DE4218220A1 - Planning guide for inserting dental implants - has sheet with illustrations of implants which can be cut out and placed on illustration of patient's jaw - Google Patents

Abstract

An aid for planning the placing of an implant in a patient's jaw, consists of a first sheet (4) which carries illustrations of different types of implants. The illustration of the required implant is cut out of this first sheet and placed in position in a diagram (3) of the patient's jaw depicted on a second sheet (5). The illustrations of the implants carry identification numbers so that the selected implant is easily described. The implants are intended for the fitting of dental prostheses in the patient's jaw. ADVANTAGE - The method ensures that the most suitable implant is selected.

Description

The present invention relates to a planning aid for the selection of bone implants, e.g. B. Jaw implants for dentures, the planning aid consisting of a film with illustrations of the Implant.

The present invention thus relates to the field of Im introduced into the bone implant bodies from the fields of orthopedics, trauma surgery and dental implantology, especially preoperative planning and its documentation.  

Basic determination, determination of indications and preoperative position determination of bones today, implants are essentially determined by conventional x-ray diagnostics, in rare cases supported by digital imaging techniques (e.g. computed tomography). Here, through time-consuming planning work on the X-ray image, if necessary on transparent paper, the desirable implant shape and their position. This also serves to document the planning effort and their archiving and patient advice. Only a few implant manufacturers, mainly in dental field, offer graphic images on transparent foils to the To facilitate the selection of the implant type. But then there is also a manual one Drawing transfer required in individual cases for documentation.

Since the human anatomy is subject to a very wide range of variation, bones have to As a rule, implants are selected and adapted individually. On the one hand, it is possible an implant after prior preparation of the bone using one of the bones and to make the impression of the surrounding tissue individually, which is very is complex and difficult. For implants that are used in medical practice have been widely adopted by the medical device industry prefabricated implants or implant parts kept ready, it being understood that because of the mentioned different anatomy of people these prefabricated implants in very Many different sizes and types need to be available for each patient optimally fitting implant can be selected, a custom-made one Implant comes very close and is functionally in no way inferior.

The well-known planning aids mentioned above, partly on paper and partly on film printed representations (sectional views and / or views from different sides) of the Implants are included by the attending physician for comparison with a representation of the of the respective bone in which the implant is to be inserted. A careful planning of the implant generally also starts with the representation of the implant ahead of the space in the bone. These planning documents then serve the Doctor during the treatment as a guide and control in the preparation of the bone and also when inserting the implant. Such planning aids find practical applications especially in dental and maxillofacial surgery, but also, for example, when replacing worn out ones Joints through artificial joints or when treating complicated fractures.

These planning documents are also important documentation material for any later ones Post-treatments and can also play a significant role in creating  Expert opinion on medical treatment.

In practice, the creation of planning documents proving the above Conditions are said to be relatively difficult and time consuming. In general, the treating doctor a representation of the selected implant by hand in a representation of the bone, with of course also different sectional or side views are taken into account.

The present invention is therefore based on the object of a planning aid at the beginning to create the type mentioned, through which the creation of meaningful planning documents can be considerably simplified and accelerated.

This object is achieved in that the implant representations can be separated from the film and preferably self-adhesive on a planning document, e.g. B. one the bones for which that Implant is intended, imaging x-ray, is attachable. This eliminates the tedious Transfer by hand by drawing the implant in a bone representation. Furthermore is the representation of the implant directly in the printed form in the bone image transmitted, so that also transmission errors that easily occur when drawing by hand can be excluded.

Here, preoperative implant planning and a true-to-scale position simulation including their documentation can be achieved.

In the preferred embodiment, the implant representations are like decals attached to a foil. The adhesive layer of these decals should be useful be such that the decals, for example from an X-ray film, can also be used again release and glue again, for example to correct a poorly chosen position to be able to. At the same time, the adhesive layer should also be such that it is glued on Decal ultimately keeps permanently on the planning documents. If necessary, that can Decal can also be provided with two adhesive layers separated by a protective film which the outer adhesive layer is easily removable and keeps the decal on the film and also re-glued several times to try out the correct position on an x-ray can, while after peeling off the protective film, a second, better adhering adhesive layer is exposed, with which the decal is then finally on the x-ray or one another representation of the bone is applied.  

Instead of the design as a decal, the representations can also, for. B. by tearing open a perforation can be separated from the film.

Such an embodiment of the invention is preferred, in which different sizes the same implant on a film together, preferably graded next to each other are shown, the film should also be transparent if possible. Man can then by placing the film on the planning documents by moving the film Match the appropriate implant representation with the bone provided and then pull this representation off the film and stick it on the planning document. It is also useful if not only different sizes, but also different types of implants are shown on one and the same film. The size and The form of the representations need not necessarily be the natural shape and size of the Implants correspond, but in particular can also be any enlargements and Distortion caused by the imaging of the bone, so that, for example, the on the X-ray film glued on gives exactly the same overall picture as one X-ray of the implant placed in or on the bone.

This is the well-known, type-dependent and setting-dependent imaging scale (Projection error) of the x-ray image taken into account.

It is also expedient if each of the representations is printed by a corresponding identifier is clearly identified by type and size, so that one too size and type of implant for copies of the planning documents that are not to scale can identify at any time.

The preferably transparent films on which the representations of the implants in the form of Decals are shown, expediently have a second imprint, the at least outlines the implant and also the identification mark in question wearing. With a film from which one or more decals have already been removed, you can at least by hanging on the planning documents you can still see whether one of the missing Decals represent the implant of choice or whether on a different film if necessary shown implants fit better by type and size.

However, the imprint that remains permanently on the film should clearly differ from the imprint the decal must be different, so that the impression is not given when the film is almost used is awakened to be all or many implant representations in the form of decals  present on this slide.

Features and possible uses of the invention result from the following Description of preferred embodiments and the associated figures. Show it:

Fig. 1 is a film with a plurality implant representations in the form of decals,

FIG. 2 shows a decal taken from the film according to FIG. 1, which shows an implant in a bone on an X-ray image.

In Fig. 1 is exemplary and only schematically illustrated a series of transfers, illustrating various types of jaw implants in five different sizes. Of course, in addition to the two types shown, there are also various other types of dental implants, and the size gradation shown can be made much finer and more extensive in practice.

One can see from the decals 1 , 2 four decals of different sizes that are still present as well as only the outlines and an identification number of a decal that has already been removed in this row. The ID numbers are simplified here e.g. B. selected as A3 and A2, the letters A, B,. . . characterize the different types and the number is a size designation for the implant.

The implants themselves should also have the type and size indicated on their surface, if necessary, also wear on a transparent film that can be stuck on with the decal itself, such as B. indicated for the decal with the designation A2.

FIG. 2 schematically shows an X-ray image 5 of a lower jaw bone 3 , the bone contours emerging in the X-ray image being shown here with the aid of solid lines and additionally showing the bone in a section. For the planning of a fixed or removable denture that would not find sufficient support on any teeth that are still present, the implant A3 for the lower jaw 3 is (among other things) provided. This has simply been peeled off in the form of decals from a film 4 shown by way of example in FIG. 1 and glued into the X-ray image 5 . The series of decals is expediently enlarged in relation to the actual size of the implants A3 by a factor which also corresponds to the magnification factor of the x-ray image. The implants glued into the x-ray image therefore correctly reflect the relative proportions, so that FIG. 2 also corresponds to an x-ray image of the same jaw with the original implant A3 inserted.

The decals 1 , 2 can e.g. B. consist of a printed film, the part to be peeled off and glued on may be slightly larger than the printed area, e.g. B. can form a circumferential hem, a hanging flag or a larger, simply rectangular area that is available for labeling with the type and size designation, such as by the labels "A3" or "A2" printed on the edge of the glued-in implants "or the like is clarified.

Such labeling is of course not absolutely necessary, it can also be opened the imprint of the implants itself or be completely omitted.

The corresponding designation can also be seen in FIG. 1 on the empty space of the removed decal, so that the user always has an overview of which decals have already been used for other plans. The decals are expediently attached to a transparent film, so that this transparent film can also be placed on an X-ray image or another planning document and the suitable size can be selected even if the decal in question has already been removed, since, according to FIG. 1 the contours of the decals removed can still be seen.

With the decals according to the invention, the planning of dental implants succeeds significantly simpler, cleaner, faster and clearer than what was sometimes tedious Sign off. Subsequent changes to the planning, i.e. H. Exchange or transfer of the Decals are possible at any time, if not after the planning has been completed are permanently glued.

Claims (10)

1. Planning aid for the selection of bone implants, e.g. B. for jaw bones, consisting of a film with representations of the implant, characterized in that the representations were separable from the film and were preferably self-adhesive on a planning sub, z. B. one of the bones for which the implant is intended, X-ray imaging, can be attached. 2. Planning aid according to claim 1, characterized in that the implant positions in the form of decals are attached to the film. 3. Planning aid according to claim 1, characterized in that the implant positions can be separated from the film by tearing a perforation. 4. Planning aid according to one of claims 1 to 3, characterized in that a Adhesive layer on the implant representation is covered by a protective film. 5. Planning aid according to one of claims 1 to 4, characterized in that different sizes of the same implant type are shown together on one slide. 6. Planning aid according to one of claims 1 to 5, characterized in that different types of the same implant are shown together on a slide. 7. Planning aid according to one of claims 1 to 6, characterized in that the Foils are transparent. 8. Planning aid according to one of claims 1 to 7, characterized in that the Implant representations are transparent. 9. Planning aid according to one of claims 1 to 8, characterized in that the Another representation of the same implant under or above the separable representation which is easily distinguishable from the representation to be removed. 10. Planning aid according to one of claims 1 to 9, characterized in that each Representation of an implant a clearly recognizable identification of the type and size of the Has implant.