Handheld adapter for endodontic files

Abstract

In some embodiments, the present invention relates to methods and / or systems for endodontic cleaning using standard dental handpieces. For example, a dental adapter is disclosed that has a fitting for a standard dental handpiece, a torque limiter, and / or a mount for an endodontic file. For example, the adapter can be single-use and / or multi-use. In some embodiments, the mount includes a torque limiter. For example, the endodontic file can be connected to the mount by a friction fitting that allows the file to rotate relative to the mount at high torque. Optionally, the mount is eccentrically positioned relative to the fitting.

Description

[0001] Field and Background of the Invention

[0002] In some embodiments, the present invention relates to a system for pulp cleaning.

[0003] U.S. Patent No. 7,815,433 discloses "an improved hand-held instrument dental tool drive arrangement with a drive head that allows a tool in the drive head to be concentrically supported at any position from a fully inserted position to a maximum retracted position to adjust the length of the tool in the drive head. The tool drive arrangement preferably includes a tool and a rotatable tool support element for concentrically supporting the tool from the fully inserted position to the maximum retracted position. The tool preferably includes a maximum retraction indicator for indicating to the user when the tool has been retracted to the maximum retracted position. This provides significant advantages over the prior art because it allows the user to adjust the exposed length of the rotatable tool, preferably a dental drill, without exceeding the safe operating limit. The present invention also relates to an improved drive spindle that allows depth adjustment of the tool in a dental hand-held instrument while maintaining effective torque transmission and concentricity during high-speed rotation."

[0004] Mangat et al., "Torque and Speed in Endodontics: A Review," International Journal of Oral Care & Research, April - June 2018; 6(2):97 - 100, reveals that "handpieces and burs are among the most commonly used mechanical devices in dentistry. High-speed hand-held instruments are used for restorative procedures and pulp access, and low-speed hand-held instruments are used for restorative, oral, and periodontal procedures, as well as endodontic, orthodontic, hygiene, and laboratory procedures. Speed refers not only to revolutions per minute but also to the feet per unit surface of the tool against the workpiece to be cut. Manufacturers recommend various rotational speeds for their rotary instrumentation. Traditional endodontic motors to present-day motors use a relatively wide range of rotational speeds from 150 to 40,000 revolutions per minute."

[0005] G.M. Yared et al.; "Effect of Rotational Speed, Torque, and Operator Proficiency on the Failure of Large Taper Files", Volume 35, Issue 1, January 2002, discloses that "Greater Taper, GT, nickel-titanium rotary instruments were used in the crown-down technique. One group (rotational speed evaluation) (n = 300) used root canals (subgroups 1, 2, 3) at rotational speeds of 150, 250, and 350 revolutions per minute, respectively. Each subgroup included 100 root canals. In the second group (torque evaluation) (n = 300), the torque was set at 20 Ncm, 30 Ncm, and 55 Ncm (subgroups 4, 5, 6), respectively. In the third group (operator proficiency evaluation) (n = 300), three operators with different levels of experience (subgroups 7, 8, 9) were also compared. Each subgroup used 10 sets of GT rotary instruments and 100 extracted human molar root canals. Each set of instruments was used in up to 10 root canals and sterilized before each case. 2.5% NaOCl was used as an irrigant. The number of locked, deformed, and separated instruments in each group was recorded. Fisher's exact test was used for each type of failure, and statistical analysis was performed by pairwise comparison."

[0006] Additional background art includes European Patent Application Publication EP3323376, US Patent Application Publication 20140163555, European Patent EP2123233, US Patent Application Publication 20110171595, International Patent Application Publication W02018060343, and US Patent US6695321. Summary of the Invention

[0008] According to one aspect of some embodiments of the present invention, a system for an endodontic procedure is provided, including: a high torque dental handpiece having a standard chuck, an adapter including a fitting for the standard chuck, a torque limiter, and an attachment for an endodontic file.

[0009] According to some embodiments of the present invention, the torque limiter is positioned between the fitting and the attachment.

[0010] According to some embodiments of the present invention, the torque limiter is included in the attachment.

[0011] According to some embodiments of the present invention, the attachment includes a friction fitting.

[0012] According to some embodiments of the present invention, the fitting is a fitting proximal to the adapter, and the attachment is on its distal end.

[0013] According to some embodiments of the present invention, the handheld instrument is configured to rotate the adapter at a rate greater than 1000 revolutions per minute.

[0014] According to some embodiments of the present invention, the handheld instrument is configured to rotate the adapter with a torque greater than 0.5 N.cm.

[0015] According to one aspect of some embodiments of the present invention, there is provided an adapter for a dental handheld instrument for endodontic surgery, comprising: a fitting for a chuck of the dental handheld instrument; a torque limiter; and a mounting for an endodontic file.

[0016] According to some embodiments of the present invention, the torque limiter is positioned between the fitting and the mounting.

[0017] According to some embodiments of the present invention, the torque limiter is included in the mounting.

[0018] According to some embodiments of the present invention, the mounting includes a friction fitting.

[0019] According to some embodiments of the present invention, the adapter further includes a distal flange.

[0020] According to some embodiments of the present invention, the torque limiter is set to limit the torque on the file to less than 0.1 N.cm.

[0021] According to some embodiments of the present invention, the mounting is eccentric with respect to the fitting.

[0022] According to some embodiments of the present invention, the axis of the mounting is offset with respect to the axis of the fitting.

[0023] According to some embodiments of the present invention, the axis of the mounting is not parallel to the axis of the fitting.

[0024] According to one aspect of some embodiments of the present invention, there is provided an adapter for endodontic surgery, the adapter comprising: a fitting for a chuck of a dental handheld instrument and a mounting for an endodontic file that is eccentrically positioned with respect to the fitting.

[0025] According to some embodiments of the present invention, the axis of the mounting is offset with respect to the axis of the fitting.

[0026] According to some embodiments of the present invention, the axis of the mounting is not parallel to the axis of the fitting.

[0027] According to some embodiments of the present invention, the mounting is completely located within the flange.

[0028] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present invention, exemplary methods and / or materials are described below. In case of conflict, the patent specification, including definitions, will control. In addition, these materials, methods, and examples are illustrative only and not necessarily limiting.

[0029] Brief Description of the Drawings in Multiple Views

[0030] Some embodiments of the present invention are described by way of example only with reference to the accompanying drawings. It is to be emphasized that the details shown are by way of example and for purposes of illustrative discussion of embodiments of the present invention. In this regard, the description with reference to the drawings is to enable those skilled in the art to understand how to implement the embodiments of the present invention.

[0031] In the drawings:

[0032] Figure 1 is a flowchart showing a method for pulp cleaning according to an embodiment of the present invention;

[0033] Figure 2A is an image showing a chuck fitting according to an embodiment of the present invention;

[0034] Figure 2B is an image showing an adapter according to an embodiment of the present invention;

[0035] Figure 2C is an image showing a pulp fitting according to an embodiment of the present invention;

[0036] Figure 3 is a block diagram showing an adapter according to an embodiment of the present invention;

[0037] Figure 4 is a perspective view of a system for pulp cleaning according to an embodiment of the present invention;

[0038] Figure 5A is a perspective view of a pulp cleaning adapter according to an embodiment of the present invention;

[0039] Figure 5B is a perspective view of a pulp cleaning adapter according to an embodiment of the present invention;

[0040] Figure 6A is a perspective view of a pulp file according to an embodiment of the present invention;

[0041] Figure 6B is a distal view of an adapter according to an embodiment of the present invention;

[0042] Figure 7A is a perspective view of an endodontic file according to an embodiment of the present invention;

[0043] Figure 7B is a proximal view of an adapter according to an embodiment of the present invention;

[0044] Figure 8 is a flow chart of a method of agitating an endodontic file according to an embodiment of the present invention (using);

[0045] Figure 9 is a block diagram of a non - concentric endodontic file adapter and file assembly according to an embodiment of the present invention;

[0046] Figure 10 is a perspective view of a non - concentric endodontic file adapter and file assembly according to an embodiment of the present invention;

[0047] Figure 11 is a perspective view of an agitating endodontic file adapter and file assembly according to an embodiment of the present invention;

[0048] Figure 12A shows an adapter according to an alternative embodiment of the present invention;

[0049] Figure 12B shows an adapter in a hand - held instrument according to an alternative embodiment of the present invention;

[0050] Figure 13A shows an eccentric adapter according to an alternative embodiment of the present invention;

[0051] Figure 13B shows an eccentric adapter and an endodontic file according to an alternative embodiment of the present invention;

[0052] Figure 14A shows a perspective view of an adapter according to an alternative embodiment of the present invention;

[0053] Figure 14B shows a cross - sectional view of an adapter according to an alternative embodiment of the present invention;

[0054] Figure 15A shows a perspective view of an adapter according to an alternative embodiment of the present invention;

[0055] Figure 15B shows a cross - sectional view of an adapter according to an alternative embodiment of the present invention; and FIG. 16 shows a perspective view of an adapter according to an embodiment of the present invention.

[0056] Description of the Specific Embodiments of the Invention

[0057] The present invention, in some of its embodiments, relates to a system for endodontic cleaning.

[0058] Overview

[0059] One aspect of some embodiments of the present invention relates to a system for facilitating endodontic cleaning using a non-specific dental handpiece. In some embodiments, the system includes an adapter having standard fittings (e.g., for connection to a standard dental chuck, collet, and / or mandrel). Optionally, the adapter includes a torque limiter. For example, a friction connection may be present to allow slipping at high torque. Optionally, the adapter includes a mount for an endodontic file. For example, the mount may include a clamp and / or a friction fitting and / or an interference fitting. Optionally, the mount for the endodontic file includes a torque limiter. For example, when the torque is excessive, the mount may allow the endodontic file to rotate and / or slip relative to the adapter. In some embodiments, the system includes an endodontic file configured to clean and / or disinfect the endodontic structure at a high rotational rate (e.g., between 300 and 500 revolutions per minute and / or between 500 and 1000 revolutions per minute and / or between 1000 and 2000 rpm and / or between 2000 and 5000 revolutions per minute and / or between 5000 and 10000 revolutions per minute and / or between 10000 and 40000 revolutions per minute). For example, the file may have enhanced elasticity and / or be in the form of a brush.

[0060] One aspect of some embodiments of the present invention relates to a system for endodontic cleaning by a whipping motion. Optionally, the system includes an eccentric mount for the endodontic file. For example, the mount may be offset from the axis of rotation of the dental handpiece and / or positioned at an angle to the axis of rotation. In some embodiments, an eccentric adapter is attached to the central chuck of the dental handpiece. Optionally, the adapter includes standard fittings and / or an endodontic file mount that is non-centered relative to the fittings. Optionally, the mount for the endodontic file is configured to be torque-limited. For example, the mount may include a friction fitting.

[0061] Detailed Description of Embodiments

[0062] Before explaining in detail at least one embodiment of the present invention, it is to be understood that the invention is not necessarily limited to the details of construction and arrangement of components and / or methods shown in the following description and / or drawings and / or embodiments. The invention is capable of being implemented or practiced or realized in various other ways.

[0063] Figure 1is a flowchart showing a method for endodontic cleaning according to an embodiment of the present invention. In some embodiments, standard dental handpieces are used for endodontic cleaning. For example, the handpiece can be configured to apply high torque to the dental drill (e.g., greater than 5 N.cm and / or between 3 and 5 N.cm and / or between 1 and 3 N.cm and / or between 0.1 and 1 N.cm). In some embodiments, the handpiece can be configured to rotate the dental drill at a speed higher than that typically used for endodontic files (e.g., the handpiece can be configured to rotate between 300 and 700 revolutions per minute and / or between 700 and 1500 revolutions per minute and / or between 1500 and 4000 revolutions per minute and / or between 4000 and 40000 revolutions per minute). Optionally, the adapter is configured to limit the torque 107. Optionally, the handpiece is used to rotate the endodontic file 106. In some embodiments, the torque applied to the file can be limited 107. For example, the mount between the file and the handpiece can include a friction fitting that limits the torque 107 on the file. For example, the fitting can limit the torque 107 between 20 - 30 g-cm and / or between 1 - 20 g-cm and / or between 20 - 40 g-cm and / or between 40 - 100 g-cm and / or between 100 - 200 g-cm. In some embodiments, the adapter can be attached 102 to the handpiece and / or between the handpiece and the endodontic file. Optionally, the file is loaded 108 into the adapter.

[0064] In some embodiments, an endodontic file is mounted 108 to the adapter using a fitting that limits the torque 107 to allow the file to rotate relative to the adapter. For example, when the torque is too large, the torque limiter may not allow the file to be driven to rotate relative to the handpiece. For example, the mount can include a friction connection. Additionally or alternatively, the connection between the adapter and the handpiece can include a high-torque connection (e.g., a chuck and / or a collet can be used for the high-torque connection). Optionally or additionally, the endodontic file and / or the adapter can be connected 102 to the handpiece head through a torque-limiting attachment. Optionally or additionally, the endodontic adapter can include an inherent torque limiter (e.g., a portion of the adapter shaft can allow rotation between the handpiece of the file and the mount).

[0065] In some embodiments, the file can be changed when the adapter remains in the chuck of the handpiece. For example, the adapter can remain in the handpiece and / or the file can be inserted and / or removed from the file mount of the adapter. Optionally or alternatively, the adapter and the file can be connected and / or disconnected from the handpiece as a unit.

[0066] Figures 2A - 2CImages are respectively shown of a chuck fitting 201, an adapter 200, and an endodontic file 212 having a torque limiting fitting 204 according to an embodiment of the present invention. For example, the adapter 200 may include a torque limiting mount 208 for the endodontic file 212. Optionally, the mount 208 may include a friction fitting. For example, the friction fit elastomer of the sleeve 207 may control friction and / or torque within the range of the fit tolerance. Optionally, the sleeve 207 may include an elastomeric reinforcement, such as a longitudinal slit 209. In some embodiments, the adapter 200 includes a chuck fitting 202b. For example, the chuck fitting 202b may be similar to the chuck fitting 202a of the dental file 213. Optionally, the chuck fitting 202b is located in the proximal portion and / or proximal end of the adapter 200. The fittings 202a, 202b are optionally configured for high torque drive, for example, the fittings 202a, 202b may include a flat portion 203 and / or a D-shaped profile and / or other known fitting shapes (such as hexagonal, etc.).

[0067] In some embodiments, the mount 208 may include a retainer portion 211 that prevents the release of the fitting 204. For example, the retainer portion 211 may include a portion of the elastomerically reduced sleeve 207. For example, a ring on the distal portion of the sleeve 207 may include an elastomeric reinforcement and / or may have a larger wall thickness and / or may have a reduced inner diameter. For example, when attempting to pull the fitting 204 out of the sleeve 207, the proximal portion of the fitting 204 (which expands inside the more elastic proximal portion of the sleeve 207) resists being pulled into the portion 211 of the sleeve 207.

[0068] Figure 3 Is a block diagram showing an adapter according to an embodiment of the present invention. In some embodiments, the adapter includes a fitting 302 for a dental handpiece chuck. For example, the fitting 302 may be located at the proximal end of the adapter. Optionally, the adapter includes a mount 308 for an endodontic file. For example, the mount 308 may be located at the distal end of the adapter. Optionally, the adapter includes a torque limiter 307. In some embodiments, the torque limiter 307 may be a separate part of the adapter, such as connecting the mount 308 and the fitting 302. Optionally or additionally, the torque limiter 307 may be included in the mount 308 and / or in the connection portion between the mount 308 and the endodontic file.

[0069] In some embodiments, the adapter may include a fitting 302 for a quick connect chuck (e.g., D-collet). Optionally, the fitting 302 may have a standard size, such as 2.35 mm, 3.0 mm, 3.175 mm. Optionally or additionally, the fitting 302 may include a circular shaft for connection to a standard chuck. Optionally or additionally, the fitting may be of other types and / or sizes.

[0070] In some embodiments, the adapter can be manufactured for multiple uses. For example, the adapter can be made of materials that allow for cleaning and / or disinfection (such as metals such as stainless steel and / or nitinol and / or another elastic and / or superelastic material). Optionally or additionally, the adapter can be configured for single use. For example, it can be made of plastic.

[0071] Figure 4 is a perspective view of a system for endodontic cleaning according to an embodiment of the present invention. In some embodiments, the system includes an adapter 400. For example, the adapter 400 includes a fitting 402 that is configured to attach to a standard chuck 416 of a dental handpiece 414. Optionally, the adapter 40 includes a mount 408. For example, the mount 408 can be configured to attach to an endodontic file 412. For example, the file can include a fitting 404 that fits the mount 408. For example, the mount 408 and / or the fitting 404 can be configured to limit the torque between the handpiece and the file 412. For example, for example, a friction fitting may allow sliding at a torque greater than 0.05 N.cm and / or greater than 0.01 N.cm and / or greater than 0.1 N.cm and / or greater than 0.5 N.cm and / or greater than 1 N.cm. Optionally, the system includes a dental handpiece 414. Optionally, the handpiece can be a standard handpiece 414.

[0072] In some embodiments, the mount 408 will include a sleeve and / or cavity sized to receive the fitting 404 of the file 412. For example, the outer diameter of the adapter is approximately 2.35 mm and / or the inner diameter is approximately 2.0 mm. For example, the wall thickness of the mount is approximately 0.17 mm. For example, the wall thickness can be between 5% - 9% of the outer diameter of the sleeve.

[0073] In some embodiments, the handpiece 414 can be limited to having a high rotational speed and / or high torque. Optionally or additionally, the handpiece 414 can have an adjustable rotational speed and / or an adjustable maximum torque.

[0074] Figure 5A 、 5BPerspective views of endodontic cleaning adapters 200 and 500, respectively, according to embodiments of the present invention. In some embodiments, adapter 200 may be designed for multiple uses. For example, the adapter may be made of metal. Optionally or additionally, adapter 500 may be made for single use. For example, the adapter may be made of plastic. Optionally, adapters 200 and 500 include sleeves 507 and 207 having cavities 518. Optionally, the size and shape of cavity 518 are adapted to an endodontic file. For example, cavity 518 may be approximately cylindrical with a diameter of about 2.0 mm. Optionally, the elasticity of the wall and / or the dimensions of the cavity and the coefficient of friction are configured and / or balanced to hold the assembly of the file with a predetermined maximum torque about the axis of the cylinder. For example, the maximum torque may be less than 0.005 N.cm and / or less than 0.01 N.cm and / or less than 0.05 N.cm and / or less than 0.1 N.cm and / or less than 1 N.cm. Optionally, the adapter includes standard dental drill fittings 202b and 502. Optionally, the adapter includes torque limiting mounts 208 and 508 for the endodontic file and / or retainers 211 and 511 and / or elastic adjustment functions 209 and 509. Optionally, mounts 208 and 508 and fittings 502 and 202b are mounted by a common axis of rotation. For example, when adapters 200 and 500 are connected to and / or rotated by a hand-held instrument, the adapter rotates about the axis of mounts 208 and 508.

[0075] Figure 6A , 6B Perspective view of an endodontic file and a distal view of the adapter, respectively, according to embodiments of the present invention. In some embodiments, adapter 200 includes a bracket 208 for a fitting 604 sized and shaped to accommodate an endodontic file 612. Optionally, file 612 may include a brush 613 and / or an impeller. For example, brush 613 may be configured to fit into minute channels and / or brush 613 may be elastic for fitting into sub-channels of the root and / or agitating and / or driving fluid (e.g., and endodontic irrigation fluid such as NaOCl). Optionally, file 612 may be used for endodontic cleaning at low torque and / or high speed. For example, file 612 may include a Gentlefile available from Medicnrg Kibbutz Afikim 1514800, Israel.

[0076] Figure 7A , 7B Perspective view of an endodontic file and a proximal view of the adapter, respectively, according to embodiments of the present invention. Optionally, there is a proximal opening 718 in the adapter. Optionally, proximal opening 718 makes it easier to insert fitting 204 into sleeve 207 by providing an outlet for trapped air.

[0077] Figure 8It is a flowchart of a method for agitating an endodontic file according to an embodiment of the present invention. In some embodiments, the endodontic file is eccentrically mounted on a handheld instrument 808. Optionally, the file can be non - centrally loaded onto an adapter. For example, the center of the mount can be displaced from the axis of rotation of the adapter. Optionally or additionally, the longitudinal axis of the file may not be parallel to the axis of rotation of the adapter. Optionally or additionally, the file can be eccentrically mounted on the handheld instrument. Optionally, when the handheld instrument rotates 832 the adapter and / or the file, the distal portion of the file can agitate 834. For example, in some cases, when the file is in the root canal, the agitation 834 effect may cause the instrument to clean and / or clean the root canal wall more evenly. For example, in some cases, the agitation 834 effect can improve the mixing and activation of chemicals in the root canal. Optionally, the torque of the file is limited.

[0078] Figure 9 It is a block diagram of an eccentric endodontic file adapter according to an embodiment of the present invention. In some embodiments, the adapter is configured such that the file rotates and / or agitates. Optionally, the adapter can include a fitting 808 for a dental handheld instrument (e.g., Figure 2B of the fitting 202b). Optionally, the fitting 802 and / or the mount 808 are eccentrically positioned. For example, when the file is attached to the file 808, it can be held such that its longitudinal axis (e.g., the longitudinal axis of the connecting fitting, e.g., Figure 2B and 2C the fitting 204 shown in) is offset from the axial rotation of the fitting 802. Optionally or additionally, the longitudinal axis of the file can be oriented not to be parallel to the axis of rotation of the handheld instrument fitting 802. Optionally or alternatively, the long axis of the file can be positioned non - parallel to the axis of rotation of the handheld instrument fitting 802. The adapter can optionally be configured for multiple uses (e.g., it can be made of a sterilizable material such as metal). Optionally or additionally, the adapter can be single - use (e.g., it can be made of inexpensive molded plastic). Optionally, the adapter includes a torque limiter.

[0079] Figure 10Perspective view of the endodontic file adapter 1000 and file assembly according to an embodiment of the present invention. In some embodiments, the adapter 1000 includes a fitting 1002 for a dental handpiece. For example, the fitting 1002 may include a standard fitting 1002, such as a self-centering chuck for quick clamping. Optionally, the fitting 1002 includes a D-shaped cross-section and / or a flange for quick and / or reliable connection. For example, the fitting 1002 can be fitted into a 2.35 mm chuck. For example, the fitting 1002 can be configured to rotate about axis 1042. Optionally, the adapter includes an eccentric mount 1008 for the endodontic file 1012. For example, the mount 1008 may include a sleeve 1007. For example, the outer dimensions and / or shape of the sleeve 1007 may be adapted to the dental handpiece fitting 1002. For example, the outer surface of the sleeve 1007 can be a cylinder concentric and / or parallel to the axis 1042 of the fitting 1002 (e.g., the outer surfaces of the fitting 1002 and the mount 1008 can be concentric). For example, the outer diameter of the sleeve 1007 can be adapted to the fitting 1002 (e.g., 2.35 mm for a 2.35 mm chuck fitting). Optionally, the mount 1008 is configured to hold the file 1012 eccentrically with respect to the fitting 1002. For example, the mount 1008 can have a cavity 1018 for the fitting 1004 configured to hold the file 1012. Optionally, the cavity 1018 is offset relative to the rotational axis 1042 of the fitting 1002. For example, the longitudinal axis 1041 of the cavity 1018 can be offset relative to the axis 1042 by 0.001 - 0.01 mm and / or 0.01 - 0.1 mm and / or 0.1 - 0.5 mm and / or 0.5 - 1 mm and / or 1 - 2 mm. Optionally or additionally, the cavity 1018 can be oriented at a non-parallel angle relative to the axis 1042. For example, the longitudinal axis 1041 of the cavity 1018 can be at an angle to the axis 1042: between 0.1 - 2.0 degrees and / or 2 - 5 degrees and / or 5 - 10 degrees and / or 10 - 20 degrees. In some embodiments, the cavity 1018 can be offset away from the center of the sleeve 1007 to intersect the outer edge of the sleeve 1007 (e.g., the sleeve 1007 can have an open profile and / or a crescent profile 1044). Optionally, when the adapter is rotated (e.g., using a dental handpiece connected to the fitting 1002), it rotates the dental file in a path eccentric with respect to the axis 1041 of the file 1012. For example, the file 1012 rotates about the 1042 axis.

[0080] In some embodiments, the adapter 1000 is single-use and / or disposable. For example, the adapter 1000 can be made of plastic. Optionally or additionally, the adapter 1000 can be configured for multiple uses. For example, the adapter can be made of a sterilizable material (e.g., metal).

[0081] In some embodiments, the adapter 1000 has an opening at its outer edge. For example, when the file 1012 rotates eccentrically, the eccentric position of the cavity 1018 and the elasticity of the file 1012 can produce a whipping action. Optionally, the fitting 1004 is made of rubber. In some embodiments, in addition to the eccentric motion generated at high RPMs as a function of the elasticity of the file 1012 or the brush, the eccentric mount 1008 will cause an additional circular motion 1020 in space.

[0082] The fitting 1002 of the adapter 1000 is optionally constructed to standard file dimensions and allows locking of any existing hand-held instrument mechanism. The adapter 1000 optionally includes a torque limiter. For example, the connection between the fitting 1004 of the file 1012 and the cavity 1018 of the mount 1008 can be a friction connection that allows sliding at high torque, thereby limiting the torque on the file 1012.

[0083] Figure 11 is a perspective view of a pulp file adapter and file adapted according to an embodiment of the present invention. In some embodiments, the fitting 1104 of the pulp file 1112 is attached to a dental hand-held instrument 1114 via an eccentric adapter 1100. Optionally, the eccentricity of the adapter 1100 and / or the flexibility of the file 1112 enable a whipping motion 1120 of the distal end of the file 1112. In some embodiments, the whipping motion 1120 causes the file 1112 to better contact the dimensional walls of the channel 1181 in the tooth 1180.

[0084] Figure 12A and 12B shows an adapter according to an alternative embodiment of the present invention. In some embodiments, the adapter includes a mount 1208 for a pulp file 1212. Optionally, the mount 1208 limits the torque on the file 1212. For example, the mount 1208 can hold the fitting 1204 of the file 1212 by a friction connection (e.g., within a cavity), such as, as Figure 12B shown), so that when the torque between the mount 1208 and the file rises above a critical value (e.g., as described in the various embodiments above), it will slide.

[0085] In some embodiments, the proximal portion of the adapter 1200 (e.g., the fitting 1202, the groove 1201, and / or the mount 1208) fits into and / or attaches to the standard chuck of a dental hand-held instrument 1214 (e.g., as Figure 12Bas shown). For example, adapter 1200 may include a fitting 1202 connected to the chuck. For example, fitting 1202 may include a flat surface 1203 that facilitates the transfer of high torque from the hand-held instrument 1214 to adapter 1200. For example, fitting 1202 may include a groove 1201 for quick connection (e.g., via an interference connector) and / or locking the adapter to the chuck.

[0086] In some embodiments, adapter 1200 will include a flange 1211. Optionally, flange 1211 is located at the distal end of fitting 1202 of hand-held instrument l214. Optionally, adapter 1200 is shaped and sized such that when fitting 1202 is inserted into hand-held instrument 1214, flange 1211 remains outside hand-held instrument 1214 (e.g., as Figure 12B shown). For example, flange 1211 may protect hand-held instrument 1214 (e.g., the chuck) from the sprayed fluid. Optionally or additionally, flange 1211 may make it easier to operate adapter 1200 and / or make it easier to attach the endodontic file 1212. For example, the opening in flange 1211 leading to cavity 1218 is inwardly inclined, for example, to make it easier for fitting 1204 of file 1212 to slide into cavity 1218. In some embodiments, flange 1211 remains outside the drill mount (e.g., the chuck and the chuck) of hand-held instrument 1214, and / or laterally projects beyond the portion of fitting 1204 that fits into the drill mount of hand-held instrument 1214. The excess material of the flange facilitates cutting off the bevel 1217. For example, it is very difficult to cut a bevel on the thin wall of fitting 1204 near flange 1211 (the bevel may be thin to fit into the drill mount of hand-held instrument 1214). For example, flange 1211 may laterally project 1213 between 1-3 mm and / or between 0.2-1 mm and / or between 3-6 mm from the outer edge of mount 1208. In some embodiments, the thickness 1215 of flange 1211 may be between 1-2 mm and / or between 0.1-1 mm and / or between 2-5 mm (in the proximal-distal direction).

[0087] Figure 13A and 13BAn eccentric adapter according to an alternative embodiment of the present invention is shown. In some embodiments, the fitting 1204 of the endodontic file 1212 may be eccentrically attached to the mount 1308 of the adapter 1300. For example, the wall on one side of the cavity 1318 into which the mount 1308 of the adapter 1204 is inserted may be thinner than the wall on the other side of the cavity 1318, and / or at some point, the wall of the cavity 1318 may be completely missing (the edge of the cavity 1318 may reach the outer edge of the mount 1308). For example, the cavity 1318 may be an open channel. Optionally, the flange 1311 may partially surround the distal opening of the cavity 1318. Optionally or additionally, the flange 1311 may completely surround the distal opening of the cavity 1318 even when the cavity 1318 is eccentric and / or when the cavity 1318 is an open channel (e.g., the flange 1311 may have an annular form similar to the flange 1211). Optionally, the distal side of the flange 1311 (e.g., leading to the cavity 1318) may be inclined.

[0088] Figure 14A A perspective view of an adapter according to an alternative embodiment of the present invention is shown. Figure 14B A cross-sectional view of an adapter according to an alternative embodiment of the present invention is shown. In some embodiments, the adapter 1400 will include a flange 1411. Optionally, the flange 1411 is positioned at the distal end of the fitting 1402 of a hand-held instrument (e.g., hand-held instrument 1214). In some embodiments, the mount 1408 for the endodontic file 1212 is entirely and / or mostly located within the flange 1411. Optionally, the fitting 1402 may be solid and / or have a hollow structure with a cavity 1418 smaller than the mount 1408 (e.g., the width of the cavity in the mount 1408 may be less than 90% of the diameter of the cavity 1418 and / or less than 50% of the diameter of the cavity 1418 and / or less than 20% of the diameter of the cavity 1418) and / or the length of the hollow structure in the mount 1408 may be less than 90% of the length of the cavity 1418 and / or less than 50% of the length of the cavity 1418 and / or less than 20% of the length of the cavity 1418). Optionally, the shape and dimensions of the adapter 1400 are such that when the fitting 1402 is inserted into the hand-held instrument 1214, the flange 1411 remains outside the hand-held instrument 1214 (e.g., as Figure 14Bshown) and / or mostly outside the handheld instrument (e.g., at least 90% and / or at least 50% of the cavity 1418 is outside the fitting 1402). In some embodiments, positioning the mount 1408 outside the fitting 1402 makes the adapter 1400 easier to form (e.g., because there is no need to have such thin walls in the mount 1408). In some embodiments, placing the mount 1408 in the flange 1411 allows a higher level of eccentricity than when the mount (e.g., mount 1308) has to be assembled into the drill mount of the handheld instrument. For example, a portion of the cavity 1418 can be positioned laterally outward relative to the outer edge of the handheld instrument fitting 1402.

[0089] In some embodiments, the flange 1411 can shield the handheld instrument 1214 (e.g., its chuck) from the ejected fluid. Optionally or additionally, the flange 1411 can make it easier to operate the adapter 1400 and / or make it easier to attach the endodontic file 1212. For example, the opening in the flange 1411 leading to the cavity 1418 can be inclined inwardly, e.g., to make it easier for the fitting 1204 of the file 1212 to slide into the cavity 1418. In some embodiments, the flange 1411 remains outside the drill mount (e.g., the chuck and its jaws) of the handheld instrument 1214, and / or laterally protrudes beyond the portion of the fitting 1204 that fits into the drill mount of the handheld instrument 1214. For example, the flange 1411 can laterally protrude 1413 between 1 - 3 mm and / or between 0.2 - 1 mm and / or between 3 - 6 mm from the outer lateral edge of the fitting 1402. In some embodiments, the thickness 1415 of the flange 1411 can be between 10 - 15 mm and / or 15 - 20 mm and / or 20 - 50 mm and / or 5 - 10 mm (in the proximal - distal direction).

[0090] In some embodiments, the mount 1408 limits the torque on the file 1212. For example, the mount 1408 can hold the fitting 1204 of the file 1212 by a friction connection (e.g., within the cavity 1418), such that this friction connection allows slippage if the torque between the mount 1408 and the file rises above a critical value (e.g., as described in the various embodiments above).

[0091] In some embodiments, the proximal portion of the adapter 1400 (e.g., the fitting 1402, the recess 1401) mates with and / or attaches to the standard chuck of the dental handpiece 1214. For example, the adapter 1400 may include a fitting 1402 that connects to the chuck. For example, the fitting 1402 may include a flat surface 1403 that facilitates the transfer of high torque from the handpiece 1214 to the adapter 1400. For example, the fitting 1402 may include a recess 1401 for quick connection (e.g., via an interference connector) and / or locking the adapter to the chuck.

[0092] Figure 15A A perspective view of an adapter according to an alternative embodiment of the present invention is shown. Figure 15B A cross-sectional view of an adapter according to an alternative embodiment of the present invention is shown. In some embodiments, the adapter 1500 will include a flange 1511. Optionally, the flange 1511 is positioned at the distal end of the fitting 1502 of the handpiece (e.g., the handpiece 1214). Optionally or additionally, the fitting 1502 may include a simple friction fit that fits well enough with the handpiece 1214 to function (e.g., as described below with respect to FIG. 16). In some embodiments, the mount 1508 for the endodontic file 1212 is located entirely and / or mostly within the flange 1511. Optionally, the fitting 1502 may be solid and / or have a hollow structure with a cavity 1518 that is smaller than the mount 1508 (e.g., the width of the hollow structure in the mount 1508 may be less than 90% and / or 50% and / or 20% of the diameter of the cavity 1518) and / or the length of the hollow structure in the mount 1508 may be less than 90% and / or 50% and / or 20% of the length of the cavity). Optionally, the shape and dimensions of the adapter 1500 are such that when the fitting 1502 is inserted into the handpiece 1214, the flange 1511 remains outside the handpiece 1214 (e.g., as Figure 15B shown) and / or mostly outside the handpiece (e.g., at least 90% and / or at least 50% of the cavity 1518 is outside the mount 1502). In some embodiments, positioning the mount 1508 outside the fitting 1502 makes the adapter 1500 easier to form (e.g., because there is no need to have such thin walls in the mount 1508). In some embodiments, the mount 1508 and / or the cavity 1518 may be positioned concentrically with the fitting 1502.

[0093] In some embodiments, the flange 1511 may protect the handpiece 1214 (e.g., its chuck) from the ejected fluid. Optionally or additionally, the flange 1511 may make it easier to handle the adapter 1500 and / or make it easier to attach to the endodontic file 1212. For example, the opening in the flange 1511 leading to the cavity 1518 may be inclined inwardly, such as to make it easier for the fitting 1204 of the file 1212 to slide into the cavity 1518. In some embodiments, the flange 1511 remains outside the drill mount (e.g., the chuck and its collet) of the handpiece 1214, and / or laterally projects beyond the portion of the fitting 1502 that fits into the drill mount of the handpiece 1214. For example, the flange 1511 may project laterally 1513 between 1 - 3 mm and / or between 0.2 - 1 mm and / or between 3 - 6 mm from the outer edge of the fitting 1502. In some embodiments, the thickness 1515 of the flange 1511 may be between 10 - 15 mm and / or 15 - 20 mm and / or 20 - 50 mm and / or 5 - 10 mm (in the proximal - distal direction).

[0094] In some embodiments, the mount 1508 limits the torque on the file 1212. For example, the mount 1508 may hold the fitting 1204 of the file 1212 by a frictional connection (e.g., within the cavity 1518), whereby if the torque between the mount 1508 and the file rises above a critical value (e.g., as described in the various embodiments above), slippage is allowed.

[0095] In some embodiments, the proximal portion of the adapter 1500 (e.g., the fitting 1502, the groove 1501) fits into and / or attaches to the standard chuck of the dental handpiece 1214. For example, the adapter 1500 may include a fitting 1502 connected to the collet. For example, the fitting 502 may include a flat surface 1503 that facilitates the transfer of high torque from the handpiece 1214 to the adapter 1500. For example, the fitting 1502 may include a groove 1501 for quick connection (e.g., by an interference connector) and / or for locking the adapter to the collet.

[0096] Shown in FIG. 16 is a perspective view of an adapter according to an embodiment of the present invention in some embodiments. The adapter may include a simple friction fitting 1602. The friction fitting 1602 is optionally configured to fit a standard endodontic file. For example, part 1602' of the fitting 1602 may be the same as the fitting 204 of the endodontic tissue. For example, the adapter 1600 may be used to eccentrically connect an endodontic file to a concentrically rotating hand-held instrument of the endodontic file. For example, the outer diameter of part 1602' may be about 2.0 mm and / or between 1.9 and 2.1 mm. For example, the outer diameter of the thin section of the fitting 1602 may be about 1.5 mm and / or between 1 and 2 mm and / or between 0.5 and 1 mm.

[0097] In some embodiments, the adapter 1600 will include a mount 1608 for the endodontic file. Optionally, the mount may include an elastic reinforcement, such as a slit 1609. In some embodiments, the cavity 1618 may hold the fitting 204 of the endodontic file tightly enough to prevent the release of the file, i.e., the file will not be released even when the user rotates the system at a speed higher than the recommended limit. Optionally, the mount 1608 will have enough elasticity to allow the file to slip when the torque exceeds a threshold (e.g., as described above for other embodiments). For example, the cavity 1618 may be tight (e.g., the diameter is slightly smaller than the fitting portion of the file). For example, the diameter of the cavity may be 5-10% smaller and / or 1-5% smaller and / or between 10-30% smaller than the fitting of the file. For example, if the diameter of the fitting of the file is 2 mm, the diameter of the cavity 1618 may be between 1.8 and 1.9 mm and / or between 1.9 and 1.99 mm and / or between 1.5 and 1.8 mm.

[0098] In some embodiments, an accessory adapter 1603 is provided. For example, the adapter 1603 includes an elastic sleeve (e.g., made of silicone, rubber, and / or plastic elastomer). The sleeve is optionally mounted around a smaller fitting 1602 and / or increases its diameter to fit a larger chuck. For example, the adapter can be mounted on the adapter 1602 and increase its diameter to fit tightly into a 2.35 (d-type standard) millimeter chuck of an endodontic file chuck (e.g., the outer diameter of the fitting 1602 that mates with the adapter fitting 1603 can be between 1.9 mm and 2.1 mm) and / or increase its diameter to fit into a standard chuck of a drill handpiece (e.g., the 2.35 mm chuck of the handpiece 1214) (e.g., the outer diameter of the fitting 1602 that mates with the adapter fitting 1603 can be 2.3 - 2.5 mm). For example, optionally, the sleeve fits tightly and / or is held on the chuck of the handpiece 1214 by friction. Optionally or additionally, the fitting 1602 of the adapter 1600 can be large enough to fit by friction into a standard chuck of a drill handpiece (e.g., the outer diameter of the fitting 1602 can be between 2.3 - 2.5 mm). For example, the friction fit can be sufficient to connect to the handpiece 1214, and / or such as Figure 15A the dedicated fitting 1502 shown for mating is cheaper.

[0099] It is expected that during the term of this application, many related technologies can be developed and matured in accordance with the present invention, such as dental handpieces, accessories, and endodontic tools, and the scope of the terms in this specification, such as handpieces, mounts, accessories, and files, is intended to a priori include all such new technologies.

[0100] As used herein, the term "about" means ±10%.

[0101] The terms "comprises," "comprising," "includes," "including," "has," and similar terms mean "including but not limited to."

[0102] The term "consisting of" means "including and limited to."

[0103] The term "consisting essentially of" means that a composition, method, or structure can include additional ingredients, steps, and / or parts, but can only include such additional ingredients, steps, and / or parts if they do not materially alter the basic and novel features of the claimed composition, method, or structure.

[0104] As used herein, the singular forms "a," "an," and "the or said" include plural referents unless the context clearly dictates otherwise. For example, the term "compound" or "at least one compound" can include multiple compounds, including mixtures thereof.

[0105] Throughout the application, various embodiments of the present invention may be presented in a range format. It should be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the present invention. Accordingly, the description of a range should be considered to specifically disclose all possible sub-ranges as well as the individual numerical values within that range. For example, the description of a range such as 1 to 6 should be considered to have specifically disclosed sub-ranges such as 1 to 3, 1 to 4, 1 to 5, 2 to 4, 2 to 6, 3 to 6, etc., as well as the individual numbers within that range, such as 1, 2, 3, 4, 5, and 6. This applies regardless of the breadth of the range.

[0106] The numerical ranges referred to herein are meant to include any recited number (fractional or integral) within the recited range. The phrases "from... to" / "ranging from... to" between a first recited number and a second recited number and "from the first recited number" to "the second recited number" are used interchangeably herein and mean to include the first and second recited numbers and all the fractional and integral numbers therebetween.

[0107] As used herein, the term "method" refers to a way, means, technique, and procedure for accomplishing a particular task, including but not limited to those ways, means, techniques, and procedures known to, or developed from those known to, practitioners in the fields of chemistry, pharmacology, biology, biochemistry, and medicine.

[0108] As used herein, the term "treatment" includes eliminating, substantially inhibiting, slowing down or reversing the progression of a disorder, substantially ameliorating the clinical or aesthetic symptoms of a disorder or substantially preventing the appearance of the clinical or aesthetic symptoms of a disorder.

[0109] It should be understood that, for clarity, certain features of the present invention that are described in the context of separate embodiments may also be provided in combination in a single embodiment. Conversely, for brevity, the various features of the present invention that are described in the context of a single embodiment may also be provided separately or in any suitable sub-combination, or as any other described embodiment suitable for the present invention. Certain features described in the context of various embodiments should not be considered essential features of those embodiments unless the embodiment is inoperable without those elements.

[0110] Although the present invention has been described in connection with its specific embodiments, it will be apparent to those skilled in the art that many alternatives, modifications, and variations will be obvious. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and broad scope of the appended claims.

[0111] All publications, patents, and patent applications mentioned in this specification are hereby incorporated by reference in their entirety into this specification to the same extent as each individual publication, patent, or patent application is specifically and individually indicated to be incorporated by reference into this specification. Additionally, any reference cited or to this application should not be construed as an admission that such reference is prior art to the present invention. In a sense, this application uses subheadings, which should not be construed as necessarily limiting.

Claims

1. An endodontic surgical system, comprising: a high-torque dental handpiece having a standard chuck; an adapter, comprising: a chuck fitting for the standard chuck; a torque limiter; and a mount for an endodontic file; wherein: the mount includes a cylindrical cavity having a distal opening; wherein the cylindrical cavity is configured to hold a cylindrical fitting for the endodontic file therein via the torque limiter; wherein the torque limiter includes a friction connection that allows the endodontic file to slide within the mount when the torque between the mount and the endodontic file rises above a critical value; wherein the distal opening is configured to insert the cylindrical fitting of the endodontic file through the distal opening into the cylindrical cavity; and wherein the chuck fitting is located on the proximal end of the adapter, wherein the chuck fitting is configured to be fixed inside a chuck of the high-torque dental handpiece, and the mount is on its distal end.

2. The system according to claim 1, wherein the high-torque dental handpiece is configured to rotate the adapter at a rate greater than 1000 revolutions per minute.

3. The system according to claim 1, wherein the high-torque dental handpiece is configured to rotate the adapter at a torque greater than 0.5 N.cm.

4. An adapter for a dental handpiece for endodontic surgery, comprising: a chuck fitting for a chuck of the dental handpiece; a torque limiter; and a mount for an endodontic file; wherein: the mount includes a cylindrical cavity having a distal opening; wherein the cylindrical cavity is configured to hold a cylindrical fitting for the endodontic file therein via the torque limiter; wherein the torque limiter includes a friction connection that allows the endodontic file to slide within the mount when the torque between the mount and the endodontic file rises above a critical value; wherein the distal opening is configured to insert the cylindrical fitting of the endodontic file through the distal opening into the cylindrical cavity; and wherein the chuck fitting is located on the proximal end of the adapter, wherein the chuck fitting is configured to be fixed inside the chuck of the dental handpiece, and the mount is on its distal end.

5. The adapter according to claim 4, further comprising a distal flange.

6. The adapter according to claim 5, wherein the mount is entirely within the distal flange.

7. The adapter according to claim 5, wherein the distal flange projects laterally beyond a portion of the cylindrical fitting of the endodontic file that fits into the mount of the dental handpiece.

8. The adapter according to claim 4, wherein the critical value is less than 0.1 N.cm.

9. The adapter according to claim 4, wherein the longitudinal axis of the endodontic file is non-parallel to the rotational axis of the chuck fitting of the dental handpiece.

10. The adapter according to claim 4, wherein the axis of the mounting member is offset relative to the axis of the chuck fitting.

11. The adapter according to claim 4, wherein the axis of the mounting member is not parallel to the axis of the chuck fitting.

12. The adapter according to claim 4, wherein the chuck fitting is a sleeve, and the sleeve includes at least a portion of the cylindrical cavity.

13. The adapter according to claim 4, wherein the distal opening is inclined inwardly to facilitate the sliding of the cylindrical fitting of the endodontic file into the cylindrical cavity.

14. An adapter for endodontic surgery, comprising: a fitting for a dental handpiece chuck; and a mounting member for an endodontic file; wherein: the mounting member includes a cylindrical cavity having a distal opening; wherein the axis of the cylindrical cavity is eccentrically placed relative to the rotational axis of the fitting.

15. The adapter according to claim 14, wherein the axis of the cylindrical cavity is offset relative to the rotational axis of the fitting.

16. The adapter according to claim 14, wherein the axis of the cylindrical cavity is not parallel to the rotational axis of the fitting.

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