CN219109635U - Bone chisel for mandibular branch sagittal bone cleavage - Google Patents
Bone chisel for mandibular branch sagittal bone cleavage Download PDFInfo
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- CN219109635U CN219109635U CN202223368082.4U CN202223368082U CN219109635U CN 219109635 U CN219109635 U CN 219109635U CN 202223368082 U CN202223368082 U CN 202223368082U CN 219109635 U CN219109635 U CN 219109635U
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Abstract
The utility model provides an osteotome for sagittal bone cleavage of mandible branch, which comprises a chisel handle and a working end, wherein the working end is in a downward protruding arc shape, the working end comprises arc-shaped rounded edges which are positioned at two sides and are in transitional connection with the tail end of the chisel handle, namely, working end arc-shaped blunt transition areas, the working end also comprises chisel edges positioned between the working end arc-shaped blunt transition areas at two sides, the thickness of the working end is uniformly thinned from the working end arc-shaped blunt transition areas at two sides to the chisel edge in the middle, the thickness of the chisel handle is uniformly thinned from the top end of the chisel handle to the tail end of the chisel handle, the thickness of the working end is uniformly thinned from top to bottom, and the overall height of the working end along the length direction of the chisel handle is the same as the width of the chisel handle; the osteotome can slide along the arc-shaped blunt transition area of the working end after the nerve vascular bundle of the lower dental socket contacts with the arc-shaped blunt transition area of the working end in the bone cleavage process, so that the risk that the nerve vascular bundle is directly broken and torn can be greatly reduced, and the direct damage of the nerve vascular bundle is reduced.
Description
Technical Field
The utility model belongs to the field of medical equipment, relates to an osteotome for mandibular branch sagittal bone cleavage, and in particular relates to a special osteotome for preventing injury of a nerve vessel bundle of a lower dental socket in mandibular branch sagittal bone cleavage.
Background
Mandibular branch sagittal splitting is one of the most commonly used orthognathic techniques for treating osseous malocclusions. Because of the advantages of simple operation, wide indication, strong flexibility and the like, the method is widely applied to the treatment of poor facial morphology caused by abnormal mandibular development. Inferior alveolar neurovascular bundle injury is one of the most common complications in mandibular branch sagittal dissection. The lower alveolar nerve vascular bundle contains the lower alveolar nerve and the lower alveolar artery. The nerve injury of the lower tooth socket directly leads to the numbness of the lower lip and chin after operation and sensory disturbance. The lower alveolar artery often causes obvious bleeding in the operation after injury, so that the operation time is prolonged, and the risks of postoperative swelling, infection and the like are increased. The lower alveolar nerve vascular bundle enters the mandible from the mandibular hole inside the mandible branch and runs from the back to the front on the mandible body. In a sagittal osteotomy of a mandible, an osteotome is commonly used to cleave the mandible and mandibular body in the sagittal direction. In this process, the conventional osteotome cannot effectively avoid nerves when cleaving bone tissue due to morphological and design defects. The chisel edge of the traditional horizontal osteotome directly damages the nerve vascular bundles of the lower dental alveoli to cause the nerve damage of the lower dental alveoli, which is the main reason for causing sensory disturbance of the lower lip and chin. Related researches show that the nerve injury caused by osteotome in mandibular branch sagittal bone cleavage directly increases the incidence rate of postoperative sensory disturbance of patients and prolongs the recovery time, and the incidence rate of the postoperative alveolar nerve dysfunction is 54% -100% immediately after operation. The probability of damage to the nerve vascular bundles of the lower dental alveoli can be reduced by using the bone separator or the ultrasonic bone knife in the operation, but the bone separator increases the risk of accidental fracture, and the ultrasonic bone knife greatly prolongs the operation time and cannot completely replace an osteotome. At present, most of traditional osteotome edges clinically used for sagittal bone cleavage of mandible are horizontal double-slope edge surfaces, so that lower alveolar nerves cannot be well avoided in the bone cleavage process, and the lower alveolar nerve vascular bundles are easily broken. Development of an osteotome having a function of avoiding nerve bundles of the lower alveoli, capable of preventing nerve and blood vessel injuries, is an urgent need for orthognathic surgery.
Disclosure of Invention
The utility model aims to provide an osteotome for sagittal bone cleavage of mandibular branches, which can effectively reduce damage to the nerve vascular bundles of the lower dental alveoli.
The technical scheme of the utility model is as follows:
the utility model provides an osteotome for lower jaw sagittal bone cleavage, including chisel handle and with chisel handle end integrated into one piece's working end that meets, the working end is downward convex arc, the working end is including being located both sides and with chisel handle end transitional phase's curved blunt edge, working end arc blunt transition zone promptly, the working end is still including being located the chisel sword between the working end arc blunt transition zone of both sides, the thickness of working end is evenly thinned to the chisel sword in middle part by the working end arc blunt transition zone of both sides, chisel handle's thickness is evenly thinned to chisel handle end by chisel handle top, the thickness of working end is evenly thinned from top to bottom, the whole height of working end along chisel handle's length direction is the same with chisel handle's width.
The further technical scheme comprises the following steps:
the working end is uniformly bent.
The thickness of the top end of the chisel handle is 5mm, the length of the chisel handle, namely the distance between the top end of the chisel handle and the end of the chisel handle is 20cm, the width of the chisel handle is 5-30 mm, and the thickness of the end of the chisel handle is 2-3 mm.
The arc length of the chisel edge is 1/6-2/3 of the integral arc length of the working end, and the thickness of the chisel edge is 0.01-2 mm.
The included angle between the central axis of the chisel edge and the extension line of the central axis of the chisel handle is smaller than 30 degrees.
Among four vertical planes of the chisel handle, two adjacent planes form a round corner transition.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides an osteotome for sagittal bone cleavage of a mandible, which is designed in such a way that the width of the working end of the osteotome is far greater than the width of the chisel edge, and the working end except the chisel edge is a rounded arc-shaped transition edge, namely an arc-shaped blunt transition area of the working end positioned at two sides of the chisel edge. In the bone cleavage process, after the lower alveolar nerve vascular bundle contacts with the working end arc blunt transition area except the chisel edge, the lower alveolar nerve vascular bundle can slide along the working end arc blunt transition area of the working end, so that the risk that the nerve vascular bundle is directly cut off and torn can be greatly reduced, and the nerve vascular bundle is directly damaged. When the chisel edge is a blunt edge of 1-2 mm, the osteotome mainly plays a role in bone distraction, is mainly used for expanding the cheek and tongue sides of the mandible after bone cleavage, and forms a near telecentric bone segment on the basis of well protecting a vascular nerve bundle.
Drawings
The utility model is further described below with reference to the accompanying drawings:
fig. 1 is a front view of an osteotome for sagittal bone cleavage of a mandible provided by the present utility model.
Fig. 2 is a side view of an osteotome for sagittal bone cleavage of a mandible provided by the present utility model.
Fig. 3 is a side view of an osteotome for sagittal bone cleavage of a mandible with a curved working end provided by the present utility model.
Fig. 4 is a schematic view showing a working end of an osteotome for sagittal bone cleavage of a mandible according to the present utility model.
Fig. 5 is a schematic view of the chisel edge and working end arcuate blunt transition of the present utility model.
Fig. 6 is a schematic view of a chisel handle and chisel handle tip according to the utility model.
In the figure: 1. chisel handle, 2, working end, 3, chisel edge, 4, arc blunt transition zone of working end, 5, chisel handle end, 6, chisel handle top.
Detailed Description
The utility model is described in detail below with reference to the attached drawing figures:
the utility model provides an osteotome for sagittal bone cleavage of mandible branch, which comprises a chisel handle 1 and an integrally formed working end 2 connected with the end 5 of the chisel handle, as shown in figures 1, 2, 4, 5 and 6, wherein the working end 2 is in a downward protruding arc shape, the working end 2 comprises arc-shaped rounded edges which are positioned at two sides and are in transitional connection with the end 5 of the chisel handle, namely a working end arc-shaped blunt transition zone 4, the thickness of the working end arc-shaped blunt transition zones 4 at two sides is uniformly thinned from two sides to the middle part of the working end 2 so as to form an arc-shaped chisel edge 3 positioned at the middle part of the working end 2, the thickness of the chisel handle 1 is uniformly thinned from the top 6 of the chisel handle to the end 5 of the chisel handle, the thickness of the working end 2 is uniformly thinned from top to bottom, and the overall height of the working end 2 along the length direction of the chisel handle 1 is the same as the width of the chisel handle 1. The overall height of the working end 2 along the length of the shank 1 is referred to as the vertical height between the midpoint (i.e. the lowest point) of the chisel edge 3 of the working end 2 to the junction of the working end 2 and the shank end 5.
As shown in fig. 3, the working end 2 may also be uniformly curved.
As shown in fig. 6, among the four vertical planes of the chisel handle 1, two adjacent planes form a rounded transition, so that the operator is prevented from being injured.
The utility model is further described in connection with several specific embodiments.
Example 1:
the present embodiment provides an osteotome for sagittal bone cleavage of a mandible, as shown in fig. 1, 2, 4 and 6, which is generally straight chisel (as shown in fig. 1 and 2). The chisel handle 1 has a length of 20cm and a width of 30mm. The thickness of the chisel handle top 6 is 5mm, the thickness of the chisel handle tail 5 is 3mm, and the overall height of the arc-shaped working end 2 along the length direction of the chisel handle 1 is 30mm. The thickness of the chisel edge 3 is 0.1mm, and the arc length of the arc of the chisel edge 3 is 10mm. The arc-shaped blunt transition zone 4 of the working end gradually becomes thicker towards two sides at the chisel edge 3 until the arc-shaped blunt transition zone is in transition connection with the osteotome tail end 5 (as shown in fig. 4). The chisel handle 1 and the chisel working end 2 are cast integrally, and the material is stainless steel.
Example 2:
the osteotome for sagittal bone cleavage of mandibular branch provided in this embodiment is a straight chisel (as shown in fig. 1 and 2) as shown in fig. 1, 2, 4 and 6. The chisel handle 1 has a length of 20cm and a width of 5mm. The thickness of the chisel handle top 6 is 5mm, the thickness of the chisel handle tail 5 is 2mm, and the overall height of the arc-shaped working end 2 along the length direction of the chisel handle 1 is 5mm. The thickness of the chisel edge 3 is 0.1mm, and the arc length of the arc of the chisel edge 3 is 2mm. The arc-shaped blunt transition zone 4 of the working end gradually becomes thicker towards two sides at the chisel edge 3 until the arc-shaped blunt transition zone is in transition connection with the osteotome tail end 5 (as shown in fig. 4). The chisel handle 1 and the working end 2 are integrally cast, and the material is stainless steel.
Example 3:
the osteotome for sagittal bone cleavage of mandibular branch provided in this embodiment is a straight chisel (as shown in fig. 1 and 2) as shown in fig. 1, 2, 5 and 6. The chisel handle 1 has a length of 20cm and a width of 20mm. The thickness of the chisel handle top 6 is 5mm, the thickness of the chisel handle tail end 5 is 2mm, the overall height of the arc-shaped working end 2 along the length direction of the chisel handle 1 is 20mm, the thickness of the chisel edge 3 is 1mm, and the arc length of the arc of the chisel edge 3 is 10mm. The arc-shaped blunt transition zone 4 of the working end gradually becomes thicker towards two sides at the chisel edge 3 until the arc-shaped blunt transition zone is in transition connection with the osteotome tail end 5 (as shown in fig. 4). The chisel handle 1 and the chisel working end 2 are cast integrally, and the material is stainless steel.
Example 4:
the osteotome for sagittal bone cleavage of mandibular branch provided in this embodiment, as shown in fig. 3, is a curved chisel as a whole, and the length of the chisel handle 1 is 20cm and the width is 10mm. The thickness of the chisel handle top 6 is 5mm, the thickness of the chisel handle tail 5 is 2mm, and the overall height of the arc-shaped working end 2 along the length direction of the chisel handle 1 is 10mm. The thickness of the chisel edge 3 is 0.1mm, and the arc length of the arc of the chisel edge 3 is 3mm. The arc-shaped blunt transition zone 4 of the working end gradually moves to two sides and becomes thick on the chisel edge 3 until the arc-shaped blunt transition zone is in transition connection with the end 5 of the osteotome. The working end 2 is uniformly bent in an arc shape from the lowest point of the chisel edge 3 to a position 10mm above the lowest point of the chisel edge 3, so that an included angle between the extension line of the central axis of the chisel handle 1 and the extension line of the central axis of the chisel edge 3 is 30 degrees. The chisel handle 1 and the working end 2 are integrally cast, and the material is stainless steel.
Example 5:
the embodiment provides an osteotome for sagittal bone cleavage of a mandible branch, as shown in fig. 3, which is a curved chisel as a whole. The chisel handle 1 has a length of 20cm and a width of 20mm. The thickness of the chisel handle top 6 is 5mm, the thickness of the chisel handle tail 5 is 2mm, and the overall height of the arc-shaped working end 2 along the length direction of the chisel handle 1 is 20mm. The thickness of the chisel edge 3 is 1mm, and the arc length of the arc of the chisel edge 3 is 5mm. The arc-shaped blunt transition zone 4 of the working end gradually moves to two sides and becomes thick on the chisel edge 3 until the arc-shaped blunt transition zone is in transition connection with the end 5 of the osteotome. The working end 2 is uniformly bent in an arc shape from the lowest point of the chisel edge 3 to a position 20mm above the lowest point of the chisel edge 3, so that an included angle between an extension line of the central axis of the chisel handle 1 and the central axis of the osteotome 2 is 20 degrees. The chisel handle 1 and the chisel working end 2 are cast integrally, and the material is stainless steel.
The utility model provides a using method of an osteotome for mandibular branch sagittal bone cleavage, which comprises the following steps:
the method comprises the steps of cutting a mandible mucosa according to the design of a conventional mandible sagittal bone cleavage, separating and exposing the front edge of the mandible and the adhesive periosteum of the cheek side of a first molar of the mandible, separating and exposing the inner side of the mandible and the lower tongue below the periosteum of the inner side of the mandible, and applying the mandible to re-saw a horizontal osteotomy on the inner side of the mandible above the lower tongue, and a sagittal osteotomy on the front edge of the mandible and a vertical osteotomy on the cheek side of the first molar of the mandible. The osteotome for the sagittal bone cleavage of the mandible branch provided by the utility model is used for cleaving the mandible branch along the sagittal bone cleavage line. It is the process of the most vulnerable to damage of the nerve vascular bundles of the lower alveoli when the osteotome enters the cancellous bone of the mandible. In use of the present utility model, bone tissue is cleaved and distracted using working end 2. When the operation experience is insufficient or the anatomical morphology of the mandible is changed, even if the osteotome touches the nerve vascular bundles in the process of chiseling bone, the probability that the nerve touches the arc-shaped blunt transition area 4 of the working end is increased because the chisel edge 3 occupies a small width of the whole osteotome, and the nerve can slide across the osteotome along the arc edge of the arc-shaped blunt transition area 4 of the working end, so that the direct damage or fracture of the nerve vascular bundles of the lower dental alveolus caused by the osteotome is avoided.
Claims (6)
1. The utility model provides an osteotome for lower jaw sagittal bone cleavage, including chisel handle (1) and with chisel handle end (5) integrated into one piece's working end (2), a serial communication port, working end (2) are the arc of downward bulge, working end (2) are including being located both sides and with chisel handle end (5) transitional phase's curved blunt edge, working end arc blunt transition district (4), working end (2) still include be located between working end arc blunt transition district (4) of both sides chisel edge (3), the thickness of working end (2) is evenly thinned by chisel handle top (6) to chisel edge (3) at middle part of both sides working end arc blunt transition district (4), the thickness of chisel handle (1) is evenly thinned by chisel handle end (5), the thickness of working end (2) is evenly thinned from top to bottom, the whole height of working end (2) along the length direction of chisel handle (1) is the same with the width of chisel handle (1).
2. An osteotome for sagittal bone cleavage of the mandible according to claim 1, wherein the working end (2) is uniformly curved.
3. An osteotome for sagittal bone cleavage of the mandible according to claim 1 or 2, characterized in that the thickness of the chisel shank tip (6) is 5mm, the length of the chisel shank (1), i.e. the distance between the chisel shank tip (6) and the chisel shank tip (5), is 20cm, the width of the chisel shank (1) is 5-30 mm, the thickness of the chisel shank tip (5) is 2-3 mm.
4. An osteotome for sagittal bone cleavage of the mandible according to claim 3, characterized in that the arc length of the chisel edge (3) is 1/6-2/3 of the overall arc length of the working end (2), the thickness of the chisel edge (3) being 0.01-2 mm.
5. An osteotome for sagittal bone cleavage of the mandible according to claim 2, characterized in that the angle between the centre axis of the chisel edge (3) and the extension of the centre axis of the chisel handle (1) is less than 30 °.
6. An osteotome for sagittal bone cleavage of the mandible according to claim 1, characterized in that of the four vertical planes of the chisel handle (1), two adjacent planes are rounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223368082.4U CN219109635U (en) | 2022-12-14 | 2022-12-14 | Bone chisel for mandibular branch sagittal bone cleavage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223368082.4U CN219109635U (en) | 2022-12-14 | 2022-12-14 | Bone chisel for mandibular branch sagittal bone cleavage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219109635U true CN219109635U (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223368082.4U Active CN219109635U (en) | 2022-12-14 | 2022-12-14 | Bone chisel for mandibular branch sagittal bone cleavage |
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| Country | Link |
|---|---|
| CN (1) | CN219109635U (en) |
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- 2022-12-14 CN CN202223368082.4U patent/CN219109635U/en active Active
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