Navigation positioning guide plate for guiding butterfly wing process separation operation

Abstract

The utility model discloses a navigational positioning guide plate for guiding a butterfly wing process separation operation. The navigational positioning guide plate comprises a fitting part, a fixing nail hole and a navigational channel, the fitting part is matched with the anatomical form of the outer surface of the cheekbone, and more than two fixing nail holes are formed in the fitting part and used for fixing the guide plate; the navigation channel is of a cavity structure extending out of the attaching part, the axis of the navigation channel accurately points to a preset osteotomy plane at the root of the wing process of the butterfly bone, and accurate operation of the osteotome is guided. Through personalized adaptation, accurate guiding and stable fixing, the problems of inaccurate positioning, high operation risk, multiple postoperative complications and the like in a traditional operation are solved. The method has the advantages that accurate positioning is achieved, and the risk of vascular and craniocerebral injury is reduced; the probability of complete resection of a focus is increased, and thoroughness of an operation is ensured; the adaptability is high, and the method is suitable for complex anatomical variation cases; the operation safety, accuracy and efficiency are remarkably improved, and the method has important clinical application value.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the oral and maxillofacial surgery surgical instrument technical field, concretely relates to a navigation positioning guide plate for guiding sphenoid ala disarticulation operation. BACKGROUND

[0002] Sphenoid ala disarticulation is a key step in oral and maxillofacial surgery, and is widely used in oral cancer and other operations involving sphenoid ala, lesion destruction of the posterior lateral wall of the maxillary sinus and invasion of the temporal fossa and other such operations requiring sphenoid ala resection. However, the traditional surgical method has the following outstanding problems: (1) inaccurate positioning: traditional sphenoid ala disarticulation relies on the experience of the operator to operate manually, lacks precise positioning tools, and it is difficult to accurately determine the sphenoid ala root osteotomy position during the operation, which can easily cause the osteotomy line to deviate. (2) deviation of bone gouging angle: due to the complex anatomical structure of the sphenoid ala (such as the inclination angle and thickness variation), it is difficult for the operator to control the bone gouging angle by hand feeling, which can easily cause the osteotomy surface to be uneven or excessive bone gouging. (3) risk of blood vessel and brain injury: the anatomical structure around the sphenoid ala is complex, and is adjacent to important structures (such as the internal carotid artery and the brain), and careless operation during the operation can easily cause massive bleeding or brain injury, which can seriously endanger the patient's life. (4) difficulty in overall lesion resection: the traditional method cannot accurately resect the ala, and often requires the use of bone nippers or bone scissors to resect the ala after lesion resection, which can cause the lesion to be unable to be resected in its entirety, affecting the thoroughness of the operation.

[0003] At the same time, the existing guide plate design also has the following limitations: (1) limited application site: most of the osteotomy guide plates on the market are designed for alveolar bone or mandible, and their fixation methods and guiding structures cannot adapt to the anatomical characteristics of the sphenoid ala. (2) lack of personalized design: most existing guide plates are standardized products and cannot be customized according to individual anatomical differences (such as sphenoid ala length, inclination angle and zygomatic shape), which can cause poor adaptability during the operation. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a navigation positioning guide plate for guiding sphenoid ala disarticulation operation, which solves the problems of inaccurate positioning, high operation risk and many postoperative complications in traditional surgery through personalized design, stable fixation and precise guidance, and improves the safety and accuracy of the operation.

[0005] The utility model is implemented through the following technical solutions:

[0006] A navigation positioning guide plate for guiding sphenoid ala disarticulation operation, comprising:

[0007] A fitting part that matches the anatomical form of the external surface of the zygoma, and is in contact with and fixed to the zygoma;

[0008] The fitting part is provided with two or more than two fixing nail holes;

[0009] The navigation channel is a cavity structure extending from the fitting part, and an axis of the navigation channel points to a predetermined osteotomy plane of a sphenoid pterygoid process root.

[0010] Preferably, a hole direction of the fixing nail hole is perpendicular to a zygomatic bone surface.

[0011] Preferably, an inner diameter of the navigation channel is matched with the size of the adaptive osteotome.

[0012] Preferably, a material of the guide plate is a medical-grade acrylic resin.

[0013] Preferably, an edge of the fitting part is provided with an elastic clamping structure for assisting in fixing the guide plate.

[0014] Preferably, an inner wall of the navigation channel is provided with an anti-skid pattern.

[0015] The guide plate has the following beneficial effects:

[0016] (1) Precise positioning, reducing the risk of surgery: the guide plate of the utility model is designed based on CT data of a patient, and the fitting part of the guide plate is perfectly fitted with an external surface of a zygomatic bone, so that accurate positioning in surgery is ensured, and the error of an osteotomy line is less than 1 mm; the navigation channel accurately guides the angle of the osteotome, and avoids the problem of uneven osteotomy surface or excessive bone chiseling caused by angle deviation in traditional surgery.

[0017] (2) Effectively avoiding blood vessel and brain injury: the anatomical structure around the sphenoid pterygoid process is complex, and is adjacent to important structures (such as an internal carotid artery and a brain), and careless operation in surgery easily leads to massive hemorrhage or brain injury; the guide plate of the utility model can accurately determine the direction and depth of the osteotome, and effectively avoids the risk of major blood vessel and brain injury.

[0018] (3) Improving the thoroughness of surgical resection of lesions: the traditional method cannot accurately remove the sphenoid pterygoid process, and often needs to use bone nippers or bone scissors to remove the sphenoid pterygoid process after lesion resection, which causes the lesion to be unable to be completely removed, and affects the thoroughness of the surgery; the guide plate of the utility model can completely and accurately remove the sphenoid pterygoid process that needs to be removed, improves the probability of completely removing the lesion, and increases the thoroughness of the surgery.

[0019] (4) Strong adaptability, wide application range: the guide plate of the utility model can be customized according to the anatomical characteristics of the zygomatic bone and the sphenoid pterygoid process of a patient, and the fixing nail hole structure of the fitting part further enhances the stability of the guide plate, and is suitable for complex anatomical variation cases.

[0020] (5) Reduce postoperative complications: the guide plate can accurately cut bone to reduce residual or excessive resection of the sphenoid ala, reduce the incidence of postoperative bite dysfunction, facial asymmetry and other complications; high stability during operation, reducing the risk of postoperative bone healing.

[0021] (6) Improve surgical safety: the guide plate of the utility model is fixed by elastic clamping and fixing nail hole double, which can minimize the displacement of the guide plate during operation, avoid the operation error caused by the displacement of the guide plate in traditional operation; the anti-skid design of the inner wall of the navigation channel further reduces the shaking of the bone chisel, ensuring the stability of the operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view of a navigation positioning guide plate for guiding sphenoid ala disconnection surgery.

[0023] Figure 2 It is a left view of a navigation positioning guide plate for guiding sphenoid ala disconnection surgery.

[0024] In the figure: 1, the fitting part; 2, the fixed nail hole; 3, the navigation channel. DETAILED DESCRIPTION

[0025] The utility model will be further described in detail below in combination with the drawings and specific examples.

[0026] Example 1

[0027] A navigation positioning guide plate for guiding sphenoid ala disconnection surgery, through the cooperative design of zygomatic bone adaptive structure and navigation channel, the precise guidance of sphenoid ala disconnection surgery is realized, as shown in Figure 1 、 2 , containing fitting part 1, fixed nail hole 2 and navigation channel 3.

[0028] The fitting part 1 includes an anatomic adaptive curved surface matched with the anatomic morphology of the outer surface of the zygomatic bone, and a fixing structure in contact with the zygomatic bone and fixed thereon, specifically as follows:

[0029] (1) Anatomic adaptive curved surface

[0030] Based on the three-dimensional morphology of the outer surface of the zygomatic bone reconstructed from the CT data of the patient, a personalized curved surface is prepared by using 3D printing technology to ensure stable fitting.

[0031] (2) Fixing structure

[0032] 2-3 fixed nail holes 2 are arranged on the fitting part 1, the hole direction is perpendicular to the zygomatic bone surface, which is used for fixing the guide plate.

[0033] A preferred scheme, the edge of the fitting part 1 is provided with an elastic clamping arm for assisting in fixing the guide plate.

[0034] The navigation channel 3 is a cavity structure extending from the fitting part 1, including a guide tube / slot, the inner diameter of which matches the size of the bone chisel (tolerance ±0.2mm), and the axis of the navigation channel 3 points to the predetermined osteotomy line at the root of the sphenoid wing.

[0035] In a preferred scheme, anti-skid lines can be optionally arranged on the inner wall of the navigation channel 3 to reduce shaking during the operation of the bone chisel and increase the stability of the bone chisel.

[0036] The required depth of the bone chisel can be measured and marked before the operation, and the navigation channel 3 is designed according to the mark to avoid excessive depth of the bone chisel and damage to other structures of the patient.

[0037] Example 2

[0038] The navigation positioning guide plate for guiding the sphenoid wing off-cut operation described in Example 1 is used for actual operation, and the radical operation of the above gingival cancer is taken as an example, and the specific operation process is as follows:

[0039] (1) Preoperative planning

[0040] The CT data of the patient's maxillofacial part is obtained, and the three-dimensional reconstruction is performed on the mimics software. The sphenoid wing osteotomy line is determined in communication with the operator. The width of the sphenoid wing is measured, the bone chisel with a width equal to or slightly larger than the width of the sphenoid wing is selected, and the bone chisel is scanned into the software. The direction, angle and depth of the bone chisel are arranged in the software. At this time, the required depth for completely chiseling off the sphenoid wing can be measured. On this basis, the navigation channel 3 of the guide plate is designed according to the size of the bone chisel, and the fitting part 1 of the guide plate is designed according to the curve and curvature of the malar bone. Two or more than two fixation nail holes 2 are designed on the fitting part 1. The 3D printing file is generated, and the guide plate is prepared by 3D printing technology.

[0041] (2) Intraoperative operation

[0042] Expose the malar bone area, place the fitting part 1 in the predetermined position, then drill titanium nails through the fixation nail holes 2 on the malar bone, and firmly fix the guide plate on the malar bone of the patient. Then insert the bone chisel into the navigation channel 3, and push the bone chisel along the navigation channel 3 to the required depth for completely chiseling off the sphenoid wing, and complete the wing off-cut operation.

[0043] (3) After the operation is completed, the surgical area is flushed, and the guide plate is removed.

[0044] The above-described embodiments are only some embodiments of the present application, rather than all the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. The protection scope of the present application is subject to the scope claimed in the claims, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative labor belong to the protection scope of the present application.

Claims

1. A navigation positioning guide plate for guiding a sphenoid pterygoid process disjunction operation, characterized in that, The application relates to a guide plate for guiding a surgical operation on a zygomatic bone, which comprises the following parts: a fitting part which matches the external surface of the zygomatic bone and is in contact with the zygomatic bone and fixed on the zygomatic bone; two or more than two fixing nail holes on the fitting part; a navigation channel which is a cavity structure extending from the fitting part, and the axis of the navigation channel points to a predetermined osteotomy plane at the root of the pterygoid process of the sphenoid bone.

2. The navigation positioning guide plate for guiding sphenoid wing process disjunction operation according to claim 1, characterized in that, The hole direction of the fixing nail hole is perpendicular to the surface of the zygomatic bone.

3. The navigation positioning guide plate for guiding sphenoid wing process disjunction operation according to claim 1, characterized in that, The inner diameter of the navigation channel matches the size of an adaptive bone chisel.

4. The navigation positioning guide plate for guiding sphenoid wing process disjunction operation according to claim 1, characterized in that, The material of the guide plate is medical-grade acrylic resin.

5. The navigation positioning guide plate for guiding sphenoid wing process disjunction operation according to claim 1, characterized in that, An elastic clamping structure is arranged on the edge of the fitting part to assist in fixing the guide plate.

6. The navigation positioning guide plate for guiding sphenoid wing process disjunction operation according to claim 1, characterized in that, An anti-skid line is arranged on the inner wall of the navigation channel.

Images