Oral implant bone splitting chisel and use method

Abstract

The invention discloses an oral implant bone splitting chisel and a use method, the chisel comprises a holding part, a buffer area and a working head part which are distributed in a T-shaped structure; the holding part is a rod body and is provided with an anti-slip structure on the surface, and the axis is vertically and fixedly connected with the axis of the buffer area; the working head comprises a guide face and a guide blade, the splitting blade is of a wedge-shaped structure, a cutting edge is arc-shaped, arc-shaped transition faces are arranged on the two sides of the cutting edge, fillet transition is arranged at the tip end, the thickness of the cutting edge is gradually increased from the tip end to the root portion, and the holding portion and the buffer area are of an integral or detachable structure. The holding stability is improved through the T-shaped structure, bone tissue friction and damage are reduced through the design of the arc-shaped cutting edges and the round corners, the detachable working head can meet the requirements of different operation areas (a straight neck is used for an anterior tooth area, and a bent neck is used for a posterior tooth area), and multi-direction precise bone splitting is achieved; the use method is adaptive to different alveolar bone forms and bone cortex thicknesses, the operation steps are standard and controllable, the cleavage range is effectively controlled, the operation risk is reduced, the safety and convenience of the implant surgery are improved, and the device is suitable for various oral implant bone cleavage surgeries.

Description

Technical Field

[0001] This invention relates to the field of dental implant surgery medical device technology, specifically to a dental implant bone splitting chisel and its usage method. Background Technology

[0002] Inadequate alveolar bone width is a common clinical problem in oral implant surgery, requiring bone splitting techniques to expand the bone bed space to meet the implant fitting requirements. Current bone splitting chisels are mostly straight-bar or simple L-shaped structures, which have several technical drawbacks in clinical application: First, the force application direction is singular, only able to apply splitting force along the axial direction, making it difficult to achieve precise splitting in multiple directions, easily leading to bone fragmentation or uncontrolled splitting range, significantly increasing surgical risks; Second, the lack of a dedicated guiding blade and guiding surface makes slippage and deviation during surgery easy, seriously affecting operational accuracy, especially when dealing with complex bone morphologies, significantly increasing the operator's workload; Third, the splitting blade design is unreasonable, with the contact area with bone tissue either too large or too small. Too large a contact area easily leads to uneven force distribution on the bone tissue, while too small a contact area easily causes excessive damage to local bone tissue, both affecting postoperative bone healing.

[0003] Therefore, there is an urgent need in this field for a bone splitting chisel that can achieve precise multi-directional force application, stable grip, guided entry, and minimal damage to bone tissue, while also providing standardized usage methods adapted to different surgical scenarios, in order to address the aforementioned shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing bone splitting chisels, such as single force application, unstable grip, lack of guidance for entry, high risk of bone damage, and lack of standardized usage methods adapted to different surgical scenarios. This invention provides a bone splitting chisel for oral implantation and its usage method, which can achieve precise bone splitting in multiple directions, improve surgical safety and ease of operation, and adapt to the surgical needs of different alveolar bone morphology and cortical bone thickness.

[0005] A bone splitting chisel for oral implantation includes a grip, a buffer zone, and a working head. The working head and the buffer zone have a T-shaped cross-section. The grip is a rod-shaped structure with an anti-slip surface. The axis of the grip is perpendicular to and fixedly connected to the axis of the buffer zone. The working head includes a guide surface and a guide blade. The working head is connected to the buffer zone through a semi-circular expansion area. The splitting blade of the working head has a wedge-shaped structure and an arc-shaped cutting edge.

[0006] Furthermore, the gripping part is a cylindrical rod with a length of 110mm and a diameter of 4-6mm. The anti-slip structure is one or a combination of spiral patterns and anti-slip grooves, which improves the stability of the operator's grip and prevents slippage during surgery.

[0007] Furthermore, the buffer is a solid structure with a length of 9mm and a diameter of 4-6mm. Its cross-sectional shape is the same as that of the end cross-section of the working head, ensuring effective force transmission. The buffer and the working head are an integral structure.

[0008] Furthermore, the splitting blade has arc-shaped transition surfaces on both sides of the cutting edge, and a rounded corner transition at the tip. The thickness of the cutting edge gradually increases from the tip to the root, reducing frictional damage to bone tissue during splitting and preventing the sharp end from scratching bone or soft tissue. The guide surface is a tongue-shaped guide surface with a length of 10mm and a thickness of 0.5mm, providing precise guidance for the chisel entry and preventing operational deviation.

[0009] Furthermore, the gripping part and buffer zone are made of 316L medical stainless steel or titanium, and the working head is made of Ti6Al4V medical titanium alloy or 316L medical stainless steel. All parts are sterilized, meet the biocompatibility requirements of medical devices, and are corrosion-resistant, high-strength, and have a long service life.

[0010] Furthermore, the working end is a fixed or replaceable structure, and different specifications of working heads can be replaced according to the required splitting width and bone tissue hardness, thereby improving the versatility of the instrument.

[0011] A method for using a bone splitting chisel for oral implantation includes the following steps: S1. Preoperative assessment: Based on the patient's alveolar bone morphology, cortical bone thickness, and the required bone bed width for implant surgery, determine the bone splitting surgery plan and select the appropriate specifications for the working head, buffer zone, and gripping part as a whole. S2. Bone incision preparation: If the patient's labial cortex is thick, use an ultrasonic bone scalpel to make a T-shaped incision on the alveolar crest and buccal side, where the buccal incision is used as a guide expansion opening and the alveolar crest is used as the bone splitting entry point; if the patient's labial cortex is thin, use the alveolar crest directly as the bone splitting entry point, without the need for bone cutting on the buccal side. S3. Bone splitting procedure: Using T-shaped bone splitting chisels of increasing size (I, II, III, IV) in sequence, align the guide edge of the chisel with the bone splitting inlet. The operator holds the handle with both hands and slowly applies axial or lateral force according to the alveolar bone morphology. The chisel is guided into the inlet through the guide surface, gradually widening the alveolar bone until the required bone bed width for the implant surgery is achieved. Among them, the thickness of the guide edge of the labial bone chisel increases with the increasing size of the bone splitting chisel to achieve gradual widening of the alveolar bone and avoid bone fragmentation. S4. Postoperative care: After the bone splitting operation is completed, the chisel is removed from the mouth, and the grip, buffer zone and working head are cleaned and sterilized for easy reuse.

[0012] Compared with the prior art, the present invention has the following advantages: The bone splitting chisel of this invention adopts a T-shaped structure design, with the grip and buffer zone vertically and fixedly connected. The operator can hold it with both hands to apply force, which greatly improves the grip stability, avoids slippage and displacement during the operation, and reduces the difficulty of operation and the labor intensity of the operator. At the same time, the arc-shaped cutting edge and lingual guide surface design provide precise guidance for the chisel entry, realize multi-directional precise bone splitting, adapt to the surgical needs of different alveolar bone morphologies, effectively control the splitting range, and reduce the risk of bone tissue fragmentation.

[0013] The working end is a fixed or detachable and replaceable structure. Different specifications of splitting blades can be selected according to the required splitting width and bone tissue hardness, improving the versatility of the instrument. The arc-shaped cutting edge, arc-shaped transition surface and rounded corner design of the splitting blade minimize friction and damage to bone tissue, which is conducive to postoperative bone healing.

[0014] All components of the device are made of medical-grade stainless steel and titanium alloy, which are biocompatible, corrosion-resistant, and high-strength, meeting the standards for use in medical devices. They are also sterilized to meet the aseptic requirements of clinical surgery and have a long service life.

[0015] The accompanying method of this invention is designed with two bone incision preparation methods based on the thickness of the patient's labial bone cortex, adapting to different bone splitting surgical scenarios; at the same time, it uses bone splitting chisels of increasing size to gradually widen the alveolar bone, making the operation steps standardized and controllable, further reducing surgical risks, improving the accuracy of bone splitting operation, ensuring the overall effect of oral implant surgery, and is applicable to various types of oral implant bone splitting surgery. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the dental implant bone splitting chisel of the present invention; Figure 2 This is an enlarged view of the working head of the dental implant bone splitting chisel of the present invention; Figure 3 This is a progressively enlarged schematic diagram of the guide blade for cutting the bone splitting chisel used in the oral implantation of the present invention; Figure 4 This is an explanatory diagram of the working end and the curved gripping part of the oral implant bone splitting chisel of the present invention.

[0017] In the diagram: 1. Grip, 2. Buffer zone, 3. Working head, 4. Guide blade, 5, 6, 7. Guide blades of different specifications, 8. Semi-circular spreading area, 9, 10, 11. Arc-shaped structure of buccal spreading bone plate, 12. Lingual guide surface, 13, 14, 15. Lingual guide surfaces in different areas, 321. Cutting edge, I. T-type bone chisel I, II. T-type bone chisel II, III. T-type bone chisel III, IV. T-type bone chisel IV. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments are only used to explain the present invention and are not intended to limit the scope of protection of the present invention.

[0019] Example 1: As Figure 1-4 As shown, an oral implant bone splitting chisel includes a gripping part 1, a buffer zone 2, and a working head 3. The cross-section of the working head is T-shaped, with the height and width of the T being 4-6 mm and the height increasing gradually from 2.0 to 6.0 mm (for the anterior teeth region, a working end with a gradually increasing width (lingual guide surface) of 4.0 mm and a height (guide blade) of 2.0 mm-4.0 mm is used; for the posterior teeth region, a working end with a gradually increasing width (lingual guide surface) of 5.0-6.0 mm and a height (guide blade) of 2.0 mm-6.0 mm is used). The gripping part 1 is a solid cylindrical rod, 110mm long and 4-6mm in diameter. The surface of the rod has longitudinal anti-slip grooves. The axis of the straight-neck gripping part 1 is perpendicular to the axis of the buffer zone 2 and is welded and fixed or is an integral structure. It is suitable for splitting the thin bone plates in the anterior tooth area. The buffer zone 2 is a solid structure, 9mm long and 4-6mm in diameter. Its cross-sectional shape is the same as the end cross-sectional shape of the working head 3. The working head 3 includes a lingual guide surface 12 (including 13, 14, 15) and a guide blade 4 (including 5, 6, 7). The guide blade and the transition blade are integrally formed. The lingual guide surface 12 is 10mm long and 0.5mm thick. The working head 3 is welded and fixed to the buffer zone 2 through a semi-circular support area 8 or is an integral structure. The splitting blade of the working head 3 is a wedge-shaped structure. The cutting edge 321 is arc-shaped. There are arc-shaped transition surfaces on both sides of the cutting edge. The tip has a rounded transition. The thickness of the cutting edge gradually increases from the tip to the root.

[0020] In this embodiment, the gripping part 1 is made of 316L medical stainless steel, the buffer zone 2 and the working head 3 are made of Ti6Al4V medical titanium alloy, and all parts have undergone high temperature and high pressure sterilization treatment.

[0021] The above method of using a bone splitting chisel for dental implants is suitable for patients with thick labial cortical bone in the anterior region, and includes the following steps: S1. Preoperative assessment: The patient's alveolar bone morphology is examined by oral CT scan, the thickness of the bone cortex and the existing bone bed width are measured, the required bone bed width for implantation is determined, and the appropriate working head 3 is selected (in this embodiment, it is an integrated structure). S2. Bone incision preparation: A T-shaped incision is made on the alveolar crest and buccal side of the patient using an ultrasonic bone scalpel. The buccal incision serves as a guide expansion opening, while the alveolar crest serves as the bone splitting access point. S3. Bone splitting operation: Use T-shaped bone splitting chisels of size I, II, III, and IV in sequence. The thickness of the labial guide blade 4 of the four bone chisels increases in sequence. Align the guide blade 4 with the bone splitting inlet at the alveolar ridge crest. The operator holds the grip part 1 with both hands and slowly applies axial and lateral forces according to the alveolar bone morphology. Guide the chisel inlet through the lingual guide surface 12 to gradually widen the alveolar bone until the bone bed width required for the implantation surgery is reached. S4. Postoperative care: After the bone splitting operation is completed, the chisel is removed from the patient's mouth. The grip part 1, buffer zone 2 and working head 3 are thoroughly cleaned and sterilized under high temperature and high pressure to facilitate subsequent reuse.

[0022] Example 2: The structure of the oral implant bone splitting chisel in this example is basically the same as that in Example 1, except that the curved grip 1 is connected to the working end (2, 3) by welding. The working end (2, 3) and the entire curved grip can be replaced according to surgical needs. Figure 1-4 As shown, it is suitable for splitting thin bone plates in the posterior tooth region; the surface of the grip part 1 is provided with a combination of spiral texture and anti-slip grooves to form an anti-slip structure; the grip part 1 is made of 316L medical stainless steel, and the buffer zone 2 and the working head 3 are made of titanium.

[0023] The above method of using a bone splitting chisel for dental implants is suitable for patients with thin labial cortical bone in the posterior tooth region, and includes the following steps: S1. Preoperative assessment: The patient's alveolar bone morphology is examined by oral CT scan, the thickness of the labial cortical bone and the existing bone bed width are measured, the required bone bed width for implantation is determined, and the working head 3, buffer zone and curved grip portion are selected to match the split width. S2. Bone incision preparation: The patient's alveolar ridge crest is used directly as the bone splitting entry point, without the need for bone cutting on the buccal side; S3. Bone splitting operation: Use detachable T-shaped bone splitting chisels of type I, II, III, and IV in sequence. The thickness of the labial guide blade 4 of the four bone chisels increases in sequence. Align the guide blade 4 with the bone splitting inlet at the alveolar ridge crest. The operator holds the grip part 1 with both hands and slowly applies axial force. Guide the chisel inlet through the lingual guide surface 12 to gradually widen the alveolar bone until the bone bed width required for the implantation surgery is reached. S4. Postoperative care: After the bone splitting operation is completed, the chisel is removed from the patient's mouth. The grip part 1, buffer zone 2 and working head 3 are cleaned and sterilized by low-temperature plasma. After disinfection, they are sealed in a sterile bag for easy reuse in the future.

[0024] The dental implant bone splitting chisel of this invention has a reasonable structural design and is made of conventional medical instrument materials such as medical stainless steel and titanium alloy. It can be mass-produced using existing medical instrument processing technology. Its usage method is standardized and highly adaptable, and can be directly applied to various dental implant bone splitting surgeries in clinical practice. It effectively solves the problems of existing instruments such as single force application, unstable grip, and high risk of bone damage, thereby improving the safety and accuracy of the surgery. It has significant industrial practicality and clinical application value.

[0025] The scope of protection of this invention is determined by the claims. All equivalent transformations and improvements made based on the technical solutions of this invention fall within the scope of protection of this invention.

Claims

1. A bone splitting chisel for oral implantation, characterized in that, It includes a grip (1), a buffer zone (2) and a working head (3), which are arranged in a T-shape. The grip (1) is a rod structure with an anti-slip structure on its surface. The axis of the grip (1) is perpendicular to and fixedly connected to the axis of the buffer zone (2). The working head (3) includes a guide surface (12) and a guide blade (4). The working head (3) is connected to the buffer zone (2) through a semi-circular opening area (8). The splitting blade of the working head (3) is a wedge structure, and the cutting edge (321) of the splitting blade is arc-shaped.

2. The dental implant bone splitting chisel according to claim 1, characterized in that, The grip (1) is a cylindrical rod, and the anti-slip structure is one or a combination of spiral texture and anti-slip groove. The grip (1) is 110mm long and 5mm in diameter.

3. The dental implant bone splitting chisel according to claim 1, characterized in that, The buffer (2) is a solid structure, and its cross-sectional shape is the same as that of the end cross-section of the working head (3). The buffer (2) is 9mm long and 4-6mm in diameter. The buffer (2) and the working head (3) are an integral structure.

4. The dental implant bone splitting chisel according to claim 1, characterized in that, The splitting blade has arc-shaped transition surfaces on both sides of the cutting edge, and the tip of the splitting blade has a rounded transition. The thickness of the cutting edge gradually increases from the tip to the root. The guide surface (12) is a tongue-side guide surface with a length of 10 mm and a thickness of 0.5 mm.

5. The oral implant bone splitting chisel according to claim 1, characterized in that, The gripping part (1) and the buffer zone (2) are made of 316L medical stainless steel or titanium metal, and the working head (3) is made of Ti6Al4V medical titanium alloy or 316L medical stainless steel. All parts have been sterilized.

6. The dental implant bone splitting chisel according to claim 1, characterized in that, The working end (working head (3) + buffer (2)) is an integral structure, and different specifications of working ends (2, 3) can be selected according to the required splitting width and bone tissue hardness of the surgery.

7. A method of using the oral implant bone splitting chisel as described in any one of claims 1 and 6, characterized in that, Includes the following steps: S1. Preoperative assessment: Based on the patient's alveolar bone morphology, cortical bone thickness and the width of the bone bed required for implantation surgery, determine the bone splitting surgery plan and select the appropriate working end (2, 3) and gripping part (1). S2. Bone incision preparation: If the patient's labial cortex is thick, use an ultrasonic bone scalpel to make a T-shaped incision on the alveolar crest and buccal side, where the buccal incision is used as a guide expansion opening and the alveolar crest is used as the bone splitting entry point; if the patient's labial cortex is thin, use the alveolar crest directly as the bone splitting entry point, without the need for bone cutting on the buccal side. S3. Bone splitting operation: Use T-shaped bone splitting chisels of increasing size I, II, III and IV in sequence. Align the guide edge (4) of the chisel with the bone splitting inlet. The operator holds the grip part (1) with both hands and slowly applies axial or lateral force according to the alveolar bone morphology. Guide the chisel into the inlet through the guide surface (12) to gradually widen the alveolar bone until the bone bed width required for the implantation surgery is reached. S4. Postoperative care: After the bone splitting operation is completed, the chisel is removed from the mouth and the grip (1) and working end (2, 3) are cleaned and sterilized for easy reuse.

8. The method of use according to claim 7, characterized in that, In step S3, the thickness of the guide blade (4) of the labial bone chisels of the I, II, III and IV grade T-type bone splitting chisels increases sequentially to achieve gradual widening of the alveolar bone and avoid bone tissue fragmentation.

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