Combined guide plate for removable denture abutment preparation and implant placement and manufacturing method thereof

Abstract

The present invention discloses a combined guide plate for removable denture abutment preparation and implant placement and a manufacturing method thereof. The manufacturing steps include: obtaining a dental arch and alveolar ridge model, and then performing digital scanning on the dental arch, alveolar ridge model, and the oral cavity of the dental arch to obtain a digital model; matching the digital model with the three-dimensional reconstructed alveolar bone model taken by the patient's CBCT to obtain a three-dimensional model of the removable denture base; analyzing and determining the insertion path of the removable denture for the three-dimensional model of the removable denture base, and then manufacturing abutment holes, a guide rod for removable denture abutment preparation, and an implant placement guide ring to obtain a three-dimensional model of the combined guide plate; generating the three-dimensional model of the combined guide plate by a computer and performing 3D resin printing to obtain the combined guide plate for removable denture abutment preparation and implant placement. The combined guide plate prepared by the present invention has the advantages of reducing wear between implant components, enabling the smooth passive insertion and removal of the RPD, slowing down the absorption of the marginal alveolar ridge, and ensuring the service life of the implant during use.

Description

Technical Field

[0001] The present invention relates to the technical field of dentures, and particularly relates to a combined guide plate for preparing abutment teeth and implanting implants of removable dentures and a manufacturing method thereof. Background Art

[0002] Tooth free-end loss is one of the common types of dentition defects in clinical medicine. Generally speaking, the anterior teeth remain and the posterior teeth are missing. Due to the particularity of the tooth loss site, traditional removable partial dentures (RPD) are usually used for restoration. During the restoration process, since there are no natural teeth or bony support structures at the tooth end to provide support or retention for the removable partial denture, the alveolar ridge and mucosa in the tooth loss area are subject to large forces, resulting in obvious toothache and rapid absorption of the alveolar ridge.

[0003] After traditional removable partial dentures are restored, the rest of the removable partial denture is placed on the natural teeth to play a partial supporting role for the removable partial denture. The clasp on the removable partial denture is clamped on the natural teeth to prevent the denture from falling off, which is called retention. At the same time, it can also prevent the removable partial denture from falling off, which is called retention. It also plays a role in preventing the denture from shaking, which is called stability. However, due to the inevitable sinking and swinging instability of the free-end removable partial denture, it will cause certain damage to the abutment teeth through the clasp.

[0004] To improve the above situation, implants are implanted at the free end to add implant assistance to the traditional RPD, and an attachment is used to connect the implant and the RPD to convert the free end into a non-free end. This method is called implant-assisted removable partial denture restoration of free-end dentition defects. It reduces the stress on the alveolar ridge under the rest, slows down the absorption of the alveolar ridge, reduces the pressure on the alveolar mucosa, and thus reduces the degree of tenderness of the alveolar mucosa. According to the different designed positions of the implants, the unsightly clasp can be eliminated and the bad dental arch form can be improved. Compared with simple implant fixed restoration, the number of implants is reduced, greatly alleviating the economic burden of patients.

[0005] However, at present, for implant-assisted removable partial denture restoration of free-end dentition defects, there is a lack of unified preoperative planning for RPD design and implant implantation, resulting in problems that implants do not fully consider issues such as the insertion path and retention undercut of the removable denture, causing major problems in RPD design and implant implantation. The first problem is that when the RPD is inserted and removed along the insertion path direction of the abutment teeth, the male and female components of the implant attachment present different angles of movement, which is bound to cause excessive wear of the male and female components. The second problem is that affected by the implant angle, the RPD cannot be passively inserted and removed smoothly, and excessive lateral forces will be exerted on the abutment teeth during both processes. The third problem is that there is an angle between the implant axis and the biting force direction, resulting in a large lateral force on the implant, which is likely to cause absorption of the surrounding alveolar ridge and even premature loosening and falling off, etc. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a combined guide plate for removable denture abutment preparation and implant placement and a method for making the same, which can unify the relevant information of the natural teeth of the removable denture and the implant information, and effectively and accurately solve the contradictions caused by the separation of traditional removable denture design and abutment preparation and implant surgery.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A combined guide plate for removable denture abutment preparation and implant placement, comprising a model body matching the patient's dentition and alveolar ridge, abutment holes for abutment teeth to pass through are provided on the base, a guide rod for indicating abutment preparation is connected to the base, and a guide ring for controlling the implant placement direction and parallel to the guide rod is provided on the base.

[0009] Furthermore, the distance between the abutment hole and the guide rod is 5-8 mm.

[0010] Furthermore, the base is made of resin.

[0011] A method for manufacturing a combined guide plate for removable denture abutment preparation and implant placement, specifically comprising the following steps:

[0012] Step 1: Prepare the dentition and alveolar ridge model, and then digitally scan the dentition, alveolar ridge model and the dentition mouth to obtain a digital model;

[0013] Step 2: Match the digital model with the CBCT 3D reconstructed alveolar bone model of the patient to obtain a 3D model of the removable denture base;

[0014] Step 3: Analyze and determine the removable denture placement path of the removable denture base three-dimensional model, then make the abutment hole, removable denture abutment preparation guide rod and implant implantation guide ring to obtain the three-dimensional model of the combined guide plate for removable denture abutment preparation and implant implantation;

[0015] Step 4: Generate a three-dimensional model of the combined guide plate for removable denture abutment preparation and implant placement through a computer, and perform 3D resin printing to obtain the combined guide plate for removable denture abutment preparation and implant placement.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1) The combined guide plate prepared by the manufacturing method of the present invention unifies the preparation of the abutment teeth of the removable denture and the implantation of the implant, and is embodied in the form of the same guide plate. First, when the RPD is inserted and removed along the insertion path direction of the abutment teeth, the male and female components of the implant attachment show a non-crossing angle relative movement, minimizing the wear between the components to the greatest extent. Second, the insertion and removal directions of the denture and the implant attachment are the same, and the RPD can be passively inserted and removed smoothly, without causing a large lateral force on the abutment teeth during the above two processes. Finally, the axial direction of the implant and the biting force direction can be coordinated as much as possible, reducing the degree of the implant being subjected to the lateral force, slowing down the absorption of the marginal alveolar ridge to the greatest extent, and ensuring the service life of the implant. It effectively and accurately solves the problems caused by the traditional separate design of the removable denture, the preparation of the abutment teeth, and the implant surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the combined guide plate in the present invention;

[0019] Figure 2 is a flow chart of the manufacture of the combined guide plate in the present invention;

[0020] In the figure: 1 - body, 11 - abutment tooth hole, 12 - guide rod, 13 - guide ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present invention will be further described in detail below with reference to specific embodiments, but it is not limited to the present invention.

[0022] As Figure 1 shown, the present invention provides a combined guide plate for the preparation of the abutment teeth of a removable denture and the implantation of an implant, including a resin base 1 matching the patient's dentition and alveolar ridge. The base 1 is provided with an abutment tooth hole 11 for the abutment teeth to pass through, and a guide rod 12 for indicating the preparation of the abutment teeth is bonded to the base 1. The distance between the abutment tooth hole 11 and the guide rod 12 is 5 - 8 mm; the base 1 is also provided with a guide ring 13 for controlling the implantation direction of the implant to be parallel to the guide rod 12.

[0023] Referring to Figure 2 , the manufacturing method of the combined guide plate specifically includes the following steps;

[0024] Step 1: Prepare a model of the dentition and alveolar ridge, and then perform digital scanning on the model of the dentition, alveolar ridge, and the dentition in the mouth to obtain a digital model.

[0025] Step 2: Match the digital model with the three-dimensional reconstructed alveolar bone model of the CBCT taken by the patient to obtain the three-dimensional model of the resin base 1 of the removable denture.

[0026] Step 3: Analyze and determine the insertion path of the removable denture base 1 in the three-dimensional model, and then fabricate the abutment holes 11, the guide rods 12 for preparing the abutments of the removable denture, and the implant guide rings 13 to obtain a three-dimensional model of the combined guide plate for preparing the abutments of the removable denture and implanting implants.

[0027] Step 4: Generate the combined guide plate for preparing the abutments of the removable denture and implanting implants by computer and perform 3D resin printing to obtain the combined guide plate for preparing the abutments of the removable denture and implanting implants.

[0028] The use of the prepared product is as follows: Wear the above combined guide plate into the patient's mouth to allow the abutment teeth to pass through the abutment holes 11. According to the indication of the guide rods 12 for preparing the abutments, perform the grinding and preparation of the adjacent surfaces of the abutment teeth; perform the implant surgery along the guide rings 13 on the combined guide plate, and ensure that the plane for preparing the abutments of the abutment teeth and the implants are completely parallel through the guide rings 13 on the combined guide plate; after the implants are combined with the alveolar ridge, install the LOCATOR abutment on the implants to fabricate the removable partial denture, and use the nylon buckle on the removable denture base 1 to engage and hold with the LOCATOR abutment on the implant to achieve the retention and stability of the denture.

[0029] In summary, by using this design concept and guided by the combined guide plate for preparing the abutments of the removable denture and implanting implants, the relevant information of the natural teeth of the removable denture and the implant information can be unified and planned. When the RPD is inserted and removed along the insertion path direction of the abutment teeth, the male and female components of the implant attachment present a non-crossed angle relative movement, minimizing the wear between the components to the greatest extent; the insertion and removal directions of the denture and the implant attachment can be unified, and the RPD can be smoothly passively inserted and removed without causing a large lateral force on the abutment teeth during these two processes; the axial direction of the implant and the direction of the occlusal force can be coordinated as much as possible, reducing the degree of lateral force on the implant, slowing down the absorption of the marginal alveolar ridge to the greatest extent, and ensuring the service life of the implant. It effectively and accurately solves the contradictions caused by the traditional separate design of removable dentures, abutment preparation, and implant surgery.

Claims

1. A combined guide plate for removable denture abutment preparation and implant placement, Characterized in that: It includes a base plate (1) made of resin that matches the patient's dentition and alveolar ridge. The base plate (1) is provided with abutment holes (11) for the abutment teeth to pass through. A guide rod (12) for indicating the preparation of the guiding plane for the removable denture abutment teeth is connected to the base plate (1). The distance between the abutment hole (11) and the guide rod (12) is 5-8 mm. The base plate (1) is also provided with a guide ring (13) for controlling the implant placement direction and parallel to the guide rod (12).

2. A manufacturing method of the combined guide plate for removable denture abutment preparation and implant placement according to claim 1, Characterized in that: Specifically includes the following manufacturing steps; Step 1: Make a model of the dentition and alveolar ridge, and then perform digital scanning on the dentition and alveolar ridge models and the dentition in the mouth to obtain a digital model; Step 2: Match the digital model with the CBCT three-dimensional reconstructed alveolar bone model taken by the patient to obtain a three-dimensional model of the removable denture base plate (1); Step 3: Determine the insertion path analysis of the removable denture for the three-dimensional model of the removable denture base plate (1), and then make the abutment hole (11), the guiding rod (12) for the removable denture abutment preparation, and the implant placement guide ring (13) to obtain a three-dimensional model of the combined guide plate for removable denture abutment preparation and implant placement; Step 4: Generate the three-dimensional model of the combined guide plate for removable denture abutment preparation and implant placement by a computer and perform 3D resin printing to obtain the combined guide plate for removable denture abutment preparation and implant placement.

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