Scanning device for intraoral scanning post-core repair

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a scanning device for intraoral scanning post-nucleus repair. Comprising a pile path forming drill and a scanning rod, the pile path forming drill comprises a cutting part, a first rod part and a connecting part which are fixedly connected in sequence, the cutting part is a double-taper triangular-prism-shaped tool bit, the double-taper triangular-prism-shaped tool bit is spirally arranged in the axial direction, the cutting part comprises a near-tip-end part and a far-tip-end part, the taper angle of the near-tip-end part is 10 + / -1 degrees, and the taper angle of the far-tip-end part is 10 + / -1 degrees. The cone angle of the far tip end part is 8 + / -1 degrees, the scanning rod comprises a registration part, a second rod part and a pile part which are sequentially connected, the pile part is in a double-taper cone shape with the size matched with that of the cutting part of the pile way forming drill, and depth scale marks are arranged on the surfaces of the cutting part and the pile part. The cutting part of the pile path forming drill is the double-taper triangular-prism-shaped tool bit, so that the inner wall of a root canal can be efficiently cut; the depth scale marks on the drill can accurately control the depth of the drill entering the root canal, and root tip sealing is effectively protected.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a scanning device for intraoral scanning post and core repair. Background Technology

[0002] In prosthodontic treatment, post-core restorations are commonly used to repair residual roots and crowns. Currently, traditional alginate or silicone rubber impression materials are used to create impressions for these restorations. This type of impression technique has a poor patient experience, is highly sensitive, and involves a cumbersome process. The accuracy of the impression and the quality of the model pouring directly affect the accuracy of the final post-core fabrication. Currently, the clinical fabrication of digital post-cores mainly involves using optical scanning equipment to scan the silicone rubber impression of the post-core restoration to obtain a digital model, and then completing the digital design and fabrication of the restoration. Essentially, it is still a traditional impression technique.

[0003] Current post-core drills used clinically suffer from poor cutting performance and lack precise scale markings, making them inadequate for precision root canal treatment techniques. Existing patents (such as CN209629865U and CN213758642U) struggle to accurately measure the depth of penetration into the root canal, and their scales are prone to wear. Pre-made resin post-core scanning rods have been available for over a decade, but acquiring data from the scanning rod via printing software is problematic. Their shape and diameter do not match the clinically prepared post-core morphology, and the depth of penetration is uncertain, making it difficult to obtain the actual post-core morphology. This results in poor post-core suitability and limited clinical application. Existing patents (such as CN212395075U and CN217066644U) lack matching post-core drills, leading to a mismatch between the prepared post-core morphology and the scanning rod shape, resulting in deviations in the acquired three-dimensional post-core data. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model discloses a scanning device for intraoral scanning post-core repair, and specifically discloses the following technical solutions:

[0005] A scanning device for intraoral scanning of post and core repair includes a post forming drill and a scanning rod. The post forming drill includes a cutting part, a first rod part, and a connecting part that are fixedly connected in sequence. The cutting part is a double-tapered triangular cutter head that is spirally arranged along the axial direction. The cutting part includes a near-tip part and a far-tip part. The taper angle of the near-tip part is 10°±1°, and the taper angle of the far-tip part is 8°±1°. The scanning rod includes a registration part, a second rod part, and a post part that are connected in sequence. The post part is a double-tapered cone with dimensions adapted to the cutting part of the post forming drill. Depth scale lines are provided on the surfaces of both the cutting part and the post part.

[0006] Furthermore, the first rod has a hexagonal prism structure.

[0007] Furthermore, the registration part is a cylinder, and the diameter of the registration part is equal to the maximum diameter of the pile.

[0008] Furthermore, the graduation value of the depth scale line is 1 mm.

[0009] Furthermore, the scanning rod is made of photosensitive resin material.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] The cutting part of the post-forming drill in this invention is a double-tapered triangular cutter head, which can efficiently cut the inner wall of the root canal; the cut debris can be stored in the groove between the cutter edges, which does not hinder the movement of the post-forming drill towards the root tip; the post-forming drill forms a double-tapered post while cutting the root canal wall; the depth scale on the drill can accurately control the depth of the drill entering the root canal, effectively protecting the root tip closure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the pile road forming drill of this utility model.

[0013] Figure 2 This is a schematic diagram of the scanning rod in this utility model.

[0014] Figure 3 This is a top view of the pile road forming drill of this utility model.

[0015] 1-Pile forming drill, 11-Connecting part, 12-First rod part, 13-Cutting part, 131-Near tip part, 132-Far tip part, 2-Scanning rod, 21-Registration part, 22-Second rod part, 23-Pile part. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figure 1-3A scanning device for intraoral scanning of post and core repair includes a post forming drill 1 and a scanning rod 2. The post forming drill 1 includes a cutting part 13, a first rod part 12 and a connecting part 11 that are fixedly connected in sequence. The cutting part 13 is a double-tapered triangular cutter head that is spirally arranged along the axial direction. The cutting part 13 includes a near tip part 131 and a far tip part 132. The taper angle of the near tip part 131 is 10°±1° and the taper angle of the far tip part 132 is 8°±1°. The scanning rod 2 includes a registration part 21, a second rod part 22 and a post part 23 that are connected in sequence. The post part 23 is a double-tapered cone with dimensions adapted to the cutting part 13 of the post forming drill. Depth scale lines are provided on the surfaces of both the cutting part 13 and the post part 23.

[0018] In this embodiment, the connecting part 11 is used to connect with the dental handpiece head, and the first rod part 12 serves to connect the connecting part 11 and the cutting part 13.

[0019] In this embodiment, the pile forming drill 1 is divided into anterior and posterior teeth. The length of the first rod 12 of the pile forming drill 1 for the anterior teeth is 5mm ± 0.5mm, and the length of the first rod 12 of the pile forming drill 1 for the posterior teeth is 2mm ± 0.5mm.

[0020] In this embodiment, the depth scale lines on the surfaces of the cutting part 13 and the pile part 23 are laser etched to prevent them from becoming illegible after wear.

[0021] In this embodiment, the first rod 12 is a hexagonal prism structure, which can prevent rotational slippage during clamping.

[0022] In this embodiment, the registration part 21 is a cylinder, and the diameter of the registration part 21 is equal to the maximum diameter of the pile part 23.

[0023] In this embodiment, the scanning rod 2 is divided into one for the front teeth and one for the back teeth. The length of the second rod portion 22 of the scanning rod 2 for the front teeth is 5mm ± 0.5mm, and the length of the second rod portion 22 of the scanning rod 2 for the back teeth is 2mm ± 0.5mm.

[0024] In this embodiment, a pile forming drill 1 and a scanning rod 2 with the same pile diameter and cutting part diameter are used together.

[0025] In this embodiment, the depth scale line is divided into 1mm increments.

[0026] In this embodiment, the scanning rod 2 is designed with a virtual three-dimensional data package, which can be imported into current clinical dental CAD software for use.

[0027] In this embodiment, the pile forming drill 1 is made of alloy casting or metal laser printing.

[0028] In this embodiment, the scanning rod 2 is made of photosensitive resin material and manufactured using CAM technology.

[0029] In use, the post-forming drill 1 and its accompanying scanning rod 2 of this invention allow the dentist to design the diameter and depth of the post-forming channel based on the imaging data of the abutment tooth to be restored, determining the diameter and position of the depth graduation line at the termination point of the post-forming drill 1. The dentist first uses a G-drill to clear the abutment tooth after root canal treatment to the designed length of the post-forming channel. Then, the dentist holds the first rod 12 of the post-forming drill 1, inserts the connecting part 11 into the dental low-speed handpiece head, and allows the cutting part 13 tip to enter the root canal orifice. The dentist advances the drill along the root canal axis at 1000 rpm, pausing for 1 second every 2 mm to remove debris from the cutting edge. The drill stops when the pre-determined depth graduation line is flush with the root canal orifice, ensuring a depth error ≤ 0.2 mm. The post-forming drill 1 is used at low speed, progressively, to prepare the root canal to the position of the set depth graduation line along the root canal axis. After rinsing the root canal, the scanning rod 2, which is matched with the post-forming drill 1, is inserted into the prepared post channel. The registration part 21 of the scanning rod 2 has no directional design. After the dentist checks that the position of the depth scale line of the scanning rod 2 is consistent with the position of the depth scale line of the post-forming drill 1, a programmed scan is performed using an intraoral scanning device. In the denture design software, the registration part 21 of the scanning rod 2 is registered at a single point with the corresponding model of digital scanning rod 2 registration part 21 in the software to obtain the three-dimensional data of the post channel. Clinical testing shows that the cutting efficiency of this utility model's double-tapered triangular cutting tip is improved by 30% and the amount of debris residue is reduced by 50% compared with the traditional single-tapered design; the depth scale line enables depth control accuracy to reach ±0.1mm.

[0030] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An intraoral scanning device for scanning a post core restoration, characterized by, The pile channel forming drill comprises a cutting part, a first rod part and a connecting part which are sequentially fixedly connected, the cutting part is a double-taper three-prism-shaped cutter head, the double-taper three-prism-shaped cutter head is spirally arranged along an axial direction, the cutting part comprises a proximal tip part and a distal tip part, a taper angle of the proximal tip part is 10°±1°, a taper angle of the distal tip part is 8°±1°, the scanning rod comprises a registration part, a second rod part and a pile part which are sequentially connected, the pile part is a double-taper conical shape with a size matched with the cutting part of the pile channel forming drill, and surfaces of the cutting part and the pile part are provided with depth scale lines.

2. The scanning device for in-oral scanning of post core restoration according to claim 1, characterized in that, The first rod part is a hexagonal prism structure.

3. The scanning device for in-oral scanning of post core restoration according to claim 1, wherein, The registration part is a cylinder, and a diameter of the registration part is equal to a maximum diameter of the pile part.

4. The scanning device for in-oral scanning of post and core restorations according to claim 1, characterized in that A graduation value of the depth scale line is 1mm.

5. The scanning device for in-oral scanning of post and core restorations according to claim 1, characterized in that A material of the scanning rod is a photosensitive resin material.

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