Minimally invasive bone spreader for dental implant

Abstract

The utility model relates to the field of dental equipment, in particular to a minimally invasive bone spreader for dental implant. The utility model provides a minimally invasive bone dilator for dental implant, which comprises a handle, a support head for being inserted into an alveolar bone extends forwards from the front end of the handle, the front end of the support head is conical, the front part of the support head is small, and the rear part of the support head is large. According to the minimally invasive bone spreader for tooth implantation, an implantation space with a proper size can be easily formed at a thin part of an alveolar bone, so that the time is saved, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of dental equipment, in particular to a minimally invasive bone spreader for dental implants. Background Art

[0002] Dental implant surgery is a tooth-missing repair surgery, which requires / specifically implanting a lower structure (called an implant) into the alveolar bone of the patient's mouth and fixing the dental restoration on top of the implanted lower structure. Dental implants can achieve a repair effect that is very similar to the function, structure and aesthetic effect of natural teeth, and have become the preferred repair method for more and more patients with missing teeth. In order to implant the implant into the alveolar bone, it is necessary to first drill the alveolar bone with an electric drill to make the alveolar bone partially missing, forming an implantation space for the implant to be installed; after the implant is installed, the alveolar bone will slowly grow and recover over a period of several months to more firmly wrap and fix the implant. After the implant is fixed by the alveolar bone, the dental restoration can be installed on the implant. Because the size of the alveolar bone corresponding to different teeth is slightly different, for example, the width of the alveolar bone corresponding to the large teeth is thicker, while the width of the alveolar bone corresponding to the lower front teeth (or upper front teeth) is thinner. When the above-mentioned dental implant surgery needs to be performed on the thicker width of the alveolar bone, the operator can hold an electric drill and drill out a suitable size of implant space directly on the thicker width of the alveolar bone, and the implant can be directly loaded into the implant space. For the thinner width of the alveolar bone, the above-mentioned dental implant surgery cannot be performed directly. If the implant space of the right size is drilled directly on the thinner width of the alveolar bone, the wall thickness of the alveolar bone will be too thin. In severe cases, the implant space is easy to penetrate the side wall of the alveolar bone, affecting the implant effect. For the thinner width of the alveolar bone, it is often necessary to artificially increase its width in practice. The specific operation is to fill bone powder in the width direction of the alveolar bone. After the bone powder is shaped, it is used as an extension of the alveolar bone in the width direction, so that the width of the alveolar bone becomes thicker. Then, as described above, a suitable size of implant space is drilled on the thickened alveolar bone, and then the implant can be loaded into the implant space. The above-mentioned operation of filling bone powder will cause a larger oral wound in the patient, and the shaping of the bone powder takes a long time, and the operation process is relatively inconvenient. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a minimally invasive bone spreader for dental implants, which can easily form an implantation space of suitable size on a thinner width of the alveolar bone, is time-saving and convenient to operate.

[0004] To solve the above problems, the utility model provides a minimally invasive bone spreader for dental implants, including a handle, a support head extending forward from the front end of the handle for insertion into the alveolar bone, the front end of the support head is conical, with a small front part and a large rear part.

[0005] Furthermore, the front-rear axis of the support head is not colinear with the front-rear axis of the handle.

[0006] Furthermore, the front-rear axis of the support head and the front-rear axis of the handle are parallel to each other.

[0007] Furthermore, a bent rod is provided between the handle and the support head for connection.

[0008] Furthermore, a limiting member is provided for limiting the insertion depth of the support head, and the limiting member can be positioned after adjusting the front-rear axial position relative to the support head.

[0009] Furthermore, the limiting member is sleeved on the outside of the front end of the bending rod and / or the outside of the rear end of the supporting head in a threaded connection manner, and rotates forward and reversely around its own axis to achieve the front-rear axial position adjustment.

[0010] Furthermore, the limiting component is divided into a front limiting portion and a rear anti-retreat portion, the limiting portion and the anti-retreat portion are respectively threadedly connected to the bending rod and / or the support head, and the anti-retreat portion moves forward to press forward against the limiting portion to achieve the positioning; the support head is provided with a scale mark for the limiting portion to align.

[0011] Furthermore, the cross section of the support head has four edges, forming a "cross" shape, any two adjacent edges are perpendicular to each other and any two opposite edges are collinear.

[0012] Furthermore, the four edges are divided into two groups, with two collinear edges forming one group. Among the two groups, one group is the long edges and the remaining group is the short edges.

[0013] Furthermore, the connecting surface between any two adjacent edges is an inwardly concave surface.

[0014] Beneficial effect: When it is necessary to form a planting space of suitable size on the thinner width of the alveolar bone, the operator first uses an electric drill to drill a positioning hole on the alveolar bone (the size of the positioning hole is smaller than the planting space), and then inserts the support head of the bone spreader of the utility model into the positioning hole, and moves the handle of the bone spreader back and forth along the width direction of the alveolar bone, thereby driving the inserted support head to pry the alveolar bone back and forth along the width direction of the alveolar bone. Since the alveolar bone is a loose structure composed of bone powder and has no elasticity, the back and forth prying of the support head pushes the side wall of the alveolar bone outward along the width direction to expand it, thereby expanding the positioning hole to form a planting space of suitable size for the implant to be installed. Compared with the background technology of directly drilling the planting space on the alveolar bone, the use of the bone spreader of the utility model to perform the above-mentioned operation of expanding the positioning hole to form the planting space will not cause excessive loss of alveolar bone powder, and there is no need to fill the alveolar bone with bone powder in advance to thicken it, which is more time-saving and more convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram showing the structure of a minimally invasive bone distractor for dental implants.

[0016] Figure 2 The present invention is a simplified structural diagram showing that the limiting component of the minimally invasive bone distractor for dental implants is removed from the handle.

[0017] Figure 3 It is a schematic diagram of the structure of the support head from the front view.

[0018] Figure 4 It is a schematic diagram of the structure of the support head from a top view.

[0019] Explanation of symbols:

[0020] 1-bone spreader; 11-handle; 12-spreader head; 121-long edge; 122-short edge; 123-inner concave surface; 124-scale mark; 13-bent rod; 14-limiting member; 141-limiting part; 142-anti-retraction part. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with specific implementation methods.

[0022] Minimally invasive bone spreader for dental implants Figure 1, including a handle 11. A hard support head 12 is arranged in front of the handle 11, and its front end is conical, with a small front part and a large rear part. The front and rear axes of the handle 11 and the hard support head 12 are not colinear and are parallel to each other. A zigzag curved rod 13 is arranged between the two for connection. The front end of the curved rod 13 is fixedly connected to the hard support head 12 and the rear end is fixedly connected to the handle 11. When it is necessary to form a planting space of suitable size on a thin alveolar bone (not shown in the figure), the operator first uses an electric drill (not shown in the figure) to drill a positioning hole (not shown in the figure) smaller than the planting space on the alveolar bone, and then inserts the hard support head 12 of the bone spreader 1 of the utility model into the positioning hole, and moves the handle 11 of the bone spreader 1 back and forth along the width direction of the alveolar bone, thereby driving the inserted support head 12 to pry the alveolar bone back and forth along the width direction of the alveolar bone. Since the alveolar bone is a loose structure composed of bone powder and has no elasticity, the support head 12 pries back and forth to push the side wall of the alveolar bone outward in the width direction, thereby expanding the positioning hole to form a planting space of suitable size for the implant (not shown in the figure). Compared with the background technology of drilling the planting space directly on the alveolar bone, the use of the bone spreader 1 of the utility model to perform the above-mentioned operation of expanding the positioning hole to form the planting space will not cause excessive loss of alveolar bone powder, and there is no need to fill the alveolar bone with bone powder in advance to thicken it, which is more time-saving and convenient to operate. Since the hard support head 12 is conical, the front part is small and the rear part is large, the deeper the conical hard support head 12 is inserted into the positioning hole, the larger the positioning hole can be opened under the same circumstances (the deeper the support head 12 is inserted, the larger the prying amplitude), and the operator controls the insertion depth of the hard support head 12 as needed to open the positioning hole to form planting spaces of different sizes. Not preferably, the operator may not drill a positioning hole on the alveolar bone, but may directly use the hard support head 12 to press a depression at a suitable position of the alveolar bone as a positioning hole, and then pry the alveolar bone back and forth as described above to expand the depression to form an implantation space.

[0023] To avoid inserting the support head 12 too deep due to misoperation, Figure 1 and Figure 2A limiting member 14 is sleeved on the outer side of the connection between the curved rod 13 and the support head 12. The limiting member 14 is divided into a limiting portion 141 located in the front and an anti-retraction portion 142 located in the rear. The limiting portion 141 and the anti-retraction portion 142 are respectively threadedly connected to the curved rod 13 and / or the support head 12, and each can be adjusted in the front-back axial position relative to the support head 12 by rotating forward and reversely around its own axis. Before inserting the support head 12 into the positioning hole of the alveolar bone, the limiting portion 141 is first operated to rotate forward around its own axis so as to move forward axially to the rear part of the cone that blocks the hard support head 12, that is, the required exposed length of the cone of the support head 12 is obtained by adjusting the position of the limiting portion 141 in the front-back axial direction. Then, in the process of inserting the support head 12 into the positioning hole of the alveolar bone, even if an erroneous operation occurs, the insertion depth of the support head 12 is limited (will not exceed the exposed length), and the support head 12 will not be inserted too deep due to erroneous operation. After the limiting portion 141 is adjusted and moved into position, the anti-retraction portion 142 can be further operated to rotate forward around its own axis so as to move forward to press against the limiting portion 141, thereby positioning the limiting portion 141 so that the limiting portion 141 is not easily deflected backward. In other embodiments, the limiting member 14 can be changed to be only arranged on the outer side of the front end of the bent rod 13 or the outer side of the rear end of the support head 12.

[0024] See Figure 3 and Figure 4 The cross section of the hard support head 12 has four edges 121 and 122. Among the four edges 121 and 122, two opposite long edges 121 are collinear as the first group, and two opposite short edges 122 are collinear as the second group. The long edges 121 of the first group are perpendicular to the short edges 122 of the second group, forming a "cross" shape. When the operator inserts the hard support head 12 into the positioning hole, the two long edges 121 of the hard support head 12 can be perpendicular to the width direction of the alveolar bone and the two short edges 122 of the hard support head 12 can be parallel to the width direction of the alveolar bone. In this way, when the hard support head 12 pries the alveolar bone back and forth, the two short edges 122 of the hard support head 12 push the side wall of the alveolar bone outward along the width direction, while the two long edges 121 always press against the positioning hole wall for limiting, so as to prevent the hard support head 12 from deflecting. The connecting surface 123 between any two adjacent edges 121 and 122 is an inwardly concave surface, so when the hard support head 12 pries the alveolar bone back and forth, it is not easy to rub the wall of the positioning hole. Figure 3 , three scale marks 124 arranged at intervals in front and back are respectively provided on the two long edges 121 of the support head 12, so that the operator can align the rotation adjustment limiter 141, wherein: the distance from the front scale mark 124 to the front end of the support head 12 is 10mm; the distance from the middle scale mark 124 to the front end of the support head 12 is 12mm; the distance from the rear scale mark 124 to the front end of the support head 12 is 14mm. Not preferably, the cross section of the rigid support head 12 can be changed to have only two opposite edges, forming a "I" shape.

[0025] In this embodiment, the front end of the zigzag curved rod 13 is fixedly connected to the hard support head 12 and the rear end is fixedly connected to the handle 11, so that the front and rear axes of the hard support head 12 and the handle 11 are not collinear, which facilitates the hard support head 12 to be inserted into the oral cavity for operation. In a non-preferable embodiment, the curved rod 13 may not be provided, and the hard support head 12 may be directly welded to the handle 11, so that the front and rear axes of the hard support head 12 and the handle 11 are collinear.

[0026] The above is only an implementation method of the invention, and does not limit the scope of patent protection. Those skilled in the art can make non-substantial changes or substitutions based on the invention, which still fall within the scope of patent protection.

Claims

1. A minimally invasive bone spreader for dental implants, characterized in that: It comprises a handle, from the front end of which extends a support head for inserting into the alveolar bone, the front end of the support head is conical, the front part is small and the rear part is large, and the front-back axis of the support head is not colinear with the front-back axis of the handle.

2. The bone distractor according to claim 1, characterized in that: The front-rear axis of the support head is parallel to the front-rear axis of the handle.

3. The bone distractor according to claim 1, characterized in that: A bent rod is provided between the handle and the support head for connection.

4. The bone distractor according to claim 3, characterized in that: A limiting piece is provided for limiting the insertion depth of the support head, and the limiting piece can be positioned after adjusting the front and rear axial position relative to the support head.

5. The bone distractor according to claim 4, characterized in that: The limiting member is sleeved on the outside of the front end of the bending rod and / or the outside of the rear end of the supporting head in a threaded connection manner, and rotates forward and reversely around its own axis to achieve the front-rear axial position adjustment.

6. The bone distractor according to claim 5, characterized in that: The limiting component is divided into a front limiting portion and a rear anti-retreat portion, the limiting portion and the anti-retreat portion are respectively threadedly connected to the bending rod and / or the support head, the anti-retreat portion moves forward to press forward against the limiting portion to achieve the positioning; the support head is provided with a scale mark for the limiting portion to align.

7. The bone distractor according to any one of claims 1 to 6, characterized in that: The cross section of the support head has four edges, forming a "cross" shape, any two adjacent edges are perpendicular to each other and any two opposite edges are collinear.

8. The bone distractor according to claim 7, characterized in that: The four edges are divided into two groups, with two collinear edges forming one group. Among the two groups, one group is the long edges and the remaining group is the short edges.

9. The bone distractor according to claim 7, characterized in that: The connecting surface between any two adjacent edges is an inwardly concave surface.

10. The bone distractor according to claim 8, characterized in that: The connecting surface between any two adjacent edges is an inwardly concave surface.

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