CN212574997U - Novel face bow - Google Patents

Abstract

The utility model discloses a novel face bow, which comprises a face cover frame, wherein the face cover frame is in a cross shape, and a connecting piece for connecting a joint fork or a joint support is arranged on the face cover frame; and a groove for accommodating the radiation-blocking gutta-percha is arranged on the outer surface of the face mask frame and along the cross-shaped trend. The multifunctional digital face bow provided by the utility model is beneficial to accurately and rapidly acquiring the three-dimensional information of the face and dentition of a patient, constructing a virtual patient and displaying the relationship among the teeth, gum and lips of the patient in an all-round way; meanwhile, the virtual jaw position relation transfer is completed, and the method has important functions in guiding prosthesis production and doctor-patient communication. The face bow provided by the utility model is convenient and light to use, and reduces the discomfort of the patient; meanwhile, the digital data obtained by fitting can be imported into repair design software, and a repair body is manufactured in a CAD/CAM mode, so that the finished product is consistent with the design.

Description

Novel face bow

Technical Field

The utility model relates to an oral cavity restoration plants technical field, concretely relates to novel face bow.

Background

In the clinical process of dental restoration implantation, in order to make the restoration more accurate and effective, the position relationship between the upper and lower jaw dentitions and the temporomandibular joint of a patient is often required to be transferred to a jaw frame to simulate the intraoral condition of the patient and guide the design and making of the restoration.

The jaw frame can be divided into a simple jaw frame, a semi-adjustable jaw frame and a full-adjustable jaw frame, and the simple jaw frame can only simulate simple opening and closing movement, so that a good repairing effect is difficult to obtain for complex patients. For the semi-adjustable jaw frame and the fully-adjustable jaw frame, a facial arch is needed to transfer the maxillary dentition model of a patient to the jaw frame, and then the mandibular dentition model is transferred to the jaw frame according to the position of the maxillary dentition. The traditional jaw position relation transfer upper jaw frame mode has the following shortcomings:

1. the semi-adjustable jaw frame which is most clinically applied can only partially simulate the protrusion and lateral movement of a patient, and although the use in daily clinic is basically met, for aesthetic restoration of some patients, especially anterior teeth, the restoration made by the semi-adjustable jaw frame can hardly achieve the expected treatment effect; although the fully adjustable jaw frame can completely simulate the jaw movement of a patient, the fully adjustable jaw frame is complex to operate, complex in equipment and quite inconvenient to record.

2. The traditional face bow has heavier mass and long operation time, and the patient experiences poor diagnosis.

3. With the coming of the digital era, doctors and technicians can adjust the shapes of restorations such as crowns, veneers and the like through software design, achieve the most ideal effect on function and attractiveness, output digital files and obtain the final restorations through cutting or 3D printing; however, the conventional repair process is time-consuming, requires high manual level of technicians, and makes it difficult to make the finally obtained prosthesis consistent with the design time.

4. The red-white aesthetics need to be considered for the aesthetic restoration of the anterior teeth, the approximate relations between dentition and joints, between gingiva and a dental crown can only be obtained by the traditional mode of transferring a dentition model maxilla frame by a facial arch, the relation between lips and teeth of a patient during smiling and laughing cannot be obtained, and accurate smiling design is difficult to perform.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the traditional face bow has heavier mass, complex structure and single function. The utility model provides a solve a novel face bow of above-mentioned problem.

The utility model discloses a following technical scheme realizes:

a novel face bow comprises a face cover frame, wherein the face cover frame is in a cross shape, and a connecting piece for connecting a joint fork or a joint support is arranged on the face cover frame; and a groove for accommodating the radiation-blocking gutta-percha is arranged on the outer surface of the face mask frame and along the cross-shaped trend.

Based on the problem that traditional face bow and jaw position relation shift exist, the utility model provides a novel face bow adopts criss-cross face bow structural design, makes four supports about the upper and lower of criss-cross face bow correspond with nasal part, chin, left side face and right side face of patient's face respectively: on one hand, the structure is greatly simplified, the weight is reduced, and the facial features of a human body are met, so that the upper, lower, left and right brackets of the cross-shaped facebow are respectively aligned with the nose, the chin, the left side face and the right side face of the face of a patient to be fixed, the large-area shielding of the face of the patient is avoided, and the interference obstruction of face scanning is reduced; on the other hand, the grooves for containing the radiation-blocking gutta-percha are distributed in a cross shape along the face bow, so that the application function of the face bow can be effectively expanded, the face bow is conveniently used in the operation processes of virtual jaw position relation transfer or virtual patient construction and the like, and the fitting precision of subsequent data processing is favorably improved.

Further preferably, the groove for accommodating the radiation-blocking gutta-percha is a continuous cross-shaped groove or a plurality of independent grooves which are regularly distributed to form a cross shape.

The recess can be continuous cross groove structure, the cross groove that communicates each other promptly to each side, in order to improve the fitting precision, the utility model discloses the preferred recess that sets up a plurality of mutual independence, all recesses move towards the law along the cross of facial mask frame and distribute, and finally all recesses form cross shape, during the use, inject scanning ray resistance tooth glue in every recess.

Preferably, the grooves for accommodating the radiation-blocking gutta-percha are a plurality of independent grooves which are regularly distributed and are in a cross shape; and the notch shape of each groove is a polygonal structure.

The utility model discloses in order to further improve the fitting accuracy of face bow in the digital processing process, the notch shape of design recess is polygon structure, the recess internal shape can be the same shape with the notch, also can be different shapes; when the face bow is used, the placing and installing direction of each polygon and the relative installing direction of all polygons are set so as to improve the fitting precision.

Further preferably, the notch shape of the groove comprises a triangle and a quadrangle; and the grooves with triangular notches and the grooves with quadrangular notches are alternately distributed.

The utility model further optimizes the shape of the notch of the groove to improve the fitting precision of the face bow in the digital processing process, for example, the fitting precision of CBCT and face sweeping is improved, and the grooves with triangular notch shapes and the grooves with quadrangular notch shapes are preferably designed to be alternately distributed, such as equilateral triangle and square; when the face-to-face square is used, the vertex angles of all the triangles can be arranged to face in the same direction with the direction from the chin to the top of the forehead, and each square is also arranged to be placed in the direction from the chin to the top of the forehead.

Preferably, the outer surface of the face mask frame is provided with a plurality of bulges, and all the bulges are distributed in an array along the cross-shaped trend of the face mask frame and are of a city wall type structure.

The utility model discloses set up "city wall formula structure" in facial mask frame one side of face dorsad, "city wall formula structure" is array distribution by a plurality of archs and constitutes, and each arch can all be regarded as wearing the face bow face to sweep the fitting mark point with face bow self mould sweeping, and the fitting precision is high.

Further preferably, the four brackets of the mask frame are fixed on the face of the patient by plastic deformation.

The upper, lower, left and right supports of the cross-shaped face mask frame correspond to the nose, the chin, the left side face and the right side face of the face of a patient respectively, the face mask frame can be clamped at the corresponding position of the face or stuck at the corresponding position, and the face mask frame can cover the face area near the corresponding position of the oral cavity like a face mask. The utility model has the advantages that the four brackets of the face mask frame are clamped and fixed on the face of a patient through plastic deformation, and each bracket is made of plastic deformation material or structure, so that the whole body of each bracket can be bent or bended; or at least one section of each bracket can be plastically deformed to realize clamping and fixing. When the facial support is used, external force is applied to a certain support of the facial mask frame, the corresponding support is bent or bent and is close to the corresponding position of the face of a patient as much as possible, the whole claw of the facial support is attached to the face, and when the external force is removed, the attaching state of the current claw is still kept unchanged; when the use is finished, the face mask frame can be taken down by applying external force again to enable a certain support of the face mask frame to be away from the corresponding position of the face of a patient.

Further preferably, face cover frame includes cross main part and centre gripping arm, and four support free ends of cross main part all are equipped with the centre gripping arm, the centre gripping arm rotates with four support free ends of font main part to be connected, and the axis of rotation of centre gripping arm is perpendicular with the axis of place support.

The utility model discloses preferred design face cover frame major structure comprises cross main part and centre gripping arm, and the centre gripping arm can be adjusted according to patient's face type, and the turned angle of centre gripping arm and corresponding support can reach 360, and patient's face is pressed close to as far as possible to peculiar connection structure angle of adjustment freely, reduces the fitting error.

Preferably, the free ends of the four brackets of the cross-shaped main body are provided with shaft sleeves I, one end of each clamping arm is provided with a shaft sleeve II, and the shaft sleeves I or the shaft sleeves II are provided with internal threads; run through axle sleeve I and axle sleeve II simultaneously through the bolt, and with axle sleeve I or axle sleeve II threaded connection, realize the fixed connection of support and centre gripping arm.

The utility model adopts the shaft sleeve and the bolt to adapt, and realizes the hinged connection of the clamping arm and the cross main body bracket; only one of the shaft sleeves is internally provided with a thread, when the clamping device is used, the clamping arm can rotate freely only by unscrewing the bolt, the bolt is screwed after the clamping arm rotates to a corresponding position, and the clamping arm and the support can be fixed due to friction.

Preferably, the connecting piece is a connecting rod, one end of the connecting rod is connected with the face cover frame, and the other end of the connecting rod is provided with a polygonal limiting block; one end of the combined fork or the combined support, which is matched with the connecting rod, is provided with a polygonal limiting groove matched with the polygonal limiting block; the polygon limiting groove is matched with the polygon limiting block in a clamping mode, and the screw penetrates through the polygon limiting block and the polygon limiting groove simultaneously to achieve the purpose of closing the fork or the support and the connecting piece to be fixedly connected.

The utility model is designed to be detachably arranged on the face mask frame, only one face bow is needed, and the combined support or the combined fork can be replaced for different patients, which is convenient, rapid and sanitary; the special connecting structure can effectively prevent the closing support/closing fork from twisting with the face bow.

Further preferably, a plurality of radiographic markers are included for fixation at the facial scan point location.

The utility model discloses still designed the radio imaging marker, during the use, be used for fixing the radio imaging marker in facial scanning point position department, like patient's both sides condyle salient point, left and/or side infraorbital hole point, chin position point and volume top position to be used in digital fitting processing process at the face bow, select some alignments to the scanning model of difference.

Further preferably, the radiographic marker is fixed to the face and is square in the scanning direction.

The utility model relates to an appearance of radiation imaging marker is polygonized structure, preferred square, and the line angle of square mark point is obvious, and the selective point aligns when being convenient for to mate.

The utility model discloses have following advantage and beneficial effect:

1. the utility model provides a novel face bow adopts criss-cross face bow structural design, makes four supports about the cross face bow correspond with facial nasal part, chin, left side face and the right side face of patient respectively: on one hand, the structure is greatly simplified, the weight is reduced, and the facial features of a human body are met, so that the upper, lower, left and right brackets of the cross-shaped facebow are respectively aligned with the nose, the chin, the left side face and the right side face of the face of a patient to be fixed, the large-area shielding of the face of the patient is avoided, and the interference obstruction of face scanning is reduced; on the other hand, the grooves for containing the radiation-blocking gutta-percha are distributed in a cross shape along the face bow, so that the application function of the face bow can be effectively expanded, the face bow is conveniently used in the operation processes of virtual jaw position relation transfer or virtual patient construction and the like, and the fitting precision of subsequent data processing is favorably improved.

2. The utility model discloses still designed the radio imaging marker, during the use, be used for fixing the radio imaging marker in facial scanning point position department, like patient's both sides condyle salient point, left and/or side infraorbital hole point, chin position point and volume top position to be used in digital fitting processing process at the face bow, select some alignments to the scanning model of difference.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic view of the novel face bow structure of the present invention, which comprises a cross-shaped main body and a clamping arm;

fig. 2 is a schematic view of the novel face bow structure of the present invention;

FIG. 3 is a schematic view of the connection structure of the cross-shaped main body and the clamping arm of the present invention;

FIG. 4 is a schematic view of the distribution structure of the protrusions on the cross-shaped main body according to the present invention;

FIG. 5 is a schematic structural view of a closing support or a closing fork; in the figure, (a) shows a closing support and (b) shows a closing fork;

FIG. 6 is a schematic view of the connection structure of the closing support or the closing fork and the connecting member of the present invention; in the figure, (a) shows a plan view, and (b) shows a side view.

Reference numbers and corresponding part names in the drawings: 1-face mask frame, 101-cross main body, 102-clamping arm, 2-connecting piece, 3-groove, 4-protrusion, 5-bolt, 6-shaft sleeve I, 7-shaft sleeve II, 8-polygonal limiting block, 9-polygonal limiting groove and 10-screw.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1

This embodiment provides a novel face bow, including facial cover frame 1, facial cover frame 1 is the cross, can adopt two supports to connect into cruciform structure, or adopt four supports to splice into cruciform structure, or adopt integrated into one piece cruciform structure, and can be standard cruciform structure also can be class cruciform structure, and this embodiment adopts integrated into one piece cruciform structure, like the picture 1 and 2. Four upper, lower, left and right sides four supports of cross face mask frame 1 correspond with nose, chin, left side face and the right side face of patient's face respectively, and face mask frame 1 can adopt four supports centre gripping at facial relevant position, or paste at relevant position, and it can to realize that face mask frame 1 is similar to the face guard and covers the facial region near the oral cavity corresponds. The face mask frame 1 is provided with a connecting piece 2 for connecting a joint fork or a joint support, and the connecting piece 2 is preferably arranged at the center of the cross-shaped mask for detachable connection. The outer surface of the face mask frame 1 is provided with a groove 3 used for containing the radiation-blocking gutta-percha along the cross-shaped trend, and the radiation-blocking gutta-percha is the X-ray radiation-blocking gutta-percha.

The closing support main body is a C-shaped flat plate, and the middle part of the closing support main body is an oval cavity for occluding and recording the overflow of the silicone rubber material and preventing demolding; the fork main body is a C-shaped rod, and a triangular protrusion extends from the inner side of the fork main body and is used for fixing the fork on a wax dyke in the mouth of a patient without the dental jaw

Example 2

In a further improvement on embodiment 1, the groove 3 for accommodating the radiation blocking gutta-percha can be a continuous cross-shaped groove. In the embodiment, a plurality of mutually independent grooves are regularly distributed on the face mask frame 1 along the cross-shaped trend to form a cross shape, and the notch shape of each groove 3 is of a polygonal structure; further preferably, the notch shape of the groove 3 includes a triangle and a quadrangle, and the grooves 3 having the triangular notch shape and the grooves 3 having the quadrangular notch shape are alternately distributed, as shown in fig. 1.

Example 3

The face mask frame is further improved on the basis of the embodiment 2, a plurality of protrusions 4 are further arranged on the outer surface of the face mask frame 1, and all the protrusions are distributed in an array along the cross-shaped trend of the face mask frame 1 and are of a city wall type structure; and two rows of protrusions 4 are provided on each of the four legs of the face mask frame 1 as shown in fig. 2.

Example 4

Further improved on the basis of the embodiment 3, two structures for fixing the face mask frame 1 on the face are provided:

the first structure is as follows: as shown in fig. 2, the four brackets of the mask frame 1 are clamped and fixed on the face of a patient through plastic deformation, and each of the four brackets of the mask frame 1 is made of a plastic deformation material or structure, and each bracket can be bent or bent to be subjected to plastic deformation as a whole; or at least one section of each bracket can be plastically deformed to realize clamping and fixing.

The second structure is as follows: as shown in fig. 1 and 3, the mask frame 1 includes a cross-shaped main body 101 and four holding arms 102, the four free ends of the support of the cross-shaped main body 101 are provided with the holding arms 102, the holding arms 102 are rotatably connected with the four free ends of the support of the font-shaped main body 101, and the rotation axis of the holding arms 102 is perpendicular to the axis of the support. Specifically, the free ends of four brackets of the cross-shaped main body 101 are respectively provided with a shaft sleeve I6, one end of the clamping arm 102 is provided with a shaft sleeve II7, and the shaft sleeve I6 and the shaft sleeve II7 are provided with internal threads; the bolt 5 penetrates through the shaft sleeve I6 and the shaft sleeve II7 at the same time and is in threaded connection with the shaft sleeve I6 and the shaft sleeve II7, so that the fixed connection of the bracket and the clamping arm 102 is realized.

In addition, the embodiment provides a specific structure of the connecting piece 2, the connecting piece 2 adopts a connecting rod, one end of the connecting rod is connected with the face cover frame 1, and the other end of the connecting rod is provided with a polygonal limiting block 8; one end of the combined fork or the combined support which is matched with the connecting rod is provided with a polygonal limiting groove 9 matched with the polygonal limiting block 8; polygon spacing groove 9 and 8 joint adaptations of polygon spacing block, and run through polygon spacing block 8 simultaneously through screw 10 and polygon spacing groove 9 after realize closing the fork or close the support and connecting piece 2 fixed connection, polygon spacing block 8 and polygon spacing groove 9 at this place are regular hexagon.

Example 5

Further improved based on the basis of embodiment 4, further comprising a plurality of radiographic markers for fixation at the facial scan point locations; the radiographic markers are fixed to the face and are polygonal in the scanning direction, with a square shape being preferred in this embodiment. In use, a radiographic marker is immobilized on the patient's face at facial immobilization sites including the patient's bilateral condylar process points, the left and/or lateral infraorbital foramen points, the chin site, and the frontal vertex site.

Example 6

Example 5 provides the application principle of the novel facebow: the face arch shape is shown in fig. 1, and the specific application method is as follows:

s1, injecting X-ray radiation-resistant gutta-percha into the grooves on the cross-shaped main body and the clamping arm.

S2, fixing the radiographic marker on the face of the patient. Specifically, a square radiographic marker is affixed to the lateral condylar process point, the left or right infraorbital foramen point of the patient for indicating the orbital-ear plane-the virtual jaw frame plane; three points, which are not easy to shift, of the skin at the top of the forehead of a patient are pasted with square radiographic markers for fitting all the scans in 3D software; three points, where the chin skin of a patient is not easy to shift, are pasted with a square radiographic marker, and the lower jaw is transferred with non-high precision and used for analyzing the relationship between the lips and the teeth during smiling and laughing. Wherein, the three sites of the chin and the three sites of the forehead are all arranged in a triangle.

And S3, wearing the novel face bow for the patient. Specifically, the method comprises the following steps:

(1) for a patient with a dental jaw: and (5) printing a silicon rubber occlusion recording material above the closing support, and recording the maxillary dentition form of the patient. The novel face bow and the closing support are fixed by screwing the screw. Putting the maxillary dentition occlusion record back into the mouth of the patient, adjusting four clamping arms of the novel face bow to be close to the corresponding positions of the face of the patient without blocking after confirming to be in place, and finally screwing the bolts to fix the angle;

(2) for edentulous patients: close the dyke through the wax and resume patient's upper and lower jaw vertical distance, insert the fork that closes that scalds hot on the dyke is closed to upper jaw wax, wait to cool off fixed back, with novel face bow with close the fork and fix through screwing up the screw. Putting the upper and lower jaw wax dyke into the mouth of a patient, adjusting the four clamping arms of the face bow to be close to the corresponding positions of the face of the patient without blocking after confirming the position, and finally screwing the bolts to fix the angle.

S4, acquiring a face scanning model with a face bow worn by the patient and a face scanning model without the face bow worn by the patient through face scanning; specifically, the method comprises the following steps:

(1) for a patient with a dental jaw: the face bow is worn firstly, and a face scan model of the face bow is obtained. Then, taking the face of the face bow to sweep, and obtaining a face sweeping model without wearing the face bow; specifically, the patient can be ordered to shoot a face scan when biting to the cusp staggered position, smiling and laughing, and a face scan model in a smiling state, a face scan model in a smiling state and a face scan model in a cusp staggered position state of upper and lower dentition of the patient are correspondingly obtained.

(2) For edentulous patients: the face bow is worn firstly, and a face scan model of the face bow is obtained. And then loosening screws at the joint of the face bow and the closing fork, taking down the face bow, and keeping the closing fork to sweep the inner surface of the wax closing embankment to obtain a face sweeping model without wearing the face bow.

S5, acquiring an upper jaw dentition model, a lower jaw dentition model and a bite model of the upper jaw dentition and the lower jaw dentition of a patient under the condition of not wearing a face arch through mouth scanning, wherein the bite relationship in the bite model comprises protrusive bite, or the bite relationship comprises protrusive bite and left and right side bite; in addition, a face bow integral model connected with a closing support/closing fork is obtained through mouth scanning. Specifically, the method comprises the following steps:

(1) for a patient with a dental jaw: and taking out the combined support and the face bow, and performing mouth scanning or die scanning on the whole face bow with the combined support to obtain the face bow integral model connected with the combined support/combined fork. And carrying out mouth-scanning occlusion on the upper and lower jaw dentitions and the cusp in a staggered manner, carrying out protrusion occlusion, and carrying out left and right side occlusion to obtain an upper jaw dentition model, a lower jaw dentition model and an occlusion model of the upper jaw dentition and the lower jaw dentition of the patient under the condition of not wearing a face arch.

(2) For edentulous patients: and taking out the wax levee closing fork, reconnecting the face bow with the closing fork, and performing integral mouth sweeping after powder spraying on the integral surface of the face bow to obtain the integral face bow model connected with the closing support/closing fork. And the patient's upper and lower jaws are mouth-swept.

S6, shooting CBCT: CBCT is shot after wearing the face bow.

Example 7

Example 5 provides the application principle of the novel facebow: the virtual jaw position relationship transfer operation is performed based on steps S1-S5 in embodiment 6, and the specific steps are as follows:

s11, fitting a face scanning model wearing a face bow and an integral face bow model according to the common cross shape of the novel face bow;

s12, fitting the maxillary dentition model to the face arch integral model according to occlusion records of the maxillary dentition of the patient on the face arch closing support in the face scanning process, and realizing the fitting of the maxillary dentition to the face scanning model wearing the face arch;

s13, determining a hinge shaft and a jaw frame plane of the virtual jaw frame according to scanning points of condylar convex points at two sides and lower foramen points at the left and/or side orbits obtained by surface scanning;

s14, matching a lower jaw dentition model with the upper jaw dentition model according to the dental cusp cross malocclusion position relation of the upper jaw dentition and the lower jaw dentition obtained by oral scanning to obtain the position relation of the upper jaw dentition and the lower jaw dentition with the hinge shaft and the jaw frame plane, and finally obtaining the preliminary virtual jaw position relation transfer.

S15, correspondingly matching the lower jaw dentition with the upper jaw dentition in the virtual jaw position relation according to occlusion models of the upper jaw dentition and the lower jaw dentition, namely the protrusive occlusion and the left and right side occlusion, and calculating a protrusive condylar guide and a side condylar guide; or, calculating the anterior condylar guidance only according to the anterior occlusal alignment mandibular dentition model, and then calculating the lateral condylar guidance according to the anterior condylar guidance; and finally, obtaining the semi-adjustable virtual jaw position relation transfer.

Example 8

Example 5 provides the application principle of the novel facebow: the operation of the firmware virtual patient is performed based on the steps S1-S5 in example 6, including the steps of:

s21, fitting a face scanning model wearing a face bow and an integral face bow model according to the common cross shape of the novel face bow;

s22, fitting the maxillary dentition model to the face arch integral model according to occlusion records of the maxillary dentition of the patient on the face arch closing support in the face scanning process, and realizing the fitting of the maxillary dentition to the face scanning model wearing the face arch;

and S23, fitting a facial scan model without a facial arch and the facial scan model with the facial arch and the maxillary dentition according to the scan points of the three sites at the top of the forehead, wherein the facial scan model with the maxillary dentition is obtained in the step S22, and fitting the maxillary dentition to the facial scan model without the facial arch, wherein the facial scan model without the facial arch comprises a facial scan model with upper and lower dentitions occluded to a cusp staggered position state, a facial scan model with a smile state and a facial scan model with a smile state.

S24, matching the lower jaw dentition model with the upper jaw dentition model according to a model obtained by oral scanning when the upper and lower dentitions of the patient are occluded to the cusps in a staggered state, fitting the lower jaw dentition to a surface scanning model of the face-worn arch, and obtaining the position relation of the lower jaw dentition and the chin three-point scanning points.

And S25, fitting the position relation of the mandibular dentition and the chin point scanning points with a smile state model and/or a smile state model obtained by non-wearing bow-face scanning according to the position relation of the mandibular dentition and the chin three-point scanning points obtained in the step S24, and realizing transferring the mandibular dentition in smile and laugh to the smile state model and/or the smile state model without wearing bow-face scanning. Accordingly, a relatively complete virtual patient is constructed, the 3D smile line of the patient is evaluated, and the design and manufacture of the prosthesis are guided.

Example 9

Example 5 provides the application principle of the novel facebow: the combination of the fitting area scan and the CBCT was achieved based on example 6: the patient CBCT can be fitted into the facescan model by fitting the patient donning arch and donning arch CBCT through the common cement gum block points on the cruciate arch, in the order of operation S1, step S3, step S4 and step S6.

Based on examples 6-9, the combination of fitting the face scan and CBCT was achieved.

In conclusion, the utility model provides a novel face bow can construct a complete virtual patient to in the clinical in-process of oral cavity restoration, do benefit to and realize following technological effect:

(1) the method comprises the steps of transferring a maxillary dentition model of a patient into a face scanning model by using a face bow, transferring a mandibular dentition model of the patient into the face scanning model according to three points of a mandible and a chin, evaluating smile lines of the patient when the patient smiles and laughs from a three-dimensional angle, guiding the manufacture of a prosthesis and guiding the trimming of gingiva by the designed prosthesis, which is very important for patients with aesthetic restoration of anterior teeth and aesthetic planting. The traditional beautiful wax pattern can only partially guide the manufacture of the final restoration, and the relationship between the teeth and the lips of a patient cannot be seen; the 2D digital smile design commonly used at present is mostly used for doctor-patient communication, and has little guiding value for the manufacture of the final restoration. The face bow perfectly combines the advantages of the two and solves the defects, can show the design of the restoration body and the relationship between the teeth and the lips to a patient in all directions from a three-dimensional level, and simultaneously outputs stl files to directly print or cut out temporary teeth or final restoration bodies.

(2) Similar to the semi-adjustable jaw frame, the maxillary dentition model of the patient is transferred into the face scan model, and the virtual jaw frame plane and the hinge axis are determined through the square mark points attached to the left and right lateral condyles and the left/right infraorbital holes, so that the maxillary dentition model of the patient can be transferred into the virtual jaw frame. And then transferring the mandibular dentition model to the virtual jaw frame according to the staggered occlusion. And (3) the protracted condylar guidance is calculated by the protracted occlusion recorded by the oral scan and aligning the mandibular dentition position in the state again, and the lateral condylar guidance is calculated according to a formula to complete the transfer of the semi-adjustable virtual jaw frame. The clinical operation process of this mode is quick, and the patient experience is better, and the data processing in later stage is simple simultaneously.

(3) In the current digital guide plate design, only the median occlusion of upper and lower jaws is usually used as a reference when arranging the virtual prosthesis, and the method is relatively inaccurate. Especially for patients who implant the anterior teeth in aesthetic sense, the restoration is very important as the guide, and the accurate restoration design can accurately indicate the placement of the implant and the abutment. The face bow can combine the face scanning, mouth scanning and CBCT of a patient into a whole, a restoration body is directly designed in a virtual patient mouth according to the relationship between lips and teeth and the occlusion relationship, then the restoration body is used as a guide to accurately adjust an implant body and a base platform, and finally a guide plate is generated.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (11)

1. A novel face bow comprises a face cover frame (1), and is characterized in that the face cover frame (1) is in a cross shape, and a connecting piece (2) for connecting a joint fork or a joint support is arranged on the face cover frame (1); and a groove (3) for accommodating the radiation-blocking gutta-percha is arranged on the outer surface of the face mask frame (1) along the cross-shaped trend.

2. A new facebow, as in claim 1, characterized in that said grooves (3) for the exit-stop gutta-percha are continuous cruciform grooves or are regularly distributed in a cruciform shape with several independent grooves.

3. A new facebow according to claim 2, characterised in that said grooves (3) for the housing of the retardant gutta-percha are a plurality of independent grooves regularly distributed in a cross shape; and the notch shape of each groove (3) is a polygonal structure.

4. A new facebow according to claim 3, characterised in that the notch shape of the groove (3) comprises triangle and quadrilateral; and the grooves (3) with triangular notches and the grooves (3) with quadrangular notches are alternately distributed.

5. The novel face bow as claimed in claim 1, wherein the face mask frame (1) is further provided with a plurality of protrusions (4) on the outer surface, and all the protrusions are distributed along the crisscross direction of the face mask frame (1) in an array manner and are of a city wall type structure.

6. A novel facebow as claimed in claim 1, wherein the four legs of the mask frame (1) are held on the patient's face by plastic deformation clamps.

7. A novel facebow as claimed in claim 1, characterized in that the facemask holder (1) comprises a cross-shaped body (101) and a clamping arm (102), the clamping arm (102) is arranged at each of the four free ends of the cross-shaped body (101), the clamping arm (102) is rotatably connected with the four free ends of the support of the font-shaped body (101), and the rotation axis of the clamping arm (102) is perpendicular to the axis of the support.

8. The novel facebow as claimed in claim 7, wherein the four free ends of the bracket of the cross-shaped main body (101) are provided with a shaft sleeve I (6), one end of the clamping arm (102) is provided with a shaft sleeve II (7), and the shaft sleeve I (6) or the shaft sleeve II (7) is provided with an internal thread; the bolt (5) penetrates through the shaft sleeve I (6) and the shaft sleeve II (7) simultaneously and is in threaded connection with the shaft sleeve I (6) or the shaft sleeve II (7), so that the support is fixedly connected with the clamping arm (102).

9. The novel face bow as claimed in claim 1, wherein the connecting member (2) is a connecting rod, one end of the connecting rod is connected with the face mask frame (1), and the other end of the connecting rod is provided with a polygonal limiting block (8); one end of the combined fork or the combined support which is matched with the connecting rod is provided with a polygonal limiting groove (9) matched with the polygonal limiting block (8); polygon spacing groove (9) and polygon stopper (8) joint adaptation, and run through polygon stopper (8) and polygon spacing groove (9) simultaneously through screw (10) and realize closing the fork or close and hold in the palm and connecting piece (2) fixed connection.

10. A novel facebow according to any one of claims 1 to 9, further comprising a plurality of radiographic markers for fixation at the location of the facial scan points.

11. The novel facebow of claim 10, wherein said radiographic markers are fixed to the face and are square in the scanning direction.

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