CN110405367A - A kind of magnetic field auxiliary femtosecond laser quick drill bone method - Google Patents
A kind of magnetic field auxiliary femtosecond laser quick drill bone method Download PDFInfo
- Publication number
- CN110405367A CN110405367A CN201910705978.0A CN201910705978A CN110405367A CN 110405367 A CN110405367 A CN 110405367A CN 201910705978 A CN201910705978 A CN 201910705978A CN 110405367 A CN110405367 A CN 110405367A
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- CN
- China
- Prior art keywords
- magnetic field
- bone
- laser
- femtosecond laser
- processing
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
Abstract
The present invention relates to a kind of magnetic fields to assist femtosecond laser quick drill bone method, belongs to laser precision machining technical field, specifically includes three steps: step 1, using the periosteum and cartilaginous tissue of scraper removal bone surface, exposes work surface；The magnetic field parameter of optimization is arranged in step 2, and after forming stabilizing magnetic field, sample to be processed is placed in magnetic field；Step 3, setting femtosecond laser processes preferred parameter, under the booster action of magnetic field, carries out fast laser processing to sample.In process, the plasma that laser and bone photo interaction generate is influenced by auxiliary magnetic field, magnetic field can be effectively reduced Plasma Shielding Effection intrinsic in femtosecond laser process, and then significantly improve the processing efficiency and working depth of laser drilling bone process.
Description
Technical field
The invention belongs to laser precision machining technical fields, are related to a kind of magnetic field auxiliary femtosecond laser quick drill brill bone side
Method.
Technical background
In clinical operation, fractures, Bones and joints displacement, tooth, which is crushed, waits the processing routine of hard bone tissues to generally use
The method of tradition machinery, such as electric drill, vibrating saw etc., contact when being handled with conventional method, due to cutter with material
Friction, causes heat largely to accumulate, and generates apparent thermal damage to surrounding tissue；Contact processing of the cutter with material easily causes
Bacterium infection；The bone scraps generated in treatment process can not be cleared up effectively, the above problem be unfavorable in art operation and it is postoperative more
It closes.
With the continuous development of laser technology, laser is developed application in clinical operation.With conventional mechanical method phase
Than laser surgey has noncontact processing, is accurately positioned processing, and processing bone chip is easy to handle, reduces infection and promotes postoperative extensive
Multiple advantage, the laser type currently used for sclerous tissues' processing includes Er:YAG laser, CO2 laser, ultrafast pulsed laser.
Representative of the Er:YAG and CO2 laser as Long Pulse LASER, the processing mechanism based on thermal ablation generate in process
Heat accumulation be easy to surrounding tissue generate thermal damage；Ultrafast pulsed laser such as picosecond laser, femtosecond laser, pulse period
Short, single pulse action time is much smaller than the propagation dissipation time of heat, therefore thermal accumlation is minimum, is not easy to generate heat waste to tissue
Wound.The dominant mechanism of femtosecond laser ablation be plasma ablation, when femtosecond laser irradiation/ablator surface, generate by
Electronics, ion and neutral particle composition plasma, plasma will cover Working position therewith, by absorption, reflection and
Scattering is to shield incident laser beam.Due to plasma formation and existing unstability, the laser energy for reaching tissue is aobvious
It writes and reduces, reduce the efficiency of process.
Domestic and international application includes: to improve cooling condition and optimization processing in the common method for improving laser drilling bone efficiency at present
Parameter.It is wherein cooling to generally use cooling compressed air, water flow cooling or combination cooling；The mode of optimization machined parameters has
Pulse energy is adjusted, repetition rate, modification scanning strategy etc. are changed.But add when needing to further increase in bone processing
When work efficiency rate and acquisition high-quality machined surface, traditional method has been unable to reach expected requirement.
Therefore, a kind of plasma plume that can regulate and control and generate in femtosecond laser and bone mechanism is invented, and can be had
Effect improves the new method that femtosecond laser bores the processing efficiency of bone, becomes urgent problem to be solved in clinical medicine.
Summary of the invention
To overcome the shortcomings of that existing laser drilling bone technology, the present invention are directed to clinical osseous surgery, propose that a kind of magnetic field auxiliary flies
Second laser quick drill bone method, sample is placed in stable magnetic field, the plasma of femtosecond laser and material interaction generation
In magnetic fields lower stress directed movement occurs for body, and plasma screen effect is weakened, and improves the processing efficiency of laser drilling bone
And processing stability.
In order to achieve the above objectives, technical scheme is as follows:
A kind of magnetic field auxiliary femtosecond laser quick drill bone method, comprising the following steps:
Step 1, after taking fresh bone removal bone surface connective tissue and periosteum, with being placed in physiology after distilled water flushing
It is spare in salt water；
Magnetic field generator parameter is set as needed in step 2, and after forming the stabilizing magnetic field of connection, sample to be processed is set
In wherein；
Sample and magnetic field are put on femtosecond laser system of processing workbench by step 3, determine the laser processing position for boring bone
It sets and technological parameter, adjusts focal plane position in real time in process, reach sample processing effect；
Wherein, fresh bone described in step 1 includes pig bone, and ox bone, sheep bone, people's bone etc., material size thickness is not
Limit；
Wherein, magnetic field parameter described in step 2 is coil turn 10-1000, exciting current 1A-20A, and frequency is
10Hz-10KHz；
Wherein, laser-processing system described in step 3 is femtosecond pulse system of processing, laser processing parameter are as follows:
Optical maser wavelength 400nm-2000nm, laser pulse width 10fs-5000fs, laser power 1W-100W, laser pulse frequency 10Hz-
10MHz；Strafe laser on the surface of the material by galvanometer, speed 1mm/s-5000mm/s, sweep span is
0.001-0.5mm, scanning times are 1-1000 times, and sample displacement platform movement velocity is 0-5000mm/s；
Wherein, laser drilling bone shape described in step 3 includes circle, rectangular, the concrete forms such as triangle.
The improvement technique of processing efficiency is improved relative to other, a kind of magnetic field of the present invention assists femtosecond laser quick drill bone side
Method, advantage include:
(1) femtosecond laser is bored bone technology and combined with externally-applied magnetic field by the present invention, can significantly improve processing efficiency with
The stability of process；
(2) present invention not only substantially reduces the thermal damage of bone surrounding tissue, but also processing quality can be improved, flawless, carbon
The problems such as change, generates；
(3) the method for the present invention operating process is simple, it is highly reliable, it can be achieved that all kinds of hard bone tissues working process, be easy to
Realize the large-scale application of clinical operation.
Detailed description of the invention
Fig. 1 is the flow chart that magnetic field assists femtosecond laser quick drill bone method；
Fig. 2 is the machining sketch chart that magnetic field assists femtosecond laser quick drill bone method；
Fig. 3 bores bone section light microscopic figure and scanning electron microscope surface topography map for no magnetic field femtosecond laser；
Fig. 4 is that magnetic field assists femtosecond laser to bore bone section light microscopic figure and scanning electron microscope surface topography map.
Each section title is as follows in Fig. 2:
1, femto-second laser；2, cooling water；3, processed sample；4, magnetic pole.
Specific embodiment
Content for a better understanding of the invention carries out technical solution of the present invention below in conjunction with the drawings and specific embodiments detailed
Thin to introduce, the given examples are served only to explain the present invention, is not intended to limit the scope of the present invention.
A kind of femtosecond laser brill bone method based on magnetic field auxiliary, includes the following steps:
Step 1, after taking fresh bone removal bone surface connective tissue and periosteum, with being placed in physiology after distilled water flushing
It is spare in salt water；
Magnetic field generator parameter is set as needed in step 2, and after forming the stabilizing magnetic field of connection, sample to be processed is set
In wherein；
Sample and magnetic field are put on femtosecond laser system of processing workbench by step 3, determine the laser processing position for boring bone
It sets and technological parameter, adjusts focal plane position in real time in process, reach sample processing effect.
Embodiment 1:
Step 1. takes fresh pig stick bone using cutter removal bone surface connective tissue and periosteum, clean with distilled water flushing
Afterwards, physiological saline is placed in save backup.
Pig bone sample is placed in magnetic field by the machining sketch chart of step 2. as shown in Figure 2, in the case where not starting magnetic field conditions, benefit
Femtosecond laser drilling is carried out with femtosecond laser and bores bone, and Experimental Characterization result is as shown in Figure 3；
Magnetic field parameter: electric current 5A, voltage 10V is arranged in step 3., and frequency 50Hz is started magnetic field, carried out using femtosecond laser
Bone is bored in femtosecond laser drilling, and Experimental Characterization result is as shown in Figure 4；
Step 4. is bored bone and is carried out on femtosecond laser system of processing workbench, laser processing parameter are as follows: laser power 15W,
Laser repetition rate 100kHz, beam scanning rate 150mm/s, setting scanning shape is round, and 30 μm of sweep span.
The above embodiment of the present invention is merely to illustrate examples of the invention, the reality being not intended to limit the present invention
Apply mode.It is all in spirit of that invention and principle, to made by the method for the present invention, step or condition it is any modification, improve etc.,
It all belongs to the scope of the present invention.
Claims (5)
1. a kind of magnetic field assists femtosecond laser quick drill bone method, which is characterized in that this method by femtosecond laser processing technology with
Externally-applied magnetic field combines, and specific implementation step is as follows:
Step 1, after taking fresh bone removal bone surface connective tissue and periosteum, with being placed in physiological saline after distilled water flushing
In it is spare；
Magnetic field generator parameter is set as needed in step 2, and after forming the stabilizing magnetic field of connection, sample to be processed is placed in it
In；
Sample and magnetic field are put on femtosecond laser system of processing workbench by step 3, determine bore bone laser machining site and
Technological parameter adjusts focal plane position in process in real time, reaches sample processing effect.
2. a kind of magnetic field according to claim 1 assists femtosecond laser quick drill bone method, which is characterized in that in step 1
The fresh bone includes pig bone, ox bone, sheep bone, people's bone etc., and material size thickness is unlimited.
3. a kind of magnetic field according to claim 1 assists femtosecond laser quick drill bone method, which is characterized in that step 2 institute
The magnetic field parameter stated is coil turn 10-1000, exciting current 1A-20A, frequency 10Hz-10KHz.
4. a kind of magnetic field according to claim 1 assists femtosecond laser quick drill bone method, which is characterized in that in step 3
The laser-processing system is femtosecond pulse system of processing, laser processing parameter are as follows: optical maser wavelength 400nm-2000nm,
Laser pulse width 10fs-5000fs, laser power 1W-100W, laser pulse frequency 10Hz-10MHz；Make laser in material by galvanometer
Material surface is strafed, speed 1mm/s-5000mm/s, sweep span 0.001-0.5mm, scanning times 1-1000
Secondary, sample displacement platform movement velocity is 0-5000mm/s.
5. a kind of magnetic field according to claim 1 assists femtosecond laser quick drill bone method, which is characterized in that step 3 institute
The laser drilling bone shape stated includes circle, rectangular, the concrete forms such as triangle.
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| CN201910705978.0A CN110405367A (en) | 2019-08-01 | 2019-08-01 | A kind of magnetic field auxiliary femtosecond laser quick drill bone method |
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| CN201910705978.0A CN110405367A (en) | 2019-08-01 | 2019-08-01 | A kind of magnetic field auxiliary femtosecond laser quick drill bone method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935593A (en) * | 2021-02-09 | 2021-06-11 | 北京工业大学 | Process method for ultraviolet picosecond laser focus-variable circular cutting in-vitro bone drill carbonization-free deep hole |
| CN113231751A (en) * | 2021-05-19 | 2021-08-10 | 北京航空航天大学杭州创新研究院 | Laser equipment for orthopedic surgery and use method |
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| US4267427A (en) * | 1977-12-27 | 1981-05-12 | Citizen Watch Co., Ltd. | Method of boring a hole through a magnet made of an intermetallic compound |
| TW201249582A (en) * | 2011-06-09 | 2012-12-16 | Univ Nat Yunlin Sci & Tech | Magnetic-field-assisted laser plasma device |
| CN103753028A (en) * | 2014-02-13 | 2014-04-30 | 温州大学 | Laser boring method and device assisted by electric field and magnetic field coupling |
| CN104043905A (en) * | 2014-06-09 | 2014-09-17 | 江苏大学 | Device for assisting in laser drilling with rotating electric field |
| CN108788497A (en) * | 2018-05-29 | 2018-11-13 | 江苏大学 | A kind of device of real-time monitoring energy field strength Laser microdrilling |
| CN109953826A (en) * | 2019-04-08 | 2019-07-02 | 北京航空航天大学 | A kind of laser aid and processing method for orthopaedics drilling |
-
2019
- 2019-08-01 CN CN201910705978.0A patent/CN110405367A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4267427A (en) * | 1977-12-27 | 1981-05-12 | Citizen Watch Co., Ltd. | Method of boring a hole through a magnet made of an intermetallic compound |
| TW201249582A (en) * | 2011-06-09 | 2012-12-16 | Univ Nat Yunlin Sci & Tech | Magnetic-field-assisted laser plasma device |
| CN103753028A (en) * | 2014-02-13 | 2014-04-30 | 温州大学 | Laser boring method and device assisted by electric field and magnetic field coupling |
| CN104043905A (en) * | 2014-06-09 | 2014-09-17 | 江苏大学 | Device for assisting in laser drilling with rotating electric field |
| CN108788497A (en) * | 2018-05-29 | 2018-11-13 | 江苏大学 | A kind of device of real-time monitoring energy field strength Laser microdrilling |
| CN109953826A (en) * | 2019-04-08 | 2019-07-02 | 北京航空航天大学 | A kind of laser aid and processing method for orthopaedics drilling |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935593A (en) * | 2021-02-09 | 2021-06-11 | 北京工业大学 | Process method for ultraviolet picosecond laser focus-variable circular cutting in-vitro bone drill carbonization-free deep hole |
| CN113231751A (en) * | 2021-05-19 | 2021-08-10 | 北京航空航天大学杭州创新研究院 | Laser equipment for orthopedic surgery and use method |
| CN113231751B (en) * | 2021-05-19 | 2022-09-23 | 北京航空航天大学杭州创新研究院 | Laser equipment for orthopedic surgery and use method |
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Application publication date: 20191105 |