阅读说明：本技术 用于牙颌畸形的具有分离工具导引装置/区段的骨定位装置 (Bone positioning device with separation tool guide/section for dentognathic deformities ) 是由 温格·斯文奈恩 弗兰克·雷诺尔 托比亚斯·沃尔夫勒姆 阿德姆·阿克苏 于 2018-07-12 设计创作，主要内容包括：本发明涉及一种应用于牙颌畸形的对骨区段相对彼此进行重新定位的骨定位装置(1),其具有基体(2),所述基体(2)具有朝向所述下颌(7)的底侧(3),在所述底侧(3)上设有用于容置固定于下颌的导航辅助件(6)的凹部(5),所述基体(2)还具有朝向所述上颌的相对的顶侧(4),在所述顶侧(4)上同样设有用于容置固定于上颌的导航辅助件(6)的凹部(5),其中在所述基体(2)上安装有至少一个分离工具导引装置(8)。(The invention relates to a bone positioning device (1) for repositioning bone segments relative to one another, which is used for dental deformities, having a base body (2), wherein the base body (2) has a bottom side (3) facing the lower jaw (7), wherein a recess (5) for receiving a navigation aid (6) fastened to the lower jaw is provided on the bottom side (3), wherein the base body (2) further has an opposite top side (4) facing the upper jaw, wherein a recess (5) for receiving a navigation aid (6) fastened to the upper jaw is also provided on the top side (4), and wherein at least one separating tool guide (8) is mounted on the base body (2).)

1. Bone positioning device (1) for repositioning bone segments relative to each other for application to a dental deformity, having a base body (2), the base body (2) having a bottom side (3) facing towards the lower jaw (7), on which bottom side (3) a recess (5) is provided for accommodating a navigation aid (6) fixed to the lower jaw, the base body (2) further having an opposite top side (4) facing towards the upper jaw, on which top side (4) a recess (5) is also provided for accommodating a navigation aid (6) fixed to the upper jaw, characterized in that at least one separating tool guide (8) is mounted on the base body (2).

2. Bone positioning device (1) according to claim 1, characterized in that the separation tool guide (8) protrudes outwards.

3. Bone positioning device (1) according to claim 1 or 2, characterized in that the distraction tool guide means (8) predetermines a path along which the distraction tool is forcibly guided.

4. Bone positioning device (1) according to claim 3, characterized in that the path is of a linear/straight or curved design.

5. The bone positioning device (1) according to claim 4, characterized in that the distraction tool guide device (8) has a horseshoe, U, C or L-shaped cross-section.

6. Bone positioning device (1) according to any of the claims 3 to 5, characterized in that a vector along a path transverse to an imaginary plane passes through the bottom side (3) and/or the top side (4) of the base body (2).

7. Bone positioning device (1) according to any of the claims 1 to 6, characterized in that two separate tool guides (8) are provided on both sides of the base body (2).

8. Bone positioning device (1) according to any of the claims 1 to 7, characterized in that the separation tool guide means (8) is integrally or detachably connected with the base body (2).

9. Bone positioning device (1) according to any of the claims 1 to 8, characterized in that a calibrated breaking point is provided between the separation tool guide (8) and the base body (2).

10. Bone positioning device (1) according to one of the claims 1 to 9, characterized in that an anti-wear insert is provided in the region of the planned separation tool device.

Technical Field

The present invention relates to a bone positioning device for repositioning bone segments relative to each other for application to a dental deformity.

Background

In this case, such bone segments are usually components of the upper jaw or lower jaw. In this case, the bone portion is separated from the remaining bone portion at the location where the separation tool performs the separation. The bone positioning device has a base body with a bottom side facing the lower jaw, on which a recess is provided for receiving a navigation aid (e.g. a tooth or gum segment) fixed to the lower jaw, and a top side facing the upper jaw, on which a recess is likewise provided for receiving a navigation aid (e.g. a tooth or gum segment) fixed to the upper jaw. Such bone positioning devices are also known to those skilled in the art as splints. Such splints or bone positioning devices are usually plastic splints used intraoperatively, i.e. during surgery, to connect the upper jaw with the lower jaw in order to fix the position of said upper and lower jaws, the bite sought and the position of the condylar/mandibular joint head. To move the mandible into the desired position, a sagittal osteotomy is typically performed. In this case, however, the separation takes place freely and unguided. This can unfortunately lead to inaccurate positioning profiles.

Disclosure of Invention

In this case, the object of the invention is to perform the operation faster, more successfully with hopes and more accurately. In particular, the disadvantages known from the prior art should also be eliminated. The solution to be proposed should be low cost, easy to use and capable of wide acceptance in the market.

The solution of the invention for achieving the above object is to use the same type of bone positioning device, in particular in that at least one separating tool guide is mounted on the base body for precisely guiding the separating tool along the desired positioning profile.

Therefore, lateral sawing guides are provided on the splint for the occlusion of the upper and lower jaw, which can be used in the field of dentognathic deformities. This makes it possible to carry out a sagittal cut with the aid of a milling cutter or another desired cutting tool. In this case, the cutting is accurate.

Advantageous embodiments reference is made to the dependent claims and these advantageous embodiments will be described in detail below.

Advantageously, the separating tool guide protrudes outwards and/or inwards. When a plurality of separation tool guides are employed, a specific number of separation tool guides may protrude outward and a specific number of separation tool guides may protrude inward. Preferably, however, all the separating tool guides project outwards or inwards. The separating tool guide should have a guide area which enables the insertion/mounting of a separating tool, such as a milling cutter or a saw, in order to make a gap of 1mm +/-20% thick. The milling cutter can be used to pass the direction through the splint and mark the osteotomy. In this case, the osteotomy is also performed with a milling cutter. The milling cutters may be the same milling cutter.

When the separating tool guide means presets a path, the separating tool (such as a milling cutter or a saw) is forcibly guided along the path, so that the movement or sliding of the separating tool is effectively prevented.

In order to be able to cut off these bones as quickly as possible, it is advantageous if the path is designed to be linear or curved, either completely or in sections, wherein alternatives to the curved design of the path are also possible, in particular in order to free up critical regions. The path may be of a linear design in sections and of a curved design in sections. When curved designs are employed, a constant curvature, gradually increasing or decreasing curvature, or a combination of these designs may be used.

Advantageously, the separation tool guide has a horseshoe, U, C or L-shaped cross section. In this case, the insertion of the tool is therefore guided in a plurality of spatial directions, preferably in three spatial directions. While open structures are always used in the case of horseshoe, U, C or L-shaped cross sections, it is also conceivable to use closed structures, for example in the form of hollow cylinders. In particular, hollow cylinders having polygonal, elliptical or even circular inner or outer contours can be used.

It is also advantageous if a vector along a path transverse to the imaginary plane passes through the top side and/or the bottom side of the base body.

An advantageous embodiment is also characterized in that two separate tool guides are arranged on both sides of the basic body. In this case, a complete separation of the mandibular region to be moved from the remaining mandible can be achieved quickly. The same applies to the upper jaw. For production, it is advantageous if the separating tool guide is integrally/integrally formed/connected to the base body in the same material or detachably connected to the base body in a substantially form-and/or force-fitting manner. In the first case, a complete tool can be produced which does not require further preparation, while in the second case better operability is achieved.

When a weak point is provided/formed between the separation tool guide and the base body, further possibilities of use arise during surgery.

It is also advantageous if a base, for example a quadrangular base, is provided on the base body, into which diametrically opposite receptacles on/in the separating tool guide are inserted/matched.

Advantageously, a wear insert is provided in the region of the planned separation tool device. Thereby improving the accuracy of use during surgery.

It is also advantageous if the wear protection is made of a harder material than the base body or the rest of the separating tool guide, at least on the surface/on a section of the surface.

An advantageous embodiment is also characterized in that the wear-resistant insert is clamped or glued into/onto the separating tool guide or the base body.

Finally, the invention also relates to the use of the bone positioning device such that the distraction tool guide functions as a sliding plate.

The invention can also be modified in that a resin/silicone and/or similar material is used for the base body and/or the separating tool guide. Wherein additive/additive manufacturing methods may be used.

The surface of the separation tool guide facing the separation tool may be constructed in the form of a step or a right angle or comprise the step/right angle. The orientation of the separation tool guide, in particular the orientation of the vector corresponding to the described path, is determined in the framework of the virtual planning. Thus, the orientation has been predetermined during the virtual planning.

By way of background, it is also noted herein that a plurality of bone positioning devices are typically used. In the case of a defective bone position during surgery, so-called actual state splints are often used. The invention relates to the actual state splint. The intermediate clamping plate used subsequently or the final clamping plate used subsequently can be produced in exactly the same manner, but usually in a different manner, since no milling or separating process is required here. Therefore, a separation tool guide may be absent in the intermediate splint or the final splint.

Drawings

Fig. 1 shows a bone positioning device 1 according to the invention from the front and above.

Detailed Description

Advantageous embodiments reference is made to the dependent claims and these advantageous embodiments will be described in detail below.

Fig. 1 in its entirety shows a front perspective view of a bone positioning device/actual splint according to the invention in the inserted state into the mandibular teeth. Furthermore, it is possible to combine the bone positioning device with that separation tool guide not only with the actual state splint, but also with the respective temporary intermediate splint or final splint. In the individual steps of osteotomy, different splint variants reflect different positions of the jawbone fragments. The final bite is gradually and actively adjusted with the aid of the osteotomy.

The drawings are merely schematic in nature and are used for understanding the present invention.

Fig. 1 shows a bone positioning device 1 according to the invention from the front and above.

The bone positioning device 1 shown in fig. 1 has a base body 2 comprising a bottom side 3 and a top side 4. Recesses 5 are provided to accommodate the teeth. These recesses 5 exactly match the teeth in their geometry. In this case, these teeth serve as navigation aids 6. The individual teeth are for example grown/fixed in the lower jaw 7. Of course, the dental implant can also be used as a navigation aid 6.

On both sides of the base body 2, a separating tool guide 8 projects outwards. The separating tool guide 8 has an inner side 9, on which inner side 9 a contact surface 10 for a separating tool (e.g. a milling cutter or a saw), not shown, is formed. This contact surface 10 may be harder than the interior of the base body 2 and/or the separating tool guide 8. The separating tool guide 8 extends in a straight line in the direction of the lower jaw 7 obliquely rearward along a vector not shown. The cutting of the cutting tool is preset so as to sever the lower jaw 7.

List of reference numerals

1 bone positioning device/actual state splint

2 base body

3 bottom side

4 top side

5 concave part

6 navigation aid

7 lower jaw

8 separating tool guiding device

9 inner side

10 contact surface