CN113967052A - Medical micro-drilling instrument with positive rake angle micro-edge helical texture - Google Patents
Medical micro-drilling instrument with positive rake angle micro-edge helical texture Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 61
- 238000005520 cutting process Methods 0.000 claims abstract description 49
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 44
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 18
- 239000010432 diamond Substances 0.000 claims abstract description 18
- 239000002826 coolant Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 5
- 239000010935 stainless steel Substances 0.000 claims abstract description 5
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- 208000003618 Intervertebral Disc Displacement Diseases 0.000 description 1
- 206010050296 Intervertebral disc protrusion Diseases 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/1615—Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/1622—Drill handpieces
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/1644—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans using fluid other than turbine drive fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/1662—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans for particular parts of the body
- A61B17/1671—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans for particular parts of the body for the spine
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/1644—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans using fluid other than turbine drive fluid
- A61B2017/1651—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans using fluid other than turbine drive fluid for cooling
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- Life Sciences & Earth Sciences (AREA)
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- Orthopedic Medicine & Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
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- Heart & Thoracic Surgery (AREA)
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Abstract
The invention discloses a medical abrasive drilling instrument with a positive rake angle and a micro-blade spiral texture, which comprises a stainless steel cutter bar and a PCD polycrystalline diamond abrasive drill bit welded on the cutter bar; the surface characteristics of the diamond grinding drill bit comprise a positive rake angle micro blade, a spiral chip groove formed by spirally and orderly arranging the micro blade, six micro cutting blades at the bottom of the grinding drill bit and an arc chip groove. Compared with the traditional negative rake angle grinding, the positive rake angle micro blade participates in grinding, the positive pressure is obviously reduced, and the problem that the adhesive bone fragments are embedded on the surface of the grinding drill bit and are not easy to fall off is effectively solved; the six micro cutting edges at the bottom of the grinding drill reduce cutting force and improve processing efficiency during hole processing; the spiral chip removal groove and the arc chip removal groove cooperate to form an effective chip removal path, so that the chip removal efficiency of the abrasive drilling is obviously improved; the chip removal system is beneficial to the circulating flow of a cooling medium in the chip removal groove, the cooling heat exchange efficiency is enhanced, the heat dissipation and chip removal capacity of the grinding drill is effectively improved, and the grinding temperature is reduced.
Description
Technical Field
The invention relates to a medical micro abrasive drilling instrument, in particular to a medical micro abrasive drilling instrument with a positive rake angle and a micro blade spiral texture.
Technical Field
With the improvement of social economy and medical level, a high-efficiency, low-damage and accurate treatment scheme is sought, and the method is an important civil engineering which meets the requirement of people on the beauty of high-quality life. However, due to the fact that the life style of sub-health work and the aging society are intensified, the spine diseases such as intervertebral disc protrusion, intervertebral disc stenosis and hyperosteogeny published by the world health organization become one of the ten worldwide intractable diseases affecting the high-quality life of people. Under the endoscope, a miniature grinding drill and other orthopedic instruments are used, and the removal of diseased bone tissues at the nerve compression position is one of the best treatment schemes for severe rehabilitation of spinal diseases. The currently most widely used electroplated diamond grinding drill (with the diameter of 0.5-7 mm) has the advantages of easiness in operation, thorough removal of pathological tissues and the like, but the grinding drill grinds at a negative rake angle and generates overlarge positive pressure so that bone chips with adhesiveness are easily embedded on the surface of the grinding drill and are not easy to fall off; the abrasive particles are randomly distributed, and the chip containing space is narrow; the drill hole is in a semi-closed environment and lacks a chip removal groove, so that bone chips are easy to block in the hole and are difficult to discharge, and a large amount of heat is generated during grinding of the traditional diamond abrasive drill, so that the temperature is sharply increased. Since bone tissue is a bioactive material and has low thermal conductivity, irreversible thermal damage to bone tissue occurs if the grinding temperature is higher than 47 ℃ for more than one minute, higher than 55 ℃ for more than half a minute, and the temperature is higher than 70 ℃. The temperature of the ground bone can reach 200 ℃ after the traditional electroplated diamond grinding, and the temperature seriously exceeds the temperature of the thermal injury of bone tissues. In addition, the abrasive grains on the surface of the electroplated diamond abrasive drill are easy to fall off during grinding, and the fallen diamond grains are embedded into bone tissues to cause sequelae such as postoperative pain and the like, thereby causing secondary injury.
In order to solve the problem of thermal injury of bone tissues caused by overhigh grinding temperature, the patent of ' CN208065229U ' publication No. for medical micro bone grinding tool with orderly arranged abrasive particles ' welds diamond abrasive particles on a tool bit substrate by adopting a brazing technology, so that the diamond abrasive particles on the surface of a micro abrasive drill are orderly arranged, for example: horizontal arrangement, oblique arrangement and spiral arrangement. The ordered arrangement of the abrasive particles can form a regular chip removal groove, so that the chip containing space on the surface of the grinding drill bit is enlarged, the blocking phenomenon of bone chips in grinding is relieved, and the heat generated in grinding in an operation is reduced. However, the technical scheme still has the following problems: the abrasive particles of the tool are cut in a negative rake angle mode to generate larger positive pressure, and the positive pressure is too large, so that the bone chips which are originally adhesive are easily embedded on the surface of the abrasive drill bit and are difficult to fall off, the abrasive drill is easily rubbed, peripheral nerve tissues are accidentally injured, and paralysis of a patient is caused. When drilling, the bottom of the abrasive drill head is in a semi-closed environment, the chip removal grooves formed by orderly arrangement are not easy to discharge bone chips adhered to the surface of the abrasive drill, and the bone chips are accumulated in narrow drill holes, so that the temperature is sharply increased, and the thermal injury of bone tissues is caused.
The patent 'compound grinding drill bit' with the publication number 'CN 207840232' provides a compound grinding drill bit capable of effectively controlling the size and the direction of a drilled hole. The composite abrasive drill bit comprises an abrasive drill bit body and a hole saw, wherein the abrasive drill bit body is provided with a plurality of cutting edges, the hole saw is welded on the abrasive drill bit body, and the hole saw and the abrasive drill bit body have the same rotation axis. The grinding drill bit body is used for preliminary punching, and the hole saw is used for compensating the irregular phenomenon of the grinding drill bit during drilling, so that the size and the direction of the drilling can be effectively controlled. However, the technical scheme still has the following problems: the composite grinding drill bit is only limited to hole machining of bone tissues, plane grinding cannot be performed, multiple tool changing is needed in the operation process, and the operation time is prolonged. The cutting edge of the abrasive drill bit is too sharp, the cutting efficiency is high, but the precision of removing the pathological tissue is difficult to guarantee, peripheral soft tissue and nerves are easily accidentally injured by the sharp cutting edge in the operation process, and secondary injury is caused.
Disclosure of Invention
In order to effectively solve the problems in the prior art, the invention provides a medical miniature abrasive drilling instrument with a positive rake angle and a micro-blade spiral texture, which is used for reducing the grinding temperature and improving the grinding efficiency. The main characteristic of the structure is that the micro blades with positive rake angles in spiral arrangement are processed on the surface of the abrasive drill in 5-10 degrees. The cutting force, especially the positive pressure, can be obviously reduced by cutting at the positive rake angle during the abrasive drilling process. The reduction of the positive pressure effectively inhibits the phenomenon that bone fragments are adhered and embedded on the surface of the abrasive drill bit; six micro cutting edges are formed at the bottom of the grinding drill bit, and the grinding drill bit is similar to a micro drill bit structure, so that the cutting force of a drill hole can be reduced during hole machining, and the machining efficiency is improved; six arc chip removal grooves which are distributed along the circumference are designed at the bottom of the abrasive drilling head, so that the chip containing space on the surface of the abrasive drilling head is increased, and meanwhile, an ordered chip removal path is formed with the spiral grooves which are spirally distributed with the micro blades, so that the chip removal efficiency of the abrasive drilling is obviously improved, the grinding temperature is reduced, and the grinding efficiency is improved.
In order to realize the purpose, the medical micro abrasive drilling instrument with the positive rake angle and the micro-blade spiral texture is characterized in that: the abrasive drill comprises a cutter bar and an abrasive drill head, wherein the abrasive drill head is made of PCD polycrystalline diamond materials, and the diameter of the abrasive drill head is phi 4 mm. The abrasive drilling head is welded on a cutter bar made of stainless steel material, and the diameter of the cutter bar is phi 2.5 mm; micro blades which are spirally and orderly arranged are formed on the abrasive drilling head, and micro grinding units with positive rake angles are processed on the micro blades, so that the micro blades are in cutting with the positive rake angles during plane grinding, compared with the traditional cutting with the negative rake angles, the positive pressure is obviously reduced, and the problem of bone chip adhesion embedding on the surface of the abrasive drilling can be effectively solved; the spiral texture arrangement of the micro blades can form a regular spiral chip groove on the surface of the abrasive drill, so that the chip containing space is increased; arc chip grooves and six micro cutting edges which are circumferentially distributed are formed at the bottom of the abrasive drill bit to form a micro drill bit structure, so that the working efficiency of the abrasive drill is greatly improved when the abrasive drill performs drilling; spiral chip groove and arc chip groove synergism are showing and are improving chip removal efficiency. Meanwhile, the chip removal system is beneficial to the circulation flow of a cooling medium, the cooling and heat exchange effects are enhanced, and the heat damage of the grinding drill to bone tissues is reduced.
The length and width of the micro blade are 100-150 mu m, the height of the blade is 50-100 mu m, the front angle of the micro blade is 5-10 degrees, and the rear angle is 5-10 degrees. The cutting edge of each micro-blade is perpendicular to the direction of the abrasive drilling cutting speed.
The spiral arrangement pitch of the micro blades is 20mm, the number of the spiral grooves is 20-25, the width of each spiral groove is 100-300 mu m, and the vertical distance between the micro blades is 100-120 mu m.
The width of the arc chip removal groove at the bottom of the abrasive drilling head is 300-500 mu m, the depth of the arc chip removal groove is 100-150 mu m, and the arc chip removal groove is screwed to the radius of the abrasive drilling from the bottom of the abrasive drilling.
The length of the miniature cutting edge at the bottom of the abrasive drilling head is 200-250 mu m, and the width of the section of the front cutter face of the abrasive drilling is 100-150 mu m.
Compared with the prior art, the invention has the following beneficial effects.
The problem of bone chip adhesion and embedding on the surface of the abrasive drill bit is effectively solved. Because the protein in the bone fragments has adhesiveness, the traditional electroplated diamond grinding drill adopts negative rake angle cutting, and the excessive positive pressure is generated to easily enable the bone fragments to be adhered and embedded on the surface of the grinding drill head. And positive rake angle micro-edges are formed on the surface of the grinding drill bit, so that the micro-edges are in positive rake angle cutting during plane grinding, and compared with the traditional negative rake angle cutting, the positive pressure is obviously reduced. The problem of the surperficial bone bits of abrasive drilling head adhere to inlay is effectively solved, and goes out the sword height and the electroplating diamond abrasive drilling unanimous, can not damage the soft tissue because the abrasive drilling head is too sharp.
The heat dissipation and chip removal capability of the abrasive drill is effectively improved. The abrasive particles on the surface of the traditional electroplated diamond grinding drill bit are randomly distributed, the chip containing space is narrow, and bone chips are blocked on the surface of the grinding drill bit during processing and are not easy to discharge. The micro blades at the positive rake angle are spirally arranged to form a spiral chip removal groove, and the arc chip removal groove is designed at the bottom of the grinding drill bit, so that the chip removal efficiency during grinding is obviously improved under the synergistic effect of the two. In addition, the chip removal system of the grinding drill bit is beneficial to the circulating flow of the cooling medium in the chip removal groove, the cooling heat exchange effect is enhanced, and the cooling efficiency of the cooling medium is improved.
And the machining efficiency of the abrasive drill is greatly improved. When the common electroplated diamond abrasive drill is used for machining a hole, the negative rake angle abrasive particles remove materials in a semi-closed environment, the generated grinding force is large, the temperature is high, the abrasive drill efficiency is low, the operation time is prolonged, and the heat accumulation is caused. When the positive rake angle micro-edge abrasive drilling is used for hole machining, the positive rake angle is adopted for cutting, and lower cutting force and temperature are generated. And simultaneously grinding the bottom of the drill to form six cutting edges. When the abrasive drilling is rotated at a high speed, the cutting edge contacts with bone tissues firstly, high-speed drilling is carried out, when certain drilling depth is reached, the micro-edge at the positive rake angle participates in cutting, and compared with the traditional abrasive drilling, the machining efficiency is obviously improved.
Fourthly, the abrasive particles can not fall off, and the safety is high. The diamond abrasive particles on the common abrasive drill adopt an electroplating process, and when the abrasive drill works, the abrasive particles are easy to fall off and embedded into bone tissues, so that the sequelae of the operation are caused. The positive rake micro-cutter grinding drill bit is made of PCD polycrystalline diamond materials, and is processed by laser removal materials to form micro blades and chip grooves on the surface of a grinding drill, so that the micro blades are not easy to fall off, and the safety of the materials is guaranteed.
Drawings
FIG. 1 is a front view of the medical burr and burr grinding device with positive rake micro-blade spiral texture according to the present invention.
Fig. 2 is a bottom view and a partial enlarged view of the medical abrasive drilling device with the positive rake angle micro-blade spiral texture.
Fig. 3 is a schematic perspective view and a partial enlarged view of the medical burr grinding device with the positive rake angle micro-blade spiral texture.
The labels in fig. 1 to 3 are: 1. the tool comprises a tool bar, 2, a grinding drill, 21, a micro blade, 211, a micro blade front tool face, 212, a micro blade cutting edge, 213, a micro blade rear tool face, 22, a spiral chip groove, 23, a grinding drill bottom, 231, an arc chip groove, 232 and a micro cutting edge.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the specific examples.
Referring to fig. 1 to 3, the medical abrasive drilling device with the positive rake angle and the micro-blade spiral texture is divided into a cutter bar and an abrasive drilling head, wherein the cutter bar is made of stainless steel and has a diameter of phi 2.5mm, the abrasive drilling head is made of PCD polycrystalline diamond and has a diameter of phi 4mm, and the abrasive drilling head is welded on the stainless steel cutter bar. The abrasive drilling head structure comprises a positive rake angle micro blade, a chip removal groove formed by spiral arrangement, a micro cutting blade at the bottom of the abrasive drilling head and an arc chip removal groove.
And (3) cutting the surface of the abrasive drill bit by adopting laser to process spirally and orderly arranged micro blades, wherein the length and the width of each micro blade are both 100-150 mu m, and the height of each blade is 50-100 mu m. And machining a front angle and a rear angle on the micro blade, wherein the front angle and the rear angle of the micro blade are 5-10 degrees. The cutting edge formed by the front clearance angle is vertical to the direction of the abrasive drilling speed. When the grinding drill grinds the plane, the micro blade with the positive rake angle cuts into the bone tissue, thereby reducing the cutting force of the micro blade, reducing the positive grinding pressure and relieving the phenomenon that bone chips are embedded and adhered to the surface of the grinding drill due to the large pressure of the negative rake angle.
The pitch formed by spirally arranging the micro blades is 20mm, the number of the spiral grooves is 25, the width of each spiral groove is 100-300 mu m, and the vertical distance between the micro blades is 100-120 mu m; when the plane with a certain angle is formed between the axis of the grinding drill cutter rod and the cutting plane for grinding bone tissues, generated bone chips can be discharged through the spiral groove formed by the micro-blades, so that the chip removal efficiency is improved, and the grinding temperature is obviously reduced.
Six micro cutting edges (the length is 200-250 mu m) are processed at the bottom of the abrasive drill head, and an arc chip removal groove (the width is 300-500 mu m) similar to a drill tip is designed at the same time and extends from the bottom of the abrasive drill head to the radius of the abrasive drill head. When the abrasive drilling is adopted for drilling, the six cutting edges firstly contact bone tissues to perform high-speed drilling, bone chips generated by drilling in a semi-closed environment are discharged from the chip grooves, and a smaller cutting force is generated compared with a common grinding head, so that the phenomena that the bone chips on the surface of the abrasive drilling are adhered and embedded and the grinding head is blocked by the bone chips are inhibited, and the cutting efficiency is ensured. When a certain drilling depth is reached, the micro blades at the positive rake angle participate in cutting, and bone chips flow out of the chip removal grooves formed by spirally arranging the micro blades, so that the accumulation of the bone chips is avoided during grinding, the grinding force is reduced, the grinding temperature is reduced, and the thermal damage of bone tissue processing is avoided.
The chip removal grooves formed by spirally arranging the micro blades and the arc-shaped chip removal grooves at the bottom of the grinding drill bit act synergistically to form a chip removal system on the whole grinding drill bit during machining. Meanwhile, when cooling medium is adopted for cooling, the chip removal system can influence the action effect of a flow field, accelerate the circulating flow of the cooling medium, strengthen the cooling heat exchange efficiency, effectively improve the heat dissipation and chip removal capacity of the grinding drill bit, and avoid the problems of the blockage of the grinding drill bit, the thermal damage of bone tissues and the like.
The above-described embodiments are only specific examples for further explaining the object, technical solution and advantageous effects of the present invention in detail, and the present invention is not limited thereto. All equivalents, modifications, etc. that come within the scope of the disclosure are to be embraced therein.
Claims (6)
1. The medical miniature abrasive drilling instrument with the positive rake angle and the micro-blade spiral texture is characterized in that: the abrasive drill comprises a cutter bar (1) and an abrasive drill head (2), wherein the abrasive drill head (2) is a PCD polycrystalline diamond material and has a diameter of phi 4mm, the abrasive drill head (2) is welded on the cutter bar (1) made of a stainless steel material, and the diameter of the cutter bar (1) is phi 2.5 mm; micro blades (21) which are spirally arranged are processed on the grinding drill bit (2), positive rake angles, back angles and cutting edges are formed on the micro blades (21), the micro blades (21) are in cutting at the positive rake angles during plane grinding, compared with the traditional cutting at the negative rake angles, the positive pressure is remarkably reduced, and the problem of bone chip adhesion embedding on the surface of the grinding drill can be effectively solved; arc-shaped chip grooves (231) which are circumferentially arranged are formed at the bottom (23) of the abrasive drill bit, six micro cutting edges (232) are arranged at the bottom (23) of the abrasive drill bit to form a structure similar to the micro drill bit, and the work efficiency of the abrasive drill is greatly improved when the abrasive drill carries out hole machining; the spiral texture of little sword (21) is arranged and is formed regular spiral chip groove (22) on the abrasive drilling head surface, forms abrasive drilling head surface chip removal system with arc chip groove (231) the synergism of abrasive drilling head bottom (23), improves the chip removal efficiency, and chip removal system helps coolant's circulation flow simultaneously, strengthens cooling heat transfer effect, reduces the abrasive drilling to the thermal damage of bone tissue.
2. The medical micro burr and burr grinding device with positive rake angle and micro-blade spiral texture of claim 1, wherein: the length and width of the micro blade (21) are 100-150 mu m, the edge-extending height is 50-100 mu m, a micro blade front blade surface (211) and a micro blade rear blade surface (213) are processed to form a micro grinding unit with a positive rake angle, the rake angle of the micro blade (21) is 5-10 degrees, the rear angle is 5-10 degrees, and the micro blade (21) with the positive rake angle can reduce the positive pressure of the grinding drill to inhibit the bone chip mosaic phenomenon.
3. The medical micro burr and burr grinding device with positive rake angle and micro-blade spiral texture of claim 1, wherein: the spiral arrangement pitch of the micro blades (21) is 20mm, the number of the spiral chip removal grooves (22) is 20-25, the width of each spiral chip removal groove (22) is 100-300 mu m, the upper and lower intervals of the micro blades (21) are 100-120 mu m, and the spiral chip removal grooves (22) formed by the micro blades (21) which are arranged in order increase chip containing space on the surface of a grinding drill and improve chip removal efficiency of the grinding drill.
4. The medical micro burr and burr grinding device with positive rake angle and micro-blade spiral texture of claim 1, wherein: the cutting edge (212) of each micro blade (21) is perpendicular to the cutting speed direction, so that the cutting edge (212) of each micro blade (21) can work fully, and the grinding efficiency of the abrasive drilling is improved.
5. The medical micro burr and burr grinding device with positive rake angle and micro-blade spiral texture of claim 1, wherein: the width of arc chip groove (231) is 300 ~ 500 mu m, and the degree of depth is 100 ~ 150 mu m, and arc chip groove (231) are by the brill bottom spiral to brill radius, improve the chip removal efficiency of brill, reduce the heat damage of brill to the bone tissue.
6. The medical micro burr and burr grinding device with positive rake angle and micro-blade spiral texture of claim 1, wherein: the length of a micro cutting edge (232) at the bottom (23) of the abrasive drilling head is 200-250 microns, the section width of a front tool face of the abrasive drilling is 100-150 microns, a front angle of the micro drilling head is processed into a positive front angle, the angle is 10-15 degrees, the positive front angle abrasive drilling generates lower cutting force and temperature during hole processing, the micro cutting edge (232) contacts bone tissues firstly during high-speed drilling of the abrasive drilling, and after a certain drilling depth is reached, the positive front angle micro cutting edge (21) participates in cutting, so that the working efficiency of the abrasive drilling is greatly improved.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111187846.7A CN113967052A (en) | 2021-10-12 | 2021-10-12 | Medical micro-drilling instrument with positive rake angle micro-edge helical texture |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111187846.7A CN113967052A (en) | 2021-10-12 | 2021-10-12 | Medical micro-drilling instrument with positive rake angle micro-edge helical texture |
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| CN113967052A true CN113967052A (en) | 2022-01-25 |
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| CN202111187846.7A Pending CN113967052A (en) | 2021-10-12 | 2021-10-12 | Medical micro-drilling instrument with positive rake angle micro-edge helical texture |
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| US6764490B1 (en) * | 1999-11-08 | 2004-07-20 | Muller Erich Johann | Surgical treatment tool for creating a recess in a cartilage and/or bone tissue for a joint prosthesis |
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| CN212973018U (en) * | 2020-04-30 | 2021-04-16 | 重庆西山科技股份有限公司 | Medical reciprocating grinding head and medical grinding cutter |
| CN213665553U (en) * | 2020-09-28 | 2021-07-13 | 北京市春立正达医疗器械股份有限公司 | Acetabular bone file |
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| US20090048602A1 (en) * | 2007-08-15 | 2009-02-19 | O'donoghue Denis | Surgical bur with unequally spaced flutes, flutes with different rake angles and flutes with alternating reliefs |
| US20120191098A1 (en) * | 2011-01-21 | 2012-07-26 | Greatbatch Ltd. | Disposable Surgical Hemispherical Cutter For Convex Surfaces |
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