MXPA98002811A - Provision of connection between an implant and a sopo - Google Patents

Abstract

The present invention relates to a connection arrangement between an implant, mainly a dental implant, and a support to be fixed on the implant, wherein a) the implant has a head portion and a shaft portion extending downwards, b) in the head portion there is a main hole which ends in the manner of a blind hole in the lower part of the hole, from which extends a threaded hole running downwards, axially with an internal thread c) the conically contoured main perforation, as a result of which an enlarged inner cone is obtained upwards, d) the implant terminates at the top with an implant flange which may be tapered upwards, c) the support has a portion of upper neck and a portion of lower root, the first protrudes from the implant and the last one is coupled with the inner cone, f) a clamping screw is provided which connects the support the implant and whose head is housed in the holder, while the threaded segment engages with the threaded hole, g) the support has an entry that begins at the bottom of the root portion, h) in the case of a Straight support, the inlet is axially continuous, and i) in the case of an angled support the inlet is in any of the continuous shapes or a blind hole and, in the case of an inlet in the form of a blind hole, is additionally provided a lateral opening, the arrangement is characterized in that it comprises: j) a radially enveloping groove for receiving an expansion ring that is present at the entrance, in the direction towards the end of the support, k) the fixing screw protrudes through the expansion ring, its head is housed in the expansion ring and the clamping screw can be inserted with its head in front, inside the entrance by means of the root portion; ntinua or the lateral opening provide a screwdriver with access to the head of the clamping screw, and m) in the case of a continuous entry, a section threaded internally in the upper part and having the function of receiving an occlusal screw fix the superstructure

Description

CONNECTION PROVISION BETWEEN IMPLEMENT AND SUPPORT FIELD OF APPLICATION OF THE INVENTION The present invention relates to a connection arrangement for fixing a support on an implant which can be placed on human bones, mainly a dental implant. The outward opening in the upper part of the head of the implant is a receiving perforation which extends axially downwards and which is conically extended towards the upper part, and in which the similar conical lower portion of the portion of the implant is housed. root of the support. To ensure support in terms of rotation, a non-rotational symmetric receiver contour may be provided in the receiving bore. An internally coaxial threaded bore extends from the bottom of the receiving bore. To complement the possible receptor contour in the implant, the root portion of the support may have a non-rotational symmetrical outer contour. Connection arrangements of this type are used when a straight or angled support is used which is fixed on the implant by means of a clamping screw, both axially and also against rotation. The clamping screw is inserted into the support in the manner REF: 27078 that the head of the clamping screw is supported on the support, while the threaded rod of the clamping screw protrudes from the support at the bottom and engages the axial internal thread in the head of the implant. A special screwdriver can be inserted inside the bracket that is provided for tightening and unscrewing the clamping screw, this screwdriver can be required especially in the case of angled stops, but it is also suitable for straight stops. The stop can be set in any desired rotation position, if possible non-rotational symmetrical contours in the implant and the support that limits the selectable portions of rotation according to the contour configuration of the polygon.

PREVIOUS TECHNIQUE In its simplest form, a conical, straight support has in its lower part a threaded plug which is screwed into the threaded hole internally present in the implant. The conical root portion of the support is then accommodated in the conical receiving perforation, and the head portion of the support projects above the implant rim. Here, a separate clamping screw is not required (see SCHROEDER, SUTTER, BUSER, KREKELER: Órale Implantologie [Oral implantology], Georg Thieme Verlag, Stuttgart, 2nd ed., 1994, page 122).

Figures A to ID When an angled support is used, the connection with the implant 1 hitherto has been lowered to provide the support with a lateral perforation which extends vertically towards the housing of the head of the clamping screw and through which subsequently the screwdriver has access to the clamping screw. The head of the clamping screw can be inserted via a lateral opening into the housing present in the support. It is true that the connection arrangement of this type can be assembled and bolted together in a relatively practical manner by means of a lateral perforation and the lateral opening; however, as a result of the two cuts of material adjacent to each other, a weak point is generated in the support wall. When the connection arrangement is used in the position in the patient's mouth which is at all times under considerable load, the material fatigue may occur after a period of time and may result in a fracture at this weak point. In addition, the lateral perforation must be temporarily sealed, in separation to take an impression and then it must be opened again. This requires additional work. The implants 1 mentioned above are known per se (see SCHROEDER, SUTTER, BUSER, KREKELER, ibid.). Such an implant 1 has an implant head 10 at the top and a stem portion 20 at the bottom., the implant head 10 terminates at the top with a radially encircling implant rim 11, and it is possible for an external threading 23 to be present in the shank portion 20 depending on the type of implant. The implant rim 11 surrounds the opening of the receiving bore 12 which conically tapers axially downward, as a result of which the inner cone 14 is generated. In the lower part 13 of the perforation, the receiving perforation 12 joins the coaxial threaded hole 21 which is of reduced diameter and which extends in the shaft portion 20. The internally threaded bore 21 has the internal threading 22. In the aforesaid connections constituted of an implant and a support, there is the additional problem of rotationally fixing the support placed on the implant and the problem of the height tolerance of the head part of the support protruding above the implant rim. Based on the insertion depth of the support, a position tolerance is added to the tolerance of the support length, so that the head part of the support protrudes more or less above the implant rim. When the implantology components are manufactured, the total tolerance resulting from height demands a high and expensive level of precision and even so, during later procedures, that is, in the taking of impression or when producing the master model, and when generating the crown of artificial teeth, requires high operating jacks, which, in the final analysis, alter the tolerances that are still present. To solve the disadvantages that still exist in this aspect, various construction solutions have been proposed. The rotational fixation of the support, which can be adjusted in the implant or can be placed on the implant, has been guaranteed by providing a non-rotational symmetrical contour on the lower part of the supports, which is brought into contact with a complementary contour present in the implant head. In most cases, the implant heads have an inner receiving contour, while the supports have an outer counter-contour which can be adjusted in the receiving contour (see US 4 713 003, 5 000 686, 5 022 860, 5 030 095, 5 195 892 and 5 281 140 and also EP 0 504 119). JP 95-28877 B2 can be mentioned as an example of the inversion of a positive fixation with an implant head in which there is an outer contour which is complementary to an internal contour placed on the support. However, none of the implants mentioned above is of the type with an axial, tapered receiving perforation; in the best case, the implant flange has a conical geometry. CA 1 313 597 discloses a multi-component implant arrangement with an implant, an intermediate piece which can be placed therein and a holder which can be screwed through the intermediate piece and into the implant. A threaded hole is provided internally in the head of the implant, and the intermediate piece has a conical through hole in which the conical root portion of the holder can be placed. The contours are complementary to each other and provide rotational fixation, and are placed on the implant head and on the intermediate piece. Here, once again, the implant does not have a conical receiving perforation that extends axially. The support itself is rotationally fixed only to a limited degree by the threaded segment which is to be screwed into the implant head.

US-A-5 302 126 describes a connection arrangement between an implant and an angled support. The support has a through hole for the passage of an occlusally insertable fixation screw so that the threaded portion of the fixation screw engages the head of the implant. A tapered implant flange is provided conically on the upper part of the implant to which the lower portion of the support is designed in a complementary manner. For fixation in terms of rotation, the support placed on the implant has axially projecting pins which can be inserted into the blind holes in the implant head. Several blind holes allow the choice of different positions of rotation of the support. This connection arrangement only allows stepped rotation positions and the elements are relatively complicated. An implant with an inner polygon in the inner cone is proposed by ISKOTT, H. W. A. and BELSER, U. C: Mechanical resistance of cemented post and core buildups for ITI-Bonefit implants. Clinical Oral Implantology Research, 1992, H. 3, page 128 et seq. The inner polygon is provided directly in the internal thread transition. The associated support has an outer polygon which is contiguous with the root portion in the lower part which complements the inner polygon, and from which the outer polygon and the fixing bolt extends further downwards. The support is placed in the implant so that the outer polygon of the first one lodges with positive fixation in the inner polygon of the implant. To axially fix the support on the implant, the fixation bolt that is resolved in the internal threading of the implant is stuck in place. This solution is thus restricted to the bonding or bonding of the fixation bolt in the internal thread of the implant. The document O-A-94 09717 describes a very similar configuration with respect to the interior polygon in the implant and the outer polygon in the support. The inner polygon is located, once more, in the internal thread transition, - the outer polygon is correspondingly provided in the support.

OBJECTIVE OF THE INVENTION Since the functional reliability of the connection arrangements described now is not completely satisfactory, and that this fact can be attributed to construction features, the invention is based on the following problem. A connection arrangement between an implant and a straight or angled support which possesses highly reliable stability will be produced. In addition, it must be possible for the support to be secured securely and practically on the implant and must not loosen as a result of microscopic movements. What is more, the connection arrangement should consist of the least possible amount of simple components and these should be capable of being manufactured cheaply. Finally, it is desirable that at least some parts of the connection arrangement have system design characteristics and therefore can be used for different variants of the connection arrangement, that is, for the combination with different carriers. In addition, until now a completely satisfactory construction solution for an implant with a non-rotational symmetric receiving contour in the inner cone and an associated complementary support of the type in question has not been known here, which can be joined together using an arrangement of Connection. Therefore, the invention has at the same time the objective of perfecting the implants of the generic type and the complementary supports which can be held together by the associated connection arrangement. The support, which is placed on the implant by means of its conical root portion in as free as possible free spaces, must be fixed rotationally and must not show any axial stability. The implant and the support must be able to be screwed together so that the insertion of the support in the implant can be carried out without adhesive binder and so that the connection can be undone again, If necessary. For special applications, it is desirable that brackets which are conventional and have a conical root portion, ie, with a screw cap placed at the bottom, but without a non-rotational symmetric outer counter-part also be capable of being placed within the implant.

NATURE OF THE INVENTION The principle of the proposed connection arrangement between an implant and a support consists in that the support is provided with an inlet, which can be a continuous axial conduit. A clamping screw can be placed on the head first at this entrance by means of the root portion, its threaded segment, reduced in diameter as compared to the head is designed to fit into the threaded hole that extends axially internally in the implant Before the clamping screw is placed in the support, an expanding ring is pushed over the rod segment of the clamping screw, this segment is placed between the head and the threaded segment. The expansion ring is adjusted by pressure in a groove placed at the entrance of the support. To partially receive the expansion ring in the clamping screw, a radial groove is provided below the head. Experience has shown that an expansion ring with a grooved configuration must be provided. At the head of the clamping screw there is a non-rotational symmetrical recess which serves to join an insertion tool. When the clamping screw is tightened or unscrewed, the insertion tool is passed through the continuous axial passage in the recess in the screw head. In the case of angled joints, it is suitable to provide, in addition to the similar angled and continuous entry, a lateral opening for the insertion tool to pass therethrough. Such a lateral opening is placed in particular in cases where the entry is not continuous. In the design of the system of interest, the nature of all the implant elements, is advantageous if the bore threaded internally in the implant and the internally threaded section in the holder, as well as the threaded segment of the retaining screw, have dimensions which They are similar or complementary.

The defining characteristic of the implant according to the invention is that a non-rotational symmetrical receiving contour is provided on the inner wall of the conical receiving hole, ie, on the inner cone of the implant head, with a radially uninterrupted section of the inner cone in each case that remains both above the receiving contour and also below it. If a polygon is provided as the receiving contour, then it is solidly designed on the lower side, while its points running out towards the top are in the form of a parabola. The essential characteristics of the support according to the invention are the following: in the case of a continuous entry, a threaded section can be provided internally in the upper part, section in which it is possible to insert an occlusal screw for the purpose of fixing the superstructure that is going to be placed on it. An outer counter-contour complementary to the receiving contour is provided on the root portion of the support and can be specifically and advantageously designed as an outer polygon. In analogy with the placement of the receiving contour present in the implant, the counter-contour is positioned so that the radially uninterrupted segment of the root portion remains both above and below it, and the circumferential surfaces in both segments are in the same level with each other. However, the lower segment can also be omitted. At the entrance, within the area of the root portion, there is a radially enveloping groove. Through the input provided in the support, if this entry is continuous or if not, through an additional lateral opening, it is possible for a special screwdriver, known per se that can be coupled with the positive fixing in the complementary recess in the head of the clamping screw even at an angle. The head of the screwdriver is multi-edged and presents, in vertical cross section, a pear-shaped configuration. By virtue of the invention, a connection arrangement, an implant and a complementary support are now available which are distinguished by advantageous assembly and dismantling. In addition, stable and precise retention in the assembled state is guaranteed as highly reliable. Both straight and angled supports of the type according to the invention, and conventional straight supports, can be placed on the modified implant according to the invention. That is, the supports which have a conical root portion and which do not have a counter-contour can also be placed on the implant with the special receiving contour at the head of the implant. These supports can be similarly fixed using separate fastening screws, or the supports are in one piece and, in a known manner, have a threaded rod in the lower part which engages with the internally threaded bore in the implant.

DRAWINGS AND ILLUSTRATIVE MODALITY In the following, numerous illustrative embodiments of the connection arrangement according to the invention, of the internal configuration of the implant and of the support are described in detail, with reference to the attached drawings, possible modifications at the end are discussed. In the drawings: Figure IA shows an implant according to the prior art, in partial section; Figure IB shows the implant according to figure IA in vertical section; Figure 1C shows an angled support, with an inserted set screw, according to the prior art; Figure ID shows the structural components according to Figures IA to 1C screwed together; Figure 2A shows a straight support in vertical section; Figure 2B shows an angled support with a lower conical portion; Figure 2C shows an angled support with a radially surrounding collimation, which is placed on the flange of the implant; Figure 2D shows a clamping screw, - Figure 2E shows an expansion ring, - Figure 2F shows a centering sleeve in a front view; Figure 2G shows the centering sleeve according to Figure 2F in plan view, - Figure 3A shows a connection arrangement between an implant and the straight support, according to Figure 2A; Figure 3B shows a connection arrangement between the implant and the angled support, according to Figure 2B; Figure 3C shows a connection arrangement between an implant and the angled support, according to Figure 2C; Figure 4A shows the clamping screw with an expansion ring applied; Figure 4B shows the clamping screw with the expansion ring pushed and positioned, - Figure 4C shows the clamping screw with the expansion ring when pushed into a support, according to Figure 2B; Figure 4D shows the clamping screw with the expansion ring once pushed completely into the support, according to Figure 2B; Figure 4E shows the complete connection arrangement according to Figure 2B, between the implant and the support, with a special screwdriver placed, - Figure 5 shows an implant head with a receiving contour in partial section, Figure 6A shows a perspective view of a support with a counter-contour in the conical root portion, and a fixing surface in the head part, - Figure 6B shows a support according to Figure 6A in vertical partial section; Figure 6C shows the support according to Figure 6A with the inserted set screw and the expansion ring in vertical partial section; Figure 7A shows the implant according to Figure 5, with an inserted support, according to Figure 6A; Figure 7B shows an enlarged representation of Figure 7A; and Figure 7C shows the representation according to Figure 7A, with the support likewise in partial section.

Figure IB The implant 1 used in the connection device constitutes the basic element thereof and has a structure which is known per se. The upper portion, which is shown here alone, can belong both to the hollow screw implant as well as to a solid screw implant. However, the connection arrangement is equally suitable for shaft body implants and solid body implants in straight or angled versions. For a more extensive description of the implant 1, reference is made to the description of the Figures IA to ID in the prior art section. The following sentence is valid for the entire description that follows. If, for purposes of clarity of the drawings, reference numbers are included in a figure but are not explained in the immediate relevant text of the description, then the reference is made to its mention in the descriptions of the preceding figures. For purposes of readability, the repeated designation of structural parts in successive figures is, in most cases, omitted insofar as it can be clearly discerned from the drawings to which such structural parts "recur." Figure 2A The straight support 100 has a portion 110 of tapered top neck towards the top, and a lower root portion 120 conically tapered towards the bottom. Extending axially through the support 100 is an inlet 130 which in its upper part opens outwards in a screw housing 131. Adjacent to the screw housing 131 is an internally threaded section 132 extending downward which terminates before the transition 140, between the neck portion 110 and the root portion 120. The internally threaded section 132 is joined to a chamfered surface 133 in an enlarged screw head section 134. The inlet 130 opens outwardly at the end 121 of the root portion 120, the end 121 has a rounded contour 122 and, before it reaches the rounded contour 122, a groove 135 is provided in the form of a band, radially enveloping and It serves to receive an expansion ring.

Figure 2B The rotationally symmetric, straight support 100 is almost identical in construction to the angled support 200 shown here. The angled support 200 has a neck portion 210 which is conically tapered toward the top and which joins at the transition 240 in the tapered taper portion 220 toward the bottom. However, the neck portion 210 and the root portion 220 are not placed coaxial with each other, but instead are placed at an angle with respect to each other at the transition 240, with the result that the input 230 extends through the holder 200 and is also at an appropriate angle. In the upper part, the inlet 230 likewise opens outwards in a screw housing 231, which is adjacent to an internally threaded section 232 that extends downwards. In the asymmetric beveled surface 233, the internally threaded section 232 joins the enlarged screw head section 234. The inlet 230 opens outward into the root portion 220 at the end 221, which has a rounded contour 222, here, again, before the mouth is reached, a radially enveloping groove 235 is provided at the inlet 230.

Figure 2C The modified angled support 300 differs markedly from the support 200. The neck portion 310 is still approximately identical, while the root portion 320 shows considerable changes. The transition 340 is also of different design. Again, the angled entry 330 extends through the support 300. The neck portion 310 is also conically tapered towards the top, and the root portion 320 is attached at an angle to the neck portion at the transition 340. Here again, the inlet 330 opens outward into a screw housing 331, which is adjacent to an internally threaded section 332 which extends downwardly and which is attached to a screw head section 334 enlarged by medium of an asymmetric bevelled surface 333. The inlet 330 opens outward into the root portion 320 with the contour 322 rounded off at the end 321. In the shortened root portion 320, ie, between the transition 340 and the rounded contour 322 ending at the bottom, once again, the inlet 330 is provided with a groove 335 in the form of a radially enveloping band. The transition 340 acquires its particular configuration by virtue of the fact that the recess 341 is present on the underside of the neck portion 310 and the continuous neck portion 310 in the form of a collar 342 that extends downwards. This collar 342 forms an annular counter-rib 343 which, when assembled with the implant 1, is placed in the inner ring portion of the implant rim 11 (see FIG. IB).

Figure 2D To construct the connection arrangement according to the invention in the implant 1, one of the supports 100, 220, 300 described above is alternatively necessary; a fastening screw 400 is needed for each of the different connection arrangements.

The fastening screw 400 comprises - from the top downwards - the head 410, the segment segment 420 of reduced diameter and the lower segment 430 threaded. On the underside of the head 410 there is a recess 411 with an inner contour 412 which is designed to be complementary to the head of the screwdriver (see Figure 4E). A beveled support surface 413 forms the transition between the head 410 and the stem segment 420. Approximately the middle portion, the stem segment 420 has a radially enveloping groove 421 for temporary and partial inclusion of an expansion ring (see Figure 2E). The bevels 422 and 423 form the respective transitions between the slot 421 to the full diameter of the rod segment 420. The threaded segment 430 has the external threading 431 and is designed complementary to the threaded bore 21 in the implant 1, so that the threaded segment 430 can be screwed into the threaded bore 21.

Figure 2E The pneumatic-like expansion ring 500 has a slot 510 that forms an opening therein. It has been found to be advantageous to position the slot 510 obliquely and inclined upwards to the left. The upper edge 520 of the expansion ring 500 has a beveled surface 521 directly inward which is designed complementary to the head support surface 413 of the fastening screw 400. The dimensions of the expansion ring 500 are chosen so that it can be pushed into the fastening screw 400 and adjusted by pressure within the slot 421 of the latter.

Figures 2F v 2G When a connection arrangement with an angled support 300 is constructed, a centering sleeve 600 which is in principle rotationally symmetrical, is inserted further. The centering sleeve 600 consists of a pneumatic-like base portion 610 and an adjacent circumferential continuation 620 extending upwardly. Outwardly, the centering sleeve 600 extends conically towards the top. In the base portion 610 there is an axial bore 611 with an internal thread 612, so that the centering sleeve 600 can be screwed onto the threaded segment 430 of the holding screw 400. The circumferential continuation 620 has a thinner wall than the base portion 610, as a result of which the clearance in the interior of the centering sleeve 600 increases. Several vertical expansion slots 621 are provided within the circumferential continuation 620 and extend approximately to the level of the base portion 610.

Figure 3A The straight support 100 is fixed to an implant 1 by means of a fastening screw 400 and the expansion ring 500, the conical root portion 120 of the support 100 engages in the main bore 12, that is, in the inner cone 14 of the implant 1. The head 410 of the clamping screw 401 is housed in the screw head section 134 within the inlet 130 and the expansion ring 500 is applied onto the clamping screw 400 which meets its beveled surface 521 the support surface 413 of the fastening screw 400. At the same time, the expansion ring 500 is placed in the groove 135 of the support 100. The threaded segment 430 of the holding screw 400 is screwed firmly into the threaded bore 21 of the implant 1; the external threading 431 and the internal threading 21 are in engagement with each other. By means of the tension force of the fastening screw 400 transmitted to the expansion ring 500, the support 100 is securely fixed both axially and also against rotation. The conicity of the root portion 120 and that of the inner cone 14 provide reliable stability of the connection arrangement. Internally threaded section 132 is used to fix additional accumulations.

Figure 3B Here, an angled support 200 is fixed to an implant 1 by means of the fastening screw 400 and the expansion ring 500. The structural parts are connected to each other in a manner analogous to that described in Figure 3A.

Figure 3C The support 300 is fixed at an angle on the implant 1, its counter-border 343, formed by the collar 342, is supported on the inner ring surface on the implant rim 11. In this connection arrangement, too, the clamping screw 400 and the expansion ring 500 are held together and their permanent stability is ensured in the chosen positioning, the centering sleeve 600 is additionally inserted. The centering sleeve 600 has been screwed onto the threaded segment 430 of the holding screw 400 within the main bore 12 of the implant 1 and is firmly supported on the inner cone 14 thereof. The external threading 431 of the clamping screw 400 and the internal thread 612 of the centering sleeve 600 are in contact with each other. The expansion ring 500 rests on the groove 335 of the root portion 320 of the support 300, the end 321 with the rounded contour 322 engages under the expansion ring 500. The circumferential continuation 620 of the centering sleeve 600 is held between the root portion 320 of the support 300 and the inner cone 14 of the implant 1. Here, again, the head 410 of the holding screw 400 is placed very close to the expansion ring 500 so that the support surface 413 and the beveled surface 521 are pressed against each other.

Figure 4A to 4E The production of the connection device will now be described with reference to this sequence of figures, using an angled support 200 as an example.

Figure 4A The expansion ring 500 is pushed onto the fastening screw 400 by means of the thread segment 430 and first surrounds the external threading 431. In this way, sufficiently elastic deformable expanding ring 500 is opened, i.e., slots 510 are enlarged.

Figure 4B The expansion ring 500 is further pushed in the axial direction onto the clamping screw 400, until the groove 421 of the rod segment 420 is reached, at which point the expansion ring 500 is positioned as a consequence of its inherent tensions. Since the groove 421 has a smaller diameter than the threaded segment 430, which has been traversed in advance, and the lower section of the rod segment 420, the expansion ring 500 can contract slightly, as a result of which the grooves 510 narrow.

Figure 4C Preassembled up to now, in the next step, the fastening screw 400 with the pushed expansion ring 500 is pushed from the bottom inside the support 200, ie, via the end 221 inside the inlet 230. The contour 222 rounded in the end 221, and the existing set of the expansion ring 500 placed in the slot 421, allow a regular insertion of the combination of the fastening screw 400 and the expansion ring 500 into the support 200. The head 410 and the screw 400 of fastening in this manner passes gradually into the screw head section 234.

Figure 4D After continued axial thrust, the head 410 approaches the beveled surface 233 in the holder 200 and at the same time the expansion ring 500 reaches the groove 235, within which the expansion ring 500 adjusts by pressure considering its pre-stretching. Here, the expansion ring 500 may expand outwardly again, as a result of which the slot 510 expands again.

Figure 4E Finally, the holder 200 is placed on the implant 1 in the desired rotation position. The clamping screw 400 is now firmly screwed using a special screwdriver 700 which passes through the neck portion 210 and the inlet 230. The screwdriver head 710 engages the outer contour 711, which is complementary to the inner contour 412 of the fastening screw 400. The threaded segment 430 of the clamping screw 400 is gradually screwed into the threaded bore 21 present in the implant 1, and at the same time the upper cylindrical section of the rod segment 420 is thus screwed into the placed expansion ring 500. This bolting is promoted by the bevel 422. The grooved expansion ring 500 is enlarged and placed in slot 421 with the remaining clearance. When the clamping screw 400 is tightened further, a rigid and secure connection is obtained between the implant 1 and the support 200 placed. The same operational steps are required if a connection arrangement between a straight support 100 or an angled support 300 is to be constructed. When the special angled support 300 is used, the centering sleeve 600 must be screwed onto the clamping screw 400 before adjusting the combination of clamping screw 400 and the expansion ring 500 within the implant 1.

Figure 5 The implant 1 used in the connection arrangement constitutes the basic element thereof and has a structure known per se, except for the special non-rotational symmetric receiving contour 15, in the inner cone 14 in the implant head 10. Here, the receiving contour 15 is designed as a radially enveloping polygon. This polygon can be created by removing material, for which purpose an enveloping groove 17 is recommended radially below the receiving contour 15 and also in the inner cone 14, for joining. By means of the removal of the material, the steps 16 are generated in the lower part of the polygon. On the lower side, the polygon is of solid design, while it runs outward in parabolic points towards the top. The receiving contour 15 is advantageously located in the inner cone 14 in such a way that the uninterrupted sections 18, 19 of the inner cone 14 remain both above the receiving contour 15 and below it. For a setting as stable and narrow as possible of the support which is to be inserted, it is suitable to design the upper section 18 with a sufficient height.

Figure 6A The support 800 has the neck portion 810 at the top, and the cone portion 820 adjacent at its bottom. The inlet 830, here in the form of a continuous axial conduit, extends through the support 800. By way of example, at least one of the flat surfaces 811, which in principle run vertically, is provided on the neck portion 810. and serves to rotationally fix the crown or superstructure layer which is to be placed at a later stage on the support 800. At the same time, the flat surface 811 can be used to apply a screwing tool. This is an advantageous alternative for providing three flat surfaces 811 each deflected 120 °. The flat surface 811 runs outward in an arcuate shape in the direction of the cone portion 820. The cone portion 820 has a counter-contour 825 which is complementary to the receiving contour 15 present in the implant 1, so that the holder 800 can be placed, rotationally fixed within the implant 1. Analogous to the lowered polygon designed as the contour 15 receiver, the 825 counterpart is similarly designed as a polygon in this example. The counter-contour 825 is placed in the cone portion 820 in such a way that, in this case also, the uninterrupted segments 828, 829 of the cone portion 820 remain. The circumferential surfaces of both segments 828 and 829 are in the same plane with each other, and in the same way as the sections 18, 19 of the inner cone 14 in the implant head 10 which are also in the same plane with each other. Rungs 826 are produced in transitions from segment 828 to back-contour 825 and from the latter to the segment 829. In the lower part, the support 800 and its segment 829 end at the end 821. It is also possible to place the counter-contour 825 immediately adjacent the end 821.

Figure 6B Within the inlet 830, an internally threaded portion 832 starting at the top can be provided, and before the lower opening of the inlet 830 there is a radially encircling groove 835. The internally threaded section 838 can serve to receive an occlusal screw with which the superstructure can be secured. The threaded bolt of the occlusal screw extends only partially inside the inlet 830. A non-threaded screw head section 834 remains between internally threaded section 832 and slot 835.

Figure 6C To construct the connection arrangement consisting of the implant 1 and the support 800, a fastening screw 400 is used. The fastening screw 400 comprises - from the top downwards - the head 410, the segment segment 420 of reduced diameter and the lower segment 430 threaded. On the upper side of the head 410 is a recess 411 with an inner contour 412 which is designed to be complementary to the tip of the insertion tool used. Below the head 410, the rod segment 420 is provided with a radially enveloping groove 421 for partial inclusion in the expansion ring 500. The threaded segment 430 is designed complementary to the bore 21 threaded internally in the implant 1, so that the threaded segment 430 can be screwed into the bore 21 internally threaded. The fastening screw 400 with the expansion ring 500, which is housed in the slot 421, is pushed into the inlet 830 of the support 800 from the bottom, and with the head 810 forward, until the ring 500 of expansion - this may be in the form of pneumatic and grooved - adjusted by pressure within the groove 835 present in the bracket 800. The head 810 of the fastening screw 400 is thus placed within the head section 834 of the screw in the entrance 830 of the support 800. The insertion tool can be guided through the entrance 830 to the head 410 of the fastening screw 400.

Figures 7A to 7C In the assembled state, the support 800 - provided here with a flat surface 811 - is placed with its conical root portion 820 in the implant head 10, while the neck portion 810 of the holder 800 protrudes above the rim 11 implant. The sections 18, 19 of the inner cone 14 are located to be placed against the segments 828, 829 of the root portion 820 of the support 800. The counter-contour 825 of the support 800 is housed in the receiving contour 15 of the implant 1. The screw 400 The clamping segment 430 presses via its head 410 into the expansion ring 500, which is also partially in the groove 835 in the support 800. The threaded segment 430 of the clamping screw 400 engages in the bore 21 threaded internally in the implant l. In this way, the support 800 is placed inside the implant 1, guaranteeing axial fixation and rotational assurance. At the level between the receiving contour 15 and the counter-contour 825 there is a certain play, so that the rung 826 of the counter-contour 825 under no circumstances is housed in the rung 16 in the implant 1. The important factor is that the conical surfaces 18, 19; 828, 829 of both parties 1, 800 are against each other.

Further variations are possible in the construction of the illustrative embodiments described above. The following are mentioned here in particular: It is also possible, in angled supports, 200, 300, 800 with or without counter-contour 825, to provide a lateral opening for coupling a screwdriver to act on the fastening screw 400. If the inlet 230, 330, 830 is continuous and has an internally threaded section 232, 332, 832 at the top, then the inlet and the threading alone have the function of receiving the occlusal screw to fix the superstructure. If the inlet 230, 330, 830 is not continuous and there is an internally threaded section 232, 332, 832, then the superstructure adheres in the conventional manner. - Instead of being recessed by means of material removal, the non-rotational symmetric receiving contour 15 provided in the inner cone 14 in the implant head 10 must also be enhanced, in which case then it would have to have a correspondingly reduced counter-contour in the Union. As regards the reception contour 15 and the complementary counter-contour 825, it is possible to use all the non-rotational symmetric geometries that can be opened, such as polygons, ovals, star shapes and rosettes or simpler edges, bolts and supports with their formations positive complementary fixation. The shape and presence of the outer rotational locking contours in the neck portion 810 of the support 800 is not mandatory and the neck portions 810, as such, can have any desired practicable configuration. Flat surfaces 811 may be omitted or replaced by other geometries or formations provided for rotational fixation. In the neck portion 810 a coupling means for transverse screwing of the superstructure can be provided. The neck portions 110, 210, 310, 810 of the supports 100, 200, 300, 800 can be rendered smooth in their normal extension for adaptation. The lower conical segment 829 on the support 800 may be smaller or larger than the upper segment 828. The segment 829 can also be supplied in its entirety, in which case the counter-contour 825 would extend to the end 821. The supports 800 can be straight or angled.

At the angle of a straight support 800 with a continuous inlet 830, the latter extends in a straight line. In contrast, in the case of an angled support, whose neck portion is angled relative to the root portion, a continuous inlet has a corresponding angled configuration. With regard to the head 410 of the screw 400, instead of the recess 411 with the inner contour 412, it is also possible to provide an outer contour on which an insertion tool can be applied. As regards the clamping screw 400, the lower section of the rod segment 420, which is contiguous with the threaded segment 430, is not absolutely necessary. The slot 510 in the expansion ring 500 can also extend approximately vertically; or a plurality of expansion slots may be provided. - The recess 411 in the head 410 of the clamping screw 400 can also be worked without the bevel 414, so that a square interior contour 412 of exact sides is obtained. The bezel 722 on the head 710 of the screwdriver can also be supplied with it.

It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates. Having described the invention as above, property is claimed as contained in the following:

Claims (14)

1. l. A connection arrangement between an implant, mainly a dental implant, and a support to be fixed on the implant, wherein a) the implant has a head portion and a shaft portion extending downward, - b) in the head portion there is a main perforation which ends in the manner of a blind hole in the lower part of the perforation, from which extends a threaded hole that runs downwards, axially, with an internal thread, - c) the main perforation is conically contoured, as a result of which an enlarged inner cone is obtained upwards, - d) the implant terminates in its upper part with an implant flange which may be tapered upwards; e) the support has an upper neck portion and a lower root portion, the first protrudes from the implant and the latter engages with the inner cone, - f) a fastening screw is provided which connects the support to the implant and whose the head is housed in the holder, while its threaded segment engages the threaded bore, - g) the holder has an inlet that begins at the bottom of the root portion; h) in the case of a straight support, the entrance is axially continuous, - yi) in the case of an angled support, the entrance is at an angle in any of the continuous forms or a blind perforation and, in the case of an inlet in the form of a blind perforation, a lateral opening is further provided, the arrangement is characterized in that it comprises j) a radially enveloping groove for receiving an expansion ring that is present at the entrance, in the direction towards the end of the support, -) the clamping screw protrudes through the expansion ring, its head is housed in the expansion ring and the clamping screw can be inserted, with its head in front, into the entrance by means of the root portion; 1) the continuous inlet or the side opening provide a screwdriver with access to the head of the clamping screw, - and m) in the case of a continuous input, a section threaded internally in the upper part and having the function of receive an occlusal screw to fix the superstructure.
2. 2. The connection arrangement according to claim 1, characterized in that: a) the clamping screw consists of the head, of a segment of adjacent rod of reduced diameters, and of the lower thread segment, - b) a supporting surface is present beveled at the transition from the head to the stem segment, - c) a radially enveloping groove is provided to temporarily receive the expansion ring in the rod segment, as a result of which the segment of the rod is divided into three sectors, specifically an upper section and a lower section above and below the slot, respectively, and the slot itself, - d) the expansion ring is mounted placed on the rod segment, which is located below the head of the screw subjection; and e) the transitions between the groove and the adjacent sections of the rod segment are formed by bevels.
3. 3. The connection arrangement according to claim 1 or 2, characterized in that the fastening screw has a recess on the head with an internal contour for coupling a screwdriver, the screwdriver head of which has an outer contour complementary to the inner contour.
4. 4. The connection arrangement according to claim 3 characterized in that the inner contour formed by the recess in the head of the clamping screw is a four-sided or five-sided contour which is in the form of a blind hole and which extends from the top side of the head axially inside the latter and can be opened outwards at the bottom, in a cone tip at a wide angle.
5. 5. The connection arrangement according to claim 1 or 2, characterized in that: a) the expansion ring has a completely continuous groove that forms an opening in the expansion ring; and b) at the upper edge of the expansion ring, a bevelled surface is provided which is complementary to the support surface present in the fastening screw.
6. 6. The connection arrangement according to claim 1, characterized in that the clamping screw can be inserted, with the expansion ring applied and with the head in front, inside the joint entrance.
7. 7. The connection arrangement according to claim 1, characterized in that the implant has an upper portion, a radially enveloping annular implant rim within which an axially extending main bore opens outward, main bore which extends conically towards the upper part forms an inner cone and is designed for the insertion of the conical root portion of the support, the connection is characterized because: a) a non-rotational symmetrical reception contour is provided in the inner cone; b) the receiving contour is designed so that a radially unbroken section of the inner cone remains both above and below it, - where c) the upper section does not have a height smaller than the lower section, - d ) the receiving contour is an internal polygon which is of solid design on the lower side and runs out at parabolic points towards the upper part; and e) below the receiving contour and directly adjacent to the latter, there is a radially enveloping groove in the inner cone.
8. 8. A support, in particular for use in connection, with the arrangement according to claim 1, wherein: a) the support is straight or angled and has an upper neck portion and a lower root portion; b) a continuous input is provided, starting at the bottom of the root portion, at the end, the support is characterized in that; c) a radially enveloping groove is present to receive an expanding ring at the inlet, in the direction towards the end of the support, - and d) a clamping screw, with its head in front, can be introduced at the entrance via the portion of root.
9. 9. The support according to claim 8, characterized in that a) a screw housing is present at the end of the neck portion inside the inlet, - and b) below the screw housing in the neck portion there is an internally threaded section which extends as far as the bevelled surface and which is contiguous with an enlarged screw head section.
10. 10. The support according to claim 8 or 9, characterized in that the support has externally, at the transition between the neck portion and the root portion, a recess and a collar which forms a complementary counter-border which, in the assembled state, it is housed on the inner annular surface of the implant rim.
11. 11. The support according to claim 10, and when used in connection with the arrangement according to claim 1, the support is characterized in that the centering sleeve is placed inside the inner cone of the implant and is screwed onto the threaded segment of the implant. clamping screw, and receives within it the root portion inside the expansion ring.
12. 12. The support according to claim 8, characterized in that: a) the root portion is conical, - b) for retention purposes, a non-rotational symmetrical outer counter-contour can be provided in the root portion, which is designed to be inserted in a reception contour provided in the implant, - c) in the case of a straight support, the entrance is axially continuous, - d) in the case of an angled support, the entrance is at an angle and is continuous or form of a blind hole and, in the case of an inlet in the form of a blind hole, a side opening is additionally provided; e) continuous entry or side opening provide access for a screwdriver; f) in the case of a continuous entry, a section threaded internally in the upper part may be present and has the function of receiving an occlusal screw to fix the superstructure; and g) the neck portion can have at least one flat surface on its outside.
13. 13. The support according to claim 12, characterized in that the counter-contour is designed as a polygon, such that: a) a radially uninterrupted segment of the root portion remains both above and below it, and the circumferential surfaces of both segments are in the same plane with each other, the lower segment is larger or smaller in height than the upper segment; or b) the lower segment is supplied with, as a result of which, the counter-contour extends directly to the end.
14. 14. The centering sleeve according to claim 11, characterized in that: a) the centering sleeve consists of a base portion in the form of a lower tire and a circumferential continuation of the thin-walled shape extending upwards, the sleeve centered extends externally conically towards the upper part, complementary to the shape of the inner cone; b) in the base portion there is an axial bore with an internal thread which can be adjusted with the external thread, - and c) a plurality of vertical expansion grooves are formed in the circumferential continuation and which approximately reach the level of the portion of base.