompanying drawings by way of example.

1 to 6 show an artificial tooth root element 10 in which a dental prosthesis or its core portion is made in accordance with the present invention. The artificial root element 10 has a tip 2 and a tip 6 and includes a side wall 3 extending from the tip 2 of the body 1 to the roof wall 5 at the tip 6. It is provided with a metal, for example titanium or plastic body 1, which is formed by a peripheral wall structure. The inner surface of the peripheral wall structure is bounded by a channel or cavity 7 in the body 1 with a tip opening 9 in the tip end 2.

As shown in FIGS. 2-4, the inner surface of the side wall portion 3 at the tip opening 9 forms an octagonal cross section 11 for opposite rotational engagement and within the jawbone as described in more detail below. It is indexed to a complementary octagonal cross section on the tubular end of the sleeve portion of the abutment to be fixed or secured to the implanted fixture. As will be appreciated by those skilled in the art, other complementary forms for the opposite rotational engagement of the body 1 to the abutment sleeve can easily be adopted.

The outer surface of the sidewall portion 3 adjacent to the tip opening 9 may also have an annular shoulder 4 for supporting a denture formed from a dental prosthesis, for example an acrylic resin, or a core of the dental prosthesis, as described in more detail below. In part, for example, a mold inner skeleton formed by the lost wax process is formed.

The roof wall portion 5 of the body 1 of the artificial root element 10 has a base 12 and a protrusion 13 comprising an axial portion 15 and a transversely extending flange portion 17. As shown in FIG. 2, the interior or tip surface of the base 12 has a recess 18 over the area and the protrusion 13 over the exterior or end surface of the base 12 of the roof wall 5. It has a central channel 8 formed therein extending.

Referring now to FIGS. 2, 5 and 6, the track 19 with an annular V-shaped groove is formed with the peripheral edge 21 of the recess 18 in the inner surface of the base 12 of the roof wall 5. It is provided in the outer surface of the roof wall portion 5 to be joined.

The artificial root element 10 provides the practitioner with two different ways to fabricate a dental prosthesis or core portion as described below with reference to FIGS. 7-11 where common elements are labeled with common reference numerals. . 7-11 show sleeves of abutments to be held or screwed by abutment screws 36 at the tubular end of the fixture 38 implanted in the patient's partially toothless jaw bone where the natural tooth is missing. The fabrication of the acrylic denture 32 on the body 1 to form a temporary single tooth dental prosthesis 30, 40 mounted on the tubular end of the part 34.

The tubular end of the abutting sleeve 34 is a superior structure 42 having an end 44 that is a superior organ or a replica of the tubular end of the abutting sleeve 34, referred to as a “butting superior organ” or a “butting replica”. The preparation of a partially toothless jaw model of a patient whose body is integrated to accurately reproduce the placement and orientation that will be adopted or adopted in the jawbone relative to the surrounding dentition is common to both methods.

In the simpler first method shown in FIGS. 7 and 8, the body 1 is mounted on the top end 44 of the abutting firm engine 42 and the acrylic resin comprises a roof wall 5. It is applied on the surface of 1) and an acrylic resin is supported on the shoulder 4. The acrylic resin is molded into a naturally visible tooth 32 that fits the shape on the model of the patient's current dentition adjacent to the fixture location and then hardened by curing. The transversely extending flange 17 acts to block the axial displacement of the acrylic tooth 32 with respect to the body 1 and the anti-rotation locking of the acrylic tooth 32 on the body is provided on the outer surface of the body 1. The degree of roughness can be achieved, for example, through pitting caused by blasting of the outer surface.

With reference to FIG. 8, before the prosthesis 30 is secured to the abutment sleeve 34, the abutment sleeve 34 is mounted to the fixture 38 and its threaded shank is an internal thread in the tubular end of the fixture 38. The head of the screw to be held by the abutment screw 36 (not shown) through the abutment sleeve 34 for screwing into the socket and to lock the abutment sleeve 34 to the fixture 38. Against the inner surface in the abutment sleeve 34. The prosthesis 30 is then joined by an abutment sleeve 34 inside the mouth and the octagonal cross-sectional shape 11 at the tip opening 9 in the body 1 of the artificial root element 10 is abutment sleeve ( And a complementary octagonal cross-sectional shape 33 on the abutment sleeve 34 to lock the prosthesis 30 against rotation on the 34. The mating octagonal cross section also acts as indexing means to ensure the correct orientation of the prosthesis 30 in the jaw.

Referring now to FIGS. 9-11, the distal opening of the channel 7 in the second method removes the transversely extending flange 17 and exposes the shaft portion 15 of the protrusion 13 to expose the central channel 8. It is formed in the roof wall part 5 of the main body 1 by first cutting through it. Base 12 is then ground radially outward of annular grooved track 19. In this regard, the central channel 8 provides an access passage for the grinder to gain access to the exposed edge of the base 12 and the grinding of the base 12 reduces the wall thickness of the base 12. This is facilitated by the recesses 18 in the inner surface of 5). The annular grooved track 19 acts to define the boundary at which the grinding ends, i.e., forms the cross-sectional area of the distal opening that is created in the distal end of the body 1, and the reason is simply understood.

As shown in Fig. 9, after the distal opening is formed in the roof wall portion 5, the main body 1 is mounted on the abutting upper engine 42. The threaded post 50 is then inserted into an internal threaded socket 54 in the upper end 44 of the abutting firm trachea 42 via an open end channel in the body 1 created by the formation of a terminal opening. do. The cross-sectional area of the distal opening in the body 1 is adapted to form a tight fit with the post 50. The acrylic tooth 32 is then formed on the body 1 around the post 50 and the resulting prosthesis 40 has an axially extending open end channel 56 as shown in FIG. 10. An advantage of the prosthesis 40 with open end channel 56 is that the prosthesis 40 can be bonded to the abutment sleeve 34 without passing through the mouth, as can be seen from FIG.

As can also be seen from FIG. 11, the bonded prosthesis-butting sleeve assemblies 40, 34 are then mounted to the tubular ends of the fixture 38 and the abutment screws 36 secure the assembly after the channel is filled. 38) to pass through the assembly.

When the abutment sleeve 34 is bonded to the dental prosthesis 40 without passing through the mouth, it is possible for the abutment sleeve 34 to be releasably incorporated into the model instead of the superior trachea 42 to further aid in the manufacturing process. It does not require the use of the element.

The advantage of forming a terminal opening in the channel 7 of the artificial root element 10 so that a tight fit is formed in the post 50 is that the channel 7 during the preparation of the acrylic tooth 32 to at least a significant amount of acrylic resin. Leakage to the inside is prevented (i) affecting the surface profile at the tip 2 of the main body 1, making it difficult for the prosthesis 40 to properly seat on the abutment sleeve 34, and (ii ) Blocking the channel 7 making it difficult for the abutment screw 36 to be inserted into the fixture 38.

As can be seen, the artificial root element 10 according to the present invention provides two different methods for forming a temporary single tooth dental prosthesis 30, 40 and ancillary prosthesis 30, 40 to the jawbone. There are two different ways to fix it.

The invention has been described with reference to exemplary embodiments and it will be appreciated that the scope of the invention may be varied in many different ways within the scope of the appended claims. In one example, although the use of an artificial root element in accordance with the present invention has been described with reference to the fabrication of a temporary single tooth dental prosthesis, the present invention is also applicable to those skilled in the art and to the formation of a number of permanent single tooth dental prostheses and It will be appreciated that you will have dental prostheses, for example bridge applications, for the replacement of natural teeth.

Finally, inclusion in the appended claims of reference numerals used in the accompanying drawings is for the purpose of description and should not be construed as limiting the effect on the scope of the claims.

Claims (20)

Dental prosthesis 30, 40, or a core portion thereof, wherein the core portion has a proximal end 2, a distal end 6, and a channel 7 extending from the distal opening 9 in the distal end to the distal end 10. To The prosthetic root element has a roof wall structure 5 at the distal end of the predetermined zone 18 that is removed to provide a distal opening in the channel of predetermined dimensions to allow the post 50 to be placed in the channel during manufacture of the dental prosthesis or core portion thereof. And an intimate fit is formed between the post and the distal opening. The artificial root element of claim 1, wherein the predetermined region of the roof wall structure is a portion of the roof wall structure. 3. The artificial root element of claim 2, wherein the predetermined zone is reduced in wall thickness. 4. The artificial root element according to claim 3, wherein the predetermined zone of the roof wall structure is a recess zone (18) of the roof wall structure. 5. The artificial root element according to claim 4, wherein the recess zone of the roof wall structure is formed by providing a recess (18) on the leading surface of the roof wall structure. 6. The artificial root element according to claim 2, wherein the predetermined area of the roof wall structure is delimited by a boundary marking (19) on the distal face of the roof wall structure. 7. 7. The artificial root element according to claim 6, wherein the boundary marking is in the form of a grooved track (19). The method of claim 1, wherein the predetermined zone of the roof wall structure is removed by grinding a peripheral edge of the pilot end opening and a first auxiliary zone that is removed to provide a pilot end opening in a channel having a dimension smaller than the predetermined dimension. And a second auxiliary zone juxtaposed to the first auxiliary zone being formed, wherein the pilot distal opening extends into the distal opening of the predetermined dimension. The area of the roof wall structure according to claim 8, wherein the predetermined area of the roof wall structure is a transverse base (12) and a terminal extension protrusion (13) on the base on which the channel extends therein to form a cavity (8) in the projection of a dimension smaller than the predetermined dimension. And provide a pilot distal opening in the channel by removing the protrusion or distal end thereof to expose the cavity. 6. The cavity according to claim 1, wherein a predetermined area of the roof wall structure is provided by a terminal extension protrusion 13, in which the channel extends therein, to form a cavity 8 in a protrusion of a predetermined dimension. Providing a distal opening in the channel of a predetermined dimension by removing the distal end or distal end thereof to expose the distal end. The artificial root element according to any one of the preceding claims, characterized in that the outer surface of the artificial root element has a surface structure (17) for inhibiting the tip-end movement of the dental prosthesis or core portion fabricated thereon. The projection according to claim 9 or 10, characterized in that the projection provides a transversely extending flange (17) at its distal end to inhibit the tip-end movement of the dental prosthesis or core portion fabricated thereon. Artificial root element. 3. An artificial root element according to claim 1 or 2, wherein the predetermined area of the roof wall structure is a releasably fixable part of the element. The artificial root element 10 according to any one of the preceding claims and the post being inserted into the channel 7 of the artificial root element through the end opening into an operating position that forms a tight fit with the end opening. Artificial root device comprising a post (50). In the method of forming the dental prosthesis 30, 40 mounted on the tubular end 33 of the dental prosthesis support structure 34, (A) a first channel extending from the distal end 6 covered by the coronary coronary of the dental prosthesis support structure and the distal end 6 covered by the roof wall structure 5 and the distal opening 9 in the distal end to the roof wall structure; Providing an artificial root element 10 having (7), (B) providing a post 50, (C) providing a terminal opening in the first channel through a roof wall structure of sufficient size to allow the post to be inserted into the first channel; (D) positioning the post in the first channel such that the post protrudes from the distal opening; (E) by making the denture providing structure on the artificial root element as a protruding post used so that the open end second channel is formed in the denture providing structure in communication with the first channel, or the open end second channel being the first channel. Forming a dental prosthesis by making a core portion of the dental prosthesis on the artificial root element and providing a denture providing structure on the core portion as a protruding post used to form in the core portion in communication with the core portion. 16. The method of claim 15 including providing a distal opening of the dimension that, when inserted into the channel, creates a tight fit with the post. The method of claim 16 wherein the artificial root element and the post are artificial root devices according to claim 14. 18. The method according to any one of claims 15 to 17, wherein an open end third channel is provided in the denture providing structure in communication with the second channel in the core portion. Dental prosthesis or its core portion is to be manufactured as described and illustrated with reference to the accompanying drawings herein. A method of forming a dental prosthesis as described and illustrated with reference to the accompanying drawings herein.