Face registration support of oral cranio-maxillofacial zygomatic implantation navigation system

Abstract

The utility model discloses an oral cranio-maxillofacial zygomatic implantation navigation system face registration support which comprises an oral interior, a plurality of retention holes are formed in the front portion of the oral interior, a metal lantern ring matched with a retention nail is arranged in each retention hole, the front outer side of the oral interior is connected with one or two out-of-oral extending portions, and the front outer side of each metal lantern ring is connected with one or two outer-of-oral extending portions. Registration conical pits which do not need registration nails are formed in one turning position and the tail end of the out-of-mouth extending part, and the tip ends of the registration conical pits face the interior of the registration support. According to the utility model, the original tedious operation of punching registration nails at multiple positions in the mouth, the caused extra trauma and the risk that the registration nails enter the maxillofacial gap and the maxillary sinus by mistake are avoided, the original titanium nail registration is abandoned, the problem of inaccurate registration point setting caused by metal artifacts is avoided, and the efficiency of the oral implant navigation operation is improved.

Description

Technical Field

[0001] The utility model relates to a facial registration bracket for an oral craniomaxillofacial and zygomatic implant navigation system, belonging to the technical field of oral medical equipment. Background Art

[0002] Navigation systems are increasingly widely used in the field of oral implants. The navigation system can track the position of patients and surgical instruments in real time, which can achieve precise placement of oral implants, further improving the minimally invasive, safe and accurate nature of oral implant restorations.

[0003] Currently, navigation systems primarily track patient position using a spatial mapping device rigidly connected to the patient. This device typically consists of a fixture directly attached to the patient's anatomy, a positioning device for navigation system identification, and a connector connecting the fixture and positioning devices. A facial registration device is secured to the patient's residual alveolar ridge via retaining pins, with auxiliary retention provided by the maxillary hard palate, maxillary tuberosity, and buccal vestibule groove. The registration device, extending from the upper lip within the mouth, is connected via a connecting rod to the skin surfaces of the patient's bilateral zygomatic bones and lateral orbital wall. Registration points, designed with grooves, are easily identified by the navigation design physician after CBCT or spiral CT scans, ensuring that all registration points are distributed around the surgical area. This device, which has not yet been commercially reported, has demonstrated strong repeatability and high accuracy in clinical trials, avoiding the significant impact of metal titanium pin registration artifacts on navigation design errors. Furthermore, this method reduces the trauma associated with intraoral titanium pin registration, reducing the number of titanium pins required from 6-8 to only 3-4, simplifying the physician's operation.

[0004] The shortcomings or disadvantages of the current existing technology are as follows:

[0005] Because zygomatic implants are often located close to the outside of the orbit, damage to the orbital contents and the blood vessels and nerves of the pterygoid venous plexus is a concern. Using a dynamic, real-time navigation system can minimize surgical blindness and mitigate surgical risks, especially in cases where two zygomatic implants are required on one side. Error control is extremely stringent. Existing navigation systems primarily use intraosseous titanium screws for preoperative registration of edentulous jaws. This method is relatively accurate within the mouth, but the error is relatively large in areas far from the zygomatic bone and lateral orbital wall. Furthermore, multiple titanium screws need to be placed in the mouth, causing pain and trauma to the patient. Furthermore, for patients with severe bone deficiency in the posterior region, bilateral titanium screw placement in the posterior region often carries the risk of misplacement into the maxillary sinus or maxillofacial space.

[0006] The existing patent 202322145283.6 has a stability problem: it discloses "a registration plate for zygomatic implant navigation surgery, which is fixed in the mouth by screws or with the help of intraoral implants or remaining teeth, and then the registration pins can be used to complete the registration", but the method adopted by this patent requires the use of implants or remaining teeth for retention. Patients who need zygomatic implant surgery (i.e., who need to use this registration plate for registration) often have edentulous jaws and severe maxillary atrophy. The residual bone volume may only support the implantation of one implant, and the use of one implant for retention may cause the rotation of the registration plate. If the registration plate cannot remain stable, the registration cannot be completed, and its meaning of existence is lost.

[0007] In addition, there are metal artifacts in the existing technology: the registration points made of metal materials cannot clearly find the position of the center of the nail, which may cause an increase in the registration error. Summary of the Invention

[0008] The technical problems to be solved by the present invention are: how to control the error during zygomatic implantation and reduce the number of titanium nails implanted; and for patients with severe bone deficiency in the posterior teeth area, how to avoid the risk of titanium nails implanted in the bilateral posterior teeth area causing the nails to be misplaced into the maxillary sinus or maxillofacial space.

[0009] In order to solve the above technical problems, the technical solution of the utility model is to provide a facial registration bracket for an oral craniofacial and zygomatic implant navigation system, which is characterized in that it includes an inner part of the mouth, a plurality of retention holes are provided in the front part of the inner part of the mouth, each retention hole contains a metal ring matching the retention pin, the front and outer sides of the inner part of the mouth are connected to one or two extraoral extensions, and a turning point and the end of the extraoral extension are provided with a registration conical pit that does not require a registration pin, and the tip of the registration conical pit faces the inside of the registration bracket.

[0010] Preferably, the interior of the mouth is in the shape of a dental arch and matches the dental arch.

[0011] Preferably, the number of the retention holes is 3-4, distributed in the front part of the mouth.

[0012] Preferably, the retaining nail is a long retaining nail.

[0013] Preferably, the outer extension portion is a polygonal bending structure bent in the same direction.

[0014] Preferably, the extraoral extension portion includes a first connecting segment, a second connecting segment, a third connecting segment, and a fourth connecting segment that are bent and connected in sequence in the same direction. An angle is provided between any two adjacent ones of the first connecting segment, the second connecting segment, the third connecting segment and the fourth connecting segment, and they are all bent in the same direction; a plurality of aligned conical pits are provided on the outer side of one end of the second connecting segment close to the first connecting segment; a plurality of aligned conical pits are provided on the fourth connecting segment, or on the outer side of one end of the third connecting segment close to the fourth connecting segment.

[0015] Preferably, the extraoral extension portion extends toward the zygomatic bone and gradually narrows; the extraoral extension portion extends to both zygomatic bones and is in close contact with the skin on the zygomatic bone surface or is 1-2 mm away from the skin on the zygomatic bone surface.

[0016] Preferably, the registration conical pit has a diameter of 2-3 mm and a depth of 2-3 mm.

[0017] Preferably, 2-3 aligned conical pits are provided at the turning point of the extraoral extension portion, the spacing between each aligned conical pit is 5-8 mm, and they are distributed linearly or triangularly.

[0018] Preferably, the end of the extraoral extension portion is provided with 4-5 aligned conical pits, the spacing between each aligned conical pit is 4-5 mm, and they are distributed in an "M" shape.

[0019] This new device utilizes an edentulous jaw guide (i.e., the interior of the mouth) as a baseplate, providing a larger contact area with the mucosa. Four long retention pins are also used for retention, effectively improving overall stability. The existing registration pins are replaced with registration conical recesses, eliminating artifacts. Furthermore, improvements to the extraoral extension structure avoid the pressure on the lips associated with existing technologies.

[0020] The utility model provides a facial registration bracket for an oral craniofacial zygomatic implant navigation system, that is, an integral bracket extending from the inside of the mouth to the skin surface of the zygomatic bone. The registration bracket is fixed to the maxillary bone by 3-4 retaining pins. It is highly maneuverable, avoiding the tedious operation of inserting registration pins in multiple places in the mouth, as well as the additional trauma and the risk of the registration pins mistakenly entering the maxillofacial space and the maxillary sinus. It supports multiple repeatable operations with good repeatability, is suitable for use in preoperative preparation operations for general anesthesia surgery, and facilitates the anesthesia induction required during general anesthesia. The facial bracket is extended to the area near the zygomatic bone to improve the accuracy of zygomatic bone navigation. Grooved registration points are set in the mouth and near the zygomatic bone, abandoning the original titanium pin registration, avoiding the problem of inaccurate registration point setting caused by metal artifacts, and improving the efficiency of oral implant navigation surgery.

[0021] The utility model meets the needs of intraoral and zygomatic double-end implant accuracy, can improve the registration accuracy of zygomatic implant surgery, improve surgical accuracy, simplify surgical operations, and reduce the additional trauma and risks caused by the implantation of too many registration pins. The detachable retention pin design facilitates anesthesia induction during general anesthesia surgery. At the same time, through the registration conical pits, it avoids the visual blurring caused by metal titanium pins (registration pins) on CT images in the navigation design. It improves the efficiency of complex craniomaxillofacial zygomatic implant navigation surgery, is conducive to the further promotion of navigation systems in the field of oral implants, has significant social value and application value, and deserves vigorous promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A stereoscopic image of a facial registration bracket for an oral craniomaxillofacial and zygomatic implant navigation system;

[0023] Figure 2 This is a front view of a facial registration bracket for an oral craniomaxillofacial and zygomatic implant navigation system;

[0024] Figure 3 This is a partial right image of a facial registration bracket for an oral craniofacial and zygomatic implant navigation system;

[0025] Figure 4 This is a bottom view of a facial registration bracket for an oral craniomaxillofacial and zygomatic implant navigation system;

[0026] Figure 5 A schematic diagram of a facial registration bracket for an oral craniofacial and zygomatic implant navigation system installed in the mouth;

[0027] Figure 6 The registration error distribution diagram of the conical pit group and the titanium nail group. DETAILED DESCRIPTION

[0028] In order to make the present invention more clear and easy to understand, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] The utility model provides a facial registration bracket for an oral craniofacial and zygomatic implant navigation system. Figures 1-4As shown, it includes an inner part of the mouth 1, retention holes 2, an outer extension part 3 and a registration conical pit 4. The inner part of the mouth 1 is in the shape of a dental arch and matches the dental arch. The shape of the inner part of the mouth 1 is designed based on the oral scan of the patient's maxilla or the scan of the maxillary model, and the thickness is 3-4 mm. There are generally 3-4 retention holes 2, distributed in the front part of the inner part of the mouth 1. The retention holes 2 contain metal rings. After the inner part of the mouth 1 is fixed in the patient's mouth, the retention nail drill is used to complete the preparation along the retention hole 2, and the retention nail is inserted into the retention hole 2 to complete the retention of the facial registration bracket. There are generally 2 outer extension parts 3, located on the front and outside of the inner part of the mouth 1, with a polygonal bending structure. The outer extension part 3 extends toward the zygomatic bone and gradually narrows, extending to the vicinity of the bilateral zygomatic bones, close to the surface skin of the zygomatic bone or 1-2 mm away from the surface skin of the zygomatic bone. The registration conical pit 4 has a diameter of 2-3mm, a depth of 2-3mm, and the tip is facing the inside of the registration bracket; the registration conical pit 4 is located at the turning point and the end of the extraoral extension 3, with 2-3 at the turning point and 4-5 at the end of the extraoral extension 3, among which the 2-3 at the turning point are spaced 5-8mm apart and are distributed linearly or triangularly; the 4-5 registration conical pits 4 at the end are distributed in an "M" shape with a spacing of 4-5mm.

[0031] The extraoral extension 3 comprises a first connecting segment 31, a second connecting segment 32, a third connecting segment 33, and a fourth connecting segment 34, which are connected in a sequentially bent manner. This means that any two adjacent segments of the first, second, third, and fourth connecting segments 31, 32, 33, and 34 are angled and all bend in the same direction, effectively forming a gate-like structure. Registration conical recesses 4 are provided on the outer side of the second connecting segment 32 near the end of the first connecting segment 31 (herein arranged in a linear or triangular pattern), and on the outer side of the fourth connecting segment 34 (or on the fourth connecting segment 34 and the third connecting segment 33 near the end of the fourth connecting segment 34) (herein arranged in an "M" shape).

[0032] like Figure 2 、 Figure 3 As shown, the angle between the outer extension portion 3 and the plane of the inner portion 1 of the mouth is 30°-55°, wherein the length of the third connecting section 33 is 10-15 cm.

[0033] The extension directions between the segments in one of the extraoral extension portions 3 are as follows:

[0034] The second connecting section 32 extends toward the front, upper and right direction of the first connecting section 31, and the angle between the first connecting section 31 and the second connecting section 32 is 90°-130°; the third connecting section 33 extends toward the front, upper and right direction of the second connecting section 32, and the angle between the second connecting section 32 and the third connecting section 33 is 90°-120°; the fourth connecting section 34 extends toward the front, upper and right direction of the third connecting section 33, and the angle between the third connecting section 33 and the fourth connecting section 34 is 120°-170°.

[0035] The use of this utility model is as follows:

[0036] like Figure 5 As shown, the registration bracket 6 of the present invention is fixed to the maxillary bone 7, which can achieve a wide distribution of the registration conical pits 4 inside the mouth, outside the mouth and on the zygomatic side, increase the distribution range of the registration points, and make the registration points closer to the zygomatic area, thereby ultimately improving the accuracy of zygomatic implant navigation registration and navigation surgery.

[0037] The differences between this utility model and the existing patent 202322145283.6 are as follows:

[0038] 1. Based on facial morphology, the innovative addition of a second connecting segment 32 can effectively bring the terminal extension arm of the registration point distribution closer to the zygomatic bone, thereby further improving the registration accuracy around the zygomatic bone and avoiding complications of zygomatic implant surgery;

[0039] 2. Based on facial morphology, the innovative addition of a second connecting section 32 can effectively avoid the discomfort and localized swelling caused by the pressure on the lips caused by previous products;

[0040] 3. In terms of accuracy, the design of the registration conical pit 4 effectively avoids the influence of metal artifacts on registration, significantly improving registration accuracy. The pit registration system significantly improves the accuracy of TRE registration error and the entry, exit, and angle deviations of the zygomatic implant. See the table below for details.

[0041] Table: Target point registration error (TRE) of titanium pins and registration conical pits

[0042] Titanium nail (registration nail) set

[0043]

[0044]

[0045] Registering conical pit groups

[0046] frequency error 1 0.4 2 0.2 3 0.5 4 0.1 5 0.1 6 0.9 7 0.2 8 0.3 9 0.7 10 0.5 11 0.7 12 0.6 13 0.3 14 0.8 15 0.6 16 0.9 17 0.3 18 0.6 19 0.4 20 0.4

[0047] After normality test, both groups of data were normally distributed, so two independent sample t-tests were used. Due to the unequal variances of the two groups, the results of the unequal variance test showed that there was a significant difference in TRE between the two groups (p < 0.000). Among them, the deviation of the registration conical pit group (0.48mm ± 0.25mm) was significantly smaller than that of the titanium nail group (1mm ± 0.42mm), that is, the registration accuracy of the registration conical pit group increased by more than 50%. Figure 6 As shown (in the figure, the horizontal coordinate 1.00 is the titanium nail group, 2.00 is the alignment conical pit group, and the vertical coordinate is the error value).

[0048] Example 2

[0049] like Figure 4 As shown, in addition to the above parts, an anterior tooth implant guide hole 5 can also be designed to facilitate the anterior tooth guide plate surgery operation while performing zygomatic implant navigation surgery alignment; wherein, the length of the alignment bracket extending from the inside of the mouth 1 to the turning point is 10-25mm.

Claims

1. A facial registration bracket for an oral craniofacial and zygomatic implant navigation system, characterized in that: The invention comprises an inner part of the mouth (1), a plurality of retaining holes (2) are provided at the front of the inner part of the mouth (1), a metal ring matching the retaining pin is contained in each retaining hole (2), one or two outer extension parts (3) are connected to the front and outer sides of the inner part of the mouth (1), a turning point and an end of the outer extension part (3) are provided with a registration conical pit (4) that does not require a registration pin, and the tip of the registration conical pit (4) faces the inside of the registration bracket.

2. The facial registration bracket of the oral craniofacial and zygomatic implant navigation system according to claim 1, characterized in that: The interior of the mouth (1) is in the shape of a dental arch and matches the dental arch.

3. The facial registration bracket of the oral craniofacial and zygomatic implant navigation system according to claim 1, characterized in that: The number of the retaining holes (2) is 3-4 and they are distributed in the front part of the inside of the mouth (1).

4. The facial registration bracket of the oral craniofacial and zygomatic implant navigation system according to claim 1, characterized in that: The retaining nail is a long retaining nail.

5. The facial registration bracket of the oral craniofacial and zygomatic implant navigation system according to claim 1, characterized in that: The outer extension portion (3) is a multi-sided bending structure bent in the same direction.

6. The facial registration bracket of the oral craniofacial and zygomatic implant navigation system according to claim 5, characterized in that: The extraoral extension portion (3) comprises a first connecting segment (31), a second connecting segment (32), a third connecting segment (33), and a fourth connecting segment (34) which are bent in sequence in the same direction. An angle is provided between any two adjacent ones of the first connecting segment (31), the second connecting segment (32), the third connecting segment (33), and the fourth connecting segment (34), and they are all bent in the same direction; a plurality of aligned conical pits (4) are provided on the outer side of one end of the second connecting segment (32) close to the first connecting segment (31); a plurality of aligned conical pits (4) are provided on the outer side of the fourth connecting segment (34), or on the outer side of one end of the third connecting segment (33) close to the fourth connecting segment (34).

7. The facial registration bracket of the oral craniofacial and zygomatic implant navigation system according to claim 1 or 5, characterized in that: The extraoral extension portion (3) extends toward the zygomatic bone and gradually narrows; the extraoral extension portion (3) extends to both zygomatic bones and is in close contact with the skin on the zygomatic bone surface or is 1-2 mm away from the skin on the zygomatic bone surface.

8. The facial registration bracket of the oral craniofacial and zygomatic implant navigation system according to claim 1, characterized in that: The registration conical pit (4) has a diameter of 2-3 mm and a depth of 2-3 mm.

9. The facial registration bracket of the oral craniofacial and zygomatic implant navigation system according to claim 1, characterized in that: The outer extension portion (3) is provided with 2-3 registration conical pits (4) at the turning point, and the spacing between the registration conical pits (4) is 5-8 mm, and they are distributed linearly or triangularly.

10. The facial registration bracket of the oral craniofacial and zygomatic implant navigation system according to claim 1, characterized in that: The end of the extraoral extension portion (3) is provided with 4-5 registration conical pits (4), the spacing between each registration conical pit (4) is 4-5mm, and the registration conical pits (4) are distributed in an "M" shape.

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