JP6417072B1 - Handle ring with torque adjustment mechanism - Google Patents

Abstract

In a dental implant treatment, the present invention is a drive device used for fastening a component of a dental implant, etc., which is small and can be used in a narrow oral cavity and has a ratchet mechanism. An object of the present invention is to provide a drive device having a function of selectively obtaining a desired torque without any problems. In order to selectively obtain a plurality of stages of torque, a button, a latch having a protruding portion, a driver insertion portion, a spring and a cover are provided, and the inner diameter is 5 mm or more and the outer diameter is 20 mm or less. And handle ring. [Selection] Figure 8

Description

The present invention relates to a drive device used to screw together components of a dental implant system.

The dental implant treatment is one of the dental treatments performed on a tooth defect site lost due to caries, periodontal disease, or trauma.

Usually, a dental implant is made of pure titanium or titanium alloy having excellent biocompatibility, and is embedded in a tooth defect site as an alternative to a tooth root as described in FIGS. 1 and 2 to function as an artificial tooth root. The abutment (B) serving as an abutment is mounted on the dental implant (A), and various prosthetic devices are fixed thereto to restore the oral function.

As shown in FIG. 1, a dental implant generally has a screw shape and is generally fixed to a jawbone using an implant driver (C) mounted on a driving device.

The abutment (B) is attached to the dental implant (A) by screwing through the abutment screw (D), and the abutment screw (D) is fixed by a driver attached to the driving device. It is common (see FIG. 1).

The maximum allowable torque is set for fixing the dental implant (A) to the jawbone, and the recommended torque is generally set for fixing the abutment screw (D). As a driving instrument that can measure the torque to be fixed, the electric bone surgical instrument (E) is a contra-angle (F) (with a contra-angle driver (G)) (see FIGS. 3 and 4) or manual dental implant surgery. A torque wrench (H) which is a tool (with driver (10)) is used (see FIGS. 5 and 6).

However, these drive devices are separated from the center line (14) of the drive unit (13), which is the point of action of the driver, and the force point for applying torque (in the case of a contra-angle, the handle unit (F1) held by a finger) is separated. .

In this case, in the low torque stage at the beginning of fixation, apart from the one hand which is a power point, the remaining one hand does not support the vicinity of the center line (14) so that the driving direction is not shifted. In the case of fixation to the jawbone, there is a high risk of embedding in a position different from the intended fixation direction or in the case of fixation of the abutment screw (D), and the screw mountain (A1) is crushed. Is required.

Therefore, it is general that the low torque stage at the beginning of the fixation starts driving the driver (G, 10) directly with fingers to reduce the risk.

Further, in order to reduce the number of components of the dental implant system, the driver driven by fingers and the driver for the torque wrench are generally the same, and the outer diameter of the handle (11) of the driver (10) is large. In this case, torque is easily applied when driven with fingers, but when a torque wrench is used in combination, the torque wrench becomes large, making it difficult to use in a narrow oral cavity.

Patent Document 1 describes a method of manufacturing a ratchet having a latch function by making the entire pivot housing to which an implant driver is mounted into a spiral shape.

However, the ratchet does not have a mechanism for significantly stopping idling when idling with a predetermined torque, and it is necessary to change the instrument when it is desired to apply additional torque, which is inferior in its simplicity.

Patent Document 2 discloses that the predetermined torque value can be changed by adjusting the spring force of the pressing spring.

However, specifically, it is a means to adjust the set torque by rotating the adjustment screw and increasing / decreasing the preload of the spring. To change this torque value setting, the treatment is temporarily suspended and the instrument adjusted. The desired torque set value cannot be easily changed during operation.

Patent Document 3 discloses a ratchet type torque wrench that has a rotation mechanism and can selectively select a desired torque value.

However, the main object of the present invention is to be able to significantly change the torque setting value during a fastening operation in a narrow oral cavity, and in order to achieve the object, the instrument and the adjusting mechanism are small and the adjustment is It must be achieved with the finger of one hand performing the fastening operation. When considering a disc-shaped handle ring including the unit wrench having the latch function, the main object of the present invention is achieved because the tool and the adjusting mechanism are enlarged and it is difficult to adjust the torque mechanism with one hand. No.

Japanese Patent No. 5951805 JP 2003-033373 A Japanese Patent No. 0487682

In dental implant treatment, a drive device used for fastening a dental implant component or the like may use a device having a mechanism that prevents fastening with excessive torque by causing the latch to idle at a predetermined torque. . At that time, if the fastening of the component or the like could not be completed with a predetermined torque, it was necessary to carry out further fastening by switching to a device or the like capable of applying a higher torque.

Moreover, since it is used in a narrow oral cavity, the device is desired to be as small as possible.

The present invention is a drive device used for fastening dental implant components and the like in dental implant treatment, which is small and can be used in a narrow oral cavity, and has a ratchet mechanism without changing the device. It is an object of the present invention to provide a drive device having a function of selectively obtaining the torque.

As a result of intensive studies and researches, the present inventors have found the following findings in order to solve the above problems.
1. A ring-shaped driving device (handle ring) used for fastening a dental implant component or the like, wherein a hollow portion is provided in a part of the handle ring so that a plurality of stages of torque can be selectively obtained. The cover and the driver insertion portion are further provided so that the button and the spring are engaged with each other, and the spring and the latch having the protruding portion directed in the axial direction of the handle ring are engaged with each other. A handle ring having an inner diameter of 5 mm or more and an outer diameter of 20 mm or less.
2. 1. A slide-type torque adjusting mechanism provided with a slide mechanism in the cut-out portion . Handle ring as described in.
3. The above-mentioned 1., wherein the driver insertion portion is hollow. Or 2. Handle ring as described in.
4). 1. The shape is a disk shape. Or 3. Handle ring as described in.
5. The height of the protrusion of the latch is 0.2 to 3.0 mm. Or 4. Handle ring as described in.
6). The projecting portion has a tapered shape as described in 1 above. Or 5. Handle ring as described in.
7). 5. The protrusion described above, wherein the protrusion has a tapered asymmetric shape. Handle ring as described in.
8). 1. The thickness is 3 mm or more and 10 mm or less. Or 7. Handle ring as described in.

The present invention has been made paying attention to the above problems, and is a small instrument that can be used in a narrow oral cavity and that has a ratchet function that prevents fastening with an excessive torque. The instrument is characterized in that a desired torque can be easily and selectively obtained without changing the instrument.

Hereinafter, preferred embodiments will be described. However, the following embodiments are merely examples, and the present invention is not limited to the following embodiments. In addition, other optional components can be provided.

The handle ring (1) of the present invention includes a driver insertion part (4) for inserting a driver, a latch (3) provided integrally with the handle ring having a protruding part directed in the axial direction of the ring, a button (2), An internal structure comprising a spring (here, using a coil spring) (5), and the handle ring (1) is hollowed out so that the button (2), the spring (5) and the latch are engaged and operated. The cover (7) is provided in the hollowed out part. (See FIGS. 8 to 8C)
When attaching a dental implant, a known driver (10) that can be used in combination with the handle ring (1) of the present invention can be widely used. As shown in FIG. 5, the handle (11), the cam (12), and the drive unit are used. (13).

The handle ring (1) of the present invention employs a part with an inner diameter (driver insertion part (4)) that is occupied by one side (FIG. 8) and a part that is hollow as shown in FIG. 8B. can do.

The shape of the handle ring of the present invention can adopt various shapes (for example, a disc shape, a cube shape, a cube shape with smooth corners, etc.) depending on the driver that can be used in combination. Is preferred.

The latch (3) is stressed toward the driver insertion portion (4) by a coil spring (5) so as to be engaged with the cam (12). (See FIG. 8C). The latch (3) of the present invention can be widely or integrally formed with the handle ring, or a desired shape. However, from the viewpoint of productivity, the latch is formed as a separate handle from the inside of the handle ring. Install so that it protrudes to the inner diameter of the ring. Further, the protruding portion of the latch (3) can widely adopt a shape that can be in line contact or plane contact with the known general cam (12), but has a tapered shape (symmetric or asymmetric) that can be in line contact. It is preferable to do.

By adopting these structures, when the handle ring (1) is driven (rotated) in one direction with a finger, the latch (3) and the cam (12) are fitted to the driver (10). Torque is applied and a reaction force from the latch (3) is applied to compress the coil spring (5).

When the first torque of a certain torque or more (for example, 10 N · cm or 20 N · cm) is reached by driving (rotating) in the one direction, the coil spring (5) is compressed to the first length accordingly. When the latch (3) is disengaged from the cam (12), the driver (10) can idle.

In order to obtain a higher torque, the button (2) is pushed toward the center of the handle ring (1). Since the coil spring (5) is compressed in accordance with the amount of pushing, the torque required for the latch (3) to come off from the cam (12) will increase. With the first torque, the driver (10) Does not idle.

At this time, the coil spring (5) is compressed by the button (2) by mechanically limiting the maximum pushing amount of the button (2) using a part of the internal structure of the handle ring (1). The maximum stress can be limited. In that case, when a predetermined second torque is reached, the reaction force by the cam (12) and the latch (3) accompanying the drive (rotation) of the driver (10) against the stress by the button (2). As a result, the coil spring (5) is compressed to the second length, the latch (3) is released from the cam (12), and the driver (10) can idle. With this configuration, it is possible to prevent excessive torque from being applied to the driver (10) even when used with the button (2) being pressed, and it is possible to perform treatment more safely. It becomes.

When the driver insertion portion (4) is hollow, the driver (10) can be mounted from either the top or the bottom of the handle ring (1). A combination of engagement of the latch (3) and the cam (12) or idling of the driver (10) can be selected.

Further, in addition to the above limitation of the button (2), the inclination angle (100) and the inclination angle (101) of the protrusion of the latch (3) are asymmetrical so that the driver (10) can be connected to the driver insertion portion (4). The first torque of constant idling obtained by the inclination angle (100), the amount of pressing of the button (2) by inserting from the opposite side or using the rotation direction of the driver (10) in the reverse direction In addition to the second torque according to the above, the third torque that makes a constant idling by using the inclination angle (101), and the fourth torque that depends on the pushing amount of the button (2) can be selected and used.

An example of a specific design in the case of FIGS. 8B and 8C is shown below. Here, FIG. 8C shows the internal structure when the cover is removed from FIG. 8B to facilitate understanding.
A coil spring having an inclination angle (100) of 13 degrees with respect to the diameter horizontal direction, an inclination angle (101) of 45 degrees, an SWP material having a wire diameter of 0.4 mm, an average diameter of 1.7 mm, and a natural length of 2.8 mm. When installed in a compressed state of 2.6 mm and the movable range of the button (2) is designed to be 0.2 mm, the first torque is 10-15 N · cm and the second torque is 15-25 N · cm. In addition, it is possible to obtain a handle ring that idles at a torque different from the third torque of 4 to 7 N · cm and the fourth torque of 7 to 10 N · cm.

When the first to fourth torques are set from a wider range of torques, the handle ring, the button, and the latch are structured as shown in FIG. 9, and two types of springs having different diameters and different lengths are used. By adopting such a form, different springs can be made to function in accordance with the direction of rotation of the driver (10), so that it is possible to select the idling torque from a wider range.

The inner diameter of the driver insertion portion (4), that is, the handle ring (1) is similar to the outer diameter of the handle (11) of the driver (10) that can be used together. If the inner diameter of the handle (11) is less than 5 mm, the driver (10 ) Since the operability when the single unit, that is, the handle (11) is driven with fingers is inferior, it is preferably 5 mm or more. When the shape of the handle ring is a disc shape, the inner diameter φ is set to 5 mm or more.

The larger the outer diameter of the handle ring (1), the higher the torque can be applied with fingers, but the outer diameter is preferably 20 mm or less in consideration of operability in a narrow oral cavity. In the case of a disc shape, the outer diameter φ is set to 20 mm or less.

The button (2) can be of various shapes and sizes as long as the effects of the present invention are not impaired as shown in FIGS. 8, 8C, 9 and 10, but it protrudes from the outer shape of the handle ring (1). The size is preferably 10 mm or less in view of workability in a narrow oral cavity, and more preferably 5 mm or less. 8 to 9, the button (2) protrudes from the side surface of the handle ring (1). However, the button (2) may be installed on the upper surface and / or the lower surface side in the structure shown in FIGS. it can.

In the present invention, a known spring such as a leaf spring as shown in FIG. 12 can be widely used instead of the coil spring, and the same effect can be obtained.

Furthermore, a slide mechanism can be provided as shown in FIGS. 11, 13 and 14 to provide a slide type torque adjustment mechanism. When a leaf spring is used as shown in FIG. The idling torque can be selected, and can be widely used according to the recommended torque of various dental implant components.

In consideration of operability in the oral cavity, the thickness of the handle ring is preferably 3 mm or more and 10 mm or less.

The number of latches may be appropriately combined, and increasing the number of each function increases the number of times that the latch mechanism can be used. Depending on the inner and outer diameters of the handle ring adopting the shape as described above, a plurality may be provided at close positions or at regular intervals.

Moreover, it is preferable that the height of the protrusion part of a latch is 0.2-3.0 mm from a viewpoint of a better fitting with a cam or idling.

In order to reduce the play at the time of driving, it is preferable that the number of cams (12) of the driver that can be used in combination is large.

The handle ring of the present invention can be made of any material such as stainless steel, titanium, or a titanium alloy. Among them, stainless steel is preferable from the viewpoint of improving the above control.
As a material of the latch provided integrally or separately with the handle ring of the present invention, it can be manufactured from any material such as stainless steel, titanium or titanium alloy, plastic, synthetic resin, etc. Stainless steel is preferable from the viewpoint of improvement.
Moreover, as a material of the spring of this invention, it can manufacture with arbitrary materials, such as stainless steel, a hard steel wire, a piano wire, silicon chrome steel, phosphor bronze, beryllium copper, cold rolled steel.

The handle ring of the present invention makes it possible to perform dental implant treatment more simply and more quickly. In addition, the present invention can be adapted to any driver of a dental implant as appropriate and has a wide application range. Therefore, the present invention can be widely used in the field of dental implant treatment.

It is the operation front schematic which fixes a dental implant to a jawbone using the driver with which the drive tool was mounted | worn. It is front sectional drawing at the time of mounting | wearing of the abutment to the dental implant through an abutment screw. It is a perspective front view showing an electric bone surgery instrument including a contra-angle. It is a front view of the driver for contra angles. It is a front view of a driver. It is a front view of a torque wrench with a latch function. It is a top view which shows the handle | steering-wheel for handle | steering-wheel diameter expansion (without a latch function), and its driver. FIG. 3 is a front cross-sectional view of one preferred embodiment of the handle ring of the present invention. It is one front view of preferred embodiment of the handle ring of the present invention. FIG. 8B is a plan view of the handle ring shown in FIG. 8A. It is an internal structure top view of the handle ring shown to FIG. 8A. 1 is a cross-sectional plan view of one preferred embodiment of the handle ring of the present invention. FIG. 3 is a front cross-sectional view of one preferred embodiment of the handle ring of the present invention. FIG. 2 is a perspective view and a plan sectional view of one preferred embodiment of the handle ring of the present invention. It is an internal structure top view of one suitable embodiment of the handle ring of the present invention. It is an internal structure top view of one suitable embodiment of the handle ring of the present invention. It is an internal structure top view of one suitable embodiment of the handle ring of the present invention. It is a top view when a driver is mounted on the handle ring shown in FIG. 8B. FIG. 9 is a half sectional plan view of one preferred embodiment with a driver mounted on the handle ring shown in FIG. 8B and the latch (3) and cam (12) being mated.

A Dental implant A1 Screw B B Abutment C Implant driver D Abutment screw E Electric bone surgery instrument F Contra-angle F1 Contra-angle handle G Contra-angle driver H Torque wrench 1 Handle ring 2 Button 3 Latch 4 Driver Insertion section 5 Coil spring 6 Leaf spring 7 Cover 10, 15 Driver 11 Handle 12 Cam 13 Drive section 14 Driver center line 16 Slide mechanism 17 Cutout section 100, 101 Latch inclined section

Claims (8)

A ring-shaped driving device (handle ring) used for fastening a dental implant component or the like, wherein a hollow portion is provided in a part of the handle ring so that a plurality of stages of torque can be selectively obtained. The cover and the driver insertion portion are further provided so that the button and the spring are engaged with each other, and the spring and the latch having the protruding portion directed in the axial direction of the handle ring are engaged with each other. A handle ring having an inner diameter of 5 mm or more and an outer diameter of 20 mm or less. A slide type torque adjusting mechanism provided with a slide mechanism in the cut-out portion ;
Handle ring according to claim 1, characterized in that the. 3. The driver insertion portion is a cavity.
Handle ring as described in. The handle ring according to claim 1, wherein the shape is a disk shape. The handle ring according to claim 1, wherein the protrusion of the latch has a height of 0.2 to 3.0 mm. 6. The handle ring according to claim 1, wherein the protruding portion has a tapered shape. The handle ring according to claim 6, wherein the protrusion has a tapered asymmetric shape. The handle ring according to any one of claims 1 to 7, wherein a thickness is 3 mm or more and 10 mm or less.