Locally-hollowed invisible tooth socket and preparation method thereof

Abstract

The invention discloses a locally hollow invisible tooth socket and a preparation method thereof. A locally-hollowed invisible tooth socket comprises a tooth socket base body, and the tooth socket base body comprises an incisors coating part used for being arranged outside incisors in a sleeving mode and a molars coating part used for being arranged outside molars in a sleeving mode; the incisor tooth coating part and the molar tooth coating part are connected through a transition connecting part, and at least one of the occlusal surface, the tongue side and the lip side appearance high point first gum of the transition connecting part is provided with a hollow structure. According to the tooth socket, a traditional semi-closed tooth socket structure is optimized, and the hollow structure is additionally arranged, so that the vertical growth of teeth is not influenced, the falling of deciduous teeth in the later period and the sprouting of permanent teeth are not influenced, and the tooth socket is suitable for 7-9-year-old patients with deciduous tooth and permanent tooth alternation early correction.

Description

Technical Field

[0001] The present invention relates to the technical field of orthodontics, specifically invisible braces. Background Art

[0002] Orthodontics involves correcting dental and jaw deformities using corrective forces from various sources. Currently, invisible braces are used in dental correction due to their aesthetic appearance, comfort, and ease of oral hygiene maintenance.

[0003] During the treatment with invisible braces, the movement trajectory of the teeth is pre-generated by a computer before the treatment starts. The patient needs to change a pair of invisible braces every 7 - 10 days to complete the continuous movement of the teeth. In this way, the invisible braces move the teeth in small ranges continuously through their elastic corrective force (intraoral force) to achieve the purpose of tooth correction.

[0004] Currently, the most common form of invisible braces on the market is a semi - enclosed outer - sleeve structure that fits over the entire tooth crown. This structure only has an insertion opening for installation, and its lingual, labial, and occlusal surfaces are all closed structures. This semi - enclosed invisible brace will affect the exfoliation of primary teeth and the eruption of permanent teeth in patients undergoing early correction at the age of 7 - 9. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides a locally hollowed - out invisible brace and its preparation method to solve at least one of the above - mentioned technical problems.

[0006] To achieve the above - mentioned purpose, the present invention provides a locally hollowed - out invisible brace, including a brace matrix. It is characterized in that the brace matrix includes an incisor covering part for covering the incisors and a molar covering part for covering the molars;

[0007] The incisor covering part and the molar covering part are connected by a transition connecting part, and at least one of the occlusal surface, lingual side, and labial side high points of the transition connecting part in the gingival direction is provided with a hollow structure.

[0008] By optimizing the traditional semi - enclosed brace structure and adding a hollow structure, the present invention will not affect the vertical growth of teeth, will not affect the exfoliation of primary teeth and the eruption of permanent teeth in the later stage, and is suitable for patients undergoing early correction during the mixed dentition stage at the age of 7 - 9.

[0009] Further preferably, the transition connecting part includes a lingual connecting strip on the lingual side and a buccal connecting strip on the buccal side. The two ends of the lingual connecting strip are respectively connected to the lingual dentition contact area of the incisor covering part and the lingual dentition contact area of the molar covering part;

[0010] Both ends of the buccal connecting strip are respectively connected to the lingual dentition contact area of the incisor covering part and the lingual dentition contact area of the molar covering part;

[0011] Taking the area where the transition connecting part does not have a lingual connecting strip and the buccal connecting strip as the hollow structure.

[0012] Further preferably, the lingual connecting strip and the dental side connecting strip are force buffer structures that are circumferentially and circuitously bent along the arrangement direction of the dentition;

[0013] The incisor covering part and the molar covering part are provided with a connecting structure for connecting and pulling the elastic band, and the incisor covering part and the molar covering part are connected by the pulling elastic band.

[0014] Through the setting of the pulling elastic band, it is convenient to adjust the pulling force for dental alignment correction, and further realize corrections such as the forward movement of molars.

[0015] Further preferably, a retention structure is provided on the dental appliance base body, and the retention structure is a snap structure for snap-fixing on the dentition or for the positioning protrusion on the opposing dental appliance;

[0016] When the dental appliance base body is the upper dental appliance, the opposing dental appliance refers to the lower dental appliance;

[0017] When the dental appliance base body is the lower dental appliance, the opposing dental appliance refers to the upper dental appliance.

[0018] It is convenient to improve the fixing stability of the dental appliance during external force traction correction.

[0019] Further preferably, a functional accessory is also fixed on the dental appliance base body, and the functional accessory is any one of a docking mechanism for fixing a traction hook, an alignment mechanism, an arch expansion mechanism, a soft palate stimulation mechanism, a vestibular shield mechanism, and an anti-sucking mechanism.

[0020] Further preferably, the docking mechanism is a vertically arranged vertical tube, a hook-shaped body or a rod-shaped structure;

[0021] The vertical tube is located in the buccal area at the connection of adjacent tooth fixation positions on the dental appliance base body, and the vertical tube is used for inserting a traction hook as the traction hook fixation point;

[0022] The rod-shaped structure includes spherical protrusions and connecting rods alternately arranged along the length direction. When the rod-shaped structure is connected to the dental appliance base body, there is a gap for inserting a traction hook between the connecting rod and the dental appliance base body, and the length direction of the rod-shaped structure is vertically arranged or horizontally arranged;

[0023] When the rod-shaped structure is horizontally arranged, the rod-shaped structure is located in the buccal area of the tooth fixation position of the tooth base body;

[0024] When the rod-shaped structure is vertically arranged, the rod-shaped structure is located in the buccal region at the connection of adjacent tooth fixation positions on the dental appliance base.

[0025] Further preferably, the alignment mechanism is a horizontally arranged horizontal tube;

[0026] The horizontal tube is located in the buccal region of the tooth fixation position of the tooth base;

[0027] The horizontal tube is used for inserting an arch wire and serves as a fixed position for the arch wire.

[0028] Further preferably, the arch expansion mechanism includes an arch expansion structure for connecting the molar covering parts on both sides of the incisor covering part;

[0029] The arch expansion structure includes a first molar side connection part, an arch expansion force application part, and a second molar connection part that are sequentially connected along the length direction. The first molar side connection part and the second molar side connection part are respectively connected to the molar covering parts on both sides of the incisor covering part;

[0030] The arch expansion force application part is in a U-shaped, S-shaped or W-shaped structure.

[0031] Further preferably, the soft palate stimulation mechanism includes a support piece for being fixed on the dental appliance base of the upper teeth, and the support piece is connected with a soft palate support plate that extends backward and is used for supporting the soft palate;

[0032] The area of the soft palate support plate for contacting the soft palate is provided with a stimulation convex structure.

[0033] It is convenient to improve the snoring prevention effect by supporting the soft palate.

[0034] Further preferably, the vestibular shield mechanism includes a vestibular shield body for being fixed at the midline position of the dental appliance base of the upper teeth; the protruding part of the vestibular shield body is the lower tooth occlusion area.

[0035] Further preferably, the anti-sucking mechanism includes a stimulation structure located on at least one of the lingual side and the occlusion side of the dental appliance base, and the stimulation structure is a needle-shaped structure or a tooth-shaped structure.

[0036] Further preferably, the dental appliance base includes an upper dental appliance for being fixed on the upper teeth and a lower dental appliance for being fixed on the lower teeth;

[0037] The molar covering parts of the upper dental appliance and the lower dental appliance are detachably clamped or connected by an easily bendable connecting piece;

[0038] The incisor covering parts of the upper dental appliance and the lower dental appliance are connected by a detachable connection structure;

[0039] A heightening block is fixed on the occlusal side of the molar covering part of the lower dental appliance or the molar covering part of the lower dental appliance.

[0040] It is convenient to realize the orthodontic effect of the activator by reducing the thickness of the heightening block in different orthodontic cycles. This device adopts the structure of a dental appliance, which greatly improves the comfort of users compared with the traditional structure that needs to cooperate with a traction arch.

[0041] Further preferably, an avoidance hole for avoiding the elongated teeth is arranged on the occlusal surface of the transition connecting part, and the avoidance hole is a hollow structure;

[0042] It also includes a counter dental appliance that cooperates with the dental appliance matrix. A force-applying protrusion protruding toward the dental appliance matrix side is arranged on the counter dental appliance; spring slots for detachably installing springs are symmetrically installed at positions adjacent to the force-applying protrusion on the counter dental appliance. The spring slots are used for detachably connecting springs, and the springs are used to be clamped between the inclined teeth and the spring slots.

[0043] The force-applying protrusion is linked with the spring slots; the force-applying protrusion is longitudinally slidably connected to the counter dental appliance, and a return spring is clamped between the force-applying protrusion and the counter dental appliance;

[0044] Two left-right mirror-symmetrical inclined guide surfaces are arranged at the bottom of the force-applying protrusion; the distance between the two inclined guide surfaces decreases from top to bottom. The inclined guide surfaces are slidably connected to the spring slots, and the spring slots are transversely slidably connected to the counter dental appliance;

[0045] When the force-applying protrusion moves downward, the distance between the two spring slots increases;

[0046] When the force-applying protrusion is in a non-force state, the return spring pushes up the force-applying protrusion, and the distance between the two spring slots decreases.

[0047] A preparation method of a locally hollow invisible dental appliance is characterized by comprising the following steps:

[0048] Step 1, performing a CT scan to obtain the three-dimensional data of the patient's oral cavity;

[0049] Step 2, importing the three-dimensional data of the patient's oral cavity obtained in Step 1 into three-dimensional digital orthodontic software to reconstruct the patient's tooth model;

[0050] In the three-dimensional digital orthodontic software, the tooth roots are separated from the entire tooth tissue image to obtain each independent tooth model, that is, the original tooth state;

[0051] In the three-dimensional digital orthodontic software, the teeth to be corrected are aligned, and the final aligned tooth state is generated. At the same time, the geometric models of the tooth layouts at different stages of the step-by-step orthodontic treatment plan are obtained;

[0052] Step 3: Select the area of the transition connection part in the geometric model of tooth layout at different stages of the step-by-step orthodontic treatment plan, and set a hollow structure in the area of the transition connection part;

[0053] Meanwhile, select the shape of the hollow structure from the 3D database, and set the dimensional parameter information for the hollow structure corresponding to the shape;

[0054] Meanwhile, select functional attachments from the 3D database and add them to the geometric model of tooth layout;

[0055] Obtain the final printing model data;

[0056] Step 4: Import the final printing model data into a stereolithography 3D printer to print the invisible dental braces.

[0057] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0058] 1) By optimizing the traditional semi-closed dental brace structure and adding a hollow structure, the present invention will not affect the vertical growth of teeth and the establishment of occlusion, will not affect the exfoliation of primary teeth and the eruption of permanent teeth in the later stage, and ensures that the maxilla and mandible can grow and develop normally after the normal occlusion is established, and is applicable to patients aged 7-9 years old who are in the early stage of mixed dentition correction.

[0059] 2) By means of 3D printing, the present invention realizes the customized requirements for different types of dental brace structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a schematic structural diagram of Specific Embodiment 1 of the present invention;

[0061] Figure 2 It is a schematic structural diagram of Specific Embodiment 2 of the present invention;

[0062] Figure 3 It is a schematic structural diagram of Specific Embodiment 4 of the present invention;

[0063] Figure 4 It is another schematic structural diagram of Specific Embodiment 4 of the present invention;

[0064] Figure 5 It is another schematic structural diagram of Specific Embodiment 4 of the present invention;

[0065] Figure 6 It is a schematic structural diagram of Specific Embodiment 4 of the present invention;

[0066] Figure 7 For the present invention Figure 6 Schematic diagram of another state of the structure;

[0067] Figure 8 It is a schematic structural diagram of Specific Embodiment 4 of the present invention;

[0068] Figure 9 For the present invention Figure 7 Schematic diagram of another state of the structure;

[0069] Figure 10 Schematic diagram of a structure of Specific Embodiment 5 of the present invention;

[0070] Figure 11 Cross-sectional view of Specific Embodiment 5 of the present invention in the use state;

[0071] Figure 12 Cross-sectional view of Specific Embodiment 5 of the present invention;

[0072] Figure 13 Schematic diagram of a structure of Specific Embodiment 6 of the present invention;

[0073] Figure 14 Schematic diagram of a structure of Specific Embodiment 6 of the present invention;

[0074] Figure 15 Schematic diagram of the structure of the applicable situation of Specific Embodiment 6 of the present invention;

[0075] Figure 16 Schematic diagram of a structure of Specific Embodiment 7 of the present invention.

[0076] In the figure: 1 is the incisor covering part, 2 is the molar covering part, 3 is the transition connection part, 31 is the lingual connection bar, 32 is the buccal connection bar, 33 is the force buffering structure, 4 is the connection structure, 5 is the arch expansion mechanism, 6 is the vertical tube, 7 is the horizontal tube, 81 is the U-shaped groove, 82 is the heightening block, 83 is the easily bendable connecting piece, 84 is the upper dental brace, 85 is the lower dental brace, 86 is the upper clamping piece, 87 is the lower clamping piece, 91 is the support piece, 92 is the soft palate supporting plate, 111 is the pressure column, 1111 is the inclined guide surface, 112 is the spring clamping groove, 113 is the spring, 114 is the avoidance hole, 115 is the silica gel pad, 116 is the reset spring, A is the elongated tooth, B is the inclined tooth. Detailed implementation manners <x

[0077] The present invention will be further described below with reference to the accompanying drawings.

[0078] See Figure 1, Specific Embodiment 1: An invisible dental appliance with partial hollowing, comprising a dental appliance matrix. The dental appliance matrix includes an incisor covering portion 1 for sleeving on incisors and a molar covering portion 2 for sleeving on molars; the incisor covering portion 1 and the molar covering portion 2 are connected by a transition connecting portion 3, and at least one of the occlusal surface, lingual side, and buccal side high points of the transition connecting portion 3 in the gingival direction is provided with a hollow structure. By optimizing the traditional semi-closed dental appliance structure and adding a hollow structure, the vertical growth of teeth is not affected, and the exfoliation of primary teeth and the eruption of permanent teeth in the later stage are not affected. It is suitable for patients aged 7 - 9 years who are in the early stage of mixed dentition and need early orthodontic treatment.

[0079] The hollow structure can be a mesh grille or a window structure.

[0080] The thickness of the adjacent sides of the molar covering portion 2 and the incisor covering portion 1 is greater than the thickness of the remaining areas. This is convenient for improving the strength at the adjacent positions of the two, and is suitable for ensuring the upright growth of teeth when there are missing teeth between the incisor covering portion 1 and the molar covering portion 2.

[0081] The transition connecting portion 3 includes a lingual connecting strip 31 on the lingual side and a buccal connecting strip 32 on the buccal side. The two ends of the lingual connecting strip 31 are respectively connected to the lingual dentition contact area of the incisor covering portion 1 and the lingual dentition contact area of the molar covering portion 2; the two ends of the buccal connecting strip 32 are respectively connected to the lingual dentition contact area of the incisor covering portion 1 and the lingual dentition contact area of the molar covering portion 2; the area where the lingual connecting strip 31 and the buccal connecting strip 32 are not provided in the transition connecting portion 3 is the hollow structure.

[0082] See Figure 2 , Specific Embodiment 2, based on Specific Embodiment 1, the lingual connecting strip and the buccal connecting strip are force buffer structures 33 that are circumferentially bent and detoured along the arrangement direction of the dental arch; the incisor covering portion and the molar covering portion are provided with a connecting structure 4 for connecting and pulling the elastic band, and the incisor covering portion 1 and the molar covering portion 2 are connected by the pulling elastic band. Through the setting of the pulling elastic band, it is convenient to adjust the pulling force for dental arch correction, and thus achieve corrections such as molar protraction. The connecting structure 4 can be an angel button or a vertically arranged tubular structure. The tubular structure is provided with a perforation for passing the pulling elastic band.

[0083] Specific Embodiment 3, based on Specific Embodiment 1, a retention structure is provided on the dental appliance matrix. The retention structure is a snap structure for snap-fixing on the dental arch or positioning protrusions on the opposing dental appliance. This is convenient for improving the fixing stability of the dental appliance during orthodontic correction under external force traction.

[0084] When the dental appliance matrix is the upper dental appliance, the opposing dental appliance refers to the lower dental appliance. When the dental appliance matrix is the lower dental appliance, the opposing dental appliance refers to the upper dental appliance.

[0085] SeeFigure 3 , Specific Embodiment 4. On the basis of Specific Embodiment 1, a functional attachment is further fixed on the dental appliance base body, and the functional attachment is any one of a docking mechanism for fixing a traction hook, an alignment mechanism, an arch expansion mechanism, a soft palate stimulation mechanism, a vestibular shield mechanism, and an anti-sucking mechanism.

[0086] The vestibular shield mechanism includes a vestibular shield body fixed at the midline position of the dental appliance base body for the upper teeth; the protruding part of the vestibular shield body is the lower tooth occlusion area.

[0087] The anti-sucking mechanism includes a stimulation structure located on at least one of the lingual side and the occlusal side of the dental appliance base body, and the stimulation structure is a needle-shaped structure or a tooth-shaped structure.

[0088] See Figure 3 , The docking mechanism is a vertically arranged vertical tube 6, a hook-shaped body or a rod-shaped structure; the vertical tube 6 is located in the buccal area at the connection of adjacent tooth fixation positions on the dental appliance base body, and the vertical tube 6 is used for inserting a traction hook as the traction hook fixation place; the rod-shaped structure includes spherical protrusions and connecting rods alternately arranged along the length direction. When the rod-shaped structure is connected to the dental appliance base body, there is a gap for inserting a traction hook between the connecting rod and the dental appliance base body, and the length direction of the rod-shaped structure is vertically arranged or horizontally arranged; when the rod-shaped structure is horizontally arranged, the rod-shaped structure is located in the buccal area of the tooth fixation position of the tooth base body; when the rod-shaped structure is vertically arranged, the rod-shaped structure is located in the buccal area at the connection of adjacent tooth fixation positions on the dental appliance base body.

[0089] The molar covering part 2 includes a proximal incisor part and a distal incisor part covering different molar areas, the proximal incisor part and the distal incisor part are connected by a bending connection structure, vertical tubes 6 are fixed on the adjacent sides of the proximal incisor part and the distal incisor part, and the proximal incisor part and the distal incisor part are connected by an elastic pulling member passing through the vertical tube. Facilitate molar traction correction. Vertical tubes are also installed on the adjacent side of the incisor covering part and the proximal incisor part. The vertical tubes on the adjacent side of the incisor covering part and the proximal incisor part are connected by an elastic pulling member. Facilitate graded traction.

[0090] See Figure 4 , The alignment mechanism is a horizontally arranged horizontal tube 7; the horizontal tube 7 is located in the buccal area of the tooth fixation position of the tooth base body; the horizontal tube is used for inserting an arch wire as the arch wire fixation place.

[0091] See Figure 5 , The arch expansion mechanism 5 includes an arch expansion structure for connecting the molar covering parts on both sides of the incisor covering part; the arch expansion structure includes a first molar side connection part, an arch expansion force application part, and a second molar connection part sequentially connected along the length direction, and the first molar side connection part and the second molar side connection part are respectively connected to the molar covering parts on both sides of the incisor covering part; the arch expansion force application part is in a U-shaped, S-shaped or W-shaped structure. The molar covering part is provided with a connection structure 4 for connecting a traction rubber band.

[0092] See Figure 6 、 Figure 7 and Figure 8 Figure 8 , the soft palate stimulating mechanism includes a support piece 91 for fixing on the dental appliance base body of the upper teeth A. The support piece 91 is connected with a soft palate supporting plate 92 extending backward and used for supporting the soft palate. The area of the soft palate supporting plate for contacting the soft palate B is provided with a stimulating convex structure, which is convenient for improving the snoring prevention effect by supporting the soft palate B.

[0093] See Figures 9 to 12 Figures 9 to 12 , in Specific Embodiment 5, on the basis of Specific Embodiment 1, the dental appliance base body includes an upper dental appliance 84 for fixing on the upper teeth and a lower dental appliance 85 for fixing on the lower teeth. The molar covering parts of the upper dental appliance 84 and the lower dental appliance 85 are detachably clamped or connected by an easily bendable connecting piece 83. See Figure 9 and Figure 10 Figure 10 , the molar covering parts of the upper dental appliance 84 and the lower dental appliance 85 are connected by an easily bendable connecting piece 83. See Figure 11 and Figure 12 Figure 12 , the molar covering parts of the upper dental appliance 84 and the lower dental appliance 85 are detachably clamped. The occlusal side of the molar covering part of the upper dental appliance 84 is connected with an upper clamping piece 86. The occlusal side of the molar covering part of the lower dental appliance 85 is connected with a lower clamping piece 87.

[0094] The incisor covering parts of the upper dental appliance 84 and the lower dental appliance 85 are connected by a detachable connection structure; a heightening block 82 is fixed on the molar covering part of the lower dental appliance 85 or the occlusal side of the molar covering part of the lower dental appliance 85. It is convenient to realize the correction effect of the activator by reducing the thickness of the heightening block 82 in different correction cycles. The structure of the dental appliance is adopted in this device, which greatly improves the comfort of the user compared with the traditional structure that needs to cooperate with a traction bow. A U-shaped groove 81 with an open upper end is fixed on the incisor covering part of the lower dental appliance 85, and the U-shaped groove 81 is used for embedding and clamping the incisor covering part of the upper dental appliance 84. Through the setting of the heightening block 82, it is convenient to reserve the length of the posterior molars that have not grown in place, and it is convenient for the user to adapt to the tooth occlusion movement after the posterior molars grow in place. The height of the heightening block 82 decreases successively with different correction stages.

[0095] See Figures 13 to 15, Specific Embodiment 6, the occlusal surface of the transition connection part 3 is provided with an avoidance hole 114 for avoiding the elongated tooth A, and the avoidance hole 114 is a hollow structure. It also includes a counterpart dental appliance that cooperates with the dental appliance base body. The counterpart dental appliance is provided with a force application protrusion 111 protruding toward the side of the dental appliance base body; at a position adjacent to the force application protrusion 111 on the counterpart dental appliance, spring slots 112 for detachably installing a spring 113 are symmetrically installed in a mirror image manner. The spring slots 112 are used for detachably connecting the spring, and the spring is used to be clamped between the inclined tooth B and the spring slots 112. The elastic force of the spring is used to generate a straightening thrust on the inclined teeth B on both sides of the tooth loss, and the force application protrusion 111 applies a longitudinal force to the elongated tooth A at the tooth loss position to realize the depression of the elongated tooth. It is applicable to the situation of elongated teeth and inclined teeth caused by missing teeth. The elderly all have missing teeth, and the teeth on both sides of the missing teeth will be inclined (see the inclined tooth B in Figure 4 ), and the opposing teeth will elongate (see the elongated tooth A in Figure 4 ). This form of teeth will hinder implanting or installing dentures. At the same time, it will also affect the posterior tooth occlusion function, and in severe cases, it will aggravate Alzheimer's disease. If the inclined tooth B is straightened and the elongated tooth A is depressed with an orthodontic appliance, the denture can be successfully repaired and the occlusion function can be restored.

[0096] The spring slot 112 is a cylindrical groove, and the bottom of the cylindrical groove is provided with a columnar protrusion extending outward. The spring is sleeved between the cylindrical groove and the columnar protrusion.

[0097] The counterpart dental appliance includes an occlusal part and a lingual part. At a position adjacent to the pressure column on the occlusal surface, an extension part extending toward the gingival side is provided; the extension part is provided with the spring slot 112; the extension part is fixedly connected to the lingual part. Or, the two spring slots 112 are slidably connected to the counterpart dental appliance, and threaded rods with opposite thread directions are respectively connected to the adjacent sides of the two spring slots 112; the threaded rods are threadedly connected to an adjustment sleeve. It is convenient to adjust the distance between the two spring slots 112 through the adjustment sleeve. To realize the switching of the spring elastic force.

[0098] See Figure 16Specific embodiment 6, based on specific embodiment 5, the force-applying protrusion 111 is linked to the spring retaining groove 112. The force-applying protrusion is longitudinally slidably connected to the opponent's braces, and a return spring is sandwiched between the force-applying protrusion and the opponent's braces. The bottom of the force-applying protrusion is provided with two inclined guide surfaces 1111 arranged in left and right mirror symmetry. The spacing between the two inclined guide surfaces 1111 decreases from top to bottom. The inclined guide surfaces 1111 are slidably connected to the spring retaining groove 112, and the spring retaining groove 112 is laterally slidably connected to the opponent's braces. When the force-applying protrusion 111 moves downward, the spacing between the two spring retaining grooves 112 increases; when the force-applying protrusion 111 is not under force, the return spring 116 pushes up the force-applying protrusion 111, and the spacing between the two spring retaining grooves 112 decreases. The inclined guide surfaces and the spring retaining groove are provided with matching T-shaped sliders and T-shaped slide grooves. A curved silicone pad 115 is fixed to the side of the spring 113 away from the spring retaining groove 112. The arc-shaped silicone pad 115 is used to press against the teeth. When the teeth are stretched and the force-applying protrusion is pressed down, the two spring slots can move away from each other, thereby achieving a force on the tilted teeth.

[0099] In embodiment 7, based on specific embodiment 4, a method for preparing a partially hollowed invisible brace comprises the following steps:

[0100] Step 1: Use CT scanning to obtain three-dimensional data of the patient's oral cavity;

[0101] Step 2: Import the patient's oral 3D data obtained in step 1 into 3D digital orthodontic software to reconstruct the patient's tooth model;

[0102] In the three-dimensional digital orthodontic software, the tooth root is separated from the entire tooth tissue image to obtain each independent tooth model, that is, the original tooth state;

[0103] Use 3D digital orthodontic software to align the teeth to be corrected and generate the final aligned tooth state. At the same time, obtain the geometric model of the tooth layout at different stages of the step-by-step correction plan.

[0104] Step 3: Selecting a transition area in the tooth layout geometric model at different stages of the step-by-step correction plan, and setting a hollow structure in the transition area;

[0105] At the same time, the shape of the hollow structure is selected from the 3D database, and the size parameter information of the corresponding hollow structure is set;

[0106] At the same time, functional accessories are selected from the 3D database and added to the tooth layout geometry model;

[0107] Get the final printing model data;

[0108] Step 4: Import the final printing model data into the light-curing 3D printer to print the invisible braces.

[0109] The functional accessory is any one of the docking mechanism for fixing the traction hook, the alignment mechanism, the arch expansion mechanism, the soft palate stimulation mechanism, the vestibular shield mechanism, and the anti-sucking mechanism.

[0110] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An invisible orthodontic appliance with partial hollowing, comprising an appliance matrix, characterized in that, The dental appliance base body includes an incisor covering part for covering the incisors and a molar covering part for covering the molars; A transition connecting part is connected between the incisor covering part and the molar covering part, and at least one of the occlusal surface, the lingual side and the buccal side high point of the transition connecting part in the gingival direction is provided with a hollow structure.

2. The invisible dental appliance with partial hollowing according to claim 1, characterized in that: The transition connecting part includes a lingual connecting strip on the lingual side and a buccal connecting strip on the buccal side. The two ends of the lingual connecting strip are respectively connected to the lingual dentition contact area of the incisor covering part and the lingual dentition contact area of the molar covering part; The two ends of the buccal connecting strip are respectively connected to the lingual dentition contact area of the incisor covering part and the lingual dentition contact area of the molar covering part; Taking the area where the transition connecting part does not have the lingual connecting strip and the buccal connecting strip as the hollow structure.

3. The invisible dental appliance with partial hollowing according to claim 1, wherein: The lingual connecting strip and the buccal connecting strip are force buffer structures that are circumferentially and circuitously bent along the arrangement direction of the dental arch; The incisor covering part and the molar covering part are provided with a connecting structure for connecting a traction elastic band, and the incisor covering part and the molar covering part are connected by the traction elastic band.

4. The invisible dental appliance with partial hollowing according to claim 1, characterized in that: A functional accessory is also fixed on the dental appliance base body, and the functional accessory is any one of a docking mechanism for a fixed traction hook, an alignment mechanism, an arch expansion mechanism, a soft palate stimulation mechanism, a vestibular shield mechanism, and an anti-sucking mechanism.

5. The invisible dental aligner with partial hollowing according to claim 4, characterized in that: The docking mechanism is a vertically arranged vertical tube, a hook-shaped body or a rod-shaped structure; The vertical tube is located in the buccal area at the connection of adjacent tooth fixing positions on the dental appliance base body, and the vertical tube is used for inserting a traction hook as a traction hook fixing place; The rod-shaped structure includes spherical protrusions and connecting rods alternately arranged along the length direction. When the rod-shaped structure is connected to the dental appliance base body, there is a gap for inserting a traction hook between the connecting rod and the dental appliance base body, and the length direction of the rod-shaped structure is vertically arranged or horizontally arranged; When the rod-shaped structure is horizontally arranged, the rod-shaped structure is located in the buccal area of the tooth fixing position of the tooth base body; When the rod-shaped structure is vertically arranged, the rod-shaped structure is located in the buccal area at the connection of adjacent tooth fixing positions on the dental appliance base body.

6. A locally hollowed invisible dental appliance according to claim 4, characterized in that: The alignment mechanism is a horizontally arranged horizontal tube; The horizontal tube is located in the buccal area of the tooth fixing position of the tooth base body; The horizontal tube is used for inserting an arch wire as an arch wire fixing place.

7. A locally hollowed invisible dental appliance according to claim 4, characterized in that: The arch expansion mechanism includes an arch expansion structure for connecting the molar covering parts on both sides of the incisor covering part; The arch expansion structure includes a first molar side connecting part, an arch expansion force application part and a second molar connecting part sequentially connected along the length direction. The first molar side connecting part and the second molar side connecting part are respectively connected to the molar covering parts on both sides of the incisor covering part; The arch expansion force application part is in a U-shaped, S-shaped or W-shaped structure.

8. The invisible dental appliance with partial hollowing according to claim 1, characterized in that: The dental appliance base body includes an upper dental appliance for fixing on the upper teeth and a lower dental appliance for fixing on the lower teeth; The molar covering parts of the upper dental appliance and the lower dental appliance are detachably clamped or connected by an easily bendable connecting piece; The incisor covering parts of the upper dental appliance and the lower dental appliance are connected by a detachable connection structure; A heightening block is fixed on the occlusal side of the molar covering part of the lower dental appliance or the molar covering part of the lower dental appliance.

9. A locally hollowed invisible dental brace according to claim 1, characterized in that: An avoidance hole for avoiding the elongated teeth is arranged on the occlusal surface of the transition connection part, and the avoidance hole is a hollow structure; It further includes a counter dental appliance that cooperates with the dental appliance base body. A force application protrusion protruding toward the dental appliance base body side is arranged on the counter dental appliance; spring slots for detachably installing a spring are symmetrically installed at positions adjacent to the force application protrusion on the counter dental appliance. The spring slots are used for detachably connecting the spring, and the spring is used for being clamped between the inclined tooth and the spring slot; The force application protrusion is linked with the spring slot; the force application protrusion is longitudinally slidably connected to the counter dental appliance, and a return spring is clamped between the force application protrusion and the counter dental appliance; Two obliquely inclined surfaces that are symmetrically arranged left and right are arranged at the bottom of the force application protrusion; the distance between the two obliquely inclined surfaces decreases from top to bottom, and the obliquely inclined surfaces are slidably connected to the spring slot, and the spring slot is horizontally slidably connected to the counter dental appliance; When the force application protrusion moves downward, the distance between the two spring slots increases; When the force application protrusion is in a non-force state, the return spring pushes up the force application protrusion, and the distance between the two spring slots decreases.

10. The preparation method of a locally hollowed invisible dental appliance according to claim 1, characterized in that, It includes the following steps: Step 1, perform a CT scan to obtain the three-dimensional data of the patient's oral cavity; Step 2, import the three-dimensional data of the patient's oral cavity obtained in Step 1 into three-dimensional digital orthodontic software to reconstruct the patient's tooth model; In the three-dimensional digital orthodontic software, the tooth roots are separated from the entire tooth tissue image to obtain each independent tooth model, that is, the original tooth state; In the three-dimensional digital orthodontic software, the teeth to be corrected are arranged neatly, and the final neatly arranged tooth state is generated. At the same time, the geometric models of the tooth layouts at different stages of the step-by-step correction plan are obtained; Step 3, select the area of the transition connection part in the geometric models of the tooth layouts at different stages of the step-by-step correction plan, and set a hollow structure in the area of the transition connection part; At the same time, select the shape of the hollow structure from the 3D database, and set the dimension parameter information of the hollow structure corresponding to the shape; At the same time, select functional accessories from the 3D database and add them to the geometric model of the tooth layout; Obtain the final printed model data; Step 4, import the final printed model data into a stereolithography 3D printer to print the invisible dental appliance.

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