TWI763053B - Dental handpiece limiting sleeve structure and implant limit tool set and implant guide limit tool set thereof - Google Patents

Abstract

A handpiece limiting sleeve structure in the present creation includes a C-shaped plate, a head adapting structure and a C-shaped tube structure. The C-shaped plate has a concave notch, a first side and a second side opposite to each other. The head adapting structure is arranged on the first side, and has a first lateral opening connected with the concave notch. The C-shaped tube structure is arranged on the second side and has a second lateral opening connected with the concave notch. The outer diameter of the C-shaped tube structure is smaller than that of the C-shaped plate. This creation limit the maximum cutting depth of drilling when implanting a tooth, the handpiece and the cutter will not sway or shake, and the handpiece limiting sleeve structure does not occupy the surgical operating space.

Description

Handpiece limit guide cylindrical structure and its implant limit tool set and implant guide limit tool set

The present invention relates to a guide sleeve, especially a guide sleeve which is suitable for a dental handpiece and can limit the drilling depth.

With the development of dental technology, more and more patients choose to use dental implants to solve the problem of missing teeth. Dental implant is a metal implant (artificial tooth root) placed in the alveolar bone of the mouth to replace the original tooth root. After a period of time when the implant is tightly integrated with the bone, an artificial crown or bridge is installed to restore its aesthetics and chewing function.

Dental implant is an invasive dental restoration technique. Before the metal implant is implanted in the alveolar bone, a handpiece must be used to cut a hole of appropriate size in the alveolar bone. A knife of appropriate size is installed on the mobile phone, and the doctor drives the knife to drill holes in the alveolar bone by holding the mobile phone. However, in most cases, there are other teeth on both sides of the drilling position, and the patient's opening is limited, which limits the operating space for cutting. On the other hand, during the drilling process, physicians must carefully correct visually to avoid improper holes that cannot be recalled, such as excessive depth and deflection. But in most cases, cutting will produce a lot of chips and blood splatter at the same time, which will affect the vision. The dilemma is that the prolonged operation time due to careful manipulation will seriously affect the safety and comfort of the patient.

At present, there are advanced designs that install additional knives between the knife and the mobile phone With relay sleeve. The outer side and the inner side of the tool relay sleeve are rotatably combined. The upper part of the tool relay sleeve is combined with the mobile phone, the inner part is combined with the lower part of the tool, and another handle bites the outside of the tool relay sleeve. When the operator starts the tool and holds the handle in one hand, the outer side of the tool relay sleeve does not rotate, and the lower part of the non-rotating outer side forms an obstacle to the downward movement of the mobile phone, which can limit the cutting depth of the tool. However, several disadvantages of the prior art are that its elements add considerable bulk or height, making it difficult to maneuver in limited oral spaces, especially drilling for posterior molars. Then, the connection between the rotating member and the positioning member in the prior art must produce a certain degree of operational wear. Even, the structure of the conventional technique is complex and precise, resulting in extremely high manufacturing cost of the product.

Therefore, there is an urgent need in the art for a dental implant drilling solution to solve the above problems.

In view of this, one scope of the present invention is to provide a cylindrical structure for limiting and guiding a handpiece. The head limiting and guiding cylindrical structure of the present invention is simple in structure, low in manufacturing cost, small in volume, and does not require additional operating space; during operation, the head limiting and guiding cylindrical structure does not directly contact the cutter, and there is no problem of operation wear. The handpiece limiting and guiding cylindrical structure of the present invention is also beneficial to intuitively stop at an appropriate depth when drilling, and can easily replace the handpiece limiting and guiding cylindrical structure of different specifications, thereby shortening the operation time.

The head limiting and guiding cylindrical structure of the present invention is used to limit the drilling depth of the hand-held tool. The hand-held implement includes a handpiece. The machine head limit and guide cylindrical structure includes a C-shaped plate, a machine head adaptation structure and a C-shaped tube structure. The C-shaped plate has a concave notch and a first side and a second side opposite to each other. The handpiece adapting structure is arranged on the first side, and has a first lateral opening communicating with the concave notch. The machine head accommodating space in the machine head adaptation structure. The C-shaped tube structure is arranged on the second side, and has a second lateral opening communicating with the concave notch. The outer diameter of the C-type pipe structure is smaller than the outer diameter of the C-type plate, so as to facilitate the structure of the C-type pipe. The structure penetrates deep into the drilled position between the teeth.

The outer shape of the machine head fitting structure is a straight cylindrical shape extending outward from the first side of the C-shaped plate; the outer shape of the C-shaped tube structure is a circular and straight cylindrical shape extending outward from the second side of the C-shaped plate.

The C-shaped plate has a virtual vertical axis and a central through hole, the central through hole communicates with the concave notch, and the virtual vertical axis passes through the central through hole. The C-tube structure, the handpiece fitting structure, the first lateral opening and the second lateral opening are each parallel to the virtual vertical axis.

Wherein, the cross section of the machine head adapting structure forms a first arc. Both ends of the first arc shape extend to a first angle with the virtual vertical axis as the center, and the first angle is between 160 degrees and 210 degrees.

The cross section of the C-shaped tube structure forms a second arc shape, and both ends of the second arc shape extend to a second angle with the virtual vertical axis as the center of the circle, and the second angle is at least 220 degrees.

Among them, the C-shaped plate, the machine head adapting structure and the C-shaped tube structure are integrally formed metal structures and are made by 3D printing.

Wherein, the accommodating space of the machine head corresponds to the shape of the machine head, so that the machine head can be detachably combined with the machine head fitting structure, and the first side of the C-shaped plate is for the machine head to abut against. The length of the inner diameter of the machine head fitting structure is greater than the length of the inner diameter of the concave notch.

Another scope of the present invention is to provide a dental implant limiting tool set, which includes a hand-held tool and a plurality of handpiece limiting and guiding cylindrical structures. Handheld implements contain handpieces. The machine head limiting and guiding cylindrical structures can be respectively sleeved outside the machine head, and each machine head limiting and guiding cylindrical structure further includes a C-shaped plate, a machine-head fitting structure and a C-shaped pipe structure. The C-shaped plate has a concave notch and a first side and a second side opposite to each other. The handpiece adapting structure is arranged on the first side, and has a first lateral opening communicating with the concave notch. The machine head accommodating space in the machine head adaptation structure. The C-shaped tube structure is arranged on the second side, And a second lateral opening communicates with the concave notch. The length of the outer diameter of the C-shaped pipe structure is smaller than the length of the outer diameter of the C-shaped plate.

Another scope of the present invention is to provide an implant guide and limiting tool set, used in conjunction with a hand-held tool, comprising a plurality of handpiece limiting and guiding cylindrical structures and an implant guide sleeve. Handheld implements contain handpieces. A plurality of head limiting and guiding cylindrical structures can be respectively sleeved outside the head of the hand-held tool, and each head limiting and guiding cylindrical structure further includes a C-shaped plate, a head-adapting structure and a C-shaped tube structure. The C-shaped plate has a concave notch and a first side and a second side opposite to each other. The handpiece adapting structure is arranged on the first side, and has a first lateral opening communicating with the concave notch. The machine head accommodating space in the machine head adaptation structure. The C-shaped tube structure is arranged on the second side, and has a second lateral opening communicating with the concave notch. The length of the outer diameter of the C-shaped pipe structure is smaller than the length of the outer diameter of the C-shaped plate.

The implant guide sleeve guides the handpiece to limit and guide the cylindrical structure to move axially, and further has a top opening, a third lateral opening, a first axial guide hole and a second axial guide hole. The top opening is located at one end of the implant guide sleeve. The third lateral opening extends from the top opening to the other end of the implant guide sleeve. The first axial guide hole is matched with the machine head adapting structure of the machine head limiting and guiding cylindrical structure. The second axial guide hole cooperates with the C-shaped tube structure of the machine head limiting and guiding cylindrical structure, and the aperture length of the second axial guide hole is smaller than the aperture length of the first axial guide hole.

1: Machine head limit guide cylindrical structure

1P~1S: Head limit guide cylindrical structure

10: C-type plate

12: Machine head adaptation structure

14: C-tube structure

14P~14S: C-tube structure

100: concave notch

101: First side

102: Second Side

105: Center through hole

120: First lateral opening

127: Protruding tenon

140: Second lateral opening

141: Tool through the exit

145: Tool accommodating space

A1: The first angle

A2: Second angle

2: Handheld equipment

20: nose

22: Handheld implement arm

201: Tool installation side

3: Knives

30: Handle

31: Knife tip

4: Alveolar bone

5: Implant guide sleeve

50: top opening

51: The first axial guide hole

52: Second axial guide hole

54: Guide sleeve tool perforation

55: tooth die fixing element

D0, D1, D2, D4: diameter length

X: parallel to the axial direction of the tool

Y: virtual vertical axis

FIG. 1A is an exploded view of the cylindrical structure of the handpiece limiting guide according to an embodiment of the present invention; FIG. 1B is a side view of the cylindrical structure of the handpiece limiting and guiding according to the specific embodiment of FIG. 1A ; FIG. 1C is a top view of the head limiting and guiding cylindrical structure according to the specific embodiment of FIG. 1A ; FIG. 1D is a bottom view of the head limiting and guiding cylindrical structure according to the specific embodiment of FIG. 1A ; FIG. 2 is a schematic view of the handpiece limiting and guiding cylindrical structure of FIG. 1A combined with a hand-held tool; FIG. 3A is a perspective view of the handpiece limiting and guiding cylindrical structure according to an embodiment of the present invention; FIG. 3B is a Figure 3C is a schematic diagram of using the handpiece limiting and guiding cylindrical structure 1R of Figure 3B to cooperate with the hand-held tool to drill holes; Figure 3D is a schematic diagram of 3B is a schematic diagram of using the handpiece limiting and guiding cylindrical structure 1P to cooperate with the hand-held tool for drilling; FIG. 4A is a schematic diagram of the first arc angle of the handpiece limiting and guiding cylindrical structure according to FIG. 1A; 1A is a schematic diagram of the second arc angle of the handpiece limiting and guiding cylindrical structure; FIG. 5 is a schematic diagram of a dental implant limiting tool set according to an embodiment of the present invention; FIG. 6 is a schematic diagram of a specific embodiment of the present invention. A schematic diagram of the implant guide and limiting tool set of the embodiment.

In order for the advantages, spirit and features of the present invention to be more easily and clearly understood, the following will be detailed and discussed with reference to the accompanying drawings by way of embodiments. It should be noted that these embodiments are only representative of the present invention. But it can be implemented in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The terms used in the various embodiments disclosed herein are for the purpose of describing particular embodiments only, and are not intended to limit the various embodiments disclosed herein. The singular forms as used herein also include the plural forms unless the context clearly dictates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present disclosure belong. The above terms (such as those defined in commonly used dictionaries) are to be construed as having the same meaning as in the context of the same technical field, and shall not be construed as having an idealized meaning or in an overly formal sense, unless explicitly defined in the various embodiments of the present disclosure.

Please refer to FIGS. 1A to 1D and FIG. 2 . 1A to 1D are an exploded view, a side view, a top view, and a bottom view of a cylindrical structure 1 for limiting and guiding a handpiece according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the hand-held device combined with the head limiting and guiding cylindrical structure of FIG. 1A . The handpiece limiting and guiding cylindrical structure 1 of the present invention is used to be installed on the hand-held tool 2 and to limit the drilling depth of the hand-held tool 2 . The hand tool 2 includes a handpiece 20 for connecting the cutter 3 . The head limiting and guiding cylindrical structure 1 includes a C-shaped plate 10 , a head fitting structure 12 and a C-shaped pipe structure 14 . The C-shaped plate 10 has a concave notch 100 and a first side 101 and a second side 102 opposite to each other. The handpiece adapting structure 12 is disposed on the first side 101 , and has a first lateral opening 120 communicating with the concave notch 100 . There is a head accommodating space in the head fitting structure 12 . The C-shaped tube structure 14 is disposed on the second side 102 and has a second lateral opening 140 communicated with the inner recess 100 . The inner diameter length D2 of the handpiece adapting structure 12 is greater than the diameter length D1 of the central through hole 105 , so that the first side 101 of the C-shaped plate 10 can be used when the handpiece limiting and guiding cylindrical structure 1 is assembled to the hand-held tool 2 . The nose 20 abuts. The outer diameter length D4 of the C-shaped tube structure 14 is smaller than the outer diameter length D0 of the C-shaped plate 10, so that the C-shaped tube structure 14 can penetrate into the space between the teeth for drilling.

The hand-held implement 2 may be a handpiece commonly used in dental surgery, and is used for setting the cutter 3 . The tool 3 is a dental tool, or a dental drill, which can be mounted on the hand-held tool 2 . The C-type plate 10 is not limited to the plate type; between the machine head adapting structure 12 and the C-type pipe structure 14 , structures that can provide the same function can be regarded as one type of the C-type plate 10 .

The outer shape of the head adapting structure 12 is a straight cylindrical shape extending outward from the first side 101 of the C-shaped plate 10 , and the inner head accommodating space can accommodate and fasten the head 20 . The round and cylindrical shape here means that the shape is relatively free of edges and corners, is roughly circular, and at least one of the two ends has an opening. The inner shape of the handpiece fitting structure 12 corresponds to the structure of the handpiece 20 , and can elastically engage the handpiece 20 in structure. Type C The external shape of the tube structure 14 is a straight cylindrical shape extending outward from the second side 102 of the C-shaped plate 10 . Even, the C-shaped tube structure 14 can be designed in a non-circular shape, such as an oval shape, a polygonal shape, a concave shape, etc., in order to conform to the interdental space.

The head limiting and guiding cylindrical structure 1 of the present invention is simple in structure and low in manufacturing cost. In addition, the volume of the handpiece limiting and guiding cylindrical structure 1 installed on the hand-held implement 2 is almost equal to the original volume of the hand-held implement 2, so the handpiece limiting and guiding cylindrical structure 1 does not occupy the operation space. Since the head limiting and guiding cylindrical structure 1 of the present invention is fixed on the head 20, instead of being installed between the head and the cutter in the prior art, the length of the cutter will not be extended, and the mouth will not be opened. Amplitude or drill location limitations. Furthermore, the head limiting and guiding cylindrical structure 1 does not directly contact the cutter 3, and the head limiting and guiding cylindrical structure 1 does not need a rotating element, and will not be worn during operation. The machine head limiting and guiding cylindrical structure 1 is clamped on the machine head 20 by the structure, and can be disassembled and assembled by simply applying force, which is convenient and quick to replace. In addition, the head limiting and guiding cylindrical structure 1 and the cutter 3 are highly independent, and the cutter 3 does not need to be disassembled first to replace the head limiting and guiding cylindrical structure 1; on the contrary, the cutter 3 does not need to be disassembled first. The head limit guide cylindrical structure 1. Finally, since the hand-held tool 2 will have a water spray port to spray water toward the tool, the design of the side opening allows water to be sprayed to the drill hole, so as to smoothly cool the operating temperature and remove blood and water debris.

In a specific embodiment, the C-type plate 10 , the head fitting structure 12 and the C-type tube structure 14 are three components, which are assembled, joined, clamped or welded to each other to form the head limit guide cylinder. Structure 1.

In another specific embodiment, the C-shaped plate 10 , the head fitting structure 12 and the C-shaped tube structure 14 are integrally formed metal structures, and are additively manufactured by means of three-dimensional metal printing. The integrally formed metal structure can improve the structural stability and elasticity of the head limit guide cylindrical structure 1 The toughness is favorable for being installed on the hand-held tool 2, and it is not easy to disassemble during the drilling operation with high torque. Compared with subtractive manufacturing, additive manufacturing is more suitable for the special and small head limiting and guiding cylindrical structure of the present invention. The handpiece accommodating space corresponds to the shape of the handpiece 20 , so that the handpiece 20 can be detachably combined with the handpiece adapting structure 12 . One end of the head adapting structure 12 is engaged with the C-shaped plate 10, and the other end may be a full opening, a tapered opening or no opening, but all can form a head accommodating space.

Please refer to FIGS. 3A to 3D . 3A and FIG. 3B are perspective views of a cylindrical structure for limiting and guiding a handpiece according to various embodiments of the present invention. There is a tool accommodating space 145 in the C-shaped tube structure 14 for the tool 3 to pass through. The other end of the C-shaped tube structure 14 is a tool penetration opening 141 , so that the tool 3 can penetrate through the tool recess 100 , the tool accommodating space 145 and the tool penetration opening 141 . That is, when the hand tool 2 is equipped with the cutter 3 and operates, the cutter 3 and the C-shaped tube structure 14 are not in direct contact.

As shown in FIG. 3A and FIG. 3B , the operator can determine the cutter 3 by replacing the head limiting and guiding cylindrical structures 1P to 1S of C-tube structures with different lengths (for example, C-tube structures 14P to 14S). The exposed length of the tool through the outlet 141 of the C-shaped pipe structure 14 determines the drilling depth. 3C and 3D are schematic diagrams of drilling holes using the handpiece limiting and guiding cylindrical structure 1R and the handpiece limiting and guiding cylindrical structure 1P of FIG. 3B . As shown in FIGS. 3C and 3D , the handpiece limiting and guiding cylindrical structure 1 is fixed on the handpiece 20 . ), the C-shaped pipe structure 14 abuts the working plane and restricts the movement of the machine head 20 to the working plane. Correspondingly, the tool 3 driven by the handpiece 20 cannot drill any further. Therefore, the C-tube structure 14 limits the drilling depth.

As mentioned above, the drilling depth can be determined by selecting the handpiece limiting and guiding cylindrical structure of the C-shaped tube structure with different lengths. For example, when the operator wants to use the cutter 3 to drill a shallower hole in the alveolar bone 4 When making holes, the hand-held tool 2 can be mounted on the hand-held tool 2 by using the handpiece limiting and guiding cylindrical structure 1R having a longer C-shaped tube structure 14R. At this time, the portion of the cutter 3 exposed from the C-shaped tube structure 14R is less, so the drilling is shallow. When the operator wants to use the same tool 3 to drill a deeper hole in the alveolar bone 4, he can choose the handpiece limiting and guiding cylindrical structure 1P with a shorter C-shaped tube structure 14P to replace and install the hand-held tool 2 . At this time, the portion of the cutter 3 exposed from the C-shaped tube structure 14P is more, so the drilling is deeper.

With the present invention, after the operator selects the drilling depth, he replaces the head limiting and guiding cylindrical structure 1 of relative length, and after determining the position and angle of the drilling, he can intuitively drill deeply. When the preset drilling depth is reached, the operator can feel that the hand-held implement 2 is blocked and stopped, and does not need to continuously and repeatedly visually assess the drilling depth.

Since the shank 30 of the tool 3 is generally smaller in diameter, the hole length of the recess 100 in the tool can be narrower, so that the first side 101 of the C-shaped plate 10 has a larger area for clamping the handpiece 20 . Since the diameter of the tool tip 31 of the tool 3 is usually large, and to prevent the C-shaped tube structure 14 from contacting the tool tip 31 and being worn, the tool accommodating space 145 and the tool piercing port 141 need to be wider in diameter to avoid residual damage during drilling. Chips accumulate in the tool accommodating space 145 .

In addition, a protruding tenon 127 may be provided on the top or side of the handpiece adapting structure 120 to hold the handpiece 20 to prevent the handpiece limiting and guiding the cylindrical structure 1 from slipping.

Please refer to FIG. 1A , FIG. 1B , FIG. 1C , FIG. 4A and FIG. 4B together. 4A and 4B are schematic diagrams of arc angles of the cylindrical structure of the handpiece limiting and guiding according to FIG. 1A . As shown in FIGS. 4A and 4B , the C-type plate 10 has a virtual vertical axis Y falling on the central axis of the C-type plate 10 . The C-shaped tube structure 14 and the handpiece fitting structure 12 each extend parallel to the virtual vertical axis Y. The C-shaped plate 10 has a central through hole 105 , the central through hole 105 communicates with the concave notch 100 , and the virtual vertical axis Y passes through the central through hole 105 . The cross section of the machine head adapting structure 12 forms a first arc. The two ends of the first arc are on the virtual vertical axis The line Y is an included angle extending along the center of the circle to form a first angle A1, and the first angle A1 is between 160 degrees and 210 degrees. Conversely, the first opening angle of the first lateral opening 120 with the virtual vertical axis Y as the center is between 150 degrees and 200 degrees. The size of the opening of the first lateral opening 120 is favorable for combining and clamping the handpiece 20 , and also for disassembling the handpiece 20 from the handpiece adapting structure 12 .

The cross section of the C-shaped tube structure 14 forms a second arc shape, and the two ends of the second arc shape extend along the virtual vertical axis Y as the center of the circle to form an included angle of a second angle A2, the second angle A2 is at least 220 degrees, The maximum is 340 degrees. Conversely, the second opening angle of the second lateral opening 140 with the virtual vertical axis Y as the center is between 20 degrees and 140 degrees. When the hand-held tool 2 is engaged with the head limiting and guiding cylindrical structure 1 in the manner shown in FIG. 2 , the second opening angle of the second lateral opening 140 allows the cutter to enter the C-shaped tube structure 14 through the hand-held tool. The jet of water from the spray hole can also be flushed to the drilling location.

See Figure 5. FIG. 5 is a schematic diagram of a dental implant limiting tool set according to an embodiment of the present invention. Another scope of the present invention is to provide a dental implant limiting tool set, which includes a hand-held tool 2 and a plurality of handpiece limiting and guiding cylindrical structures 1 . The hand-held tool 2 includes a handpiece 20 for driving a cutter, and the handpiece 20 has a cutter mounting side 201 . The head limiting and guiding cylindrical structures 1 can be respectively sleeved on the outside of the machine head 20 , and each head limiting and guiding cylindrical structure 1 is roughly the same as the head limiting and guiding cylindrical structure described in the previous embodiment. same. The handpiece 2 is detachably fixed in the handpiece adapting structure 12 , and the tool installation side 201 abuts against the first side 101 .

In addition, the length of the C-shaped tube structure 14 of each head limiting and guiding cylindrical structure 1 is different, such as 15mm, 17mm, 19mm, 21mm. The C-shaped pipe structures 14 of different lengths are used for drilling holes of different depths. For example, corresponding to the above-mentioned lengths of the C-shaped pipe structures 14 , cutting depths of 9 mm, 7 mm, 5 mm and 3 mm can be drilled respectively.

See Figure 2 and Figure 6. 6 is a schematic diagram of an implant guide and limiting tool set according to an embodiment of the present invention. In this specific embodiment, the dental implant guiding and limiting tool set is used in conjunction with the hand-held tool 2 . The dental implant guiding and limiting tool set includes a plurality of handpiece limiting and guiding cylindrical structures 1 and an implant guiding sleeve 5 . The functions of the hand-held tool 2 and the handpiece limiting and guiding cylindrical structure 1 are substantially the same as those of the previous embodiment, and will not be repeated here. The hand-held tool 2, the cutter 3 and the single handpiece limit guide cylindrical structure 1 are pre-assembled, and the implant guide sleeve 5 is pre-fixed on the surgical site, and the combined hand-held tool 2 and the single handpiece limit guide The cylindrical structure 1 can slide axially in the implant guide sleeve 5 . The implant guide sleeve 5 further has a top opening 50 , a third lateral opening (not shown), a first axial guide hole 51 and a second axial guide hole 52 . The top opening 50 is located at one end of the implant guide sleeve 5 . The third lateral opening extends from the top opening 50 to the other end of the implant guide sleeve 5 .

The inner wall of the first axial guide hole 51 is matched with the outer shape of the head fitting structure 12 of the head limiting and guiding cylindrical structure 1, so that the head limiting and guiding cylindrical structure 1 can be positioned in the first axial direction. The guide hole 51 moves axially inside.

The implant guide sleeve 5 further includes a dental mold fixing element 55 to fix the implant guide sleeve 5 on the teeth. There is a guide sleeve cutter hole 54 at the bottom of the implant guide sleeve 5 . The outer diameter of the head limiting and guiding cylindrical structure 1 is slightly smaller than the inner diameter of the first axial guide hole 51 , so the head limiting and guiding cylindrical structure 1 can guide the hole 51 in the first axial direction. Swipe up and down inside. Therefore, the tool 3 can be passed through the tool hole 54 of the guide sleeve to cut the alveolar bone.

In practical application, the operator holds the hand-held tool and moves the handpiece together with the handpiece limiting and guiding cylindrical structure 1 from the top opening 50 into the first axial guide hole 51, and down to the second axial guide hole. 52. The third lateral opening is used to allow the hand-held implement arm 22 communicating with the handpiece 20 to pass through. However, in order to allow passage of the hand implement arm 22, the third lateral opening requires a certain deployment angle. third The expansion angle of the lateral opening will make the handpiece 20 together with the handpiece limiting and guiding cylindrical structure 1 easy to tilt and shake to the outside of the third lateral opening, thereby causing the cutter 3 to deviate from the original drilling axis.

In order to prevent the handpiece 20 and the handpiece limiting and guiding cylindrical structure 1 from tilting to the outside of the third lateral opening, the present invention further designs a second axial guide hole 52 with a narrower aperture and a larger covering angle. The second axial guide hole 52 cooperates with the C-shaped tube structure 14 of the head limiting and guiding cylindrical structure 1 , and the diameter of the second axial guide hole 52 is smaller than that of the first axial guide hole 51 . At this time, the inner wall connecting the first axial guide hole 51 and the second axial guide hole 52 has two concave and convex turns. The first axial guide hole 51 and the second axial guide hole 52 can guide the handpiece to limit and guide the cylindrical structure 1 to move axially in two stages. The second axial guide hole 52 accommodates the C-shaped tube structure 14 , and when the C-shaped tube structure 14 penetrates into the second axial guide hole 52 , the angle at which the second axial guide hole 52 wraps the C-shaped tube structure 14 is greater than The first axial guide hole 51 covers the angle of the handpiece adapting structure 12 . Therefore, by covering the C-shaped tube structure 14 with the second axial guide hole 52 , the machine head 20 and the cutter 3 are less likely to tilt and shake, and the drilling axis can be stabilized.

To sum up, the cylindrical structure of the limit guide of the handpiece of the present invention is mainly beneficial for the operator to grasp the cutting depth when drilling. The head limiting and guiding cylindrical structure of the present invention is simplified, and the manufacturing cost is low; the volume is small, and no additional operating space is required; the head limiting and guiding cylindrical structure does not directly contact the cutter during operation, and there is no problem of operation wear. And can easily replace different specifications of the handpiece limit guide cylindrical structure, shorten the operation time. The use of the implant guide sleeve of the present invention can limit the radial movement or inclination of the handpiece limiting and guiding cylindrical structure, so that the hand-held tool can move stably in the axial direction.

Through the detailed description of the above specific embodiments, it is hoped that the features and spirit of the present invention can be described more clearly, but the scope of the present invention is not limited by the specific embodiments disclosed above. On the contrary, the intention is to cover various modifications and equivalent arrangements in the present invention within the scope of the patent to be applied for.

10: C-type plate

12: Machine head adaptation structure

14: C-tube structure

100: concave notch

120: First lateral opening

140: Second lateral opening

Claims (10)

A handpiece limiting and guiding cylindrical structure is used to limit the drilling depth of a hand-held tool. The hand-held tool includes a handpiece. a concave notch and a first side and a second side opposite to each other; a handpiece fitting structure is arranged on the first side, and a first lateral opening communicates with the concave notch, and the handpiece fitting structure is inside There is a head accommodating space, the shape of the head accommodating space corresponds to the shape of the outer side of the head, the opening of the head fitting structure away from one end of the C-shaped plate is a tapered opening, and the head fitting structure is from The first lateral opening is detachably and elastically engaged with the handpiece; and a C-shaped tube structure is disposed on the second side, and a second lateral opening communicates with the concave notch, outside the C-shaped tube structure The diameter is smaller than the outer diameter of the C-shaped plate. The head limiting and guiding cylindrical structure described in claim 1, wherein the outer shape of the head adapting structure is a straight cylindrical shape extending outward from the first side of the C-shaped plate, and the C The outer shape of the shaped tube structure is a straight cylindrical shape extending outward from the second side of the C-shaped plate. The head limiting and guiding cylindrical structure as described in claim 1, wherein the C-shaped plate has a central through hole and a virtual vertical axis, the central through hole communicates with the concave notch, and the virtual vertical axis Passing through the central through hole, the C-shaped tube structure and the head fitting structure are each parallel to the virtual vertical axis. The head limiting and guiding cylindrical structure as described in claim 3, wherein the cross section of the head adapting structure forms a first arc, and both ends of the first arc are aligned with the virtual vertical axis The center of the circle extends to a first angle, and the first angle is between 160 degrees and 210 degrees. The cylinder-shaped structure for limiting and guiding the handpiece as described in item 3 of the scope of the application, wherein the C-shaped tube structure The transverse section forms a second arc shape, and both ends of the second arc shape extend to a second angle with the virtual vertical axis as the center of the circle, and the second angle is at least 220 degrees. The head limiting and guiding cylindrical structure as described in claim 3, wherein the length of the inner diameter of the head fitting structure is greater than the length of the diameter of the central through hole. The head limiting and guiding cylindrical structure as described in claim 1, wherein the C-shaped plate, the head fitting structure, and the C-shaped pipe structure are integrally formed metal structures, and are formed by 3D printed. According to the handpiece limiting and guiding cylindrical structure described in item 1 of the scope of the patent application, wherein the handpiece accommodating space corresponds to the outer shape of the handpiece, so that the handpiece can be detachably combined with the handpiece adapting structure, The first side of the C-shaped plate is for the head to abut against. A dental implant limiting tool set, including: a hand-held tool, including a handpiece; and a plurality of handpiece limit guide cylindrical structures, which can be respectively sleeved outside the handpiece, each handpiece limit The guiding cylindrical structure further includes: a C-shaped plate with a concave notch and a first side and a second side opposite to each other; a machine head matching structure, which is arranged on the first side and has a first side. A side opening is connected to the concave notch, and there is a head accommodating space in the head fitting structure, the shape of the head accommodating space corresponds to the shape of the outer side of the head, and the head fitting structure is far away from the C-shaped plate The opening at one end is a tapered opening, and the handpiece adapting structure is detachable and elastically engaged with the handpiece from the first side opening; and a C-shaped tube structure is arranged on the second side and has a first The two lateral openings communicate with the inner Concave notch, the outer diameter of the C-shaped pipe structure is smaller than the outer diameter of the C-shaped plate. A dental implant guiding and limiting tool set, used in conjunction with a hand-held tool, comprising: a plurality of handpiece limiting and guiding cylindrical structures, which can be respectively sleeved outside one handpiece of the hand-held tool, and each machine head The head limiting and guiding cylindrical structure further includes: a C-shaped plate with a concave notch and a first side and a second side opposite to each other; a machine head adapting structure, arranged on the first side, There is also a first lateral opening communicating with the concave notch, a head accommodating space in the head fitting structure; and a C-shaped pipe structure, which is arranged on the second side, and has a second lateral opening communicating with the head. A concave notch, the length of the outer diameter of the C-shaped tube structure is smaller than the length of the outer diameter of the C-shaped plate; and an implant guide sleeve, which guides the axial movement of the handpiece limiting and guiding cylindrical structure, and further has: a top opening located at one end of the implant guide sleeve; a third lateral opening extending from the top opening to the other end of the implant guide sleeve; a first axial guide hole communicating with the top opening and the third lateral opening, in cooperation with the head fitting structure of the head limiting and guiding cylindrical structure, the shape of the head accommodating space corresponds to the outer shape of the head, and the head fitting structure is far away from the The opening at one end of the C-shaped plate is a tapered opening, and the handpiece adapting structure is detachably and elastically engaged with the handpiece from the first lateral opening; and a second axial guide hole communicates with the first side opening. The axial guide hole is matched with the C-shaped tube structure of the head limiting and guiding cylindrical structure, and the aperture length of the second axial guide hole is smaller than the aperture length of the first axial guide hole.

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