Guiding device for guiding preparation of planting cavity and using method thereof

Abstract

The invention discloses a guide device for guiding preparation of an implant cavity and a use method of the guide device, and belongs to the technical field of oral medical equipment. The guide device comprises a preformed dental crown body, at least one guide ring and a fixing component. The preformed dental crown body is provided with a guide channel penetrating through the preformed dental crown body; the guide ring is detachably arranged in the guide channel, the inner diameter of the guide ring is matched with the diameter of a drill point in the planting tool chain, and the guide ring is used for guiding the drilling direction of the drill point; the fixing part is connected to the preformed dental crown body and is used for stably fixing the preformed dental crown body on adjacent teeth of an odontoprisis area of a patient. According to the invention, the prosthesis is directly converted into the surgical guide plate, so that a real implant operation which takes repair as guidance is realized, the method does not need to depend on complex digital design and manufacturing processes, ensures the high consistency and stability of the direction of the prepared hole in each stage through mechanical constraint, and has the remarkable advantages of low cost, high precision, intuitive and simple operation and the like.

Description

Technical Field

[0001] This invention belongs to the field of oral medical equipment technology, specifically relating to a guide device for guiding the preparation of implant cavity and its usage method. Background Technology

[0002] In the field of dental implantology, the "restoration-oriented" implantation philosophy is widely recognized as the core principle for ensuring that implants achieve ideal three-dimensional positioning, good aesthetic results, and long-term functional stability. To achieve this principle, clinical practice currently relies mainly on technologies such as digital surgical guides, dynamic navigation, and robot-assisted implantation.

[0003] However, these existing technologies have significant limitations. First, they heavily rely on expensive equipment (such as CBCT and 3D printers) and complex digital processes (including data acquisition, virtual design, and guide printing), resulting in high treatment costs and long treatment cycles, making them difficult to implement in primary healthcare institutions. Second, the technologies themselves have an unavoidable chain of errors: for example, the positioning stability of digital guides is limited by the patient's anatomy, intraoperative cooling water mist often affects the clarity of the surgical field, and micro-movements between the guide rings and the drill bit can also introduce operational errors. More importantly, these technologies lack an intuitive preview of the restoration during execution. The surgical guide itself obscures the surgical field, preventing doctors from directly and immediately observing and assessing the future crown's shape and position during cavity preparation. In the anterior region, where aesthetic requirements are extremely high, this "blind operation" increases surgical risks.

[0004] Especially for cases involving single tooth loss, particularly in the anterior aesthetic zone or immediate implantation where high precision is required, there is an urgent clinical need for a simple and reliable device that can directly and intuitively establish the final restoration position intraoperatively and guide precise implant cavity preparation. Current technology cannot adequately meet this need. Summary of the Invention

[0005] Based on the problems existing in the above-mentioned background technology, the present invention proposes a guiding device and method for guiding the preparation of planting holes that is simple in structure, low in cost, intuitive in operation, and can ensure high precision.

[0006] The embodiments of the present invention are implemented as follows: The present invention provides a guiding device for guiding the preparation of implant cavity, which includes multiple pre-formed crown bodies of different types and sizes, multiple guide rings with the same outer diameter but different inner diameters, and multiple fixing components; Each of the pre-formed crown bodies has a vertically penetrating guide channel; multiple guide rings are detachably disposed within the guide channel, and the inner diameter of the multiple guide rings matches the diameter of the drill bit in the implant tool chain; Multiple fixing components are disposed on the preformed crown body for fixing the preformed crown body to the adjacent teeth in the edentulous area.

[0007] Furthermore, the pre-formed crown body is made of a transparent material. Utilizing the material's transparency ensures full visibility of the surgical field. During implant cavity preparation, the dentist can not only see the crown's shape but also observe its relationship to the gingival margin, the drill entry point, and the surrounding tissues through the crown body. This allows for more precise intraoperative judgments and fine-tuning, greatly improving the controllability of the surgery and the predictability of the aesthetic outcome.

[0008] Furthermore, each of the pre-formed crown bodies has a guide wing on its mesial and distal proximal surfaces, and the guide wing is provided with a connecting structure; the fixation component is detachably connected to the guide wing through the connecting structure. A dedicated extension structure (guide wing) is designed on the pre-formed crown body to provide a stable lever arm and connection point. In practice, the guide wing structure is thin and lightweight, does not affect the placement and occlusion of the crown in the edentulous area, and the connecting structure on it provides a physical basis for realizing a modular, detachable fixation scheme, enhancing the system's flexibility and adaptability.

[0009] Furthermore, the fixing component is an elastic retention clip, which is shaped like a "C" or an "S". One end of the elastic retention clip is connected to the connecting structure, and the other end is hung below the lingual protuberance or proximal contact point of the adjacent tooth in the edentulous area.

[0010] Utilizing the deformation and recovery properties of elastic retention clips, and through ingenious structural design (such as the "S" shape for anterior teeth and the "C" shape for posterior teeth), the elastic retention clips can extend beyond the maximum circumference of adjacent teeth and then stably hold within the physiological undercut area of ​​the adjacent teeth using elastic return force. This fixation method provides strong mechanical retention force, ensuring absolute stability of the device during cavity preparation without any wobbling; at the same time, it is completely non-invasive, does not damage the tooth structure of adjacent teeth, conforms to the principles of minimally invasive treatment, and is extremely convenient to disassemble.

[0011] Furthermore, the connection structure is a groove or hole formed on the guide plate wing; the end of the elastic retaining clamp is fixedly connected to the groove or hole.

[0012] Furthermore, the fixation component and the guide plate wing are integrally molded structures. Integrating the functions of the guide plate wing and the fixation component into a prefabricated modular component simplifies the intraoperative assembly steps. The surgeon only needs to select the component of the appropriate size and snap it on directly, avoiding the trouble of adjusting the clips separately, improving surgical efficiency, reducing operational complexity, and facilitating standardized production and quality control.

[0013] Furthermore, a quick-locking structure is provided between the outer wall of the guide ring and the inner wall of the guide channel. This quick-locking structure can be a snap-fit ​​structure, a threaded structure, or a magnetic adsorption structure. Through mechanical interlocking or physical adsorption methods such as snap-fit, threading, or magnetic attraction, the guide ring can be installed and removed quickly and reliably, ensuring that it will not loosen or fall off during high-speed drill bit rotation, thus guaranteeing the stability and safety of the guidance. At the same time, the quick-locking design makes the surgeon's operation process faster and more efficient.

[0014] Furthermore, the guide rings with different inner diameters are distinguished by color coding. The uniform outer diameter of multiple guide rings allows the same pre-formed crown to be fitted with guide rings from all sequences, achieving versatility and simplification of the device. The grading of inner diameters ensures that each step of cavity preparation, from the pilot drill to the final shaping drill, is performed under precise guidance, completely eliminating the "directional drift" problem common in freehand operations. Color coding provides surgeons with a fast and accurate visual identification method during stressful surgical procedures, effectively preventing the use of incorrect guide rings and improving surgical safety and efficiency.

[0015] The present invention also provides a method of using a guiding device for guiding the preparation of planting holes, comprising: Step 1: Select one precast crown body from multiple precast crown bodies that matches the shape and size of the edentulous area; Step 2: Place the selected pre-formed crown body in the edentulous area and fix it stably to the adjacent tooth using the fixing component; Step 3: Install the guide ring, whose inner diameter matches that of the pilot drill, into the guide channel; Step 4: Pass the pilot drill through the guide ring to prepare the initial cavity; Step 5: After the initial cavity preparation is completed, replace the guide ring with one whose inner diameter matches the diameter of the next stage reamer, and continue the cavity preparation. Step 6: After completing the final cavity preparation, remove the guide device.

[0016] In the above method, the concept of "restoration-oriented" is integrated into the preparation of the implantation cavity. Through the process of "crown trial - fixation - step-by-step ring replacement and cavity preparation", the ideal position of the restoration is directly and without deviation to the implantation cavity, forming a precise, intuitive and repeatable technical path, avoiding the cumbersome and error-prone nature of digital processes.

[0017] Compared with existing planting hole preparation methods, the advantages of this invention are: This invention discloses a guiding device and its method for guiding implant cavity preparation. It structurally integrates a "pre-formed crown body," serving as the prototype of the final restoration, with a "guide ring," acting as a surgical guide, through a "guide channel." A "fixation component" then ensures the stable anchoring of the entire device within the surgical area. This combination produces a "what you see is what you get" technical effect: the surgeon can directly see the future crown's shape and position throughout the procedure and use the ideal restoration position established by the crown as an absolute benchmark. The mechanical constraint of the guide ring guides the drill bit, ensuring the accuracy of the cavity preparation direction. Compared to digital surgical guides, this invention eliminates the need for complex and expensive digital processes, significantly reducing costs and operational barriers, while avoiding cumulative errors introduced by data fusion and guide placement. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The above and other objects, features, and advantages of the present invention will become clearer through the accompanying drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not intentionally drawn to scale to actual dimensions; the focus is on illustrating the main points of the invention.

[0019] Figure 1 This is a schematic diagram of a guiding device used to guide the preparation of planting holes.

[0020] Figure 2 This is a schematic diagram of the structure of a pre-formed dental crown.

[0021] Figure 3 This is a schematic diagram of a trench structure for connection.

[0022] Figure 4 This is a schematic diagram of a hole structure for connection.

[0023] Figure 5 A top view of the C-shaped elastic retaining clip.

[0024] Figure 6 A top view of the "S"-shaped structure of the elastic retaining clip.

[0025] The components include: 1. preformed crown body; 2. guide ring; 3. guide plate wing; 4. elastic retention clip; 5. guide channel; 6. connecting structure; and 7. adjacent tooth. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0030] For the first embodiment, please refer to... Figure 1 and Figure 2 As shown, the first embodiment of the present invention provides a guiding device for guiding the preparation of implant cavity, including a preformed crown body 1, a guide ring 2, and a fixing component.

[0031] The pre-formed crown body 1 is preferably made of a transparent medical-grade polymer material (such as transparent polycarbonate, PMMA, etc.), and its shape mimics the anatomical morphology of natural teeth. It can be provided in a series of products covering common maxillary and mandibular tooth positions (such as central incisors, lateral incisors, canines, and premolars) and different sizes (such as S, M, L) according to clinical needs. A cylindrical guide channel 5 is provided in the center of the pre-formed crown body 1, extending from its occlusal surface to the gingival floor. A guide wing 3 is provided on both the mesial and distal proximal surfaces of the pre-formed crown body 1. The guide wing 3 is also preferably made of transparent material and designed to be as thin as possible to ensure that it does not affect the complete placement of the crown in the edentulous area and the occlusal relationship. Figure 3 and Figure 4 As shown, each guide plate wing 3 has a groove or round hole as a connecting structure 6.

[0032] The guide rings 2 are a series of precision-manufactured metal rings, preferably made of surgical stainless steel or titanium alloy. A key design feature is that all guide rings 2 have the same uniform outer diameter to ensure they can all mate with the guide channel 5 of the same pre-formed crown body 1. The inner diameter of the guide rings 2 is precisely matched to the drill bit diameter in a standard implant toolchain; for example, it can include a range of specifications such as 2.0mm (corresponding to a pilot drill), 2.8mm (corresponding to a reamer), and 3.5mm (corresponding to a shaping drill). The guide rings 2 are detachably fixed via a quick-locking structure between their outer wall and the inner wall of the guide channel 5. This quick-locking structure can be a snap-fit ​​structure, a threaded structure, or a magnetic adsorption structure. In this embodiment, a snap-fit ​​structure is preferred. Snap-fit ​​structures are existing technology; for example, a protrusion is provided on the outer wall of the guide ring 2, and a corresponding annular groove is provided on the inner wall of the guide channel 5. A "click" sound is achieved when pressing to lock and unlock the rings. To facilitate identification, guide rings 2 with different inner diameters are color-coded. For example, a purple ring represents 2.0 mm, a green ring represents 2.8 mm, and a blue ring represents 3.5 mm. Color coding provides doctors with a quick and accurate visual identification method during stressful surgical procedures, effectively preventing the use of the wrong guide ring 2 and improving surgical safety and efficiency.

[0033] The fixing component is used to stably anchor the preformed crown body 1 onto the healthy adjacent teeth 7 on both sides of the edentulous area.

[0034] The second embodiment of the present invention provides a guiding device for guiding the preparation of planting holes. This embodiment further defines the first embodiment, with improvements made in how the fixing components are set. For other aspects not mentioned, please refer to the first embodiment or the prior art. Figure 5 and Figure 6 As shown, the fixing component is an elastic retention clip 4, which is made of a material with good elasticity and biocompatibility (such as medical stainless steel or titanium-nickel shape memory alloy). The structure of the elastic retention clip 4 varies depending on the application area. When used for anterior teeth, the elastic retention clip 4 has an "S"-shaped structure, with one end connected to the groove on the guide wing 3 and the other end being an arc-shaped arm for hooking the adjacent tooth 7. When used for posterior teeth, the elastic retention clip 4 can be designed as a wider "C" shape to hold the adjacent tooth 7 tightly. In use, one end of the elastic retention clip 4 is inserted into the groove on the guide wing 3, and then the other end of the elastic retention clip 4 is opened with a needle holder or special tool so that it passes over the largest convex point of the adjacent tooth 7. Then the tool is released, and the elasticity of the material allows it to return to its original position, thus firmly holding it below the undercut area or proximal contact point on the lingual side of the adjacent tooth 7. Each of the mesial and distal surfaces of the precast crown body 1 has an elastic retention clip 4, which together with the precast crown body 1 form a stable three-point support.

[0035] For structures not mentioned in this embodiment, please refer to the prior art or the first embodiment.

[0036] The third embodiment of the present invention provides a guiding device for guiding the preparation of planting holes. This embodiment is a further limitation on the first embodiment. The improvement lies in how to set the fixing components. For other parts not mentioned, please refer to the first embodiment or the prior art.

[0037] The fixation component and the guide plate wing 3 are integrally molded. Integrating the functions of the guide plate wing 3 and the fixation component into a prefabricated modular component simplifies the intraoperative assembly steps. Doctors only need to select the appropriate size component and snap it on directly, avoiding the trouble of adjusting the clips separately, improving surgical efficiency, reducing operational complexity, and facilitating standardized production and quality control.

[0038] In this design, the guide wing 3 and the fixation components are prefabricated as a single, flexible module. This module is connected to the pre-formed crown body 1 (not shown in the figure) via snap-fit ​​or sliding. The dentist selects the appropriate size based on the adjacent tooth 7 before surgery and simply snaps it onto the pre-formed crown body 1; no separate assembly or adjustment is required during surgery, making the operation extremely simple. As a supplementary fixation method, when the unique shape of the adjacent tooth 7 results in insufficient clamping retention, a small, easily removable temporary bond can be made between the guide wing 3 and the adjacent tooth 7 using light-cured flowable resin to enhance stability.

[0039] The fourth embodiment of the present invention provides a method for using a guiding device for guiding the preparation of planting holes, comprising: Step 1: Based on the mesial and distal width of the edentulous space, the gingival-occlusal distance, and the morphology of adjacent teeth, select the pre-formed crown body 1 from the series of products that best matches its shape and size.

[0040] Step 2: Place the selected pre-formed crown body 1 into the edentulous area and manually adjust its labial / lingual and gingival / occlusal positions and axial tilt until the optimal aesthetic and restorative position is achieved (refer to the midline, gingival margin height, labial fullness, etc.). Use the fixation component in the second or third embodiment to hook the selected pre-formed crown body 1 onto the adjacent tooth 7. Gently push the pre-formed crown body 1 to check whether it has achieved a stable connection. If the connection is unstable, use light-cured resin for auxiliary point bonding.

[0041] Step 3: Select the guide ring 2 with the smallest inner diameter (such as the purple ring corresponding to a 2.0mm pilot drill), insert it into the guide channel 5 of the pre-formed crown body 1 and lock it, pass the matching pilot drill through the guide ring 2 and start the implant handpiece to prepare a precise initial implantation hole at the alveolar ridge crest.

[0042] Step 4: Remove the current small inner diameter guide ring 2. According to the surgical plan, select the next sequence (larger inner diameter) guide ring 2 (e.g., the green 2.8mm ring), insert it into the guide channel 5, and lock it. Replace with a matching reamer, pass it through the new guide ring 2, and enlarge and shape the initial cavity. Repeat this "replace guide ring 2 - replace drill bit - prepare cavity" process until the final diameter cavity preparation is complete.

[0043] Step 5: After completing the final cavity preparation, remove all guide rings 2, then loosen the fixing components and remove the entire pre-formed crown body 1 from the mouth. Subsequently, follow the standard implant surgery procedure to insert the implant, install the healing abutment, etc.; if temporary resin bonding is used, gently pry or grind off the bonding points with instruments before removing the device.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A guiding device for guiding the preparation of planting holes, characterized in that, It includes multiple precast crown bodies of different types and sizes, multiple guide rings with the same outer diameter but different inner diameters, and multiple fixing components; Each of the pre-formed crown bodies has a vertically penetrating guide channel; multiple guide rings are detachably disposed within the guide channel, and the inner diameter of the multiple guide rings matches the diameter of the drill bit in the implant tool chain; Multiple fixing components are disposed on the preformed crown body for fixing the preformed crown body to the adjacent teeth in the edentulous area.

2. The guiding device for guiding the preparation of planting holes according to claim 1, characterized in that, The preformed crown body is made of a transparent material.

3. The guiding device for guiding the preparation of planting holes according to claim 1, characterized in that, Each of the pre-formed crown bodies has a guide wing on its mesial, distal, and adjacent surfaces, and the guide wing is provided with a connecting structure; the fixing component is detachably connected to the guide wing through the connecting structure.

4. The guiding device for guiding the preparation of planting holes according to claim 3, characterized in that, The fixing component is an elastic retention clip, which is shaped like a "C" or an "S". One end of the elastic retention clip is connected to the connecting structure, and the other end is hung below the lingual protuberance or proximal contact point of the adjacent tooth in the edentulous area.

5. The guiding device for guiding the preparation of planting holes according to claim 4, characterized in that, The connection structure is a groove or hole formed on the guide plate wing; the end of the elastic retaining clamp is fixedly connected to the groove or hole.

6. The guiding device for guiding the preparation of planting holes according to claim 4, characterized in that, The fixing component and the guide plate wing are integrally formed.

7. The guiding device for guiding the preparation of planting holes according to claim 1, characterized in that, A quick-locking structure is provided between the outer wall of the guide ring and the inner wall of the guide channel. The quick-locking structure is one of a snap-fit ​​structure, a threaded structure, or a magnetic adsorption structure.

8. The guiding device for guiding the preparation of planting holes according to claim 1, characterized in that, The guide rings with different inner diameters are distinguished by color coding.

9. A method of using a guiding device for guiding the preparation of planting holes according to any one of claims 1 to 8, characterized in that, include: Step 1: Select one precast crown body from multiple precast crown bodies that matches the shape and size of the edentulous area; Step 2: Place the selected pre-formed crown body in the edentulous area and fix it stably to the adjacent tooth using the fixing component; Step 3: Install the guide ring, whose inner diameter matches that of the pilot drill, into the guide channel; Step 4: Pass the pilot drill through the guide ring to prepare the initial cavity; Step 5: After the initial cavity preparation is completed, replace the guide ring with one whose inner diameter matches the diameter of the next stage reamer, and continue the cavity preparation. Step 6: After completing the final cavity preparation, remove the guide device.

Images