Auxiliary shaping and fixing device for absorbable plate after sagittal splitting of mandibular ramus

Abstract

The invention discloses a device for assisting shaping and fixing of an absorbable plate after sagittal splitting of mandibular ramus, and relates to the technical field of auxiliary equipment for sagittal splitting of mandibular ramus osteotomy, the device comprises a shaping frame and a fixing frame, the shaping frame and the fixing frame are connected through a connecting piece, and a plurality of nail holes are formed in each of the shaping frame and the fixing frame. The fixing frame can play a role in temporarily stabilizing free bone blocks, and meanwhile, the shaping frame can assist the absorbable plate in rapid and accurate shaping.

Description

Technical Field

[0001] The invention relates to the technical field of mandibular ramus sagittal split osteotomy auxiliary equipment, in particular to an absorbable plate shaping and fixing device for assisting mandibular ramus sagittal splitting. Background Art

[0002] For the correction of overbite in oral and jaw surgery, the previous internal fixation method basically used titanium alloy metal plates. This metal plate has good repeated bending properties and high strength. It is used for internal fixation of the mandibular ramus fracture after splitting the bone fragment to assist the healing of the fractured bone. However, since titanium metal fixation requires a second surgery to remove the titanium alloy plate, domestically produced absorbable craniomaxillofacial fixation plate systems have gradually appeared on the market.

[0003] The shape of the existing absorbable plate is basically the same as that of the titanium alloy plate. However, when the occlusal relationship is not satisfactory during surgical fixation, the doctor needs to repeatedly adjust the position and shape of the external fixation device. Since the absorbable plate cannot be bent multiple times, it cannot be used directly in the sagittal splitting of the mandibular ramus. In addition, after multiple implantations and removals of the absorbable nails, the absorbable nails will be fixed loosely due to the expansion of the hole diameter. Therefore, an auxiliary fixation device is needed to enable the doctor to observe the intraoperative occlusal status without bending the absorbable plate in advance or drilling the absorbable nails. The shaping frame of the device is detachable, and the disassembled shaping frame can be taken out of the body to assist in the bending of the absorbable plate without affecting the fixation of the free bone blocks.

[0004] Therefore, there is an urgent need in the art for an absorbable plate shaping and fixation device to assist in sagittal splitting of the mandibular ramus, so as to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a device for assisting in shaping and fixing an absorbable plate after sagittal splitting of the mandibular ramus, so as to solve the problems existing in the above-mentioned prior art, utilize a fixing frame to maintain the fixed state of the free bone block, and utilize a shaping frame to achieve rapid and accurate shaping of the absorbable plate.

[0006] To achieve the above object, the present invention provides the following solutions: The present invention discloses a device for shaping and fixing an absorbable plate after assisting in sagittal splitting of the mandibular ramus. The device is characterized in that: it comprises a shaping frame and a fixing frame, the shaping frame and the fixing frame are connected by a connecting piece, and a plurality of nail holes are provided on the shaping frame and the fixing frame; The shaping frame, the fixing frame and the connecting piece are all made of metal; The fixing frame and the shaping frame are fixed on the bone surface by tapping screws; the tapping screws are stainless steel nails or titanium nails; The shaping frame is a straight-line structure, and four nail holes are arranged at intervals on the shaping frame; The fixed frame is a straight-line structure, with a nail hole provided at each end of the fixed frame, the fixed frame and the shaping frame are connected by two connecting pieces, and the two ends of the fixed frame are bent in the direction away from the shaping frame; or, the fixed frame is a hook-shaped structure, with three nail holes provided on the fixed frame, the shaping frame is arranged in the middle of the fixed frame, and the two sides of the shaping frame are connected to the two sides of the fixed frame by one of the connecting pieces respectively; or, the fixed frame is a U-shaped structure, with three nail holes provided on the fixed frame, the shaping frame is arranged in the middle of the fixed frame, and the two sides of the shaping frame are connected to the two sides of the fixed frame by one of the connecting pieces respectively.

[0007] Compared with the prior art, the present invention has achieved the following technical effects: The present invention is based on practical clinical applications. The stabilizing effect of the fixing frame can ensure the stability of temporary fixation, allowing the physician to freely observe the facial appearance during temporary fixation. Furthermore, the metal-assisted absorbable plate shaping and fixing device after sagittal splitting of the mandibular ramus has good bendability, and the position can be repeatedly adjusted to fix the bone block until it is satisfactory. The detachable form of the shaping frame allows the absorbable plate to be bent externally into the desired shape while the mesiodistal bone block of the mandibular ramus remains in the proper position. After being bent and formed, it is fixed on the bone block at one time. By guiding the fixation of the absorbable plate through the shaping and fixing device of the absorbable plate after sagittal splitting of the mandibular ramus, secondary surgery after titanium metal fixation can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 This is a schematic diagram of the structure of the absorbable plate shaping and fixation device for assisting the sagittal splitting of the mandibular ramus according to Example 1; Figure 2 This is a schematic diagram of the structure of the absorbable plate shaping and fixation device for assisting the sagittal splitting of the mandibular ramus according to Example 2; Figure 3 This is a schematic diagram of the structure of the absorbable plate shaping and fixation device for assisting the sagittal splitting of the mandibular ramus according to Example 3; Figure 4 The fixing frame in the fixed state in step 2 of the method for shaping and fixing the absorbable plate after assisting the sagittal splitting of the mandibular ramus in embodiment 4; Figure 5 This is a front view of the shaping frame removed in step 2 of the method for shaping and fixing the absorbable plate after assisting the sagittal splitting of the mandibular ramus in Example 3; Figure 6 It is a side view of the shaping frame taken out in step 2 of the method for shaping and fixing the absorbable plate after assisting the sagittal splitting of the mandibular ramus in Example 3; Figure 7 This is a schematic diagram of step 3 in the method for shaping and fixing an absorbable plate after assisting sagittal splitting of the mandibular ramus in Example 3; Figure 8 This is a schematic diagram of step 4 in the method for shaping and fixing an absorbable plate after assisting sagittal splitting of the mandibular ramus in Example 3; In the figure: 1-shaping frame; 2-fixing frame; 3-connecting piece. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] The purpose of the present invention is to provide a device for assisting in shaping and fixing an absorbable plate after sagittal splitting of the mandibular ramus, so as to solve the problems existing in the above-mentioned prior art, utilize a fixing frame to maintain the fixed state of the free bone block, and utilize a shaping frame to achieve rapid and accurate shaping of the absorbable plate.

[0012] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] Embodiment 1 like Figure 1 As shown, the present invention provides an absorbable plate shaping and fixation device for assisting in sagittal splitting of the mandibular ramus, comprising a shaping frame 1 and a fixing frame 2. The shaping frame 1 and the fixing frame 2 are connected by a connecting piece 3. The shaping frame 1 and the fixing frame 2 are both provided with a plurality of integrally arranged nail holes. It should be noted that one, multiple (two or more) or all of the nail holes on the fixing frame 2 can be set as elliptical or elongated holes, the purpose of which is to facilitate the adjustment of the position between the two bone blocks.

[0014] The shaping frame 1, the fixing frame 2 and the connecting piece 3 are all made of metal, including but not limited to stainless steel, wherein the shaping frame 1 and the fixing frame 2 can be bent and deformed to a certain extent, and the nail holes on the shaping frame 1 and the fixing frame 2 are integrally formed. The connecting piece 3 is cut to minimize its diameter so that it forms a structure that can be broken by external force, and in actual application, it can be easily cut off by common surgical forceps.

[0015] The fixing frame 2 and the shaping frame 1 are fixed to the bone surface by tapping screws. The tapping screws not only fix the fixing frame 2 and the shaping frame 1, but also tap the bone surface to form screw holes for the subsequent installation of absorbable screws.

[0016] Furthermore, the tapping screws include but are not limited to existing stainless steel nails or titanium nails.

[0017] The shaping frame 1 is a straight-line structure, and four nail holes are arranged at intervals on the shaping frame 1.

[0018] like Figure 1 As shown, the fixing frame 2 is a straight-line structure, and a nail hole is provided at each end of the fixing frame 2. This type of fixing frame 2 is suitable for situations where absorbable screws are easy to insert. The fixing frame 2 is connected to the shaping frame 1 through two connecting members 3. The fixing frame 2 and the shaping frame 1 can be arranged parallel to each other (as shown in FIG. Figure 1 Alternatively, both ends of the fixing frame 2 are bent away from the shaping frame 1, so that the setting can better adapt to the anatomical shape of the front edge of the mandibular ramus.

[0019] In actual use, first attach the absorbable plate shaping and fixing device to the bone surface after the sagittal splitting of the auxiliary mandibular ramus, and bend it to a certain extent. Then use screws to fix the fixed frame 2, and remove the shaping frame 1. The shaped shaping frame 1 is overlapped with the absorbable plate and placed in hot water, and the shape of the shaping frame 1 is used to assist the shaping of the absorbable plate. The shaped absorbable plate is fixed to the position of the original shaping frame 1 on the bone surface by absorbable nails. After the absorbable plate is successfully fixed and the tail end of the screw on the fixed frame 2 is removed, the fixed frame 2 is removed, and the auxiliary fixation is completed.

[0020] Embodiment 2 like Figure 2 As shown, this embodiment provides an absorbable plate shaping and fixation device for assisting the sagittal splitting of the mandibular ramus. The technical features of this embodiment are basically the same as those disclosed in the first embodiment, except that: In this embodiment, the fixed frame 2 is a hook-shaped structure, specifically including a long side and a short side, and the same end of the long side and the short side is connected by an arc side. The fixed frame 2 is provided with three nail holes, one of which is provided at the free end of the long side, and the other two nail holes are respectively provided at a corresponding position of the long side and the opposite side. The shaping frame 1 is provided in the middle of the fixed frame 2 (i.e., between the long side and the short side), and the two sides of the shaping frame 1 are respectively connected to the two sides of the fixed frame 2 by a connecting member 3.

[0021] Embodiment 3 like Figure 3 As shown, this embodiment provides an absorbable plate shaping and fixation device for assisting the sagittal splitting of the mandibular ramus. The technical features of this embodiment are basically the same as those disclosed in the first embodiment, except that: In this embodiment, the fixed frame 2 is a U-shaped structure, and three nail holes are provided on the fixed frame 2. Two free ends of the U-shaped structure are respectively provided with a nail hole, and one of the sides is also provided with a nail hole. The shaping frame 1 is arranged in the middle of the fixed frame 2 (i.e., between the two sides), and the two sides of the shaping frame 1 are respectively connected to the two sides of the fixed frame 2 through a connecting member 3.

[0022] Embodiment 4 like Figure 4-Figure 8 As shown, this embodiment provides a method for shaping and fixing an absorbable plate after assisting the sagittal splitting of the mandibular ramus, based on the device for shaping and fixing an absorbable plate after assisting the sagittal splitting of the mandibular ramus in Embodiments 1 to 3, comprising the following steps: Step 1: Select an absorbable plate shaping and fixing device of a suitable shape to assist in sagittal splitting of the mandibular ramus. Any one of Embodiments 1 to 3 may be selected. This embodiment is described by taking Embodiment 3 as an example.

[0023] Step 2: After the sagittal splitting of the mandibular ramus, the absorbable plate shaping and fixing device is bent and made to fit the bone surface, and the fixing frame 2 and the shaping frame 1 are fixed to the bone surface by tapping screws. During the fixation process, the tapping screws can tap on the bone surface to form corresponding screw holes, and observe the occlusal state. Figure 3 The left nail hole in the embodiment is an elliptical hole or a long hole. When installing the tapping screw, the tapping screw on the left elliptical or long nail hole can be loosened first, and the two tapping screws on the right can be tightened directly. Since the left tapping screw and the corresponding elliptical or long nail hole are not tightened, the bone surface on the left can be displaced by a small distance, thereby adjusting the positional relationship between the two bone surfaces. When the positional relationship between the two bone surfaces reaches the expected position, tighten the tapping screw on the left. Then use surgical forceps to cut off the connector 3 and remove the shaping frame 1.

[0024] Step 3: Overlap the shaping frame 1 and the absorbent plate and place them together in hot water to shape the absorbent plate.

[0025] Step 4: Fix the absorbable plate to the corresponding screw holes of the shaping frame 1 through absorbable screws. The advantage of this arrangement is that there is no need to re-tap when installing the absorbable plate. After fixing the absorbable plate, remove the tail end of the absorbable screw and then remove the fixing frame 2.

[0026] In this embodiment, the temperature of the hot water in step 3 is 70°C-85°C, and the absorbable plate is shaped using the shaping frame 1 as a template at a temperature of 70°C-85°C. Furthermore, the absorbable plate and the absorbable screw are both made of poly-L-lactic acid, and no secondary surgery is required for removal at a later stage.

[0027] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A device for shaping and fixing an absorbable plate after sagittal splitting of the mandibular ramus, characterized in that: It includes a shaping frame and a fixing frame, wherein the shaping frame and the fixing frame are connected via a connecting piece, and a plurality of nail holes are provided on the shaping frame and the fixing frame; The shaping frame, the fixing frame and the connecting piece are all made of metal; The fixing frame and the shaping frame are fixed on the bone surface by tapping screws; the tapping screws are stainless steel nails or titanium nails; The shaping frame is a straight-line structure, and four nail holes are arranged at intervals on the shaping frame; The fixed frame is a straight-line structure, with a nail hole provided at each end of the fixed frame, the fixed frame and the shaping frame are connected by two connecting pieces, and the two ends of the fixed frame are bent in the direction away from the shaping frame; or, the fixed frame is a hook-shaped structure, with three nail holes provided on the fixed frame, the shaping frame is arranged in the middle of the fixed frame, and the two sides of the shaping frame are connected to the two sides of the fixed frame by one of the connecting pieces respectively; or, the fixed frame is a U-shaped structure, with three nail holes provided on the fixed frame, the shaping frame is arranged in the middle of the fixed frame, and the two sides of the shaping frame are connected to the two sides of the fixed frame by one of the connecting pieces respectively.

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