Personalized guide plate for three-dimensional navigation of maxillofacial nerves and positioning method

Abstract

The invention provides a personalized guide plate for maxillofacial nerve three-dimensional navigation and a positioning method, the personalized guide plate for maxillofacial nerve three-dimensional navigation comprises a fixing part and a navigation part, and the fixing part and the navigation part are designed according to maxillofacial three-dimensional imaging data of a patient and are formed through 3D integrated printing; and the navigation part is provided with a navigation positioning channel corresponding to a maxillofacial nerve of a patient. The fixing part and the navigation part are integrally printed and manufactured based on the maxillofacial three-dimensional imaging data of the patient, so that the matching degree of the fixing part and the maxillary / mandibular dentition form of the patient is relatively high, the matching degree of the navigation part and the face of the patient is also relatively high, and the setting accuracy of a navigation positioning channel is also relatively high; therefore, after the fixing part is arranged between the maxillary dentition and the mandibular dentition of the patient and is occluded, compared with a conventional pure face soft tissue fixing method, the navigation positioning channel on the navigation part is more accurate and reliable in positioning.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a personalized guide plate and positioning method for three-dimensional navigation of maxillofacial nerves. Background Art

[0002] Clinical diagnosis and treatment processes in oral and maxillofacial surgery, such as nerve block anesthesia and nerve radiofrequency treatment, often involve the positioning of maxillofacial nerves. Accurate positioning of nerves through three-dimensional navigation using personalized guides is crucial for nerve anesthesia / radiofrequency treatment in oral and maxillofacial surgery.

[0003] The three-dimensional guides reported so far for maxillofacial nerve positioning are mainly customized based on the imaging data of maxillofacial soft and hard tissues, and are simply fixed on soft tissues such as the external auditory canal, nose, and forehead skin during use. Since facial soft tissues have certain elasticity and deformation characteristics, conventional maxillofacial nerve personalized guides are prone to moving angles and directions during fixed-point operations, and there are problems such as inaccurate navigation positioning. Summary of the invention

[0004] In order to improve the problem that the existing maxillofacial nerve guide is limited by the characteristics of facial soft tissue and is prone to inaccurate navigation and positioning, the present application provides a personalized guide and positioning method for three-dimensional navigation of the maxillofacial nerve.

[0005] In the first aspect, the present application provides a personalized guide plate for three-dimensional navigation of the maxillofacial nerve, which adopts the following technical solution: A personalized guide plate for maxillofacial nerve three-dimensional navigation, comprising a fixing part and a navigation part, wherein the fixing part and the navigation part are designed based on the patient's maxillofacial three-dimensional imaging data and are 3D printed in an integrated manner; The navigation part is provided with a navigation positioning channel corresponding to the patient's maxillofacial nerve.

[0006] Furthermore, the fixing portion is configured as a bite plate structure that matches the maxillary / mandibular dentition morphology of the patient, and the navigation portion is naturally extended from the fixing portion.

[0007] Furthermore, the navigation part is also provided with auxiliary fixing points at the zygomatic bone, zygomatic arch, brow bone, frontal bone, alveolar bone, mandibular ramus, and mandibular chin where there is less soft tissue on the face. The auxiliary fixing points are combined with the fixing part to form a multi-point fixed fixation based on the two-point / three-point fixation principle.

[0008] Furthermore, when the fixing part is based on the maxillary dentition, in surgeries involving the extraoral method of the maxillary nerve through the foramen rotundum, the extraoral method of the mandibular nerve through the foramen ovale, and the extraoral method of the supraorbital / inferiorbital nerve through the supraorbital / inferiorbital foramen, the auxiliary fixing point corresponds to the zygomatic arch and the brow arch of the patient's zygomatic bone; In a surgery involving the infraorbital nerve intraoral approach through the infraorbital foramen, the auxiliary fixation point corresponds to the patient's maxillary alveolar bone.

[0009] Furthermore, when the fixing portion is based on the mandibular dentition, in a surgery involving the inferior alveolar nerve through the mandibular foramen via the intraoral approach, the auxiliary fixing point corresponds to the ascending ramus of the mandible of the patient; In the surgery involving the extraoral method of the mental nerve through the mental foramen, the auxiliary fixation point corresponds to the chin of the patient's mandible; In a surgery involving the mental nerve intraoral approach through the mental foramen, the auxiliary fixation point corresponds to the patient's mandibular alveolar bone.

[0010] Furthermore, the navigation unit is provided with different navigation positioning channels corresponding to one or more maxillofacial nerves of the patient, such as the maxillary nerve, mandibular nerve, inferior alveolar nerve, mental nerve, supraorbital nerve, infraorbital nerve, etc.

[0011] Furthermore, the navigation part is provided with a plurality of navigation positioning channels at different angles for the same maxillofacial nerve.

[0012] Furthermore, the maxillofacial three-dimensional imaging data includes the patient's maxillofacial soft tissue data and hard tissue data; The soft tissue data includes the morphology of the patient's facial skin, upper and lower lips, gingival mucosa, buccal mucosa, and tongue; The hard tissue data include the morphology of the patient's maxillary / mandibular dentition, maxillary / mandibular bones, zygomatic bones, zygomatic arches, brow bones, frontal bones, and the morphological positions of the foramen rotundum, foramen ovale, mandibular foramen, mental foramen, supraorbital foramen, and infraorbital foramen.

[0013] In a second aspect, the present application provides a positioning method for three-dimensional navigation of the maxillofacial nerve, based on the above-mentioned personalized guide plate for three-dimensional navigation of the maxillofacial nerve, comprising the following steps: S1. designing and printing the fixing part and the navigation part according to the three-dimensional maxillofacial imaging data of the patient, and performing sterilization operations of the fixing part and the navigation part and disinfection operations of the patient's face and oral cavity; S2. fitting the navigation part to the patient's face, and allowing the patient to bite the fixing part between the maxillary dentition and the mandibular dentition to fix the fixing part; S3. Setting the needle insertion depth of nerve anesthesia / radiofrequency treatment according to the patient's maxillofacial three-dimensional imaging data, inserting the anesthesia syringe / radiofrequency needle into the navigation positioning channel at the set needle insertion depth, and performing subsequent nerve injection anesthesia / radiofrequency treatment operations; S4. After the operation is completed, gradually withdraw the anesthesia syringe / radio frequency needle from the navigation positioning channel, remove the fixing part and the navigation part, and press the injection point on the patient's face with a sterile cotton ball for 5-10 minutes.

[0014] Furthermore, in addition to fixation based on the maxillary / mandibular dentition, the fixing part also performs multi-point fixed fixation based on the two-point / three-point fixation principle at the zygomatic bone, zygomatic arch, brow bone, frontal bone, and alveolar bone where there is less facial soft tissue, so as to solve the situation where the distal end of the navigation part is far from the fixing part, resulting in poor fixation effect.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. The fixing part and the navigation part are made by integrated printing based on the patient's maxillofacial three-dimensional imaging data, so that the fixing part has a high degree of conformity with the patient's maxillary / mandibular dentition morphology, and the navigation part has a high degree of conformity with the patient's face, and the navigation positioning channel is set with higher accuracy. Therefore, when the fixing part is placed between the patient's maxillary dentition and mandibular dentition and occluded, compared with the conventional simple facial soft tissue fixation method, the navigation positioning channel on the navigation part of the present application is more accurate and reliable; 2. By setting multiple navigation positioning channels with different navigation angles on the navigation part, including the maxillary nerve, mandibular nerve, inferior alveolar nerve, mental nerve, supraorbital nerve, infraorbital nerve and other maxillofacial nerves, the clinician has more choices and is more practical; 3. By setting corresponding auxiliary fixing points on the navigation board in different operations and fitting them with the corresponding hard tissues on the patient's face, the guide plate composed of the fixed part and the navigation part can be fixed at multiple points as a whole, which can further solve the problem of poor overall fixation effect caused by the far end of the navigation part being far away from the fixed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are 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.

[0017] Figure 1 Schematic diagram of the navigation and positioning guide plate for the maxillary nerve through the circular foramen by the extraoral method according to an embodiment of the present application; Figure 2 Schematic diagram of the navigation and positioning guide plate for the mandibular nerve through the oval foramen by the extraoral method according to an embodiment of the present application; Figure 3 Schematic diagram of the navigation positioning guide plate for the inferior alveolar nerve through the mandibular foramen by the intraoral method according to an embodiment of the present application; Figure 4 Schematic diagram of a navigation positioning guide plate for the mental nerve extraoral method through the mental foramen in an embodiment of the present application; Figure 5It is a schematic diagram of a navigation positioning guide plate for the mental nerve intraoral method through the mental foramen in an embodiment of the present application; Figure 6 Schematic diagram of the navigation positioning guide plate of the supraorbital / infraorbital nerve extraoral method through the supraorbital / infraorbital foramen according to an embodiment of the present application; Figure 7 It is a schematic diagram of the navigation positioning guide plate of the infraorbital nerve intraoral method through the infraorbital foramen according to an embodiment of the present application.

[0018] Reference numerals: 1. Fixed part; 2. Navigation unit; 21. Navigation positioning channel. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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. Embodiment 1: Reference Figure 1 and Figure 2 The embodiment of the present application discloses a personalized guide plate for three-dimensional navigation of the maxillofacial nerve, which includes a fixing part 1 and a navigation part 2. The fixing part 1 and the navigation part 2 are designed based on the patient's maxillofacial three-dimensional imaging data and are 3D printed in an integrated manner.

[0020] The navigation unit 2 is provided with a navigation positioning channel 21 corresponding to the patient's maxillofacial nerve.

[0021] The fixing part 1 is configured as a bite plate structure that matches the maxillary / mandibular dentition morphology of the patient, and the navigation part 2 is naturally extended from the fixing part 1 .

[0022] Furthermore, the maxillofacial 3D imaging data includes the patient's maxillofacial soft tissue data and hard tissue data; Soft tissue data included the morphology of the patient’s facial skin, upper and lower lips, gingival mucosa, buccal mucosa, and tongue; Hard tissue data include the morphology of the patient's maxillary / mandibular dentition, maxillary / mandibular bones, zygomatic bones, zygomatic arches, brow bones, frontal bones, and the morphological positions of the foramen rotundum, foramen ovale, mandibular foramen, mental foramen, supraorbital foramen, and infraorbital foramen.

[0023] Therefore, by integrated printing and manufacturing of the fixing part 1 and the navigation part 2 based on the patient's maxillofacial three-dimensional imaging data, the fixing part 1 has a high degree of conformity with the patient's maxillary / mandibular dentition morphology, and the navigation part 2 has a high degree of fit with the patient's face, and the navigation positioning channel 21 has a higher setting accuracy. Therefore, when the fixing part 1 is placed between the patient's maxillary dentition and mandibular dentition and occluded, compared with the conventional simple facial soft tissue fixation method, the navigation positioning channel 21 on the navigation part 2 of the present application is more accurately and reliably positioned.

[0024] In addition, to further increase the diversity of treatment.

[0025] In one embodiment, the navigation unit 2 is provided with different navigation positioning channels 21 corresponding to one or more maxillofacial nerves of the patient, such as the maxillary nerve, mandibular nerve, inferior alveolar nerve, mental nerve, supraorbital nerve, and infraorbital nerve.

[0026] In another embodiment, referring to Figure 1 and Figure 2 The navigation part 2 is provided with a plurality of navigation positioning channels 21 at different angles for the same maxillofacial nerve.

[0027] In this way, by setting multiple navigation positioning channels 21 with different navigation angles including multiple maxillofacial nerves such as maxillary nerve, mandibular nerve, inferior alveolar nerve, mental nerve, supraorbital nerve, infraorbital nerve, etc. on the navigation part 2, clinicians have more choices and stronger practicality.

[0028] Furthermore, in order to further improve the fixing stability of the guide plate of the present application.

[0029] The navigation part 2 is also provided with auxiliary fixing points at the zygomatic bone, zygomatic arch, brow bone, frontal bone, alveolar bone, mandibular ramus, and mandibular chin where there is less soft tissue on the face. The auxiliary fixing points are combined with the fixing part 1 to form a multi-point fixed fixation based on the two-point / three-point fixation principle.

[0030] Specifically, when the fixing part 1 is based on the maxillary dentition, in the surgery involving the extraoral method of the maxillary nerve through the foramen rotundum, the extraoral method of the mandibular nerve through the foramen ovale, and the extraoral method of the supraorbital / inferior orbital nerve through the supraorbital / inferior orbital foramen, the auxiliary fixing point corresponds to the zygomatic arch and the brow arch of the patient's zygomatic bone; In surgeries involving the infraorbital nerve through the infraorbital foramen, the auxiliary fixation point corresponds to the patient's maxillary alveolar bone.

[0031] When the fixing part 1 is based on the mandibular dentition, in the surgery involving the inferior alveolar nerve through the mandibular foramen, the auxiliary fixing point corresponds to the ascending ramus of the mandible of the patient; In the surgery involving the extraoral approach of the mental nerve through the mental foramen, the auxiliary fixation point corresponds to the chin of the patient's mandible; In the procedure involving the mental nerve intraoral approach through the mental foramen, the auxiliary fixation point corresponds to the patient's mandibular alveolar bone.

[0032] Therefore, by setting corresponding auxiliary fixing points on the navigation board and fitting them with the corresponding hard tissues on the patient's face in different operations, the guide plate composed of the fixing part 1 and the navigation part 2 can be fixed at multiple points as a whole, which can further solve the problem of poor overall fixation effect caused by the far end of the navigation part 2 being far away from the fixing part 1.

[0033] The present application also discloses a positioning method for three-dimensional navigation of the maxillofacial nerve, based on the above-mentioned personalized guide plate for three-dimensional navigation of the maxillofacial nerve, using the following technical solution: A positioning method for maxillofacial nerve three-dimensional navigation comprises the following steps: S1. Design and print the fixed part 1 and the navigation part 2 according to the patient's maxillofacial 3D imaging data, sterilize the fixed part 1 and the navigation part 2, and disinfect the patient's face and oral cavity; S2. Fit the navigation part 2 to the patient's face, and let the patient bite the fixed part 1 between the maxillary dentition and the mandibular dentition to fix the fixed part 1; S3. Set the needle insertion depth of the nerve anesthesia / radiofrequency treatment according to the patient's maxillofacial three-dimensional imaging data, insert the anesthesia syringe / radiofrequency needle into the navigation positioning channel 21 at the set needle insertion depth, and perform subsequent nerve injection anesthesia / radiofrequency treatment operations; S4. After the operation is completed, gradually withdraw the anesthesia syringe / radiofrequency needle from the navigation positioning channel 21, remove the fixing part 1 and the navigation part 2, and press the injection point on the patient's face with a sterile cotton ball for 5-10 minutes.

[0034] Among them, in step S2, in addition to fixation based on the maxillary / mandibular dentition, the fixing part 1 also performs multi-point fixed fixation based on the two-point / three-point fixation principle at the zygomatic bone, zygomatic arch, brow bone, frontal bone, and alveolar bone where there is less facial soft tissue, so as to solve the situation where the distal end of the navigation part 2 is far away from the fixing part 1, resulting in poor fixation effect.

[0035] The implementation principle of a personalized guide plate for three-dimensional navigation of the maxillofacial nerve in the embodiment of the present application is as follows: The fixing part 1 and the navigation part 2 are produced by integrated printing based on the patient's maxillofacial three-dimensional imaging data, so that the fixing part 1 has a high degree of conformity with the patient's maxillary / mandibular dentition morphology, and the navigation part 2 has a high degree of fit with the patient's face, and the navigation positioning channel 21 has a higher setting accuracy. Therefore, when the fixing part 1 is placed between the patient's maxillary dentition and mandibular dentition and occluded, compared with the conventional simple facial soft tissue fixation method, the navigation positioning channel 21 on the navigation part 2 of the present application is more accurately and reliably positioned.

[0036] By providing multiple navigation positioning channels 21 with different navigation angles including multiple maxillofacial nerves such as the maxillary nerve, mandibular nerve, inferior alveolar nerve, mental nerve, supraorbital nerve, infraorbital nerve, etc. on the navigation part 2, clinicians have more choices and better practicality.

[0037] By setting corresponding auxiliary fixing points on the navigation board and fitting them with the corresponding hard tissues on the patient's face in different operations, the guide plate composed of the fixing part 1 and the navigation part 2 can be fixed at multiple points as a whole, which can further solve the problem of poor overall fixation effect caused by the far end of the navigation part 2 being far away from the fixing part 1.

[0038] Embodiment 2: The embodiment of the present application discloses a positioning method for three-dimensional navigation of the maxillofacial nerve, which is mainly aimed at the needs of anesthesia / radiofrequency treatment of the maxillary nerve.

[0039] Specifically, the navigation positioning guide for the maxillary nerve through the foramen is designed and printed based on the patient's maxillofacial 3D imaging data, such as Figure 1 As shown, a navigation positioning channel 21 is provided from the sigmoid notch to the foramen rotundum, or from the zygomatic bone to the foramen rotundum, or navigation positioning channels 21 are provided in two directions.

[0040] Then sterilize the navigation positioning guide and disinfect the patient's face and oral cavity; then fix the navigation positioning guide based on the patient's maxillary dentition, zygomatic bone and zygomatic arch, and brow bone and brow arch based on the three-point fixation principle; calculate the distance from the surface of the navigation positioning channel 21 to the circular hole according to the patient's maxillofacial three-dimensional imaging data, and set the needle insertion depth of nerve anesthesia / radio frequency treatment; insert the anesthetic syringe / radio frequency needle into the navigation positioning channel 21 at the entrance of the navigation positioning channel 21 outside the mouth, and reach the circular hole through the skin after the set needle insertion depth; then perform subsequent nerve injection anesthesia / radio frequency treatment operations; after the operation is completed, gradually withdraw the anesthetic syringe / radio frequency needle from the navigation positioning channel 21, remove the navigation positioning guide, and press the needle insertion point with a sterile cotton ball for 5-10 minutes.

[0041] Embodiment 3: The present application embodiment discloses a positioning method for three-dimensional navigation of the maxillofacial nerve, which is mainly aimed at the anesthesia / radiofrequency treatment needs of the mandibular nerve. First, a navigation positioning guide plate for the mandibular nerve through the oval foramen is designed and printed according to the patient's maxillofacial three-dimensional imaging data. Figure 2 As shown, a navigation positioning channel 21 is provided from the sigmoid notch to the oval foramen, or from the zygomatic bone to the oval foramen, or navigation positioning channels 21 in two directions are provided at the same time.

[0042] Then sterilize the navigation positioning guide and disinfect the patient's face and oral cavity; then fix the navigation positioning guide based on the patient's maxillary dentition, zygomatic bone and zygomatic arch, and brow bone and brow arch based on the three-point fixation principle; set the distance from the navigation channel surface to the foramen ovale calculated according to the imaging data, and insert the anesthetic syringe / radio frequency needle into the navigation positioning channel 21 at the entrance of the navigation positioning channel 21 outside the mouth, and reach the foramen ovale through the skin to the set needle insertion depth; then perform subsequent neural injection anesthesia / radio frequency treatment operations; after the operation is completed, gradually withdraw the anesthetic syringe / radio frequency needle from the navigation positioning channel 21, remove the navigation positioning guide, and press the needle insertion point with a sterile cotton ball for 5-10 minutes.

[0043] Embodiment 4: The present application embodiment discloses a positioning method for three-dimensional navigation of the maxillofacial nerve, which is mainly aimed at the anesthesia / radiofrequency treatment needs of the inferior alveolar nerve. First, a navigation positioning guide plate for the inferior alveolar nerve through the mandibular foramen is designed and printed according to the patient's maxillofacial three-dimensional imaging data. Figure 3 As shown, a navigation positioning channel 21 is set from the opposite corner of the mouth to the mandibular foramen. Then, the navigation positioning guide is sterilized, and the patient's face and oral cavity are disinfected; the navigation positioning guide is then positioned and fixed based on the patient's mandibular dentition and mandibular ascending ramus; the needle insertion depth of the nerve anesthesia / radio frequency treatment is set according to the distance from the navigation channel surface to the mandibular foramen calculated based on the imaging data; after the patient opens his mouth, the anesthetic syringe / radio frequency needle is inserted into the navigation positioning channel 21 along the entrance of the navigation positioning channel 21 in the mouth, and the mandibular foramen is reached after passing through the buccal mucosa to the set needle insertion depth; subsequent nerve injection anesthesia / radio frequency treatment operations are then performed; after the operation is completed, the anesthetic syringe / radio frequency needle is gradually withdrawn from the navigation positioning channel 21, and the navigation positioning guide is removed, and the needle insertion point is pressed with a sterile cotton ball for 5-10 minutes.

[0044] Embodiment 5: The present application embodiment discloses a positioning method for three-dimensional navigation of the maxillofacial nerve, which is mainly aimed at the needs of mental nerve anesthesia / radiofrequency treatment. First, a navigation positioning guide plate for the extraoral method of the mental nerve through the mental foramen is designed and printed according to the patient's maxillofacial three-dimensional imaging data. Figure 4 As shown, a navigation positioning channel 21 is set from the front side through the lower lip to the mental foramen.

[0045] Then, the navigation positioning guide is sterilized, and the patient's face and oral cavity are disinfected; the navigation positioning guide is then positioned and fixed based on the patient's mandibular dentition and mandibular chin; the distance from the navigation channel surface to the mental foramen calculated based on the imaging data is used to set the needle insertion depth for nerve anesthesia / radio frequency treatment; the anesthetic syringe / radio frequency needle is inserted into the navigation positioning channel 21 at the entrance of the navigation positioning channel 21 outside the mouth, and the mental foramen is reached after the needle insertion depth is set through the soft tissue of the lower lip; subsequent nerve injection anesthesia / radio frequency treatment operations are then performed; after the operation is completed, the anesthetic syringe / radio frequency needle is gradually withdrawn from the navigation positioning channel 21, and the navigation positioning guide is removed, and the needle insertion point is pressed with a sterile cotton ball for 5-10 minutes.

[0046] Embodiment 6: The present application embodiment discloses a positioning method for three-dimensional navigation of the maxillofacial nerve, which is mainly aimed at the needs of mental nerve anesthesia / radiofrequency treatment. First, a navigation positioning guide plate for the mental nerve through the mental foramen is designed and printed according to the patient's maxillofacial three-dimensional imaging data. Figure 5 As shown, a navigation positioning channel 21 is set from the front side without passing through the lower lip to the mental foramen.

[0047] Then, the navigation positioning guide is sterilized and the patient's face is disinfected; the navigation positioning guide is then positioned and fixed based on the patient's mandibular dentition and mandibular alveolar bone; the needle insertion depth of the nerve anesthesia / radio frequency treatment is set according to the distance from the navigation channel surface to the mental foramen calculated based on the imaging data; the soft tissue of the patient's lower lip is spread open, and then the anesthetic syringe / radio frequency needle is inserted into the navigation positioning channel 21 along the entrance of the navigation positioning channel 21 in the mouth, and the mental foramen can be reached after passing through the gingival mucosa to the set needle insertion depth; subsequent nerve injection anesthesia / radio frequency treatment operations are then performed; after the operation is completed, the anesthetic syringe / radio frequency needle is gradually withdrawn from the navigation positioning channel 21, and the navigation positioning guide is removed, and the needle insertion point is pressed with a sterile cotton ball for 5-10 minutes.

[0048] Embodiment 7: The present application embodiment discloses a positioning method for three-dimensional navigation of maxillofacial nerves, which is mainly aimed at the needs of anesthesia / radiofrequency treatment of supraorbital / infraorbital nerves. First, a navigation positioning guide plate of the supraorbital / infraorbital nerves through the supraorbital / infraorbital foramen is designed and printed according to the patient's three-dimensional maxillofacial imaging data. Figure 6 As shown, a navigation positioning channel 21 is provided from the front to the supraorbital foramen, and a navigation positioning channel 21 is provided from the front inner lower part to the infraorbital foramen.

[0049] Then sterilize the navigation positioning guide and disinfect the patient's face and oral cavity; then fix the navigation positioning guide based on the patient's maxillary dentition, zygomatic bone and zygomatic arch, and brow bone based on the three-point fixation principle; set the distance from the navigation channel surface to the supraorbital / inferior orbital foramen according to the imaging data; insert the anesthetic syringe / radio frequency needle into the navigation positioning channel 21 along the entrance of the navigation positioning channel 21, and reach the supraorbital / inferior orbital foramen after passing through the periorbital skin to the set needle insertion depth; then perform subsequent neural injection anesthesia / radio frequency treatment operations; after the operation is completed, gradually withdraw the anesthetic syringe / radio frequency needle from the navigation positioning channel 21, remove the navigation positioning guide, and press the needle insertion point with a sterile cotton ball for 5-10 minutes.

[0050] Embodiment 8: The present application embodiment discloses a positioning method for three-dimensional navigation of the maxillofacial nerve, which is mainly aimed at the anesthesia / radiofrequency treatment needs of the infraorbital nerve. First, a navigation positioning guide plate of the infraorbital nerve through the infraorbital foramen is designed and printed according to the patient's maxillofacial three-dimensional imaging data. Figure 7 As shown, a navigation positioning channel 21 is set from the front inner lower part of the mouth to the infraorbital foramen.

[0051] Then, the navigation positioning guide is sterilized, and the patient's face and oral cavity are disinfected; the navigation positioning guide is then fixed based on the patient's maxillary dentition and maxillary alveolar bone; the distance from the navigation channel surface to the infraorbital foramen calculated based on the imaging data is used to set the needle insertion depth for nerve anesthesia / radiofrequency treatment; after the patient's upper lip is spread open, the anesthetic syringe / radiofrequency needle is inserted into the navigation positioning channel 21 along the entrance of the navigation positioning channel 21 in the mouth, and the infraorbital foramen is reached after passing through the gingival mucosa to the set needle insertion depth; subsequent nerve injection anesthesia / radiofrequency treatment operations are then performed; after the operation is completed, the anesthetic syringe / radiofrequency needle is gradually withdrawn from the navigation positioning channel 21, and the navigation positioning guide is removed, and the needle insertion point is pressed with a sterile cotton ball for 5-10 minutes.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A personalized guide plate for three-dimensional navigation of maxillofacial nerve, characterized in that: It includes a fixing part and a navigation part, wherein the fixing part and the navigation part are designed based on the patient's maxillofacial three-dimensional imaging data and are 3D printed in an integrated manner; The navigation part is provided with a navigation positioning channel corresponding to the patient's maxillofacial nerve.

2. The personalized guide plate for maxillofacial nerve three-dimensional navigation according to claim 1, characterized in that: The fixing portion is configured as a bite plate structure that matches the maxillary / mandibular dentition morphology of the patient, and the navigation portion is naturally extended from the fixing portion.

3. The personalized guide plate for maxillofacial nerve three-dimensional navigation according to claim 2, characterized in that: The navigation part is also provided with auxiliary fixing points at the zygomatic bone, zygomatic arch, brow bone, frontal bone, alveolar bone, mandibular ramus, and mandibular chin where there is less soft tissue on the face. The auxiliary fixing points are combined with the fixing part to form a multi-point fixed fixation based on the two-point / three-point fixing principle.

4. The personalized guide plate for maxillofacial nerve three-dimensional navigation according to claim 3, characterized in that: When the fixing part is based on the maxillary dentition, in surgeries involving the extraoral method of the maxillary nerve through the foramen rotundum, the extraoral method of the mandibular nerve through the foramen ovale, and the extraoral method of the supraorbital / inferiorbital nerve through the supraorbital / inferiorbital foramen, the auxiliary fixing point corresponds to the zygomatic arch and the brow arch of the patient's zygomatic bone; In a surgery involving the infraorbital nerve intraoral approach through the infraorbital foramen, the auxiliary fixation point corresponds to the patient's maxillary alveolar bone.

5. The personalized guide plate for maxillofacial nerve three-dimensional navigation according to claim 3, characterized in that: When the fixing portion is based on the mandibular dentition, in a surgery involving the inferior alveolar nerve through the mandibular foramen, the auxiliary fixing point corresponds to the ascending ramus of the mandible of the patient; In the surgery involving the extraoral method of the mental nerve through the mental foramen, the auxiliary fixation point corresponds to the chin of the patient's mandible; In a surgery involving the mental nerve intraoral approach through the mental foramen, the auxiliary fixation point corresponds to the patient's mandibular alveolar bone.

6. The personalized guide plate for maxillofacial nerve three-dimensional navigation according to claim 1, characterized in that: The navigation unit is provided with different navigation positioning channels corresponding to one or more maxillofacial nerves of the patient, such as the maxillary nerve, mandibular nerve, inferior alveolar nerve, mental nerve, supraorbital nerve, infraorbital nerve, etc.

7. The personalized guide plate for maxillofacial nerve three-dimensional navigation according to claim 1, characterized in that: The navigation part is provided with a plurality of navigation positioning channels at different angles for the same maxillofacial nerve.

8. The personalized guide plate for maxillofacial nerve three-dimensional navigation according to claim 1, characterized in that: The maxillofacial three-dimensional imaging data includes the patient's maxillofacial soft tissue data and hard tissue data; The soft tissue data includes the morphology of the patient's facial skin, upper and lower lips, gingival mucosa, buccal mucosa, and tongue; The hard tissue data include the morphology of the patient's maxillary / mandibular dentition, maxillary / mandibular bones, zygomatic bones, zygomatic arches, brow bones, frontal bones, and the morphological positions of the foramen rotundum, foramen ovale, mandibular foramen, mental foramen, supraorbital foramen, and infraorbital foramen.

9. A positioning method for three-dimensional navigation of maxillofacial nerve, based on a personalized guide plate for three-dimensional navigation of maxillofacial nerve according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. designing and printing the fixing part and the navigation part according to the maxillofacial three-dimensional imaging data of the patient, and performing sterilization operations of the fixing part and the navigation part and disinfection operations of the patient's face and oral cavity; S2. fitting the navigation part to the patient's face, and allowing the patient to bite the fixing part between the maxillary dentition and the mandibular dentition to fix the fixing part; S3. Setting the needle insertion depth of nerve anesthesia / radiofrequency treatment according to the patient's maxillofacial three-dimensional imaging data, inserting the anesthesia syringe / radiofrequency needle into the navigation positioning channel at the set needle insertion depth, and performing subsequent nerve injection anesthesia / radiofrequency treatment operations; S4. After the operation is completed, gradually withdraw the anesthesia syringe / radio frequency needle from the navigation positioning channel, remove the fixing part and the navigation part, and press the injection point on the patient's face with a sterile cotton ball for 5-10 minutes.

10. The positioning method for maxillofacial nerve three-dimensional navigation according to claim 9, characterized in that: In step S2, in addition to fixation based on the maxillary / mandibular dentition, the fixing part also performs multi-point fixed fixation based on the two-point / three-point fixation principle at the zygomatic bone, zygomatic arch, brow bone, frontal bone, and alveolar bone where there is less facial soft tissue, so as to solve the situation where the distal end of the navigation part is far away from the fixing part, resulting in poor fixation effect.

Images