Nickel-titanium file

Abstract

The present invention relates to a nickel titanium (Ni-Ti) file for use in all fields of dentistry, including root canal therapy (endodontic applications), and in patient treatment procedures associated with root canal therapy. The Ni-Ti file is designed to remove filling residues, pulp and other residual materials from the root canal during pulp treatment.

Description

Technical Field

[0001] This invention relates to a nickel-titanium (Ni-Ti) file for use in various fields of dentistry, including root canal treatment (endodontic applications) and patient treatment procedures related to root canal treatment.

[0002] Specifically, the present invention relates to a nickel-titanium (Ni-Ti) file designed for removing filling residue, pulp and other residual materials from the root canal during endodontic treatment. Background Technology

[0003] Root canal treatment involves removing the coronal and apical pulp, mechanically shaping the root canal, disinfecting the canal, and meticulously filling the canal from the coronal entrance to the apical foramen. One of the most critical factors affecting the success of root canal treatment is the mechanical shaping of the root canal. Shaping is accomplished using various root canal instruments to remove vital pulp, necrotic tissue, and infected dentin from the root canal, ensuring optimal filling by giving the root canal an appropriate taper shape extending from the apex to the coronal. This process removes bacterial biofilm and provides adequate space for antibacterial irrigants and medications to work and for disinfecting the root canal.

[0004] Before modern dentistry, instruments used for accessing the pulp (likely referring to preparation) were used to prepare root canals and cauterize the pulp. For many years, root canal preparation was performed using stainless steel files and reamers. However, root canal shaping using these instruments has been associated with several complications. In particular, shaping narrow and curved root canals is both time-consuming and challenging. Furthermore, errors can occur during the shaping process, such as root canal deviation, apical opening, step formation, perforation, loss of working length due to root canal blockage, root canal straightening, and instrument breakage.

[0005] Establishing the apical stop is challenging in current root canal treatment techniques. When the master cusp (guar gum point, GP) extends beyond the apical region, postoperative sensitivity and certain complications may occur. Therefore, it is necessary to prevent potential complications during the establishment of the apical stop or the calculation of root canal length.

[0006] A review of the prior art identifies EP4023186B1 as an example of prior art. This document relates to a pulp file for dental nerve treatment. The described file is essentially a helical blade designed for placement in a root canal to remove the dental nerve and enlarge the root canal; a head detachably mounted on a rotary electric device; and a connecting portion extending a predetermined length between the head and the blade, the diameter of which is smaller than the diameter of the contact ends of the blade and the head. The purpose of this thin connecting portion is to concentrate stress during rotation on the connector rather than on the blade. However, the invention does not mention any improvements designed to prevent complications that may occur during apical stop formation or root canal length calculation.

[0007] Therefore, the existence of these problems and the inadequacy of existing solutions necessitate improvements in this technical field. Summary of the Invention

[0008] This invention relates to a nickel-titanium (Ni-Ti) file that eliminates the aforementioned drawbacks and brings new advantages to the related technical field.

[0009] The main objective of this invention is to provide a nickel-titanium (Ni-Ti) file that helps remove filling residue, pulp, and other residual materials from the root canal during endodontic treatment.

[0010] Another object of the present invention is to provide a nickel-titanium (Ni-Ti) file that ensures sufficient pull-back in the apical region (adaptability of gutta-percha during root canal filling).

[0011] Another object of the present invention is to provide a nickel-titanium (Ni-Ti) file that can remove debris from the root canal during the forming process.

[0012] Another object of the present invention is to provide a nickel-titanium (Ni-Ti) file that has significantly more efficient cutting efficiency and debris removal capability compared with existing systems.

[0013] Another object of the present invention is to provide a nickel-titanium (Ni-Ti) file that can maintain the internal morphology of the root canal for anatomical shaping, making it suitable for root canal structure and anatomical applications.

[0014] Another object of the present invention is to provide a nickel-titanium (Ni-Ti) file with a fixed taper and a variable taper, which enables controlled shaping within the root canal while preventing excessive taper increase.

[0015] To achieve the foregoing objectives and other objectives derived from the detailed description, the present invention includes a nickel-titanium (Ni-Ti) file for use in various areas of dentistry, including root canal treatment (endodontic applications) and patient treatment procedures related to root canal treatment. The file is characterized by comprising the following structure.

[0016] A bar (20) made of a grooved nickel-titanium wire spirals downward from the lower part of the head (10) and is designed to remove diseased (infected) dental nerves from the root canal of a patient.

[0017] A crown (21) forming the upper section of the rod (20) has a square or quadrilateral cross section and is capable of crown forming and debris conveying.

[0018] A middle section (22) forming the middle section of the bar (20) has an improved quadrilateral cross section designed for removing debris from the root canal and for anatomical shaping by fixed and variable taper.

[0019] A root apex (23) forming the lower section of the rod (20) has a triangular cross-section, a convex triangular cross-section, or a circular cross-section, which can advance in calcified root canals, transport debris, form apical stops, and generate a pull-back sensation without shaping the root apical region (without interfering with the root apical morphology).

[0020] The structural features and all the advantages of the present invention will be better understood through the following drawings and their associated detailed description. Therefore, these drawings and the accompanying detailed description should be taken into account during evaluation. Attached Figure Description

[0021] Figure 1a : A view of the nickel-titanium (Ni-Ti) file of the present invention.

[0022] Figure 1b Alternative configuration for nickel-titanium (Ni-Ti) files.

[0023] Figure 1c Alternative configuration for nickel-titanium (Ni-Ti) files.

[0024] Figure 1d Alternative configuration for nickel-titanium (Ni-Ti) files.

[0025] Figure 1e Alternative configuration for nickel-titanium (Ni-Ti) files.

[0026] Explanation of the reference numerals in the attached figures.

[0027] 10: Head.

[0028] 20: Rod section.

[0029] 21: Crown.

[0030] 22: Central region.

[0031] 23: Root tip.

[0032] a: Thread pitch.

[0033] α: Cone angle. Detailed Implementation

[0034] In this detailed description, preferred alternatives to the subject matter of the invention, namely the nickel-titanium (Ni-Ti) file, are described only for the purpose of better understanding the invention, without imposing any limiting effect.

[0035] Figure 1a , 1b1c, 1d and 1e illustrate the nickel-titanium (Ni-Ti) file of the present invention. Accordingly, its most basic form comprises: a head (10) mounted on a rotary electric device, and a bar (20) made of a nickel-titanium wire with a grooved structure, which extends spirally downward from the lower part of the head (10) and is designed to remove diseased dental nerves from the root canal of a patient.

[0036] The nickel-titanium (Ni-Ti) file, the subject of this invention, consists of a grooved rod (20) that extends spirally downward from the head (10). The rod (20) is divided into three sections, each with a different cross-sectional structure.

[0037] It forms the crown of the upper section (21).

[0038] The middle part of the middle section (22).

[0039] It forms the root tip of the lower segment (23).

[0040] Structural deformation of the rod section.

[0041] like Figure 1a As shown, the crown (21), middle (22) and root tip (23) of the stem (20) can have a convex triangular cross section. Figure 1a The cone angle (α) of the middle rod (20) can be 9.5° or 10.5°.

[0042] In a configuration with a taper angle (α) of 9.5°, the thread pitch (a) is as follows.

[0043] Crown (21) thread pitch (a): 1.145 mm.

[0044] Middle (22) Thread pitch (a): Between 0.685 mm and 1.350 mm.

[0045] Root tip (23) Thread pitch (a): Between 0.21 mm and 0.590 mm.

[0046] In a configuration with a taper angle (α) of 10.5°, the thread pitch (a) is as follows.

[0047] Crown (21) thread pitch (a): 1.545 mm.

[0048] Middle (22) Thread pitch (a): Between 0.705 mm and 1.440 mm.

[0049] Root tip (23) Thread pitch (a): Between 0.180 mm and 0.600 mm.

[0050] Alternative configuration for the pole.

[0051] like Figure 1b As shown, the crown (21) of the bar (20) can have a square cross-section. This square cross-section enables crown shaping and debris transport. The middle portion (22) can have a quadrilateral cross-section, which facilitates debris removal from the root canal and anatomical shaping through a fixed taper. The apical portion (23) can have a triangular cross-section, which allows it to advance and transport debris in calcified root canals and form the apical stop. Figure 1b The cone angle (α) can be 3.2°.

[0052] In a configuration with a taper angle (α) of 3.2°, the thread pitch (a) is as follows.

[0053] Crown (21) Thread pitch (a): Between 0.556 mm and 0.652 mm.

[0054] Middle (22) Thread pitch (a): Between 0.300 mm and 0.524 mm.

[0055] Root tip (23) Thread pitch (a): Between 0.140 mm and 0.268 mm.

[0056] like Figure 1c As shown, the crown (21) of the stem (20) can have a square cross-section, while the middle (22) can have a quadrilateral cross-section. The apical part (23) can have a convex triangular cross-section, which is beneficial for advancing and transporting debris in calcified root canals and forming apical stops. Figure 1c The cone angle (α) can be 3.8°.

[0057] In the configuration with a taper angle (α) of 3.8°, the thread pitch (a) is as follows.

[0058] Crown (21) thread pitch (a): between 0.694 mm and 0.808 mm.

[0059] Middle (22) Thread pitch (a): Between 0.390 mm and 0.656 mm.

[0060] Root tip (23) Thread pitch (a): Between 0.200 mm and 0.352 mm.

[0061] like Figure 1d As shown, the crown (21) and middle (22) of the stem (20) can both have quadrilateral cross sections, while the apical (23) can have a convex triangular cross section. This configuration enables the advancement and transport of debris within calcified root canals and the formation of apical stops. Figure 1d The cone angle (α) can be 4.2°.

[0062] In the configuration with a cone angle (α) of 4.2°, the thread pitch (a) is as follows.

[0063] Crown (21) Thread pitch (a): Between 0.800 mm and 0.926 mm.

[0064] Middle (22) Thread pitch (a): Between 0.464 mm and 0.758 mm.

[0065] Root tip (23) thread pitch (a): between 0.254 mm and 0.422 mm.

[0066] like Figure 1e As shown, the crown (21) and middle (22) of the stem (20) can have quadrilateral cross sections, while the root tip (23) can have a circular cross section. This configuration ensures the formation of the root tip stop point while generating a pull-back feel without shaping the root tip region. Figure 1e The cone angle (α) can be 4.4°.

[0067] In the configuration with a taper angle (α) of 4.4°, the thread pitch (a) is as follows.

[0068] Crown (21) Thread pitch (a): Between 0.725 mm and 0.989 mm.

[0069] Middle (22) Thread pitch (a): Between 0.464 mm and 0.813 mm.

[0070] Root tip (23) thread pitch (a): between 0.285 mm and 0.422 mm.

Claims

1. A nickel-titanium (Ni-Ti) file for use in the field of endodontics (applied in endodontics) including the treatment process of a patient related to endodontic treatment, characterized in that, It comprises a head (10) placed on a rotating electric device, a shaft (20) made of a nickel-titanium wire with a grooved structure, extending helically downward from the lower part of the head (10) and designed to remove the diseased dental nerve from the root canal of the patient, a crown (21) constituting the upper section of the shaft (20) and having a convex triangular cross-section, a square cross-section or a quadrangular cross-section, enabling crown shaping and debris transportation, a middle section (22) constituting the middle section of the shaft (20) and having a convex triangular cross-section or a quadrangular cross-section, designed to remove debris from the root canal and to perform anatomical shaping by fixed and variable tapering, a root tip (23) constituting the lower section of the shaft (20) and having a triangular cross-section, a convex triangular cross-section or a circular cross-section, enabling advancement in calcified root canals, debris transportation, formation of the apical stop and creation of a back-pulling sensation without shaping the apical region.

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