Abstract
A method for the calibration of a data acquisition device and a peripheral device, in particular a CAD miller, 3D printer or a laser for laser sintering, to test bodies which have been developed for carrying out this method and to sets which include these test bodies as well as test pins which match these.
Claims
1. A method for calibrating a data acquisition device and a peripheral device, comprising the following steps: a) providing a standardized test body which consists of a positive part and a negative part and comprises a standardized, digital data set of the three-dimensional data of the negative part of the test body as a shape master; b) acquiring three-dimensional data of the positive part of the standardized test body from a) by the data acquisition device to be calibrated and generating a corresponding digital data set of the positive part of the standardized test body; c) importing the digital data set from b) into CAD software and loading a standardized, digital data set from a); d) designing the negative part with the help of the digital data set from b), the standardized digital data set from a) and the CAD software from c); e) producing the negative part amid the use of the design from d) and the peripheral device to be calibrated; and f) examining the fitting accuracy between the negative part from step e) and the positive part of the standardized test body from a).
2. A method for calibrating a data acquisition device and a peripheral device, comprising the following steps: a) providing a standardized test body which consists of a positive part and of a negative part, and a standardized digital data set which comprises the three-dimensional data of the positive part of the test body as a shape master; b) acquiring three-dimensional data of the negative part of the standardized test body with the data acquisition device to be calibrated and generating a corresponding digital data set of the negative part of the standardized test body, c) importing the digital data set from b) into CAD software and loading the standardized digital data set from a); d) designing the positive part with the help of the digital data set from b), the standardized digital data set from a) and the CAD software from c); e) producing the positive part amid the use of the design from d) and the peripheral device to be calibrated; and f) examining the fitting accuracy between the positive part from step e) and the negative part of the standardized test body from a).
3. The method of claim 1, comprising the further steps of: g) repeating the steps c) to f) and herein adapting or optimizing the parameters of the CAD software and the device parameters until the fitting accuracy in step f) lies in the range of predefined tolerances and h) acquiring and storing the adapted parameters of the CAD software and of the calibrated devices.
4. The method of claim 1, wherein in step b), the acquisition of the three-dimensional data of the negative part or positive part is effected by scanning.
5. The method of claim 1, wherein the digital data set which is created in b) and the standardized data set are present and transferred in .stl format.
6. The method of claim 1, wherein step d) comprises a matching of the three-dimensional, digital data from b) and of the standardized digital data set from a).
7. A test body for calibrating a data acquisition device and a peripheral device, wherein the test body consists of a positive part and a negative part, and wherein the positive part and the negative part engage into one another such that at least one horizontal contact surface, a Morse taper and an oblique contact surface exist, wherein the oblique contact surface reaches to the surface of the test body.
8. The test body according to claim 7, wherein the oblique contact surface ends at the periphery of the test body.
9. The test body according to claim 7, wherein the test body consist of a shape-stable material.
10. The test body according to claim 7, wherein the positive part and the negative part of the test body have been manufactured of different materials.
11. The test body according to claim 7, wherein the test body comprises at least one channel which permits the insertion of a test pin into the test body of the positive part and the negative part.
12. The test body according to claim 11, wherein the at least one channel in its course has a step in the inside.
13. The test body according to claim 7, wherein the positive part and the negative part comprise a base body and at least one post.
14. A set consisting of a test body according to claim 7 and at least one test pin that can be inserted into the at least one channel of the test body.
15. The set according to claim 14, further comprising at least one standardized, digital data set of the positive part of the test body and at least one standardized, digital data set of the negative part of the test body.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0122] The test bodies according to the invention are further described in more detail by way of the subsequent drawings, wherein:
[0123] FIG. 1A: shows a positive part (2a) of a test body according to the invention, in a longitudinal section.
[0124] FIG. 1B: shows a further positive part (2b) of a test body according to the invention, in a longitudinal section.
[0125] FIG. 2A: shows a positive part (2a) of FIG. 1A, which has been joined together with a matching negative part (1a) and together forms a test body according to the invention.
[0126] FIG. 2B: shows the poitive part (2b) of FIG. 1B, which has been joined together with a matching negative part (1b) and together forms a test body according to the invention.
[0127] FIG. 3A: shows the test body according to the invention of FIG. 2A, into which a test pin (8) has been inserted.
[0128] FIG. 3B: shows the test body according to the invention of FIG. 2B, into which a test pin (8) has been inserted.
[0129] FIG. 4: shows a positive part (2) of a test body according to the invention, which includes two posts (9a, 9b), in a longitudinal section.
[0130] FIG. 5: shows the positive part (2) of FIG. 4, which has been joined together with a matching negative part (1) and together forms a test body according to the invention.
[0131] FIG. 6: shows the test body according to the invention of FIG. 5, into which 2 test pins (8) have been inserted.
[0132] FIG. 7A: a shows a negative part (1, above) in a lower view, and a positive part (2, below) of a test body according to the invention.
[0133] FIG. 7B: shows the test body of FIG. 7A after the engagement of the negative part (1) and the positive part (2) into one another, in a view from above.
[0134] FIG. 8: shows a positive part (2) with three posts (9a, 9b and 9c) in a view from above.
[0135] FIG. 9: shows a further positive part (2) with three posts (9a, 9b and 9c) in a view from above.
[0136] FIG. 10: shows 2 possible post variations (9a, 9b), which can occur with the test bodies according to the invention with at least 3 posts.
[0137] FIG. 11: shows a further positive part (2) with three posts (9a, 9b and 9c) in a view from above.
[0138] FIG. 12: shows a positive part (2) with four posts (9a, 9b, 9c and 9d) in a view from above.
[0139] FIG. 13: shows a positive part (2) with four posts (9a, 9b, 9c and 9d) in a view from above, wherein the arrangement of the posts varies in comparison with FIG. 12.
[0140] FIG. 14: shows a test body according to the invention (positive part and negative part) with three posts (9a, 9b and 9c) in a view from above.
[0141] FIG. 15: shows a further test body according to the invention (positive part 2 and negative part 1) with three posts (9a, 9b and 9c) in a view from above, wherein the arrangement of the posts (9a, 9b and 9c) and the shape of the base body of the negative part 1 vary in comparison with FIG. 14.
[0142] FIG. 16: shows a test body according to the invention (positive part 2 and negative part 1) with four posts (9a, 9b, 9c, and 9c) in a view from above.
[0143] FIG. 17: shows a further test body according to the invention (positive part 2 and negative part 1) with four posts (9a, 9b, 9c and 9d) in a view from above, wherein the shape of the base body of the negative part (1) varies in comparison to FIG. 16.
[0144] FIG. 18: shows three different test pins (8), which can be used in combination with the test bodies according to the invention.
[0145] FIG. 19: shows an aspect of a dental implant system, which can be optimised with the help of the computer-implemented method according to the invention.
[0146] FIG. 20: shows a further aspect of a dental implant system, which can be optimised with the help of the computer-implemented method according to the invention.
[0147] FIG. 21: shows an aspect of a dental implant system, which can be optimised with the help of the computer-implemented method according to the invention.
[0148] FIG. 22: shows an aspect of a dental implant system, which can be optimised with the help of the computer-implemented method according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0149] FIGS. 1A to 3B by way of two simply designed examples of a test body according to the invention show its construction as well as the most important constituents and features. As has been generally explained further above and is evident from FIG. 2, a test body according to the invention includes a positive part (2) and a negative part (1), wherein the positive part (2) and the negative part (1) at their end-faces engage into one another with their respective corresponding horizontal (3) and oblique inner (4) and/or outer (5) contact surfaces. The positive part (2a) as is shown in FIG. 1A is essentially a column with a round cross section, wherein other cross sections are also possible, such as, e.g., oval, square, rectangular or irregular cross sections. At its upper end it includes an obliquely outwardly tapering surface (5). This is directed to a geometry as is common for dental preparations and TL implants (tissue level implants). The obliquely outwardly tapering surface (5) in the periphery abruptly changes the inclination angle. In the shown longitudinal section, this is to be recognised by way of the horizontal contact surface following differently steep sections to the outside. The positive part additionally has a Morse taper or hollow cone (11) and in the centre has a central channel (6) in the z-axis direction (analogously to a screw hole). The positive part (2b) as is shown in FIG. 1B is essentially likewise a round column. It includes a plane end-face/contact surface without a bevelling. It is adapted to the geometry as is common for step preparations and implants with butt-joint connections or head-to-head connections. The positive part (2b) likewise has a hollow cone (11) and a channel (6) that runs in the centre.
[0150] FIGS. 2A and 2B in a longitudinal section show the positive parts (2a, 2b) from FIGS. 1A and 2B together with matching negative parts (1a, 1b). A positive part and the associated negative part together each form a test body according to the invention. As is evident from FIGS. 2A and 2B, the positive parts (2a, 2b) and the negative parts (1a, 1b) are designed such that they engage into one another. It is preferable for the positive parts (2a, 2b) and the negative parts (1a, 1b) to engage into one another in such an exactly fitting manner that the contact surfaces mate without forming a gap. Depending on the manufacture and the material from which the test bodies are manufactured, this is not always possible. Possibly occurring gaps between the contact surfaces of the counter-pieces (positive part and negative part of the test body), however, should preferably not be larger than 0.1 mm, further preferably not greater than 0.5 mm and in particular not larger than 0.05 mm.
[0151] Both counter-pieces of the test bodies according to FIGS. 2A and 2B, thus the positive part (2a, 2b) and the negative part (1a, 1b) have a section of the outer surface that fit into one another, said section running horizontally to the stand surface of the test body, so that a horizontal contact surface (3) arises on joining together both counter-pieces. The test body according to the invention of FIG. 2A further has two obliquely running contact surfaces (5) that both run up to the outer surface of the test body. These two oblique surfaces have a different angle of inclination. The test body according to the invention of FIG. 2B has an obliquely running contact surface (5), which runs up to the surface of the test body and simultaneously forms part of the Morse taper.
[0152] The negative parts (1a, 1b) on the surface that engages into the contact surface of the corresponding positive part include a Morse taper, which fits into the Morse taper of the positive part (2a or 2b) such that a self-locking occurs. What is significant for this is the inclination angle, but the surface roughness and the temperature also have an influence. The Morse taper or inner cone (11) and the oblique contact surface, which tapers up to the surface of the test body (5), permit an assessment of the peripheral accuracy and the shrinkage compensation. The test body according to FIGS. 2A and 2B or according to FIGS. 3A and 3B include a central channel (6) that is led through the respective negative part (1a, 1b) and projects into the positive part (2a, 2b). The channel has a step (7) or a shoulder in its course. The diameter of the channel reduces at this step (7). The channel preferably has a round cross section but can also be oval or polygonal.
[0153] In FIGS. 3A and 3B, the test bodies of FIGS. 2A and 2B are shown with an inserted test pin (8). The test pin (8) has an outer diameter, which is only insignificantly smaller that the inner diameter of the channel (6). The test pin thus likewise fits into the test body in an as exactly fitting as possible manner. Concerning the embodiment according to FIGS. 3A and 3B, the channel each includes a step (7). Consequently, the test pin (8) should also have a step (running oppositely), at which the diameter of the cross section of the test pin (8) reduces in accordance with the diameter of the channel (6) in the test body. The shown step forms a 90° angle (herein it is always specified as the angle in degrees to the horizontal contact surface). The insertion of a test pin into the test bodies according to the invention permits the setting and adjusting of hole tolerances. A step (7) in the inside of the channel (6) and the matching pin construction permits the so-called Sheffield test, which serves for testing the correct seating of the inner configuration.
[0154] FIGS. 4 to 6 show a preferred embodiment of a test body according to the invention as longitudinal sections. The same elements are provided with the same reference numerals as in the previous Figures. The positive part (2), which is shown in FIG. 4, has a cuboid base body (10) and two posts (9a, 9b). These posts can be designed as columns with an arbitrary cross section. In a preferred embodiment, both columns have a round cross section. The contact surface of the counter-pieces (positive part and negative part) is formed by the posts. The positive part (2) shown in FIG. 4 simulates two bridge posts whose geometry is adapted to the common geometries of implant posts and natural posts in the dental field. The distance between the two posts (9a, 9b) is therefore preferably between 5 and 7 mm and corresponds roughly to the width of a premolar. The two posts (9a, 9b) are aligned parallel to one another (parallel, vertical axes). A central channel (6) runs in each post. The post (9a), which is at the left in the picture, in the periphery changes in the design of its contact surfaces or the contact surface with the counter-piece. This is possible in all embodiments of the test bodies according to the invention. In the shown longitudinal section, this can be recognised in that differently steep sections follow after the horizontal contact surface. A change of the gradient of the bevelled contact surface is preferably designed as a step which occurs at two locations. Herein, these steps in cross section can be arranged directly oppositely (lie on a straight line through the circular cross section) so that after 180° a change between a steeper, longer bevelling up to a shallower, shorter bevelling occurs. The bevelled contact surface can however also be designed with a continuously changing gradient. Furthermore, it can also run in the form of a helix or spiral around the column. Furthermore, the post (9a) includes a horizontal contact surface (3) and an inner cone (1).
[0155] The post (9b), which is arranged at the right, includes a plane end-face without a bevelling (horizontal contact surface 3) and likewise has a hollow cone (11) and a channel (6) which runs in the centre. The posts (9a and 9b) of the positive part (2) are differently high. This is selected since the implant shoulders in the mouth very often come to lie at different levels. These level differences represent difficulties with regard to an optimal fitting which can be tested with the test bodies according to the invention.
[0156] The negative part (1) in FIG. 5 simulates a 3-part bridge, which is received by the positive part (2) in an exactly fitting manner. The base body (10) of the negative part, which here is designed as a connector, has the shape of a cuboid which is arranged between the two posts. The posts are columns whose cross section is preferably round. The contact surfaces of the negative part according to the invention are designed such that they have a shape that corresponds to the contact surfaces of the positive part. They preferably assume a positive connection with the contact surfaces of the positive part. The contact surfaces form the contact surface of the counter-pieces of the test body. The height of the base body of the negative part (1) is preferably approx. 4 mm and is preferably approx. 2.25 mm wide. The cross section of this preferred embodiment accordingly roughly corresponds to the recommendations for the correct dimensioning of bridge connectors given 3-part bridges. The combination of the preferred post distance and the preferred dimensions of the connection zone in the negative part (1) permits the testing of the torsional stiffness of a test body with the sintering process and its possible shape bending, which can likewise be observed in the Z axis (bending occlusally) with the sintering process.
[0157] The total height of the negative part (1) is preferably between 4 and 8 mm and herewith simulates a clinically common material thickness. It gives the test body the necessary strength, which renders the setting of the correct cement gap well testable.
[0158] In FIG. 6, the test body of FIG. 5 is shown with two inserted test pins (8). Each of the two test pins (8) has an outer diameter that is only insignificantly smaller that the inner diameter of the respective channel (6) in the test body.
[0159] A negative part (1, above) in a lower view and a positive part (2, bottom) of a test body according to the invention are shown in a plan view in FIG. 7A. The lower view of the negative part (1) considers the negative part from below, inasmuch as one uses the arrangement in the test body as a measure. FIG. 7A therefore for both parts of a test body shows the contact surfaces, which correspond and which come to lie on one another in the test body and are accordingly located in the inside of the joined-together test body. A channel (6) is to be seen centrally in each of the two round posts of the negative part (1). A Morse taper (4) directly surrounds this channel in both posts. In turn, a horizontal contact surface (3) connects onto the lateral surface of the Morse taper. In the post (9b), the lateral surface of the Morse taper is surrounded by half of its periphery by a horizontal contact surface (3). On the side of the post (9b), which faces outwards, the lateral surface of the Morse taper in the negative part runs further to the outer lateral surface of the post. An oblique contact surface (5) whose bevelling reaches up to the lateral surface of the column and hence to the surface of the test body is arranged in the post (9a) to the outside. This contact surface (5) changes its inclination angle in the periphery of the column (indicated by the dashed line).
[0160] The surface of the shown positive part (2) is designed corresponding to this. A channel (6) is also to be seen in each of the two round posts of the positive part (2), said channel having the same cross section on the surface as the channel (6) in the lower view of the negative part. The lateral surface of the Morse taper (11) (concentrically) connects onto the channel (6). In both posts, the Morse taper is designed such that its oblique contact surface connects to the channel (6) in a direct manner. The lateral surface of the Morse taper (11) in both posts is surrounded by a horizontal contact surface (3). In the post (9a), which is arranged to the left in the drawing, an oblique contact surface (5) whose bevelling reaches to the outer surface of the test body is arranged in the post at the very outside. The dashed line indicates that after 180° the bevelling of this surface changes abruptly. The surface therefore has a significantly larger gradient to the outside than to the inside.
[0161] FIG. 7B shows the joined-together test body in a plan view. Apart from the negative part (1) and the positive part (2), one can see a channel (6) with a step (7) in the course, in each of the posts, wherein the step lies in the negative part. The diameter of the channel preferably reduces abruptly at this step, so that a horizontal surface is to be seen in the plan view. According to the invention, a step at which the radius of the cross section changes can be present in the course of the channel, either in the positive part or in the negative part. This step can also coincide precisely with the transition from the positive part to the negative part. In such a case, the channel of the negative part and of the positive part would have a differently large radius, wherein preferably the radius of the negative part is larger and the channel in the negative part runs in a continuous manner, so that a test pin as is shown in the drawing 6 can be inserted from the negative part into the put-together test body. The ability of the insertion of the test pin from the negative part is generally preferred in the context of the test bodies according to the invention.
[0162] FIG. 8 shows a positive part (2) of a test body according to the invention with three round posts (9a, 9b and 9c) in a view from above. It is preferable for at least one post to have the same contact surfaces as shown in FIG. 2a or 2b in the case of embodiments with more than 2 posts. It is further preferable for at least one post to have the same contact surfaces to the negative part, as is show in FIG. 2a and a further post to have the same contact surfaces to the negative part, as is shown in FIG. 2b. The base body has a square base surface and the three posts (9a, 9b and 9c) are attached such that they form an equilateral triangle (the middle axes of the columns run through the corner points of an equilateral triangle), wherein one of the posts (9c) is arranged in the middle of one of the side surfaces of the square base surface. However, it is also possible for the posts to have an alternative arrangement. Herein, it is preferably for them to form a triangle, thus not to be arranged in a row. The posts (9a, 9b, and 9c) however can also form an asymmetrical triangular shape by way of the base body having a different base surface or the posts being arranged accordingly on the base body. The distance of the individual posts (9a, 9b and 9c) to one another is 1 mm to 12 mm independently of one another. All three shown posts (9a, 9b and 9c) include a channel (6). Two of the posts (9a and 9c) are provided with an identical structure of the contact surfaces. A Morse taper (11) or an inner oblique contact surface connects onto the channel (6). This to the outside concentrically follows a horizontal contact surface (3) and an oblique contact surface (5) whose gradient is unchanged over the complete periphery. The third post (9b) adjacent to the channel (6) shows a Morse taper (11) followed by a horizontal contact surface (5).
[0163] FIG. 9 shows a further positive part (2) of a test body according to the invention with three posts (9a, 9b and 9c) in a view from above. In comparison to FIG. 8, the post (9c) of this positive part (2), which is arranged at the top in the Figure, is designed without a channel (6) and centrally includes a Morse taper (11) followed by an oblique contact surface (5). The post (9a), which is shown at the bottom left corresponds to the post (9a) of FIG. 8, with the exception that the outer oblique contact surface (5) changes the inclination after 180°. The post (9b) corresponds to the post (9b) of FIG. 8.
[0164] With more than two posts, the variation possibilities of the contacts surfaces or rest surfaces, which are formed by a certain post, are increased. Thus, the individual contacts surfaces of the posts can be designed in a simpler manner, wherein then however the posts vary to a greater extent within a positive or negative part of the test body. In FIG. 10, two very simply designed post variations (9a, 9b) are shown, wherein the post of the positive part as well as the corresponding post of the negative part is shown. A corresponding test pin (8) is also shown at post (9b). Both posts include a channel (6) with a step (7) for a test pin (8). In the post (9a), the step (7) is designed at an angle >90 degrees (not evident in the Figure); in the post (9b) the step (7) forms an angle of 90°. The contact surface of the post (9a) is designed obliquely (5) to the outside and horizontally inwards (2). The post (9b) has only has a horizontal contact surface (3). Theoretically, also only an oblique contact surface, inclined to the inside or outside can be present.
[0165] FIG. 11 likewise shows a positive part (2) of a test body according to the invention with three posts (9a, 9b and 9c) in a view from above. The posts (9a, 9b and 9c) form an isosceles triangle by way of them each being attached in each corner of a cube-shaped base body. The triangular arrangement is preferably applied such that it mirrors the shape of an anterior tooth and molar distribution, as is to be found in a jaw.
[0166] FIG. 12 shows a positive part (2) with four posts (9a, 9b, 9c and 9d) in a view from above. The posts are arranged on the base body in a rectangular shape. The distance of the individual posts is preferably between 1 and 12 mm. The posts of the positive part (2), which is shown in FIG. 12, each have different contact or rest surfaces, which are denoted by the respective reference numerals.
[0167] FIG. 13 shows a positive part (2) of a test body according to the invention with four posts (9a, 9b, 9c and 9d) in a view from above, wherein the arrangement of the posts varies when compared to FIG. 12. The shown arrangement corresponds to a trapezium. Basically, the arrangement of the posts is however arbitrary. It is basically preferable for at least one surface of each post to have a corresponding contact surface in the corresponding negative part. The arrangement of the posts shown herein corresponds roughly to an arrangement as often occurs in one of the jaw halves and in the dental-medical daily routine corresponds largely to a set up in a dental arch. This arrangement permits the testing of the correct settings of the variables that are responsible for the dimensional reproduction of the workpieces in the negative shape (sintering behaviour—completion of the oven settings given a sintering oven) and permits information of the volume behaviour and compression (shortening of the paths) of the workpieces.
[0168] FIG. 14 shows a test body according to the invention (positive part (2) and negative part (1)) with three posts (9a, 9b and 9c) in a view from above. The three posts (9a, 9b and 9c) include a central channel (6) with a step (7). The positive part (2) is cube-shaped. The negative part (1) consists of three posts (9a, 9b and 9c) which are connected to one another by way of two connectors which form the base body of the negative part. The shown test body includes three posts in an arrangement that corresponds to the actually occurring post distribution in one of the two jaws. The negative part, which includes two connectors but which includes no base body between two of the three posts, permits an additional control of the sintering behaviour of the material. This type of post arrangement is very often used with wide-spanning or long spanning tooth gaps, which are to be provided with so-called bridge parts.
[0169] FIG. 15 shows a further test body according to the invention (positive part (2) and negative part (1)) with three posts (9a, 9b and 9c) in a view from above, wherein the shape of the base body of the negative part varies. All three posts (9a, 9b and 9c) include a central channel (6) with a step (7), wherein the channels reach through the base body. The negative part (1) consists of three posts (9a, 9b and 9c), which are connected to one another by way of connectors that form the base body of the negative part.
[0170] FIG. 16 shows a test body according to the invention (positive part (2) and negative part (1)) with four posts in a view from above. All four posts (9a, 9b, 9c and 9d) include a central channel (6) with a step (7). The positive part (2) has a rectangular base shape. The negative part (1) includes four posts (9a, 9b, 9c and 9d), which are connected to one another by way of three connectors which form the base body of the negative part.
[0171] FIG. 17 shows a further test body according to the invention (positive part (2) and negative part (1)) with four posts (9a, 9b, 9c and 9d) in a view from above. The negative part (1) consist of four posts (9a, 9b, 9c and 9d), which are connected one another by way of four connectors which form the base body of the negative part.
[0172] FIG. 18 shows three different test pins (8a, 8b, 8c) that can be used in combination with the test bodies according to the invention. The test pin (8a) includes a step (7), which runs at an angle of 90° (herein always specified as an angle in degrees to the horizontal contact surface). Such a test pin is to be used if the channel (6) in the test body includes a corresponding step (7) with a 90° angle (inner angle; or 180° outer angle). The test pin (8b) has a tapering, which runs at an angle of 135°, and the test pin (8c) has a step of 160°. Both test pins can only applied if the channel (6) in the test body has a corresponding step.
[0173] FIG. 19 shows a dental implant system 1, including an implant 12 and a prosthetic component 13, as well as a fastening means 14, by way of which the prosthetic component 13 is fastened to the implant 12. In the shown example, the fastening means 14 is designed as a screw, which, e.g., engages into a fastening means recess 19 of the implant 12, which is designed as a screw thread. The prosthetic component here is only stylised and partly shown. Herein, it can be an abutment, a crown or an outer sleeve.
[0174] The prosthetic component 13, which is designed as an abutment in this example, includes a so-called jacket, thus an apically extending region which encompasses the implant 12 from the outside. Such a jacket can be used in order to define the gap between the implant 12 and the abutment 13 in a precise manner and to determine the degree of the over-capping. A computer implemented method according to the invention can be used to determine the optimal, vertical contouring 16 of the jacket 20 of the prosthetic component 13. This should be adapted to the situations in the mouth of the patient, e.g., gum edge and crown contour.
[0175] The horizontal contouring 17 is schematically shown in FIG. 20 and this is a further parameter that can be determined with the computer-implemented methods according to the invention. Added to this as parameters are the degree or length of the over-capping or push-over which can also vary in the periphery of the jacket 20, as is shown in FIG. 21.
[0176] A further important parameter is illustrated in the schematic drawing of FIG. 22. The computer-implemented method according to the invention can also serve for planning the intermediate space design 18 between the two adjacent teeth or tooth replacement structures. Herein, the distance 22 of correspondence points of adjacent structures, the height of the jawbone as well as the fashioning of the approximal surfaces 21 plays a role. The distance 22 may not fall below a critical minimum for shaping out harmonic soft tissue in the intermediate space (gingival papilla), since otherwise the hard tissue and soft tissue would be too greatly compressed. This compromising of the “biological width” inevitably leads to inflammation, possibly accompanied by the loss of tissue. If the distance 22 between adjacent structures increases, then there exits the risk of a very flat course of the soft tissue without papilla peaks, if the intermediate space 18 is not narrowed by a correspondingly protruding contour of the crowns. A suitable tightness of the intermediate space 18 is desirable since by way of this the soft tissue is laterally supported and can be pulled up to the contact point between the crowns of adjacent structures. The computer-implemented method ensures that the parameters which are necessary for the shaping of anatomical papillae (e.g., distance 22, bone height, contour of the crowns in the approximal region) are put in a suitable mutual relation to one another.
