CN1312055A - Flexible tubular titanium-nickel apparatus without deformation and its production process - Google Patents
Flexible tubular titanium-nickel apparatus without deformation and its production process Download PDFInfo
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- CN1312055A CN1312055A CN 00130007 CN00130007A CN1312055A CN 1312055 A CN1312055 A CN 1312055A CN 00130007 CN00130007 CN 00130007 CN 00130007 A CN00130007 A CN 00130007A CN 1312055 A CN1312055 A CN 1312055A
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- root canal
- canal file
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Abstract
The present invention relates to a root canal file for curing and diseases and its production process. Said invention adopts net-type medical titanium-nickel marmen material to improve structure of cutting edge, and its production process includes the steps of pretreating wire material, taper preparation and cutting edge forming treatment, flexibility treatment, cutting edge strengthening and wearability treatment and machine surface brightening treatment. Said machine can be freely bent with complex root canel system structure, in the course of treatment it has no deformation, and its operation is convenient, it can obtain good therapeutic effect, and its efficiency is high and its service life is long.
Description
The present invention relates to the root canal preparation apparatus that a kind of dental care is used, particularly relate to a kind of titanium nickel root canal file and production technology thereof.
The root canal of suffering from tooth is dental pulp disease and the most effective Therapeutic Method of periapical disease, by the root pipe is cleared up, shaping and filling, can solve infectious root canal tooth preservation problem.Root canal file is to be used in root pipe medial wall file finishing, makes it to be shaped or to pull out residual pulp in the root pipe, removes one of important root canal appliance of chip.Because suffering from dental caries that tooth took place, to decrease get involved degree, pulp cavity size, root pipe thickness, length of destructiveness, the tip of a root different with flexibility, make the structure more complicated of root canal system, the root canal preparatory instrument tends to bend with root pipe situation when treatment.
The root canal file that uses mostly is stainless steel material at present, stainless steel material its elastic strain amount when stressed is minimum, true plastic deformation usually takes place, apparatus self deforms when causing treating, thereby give the rotation of root canal file and lift and bring resistance, influence file finishing and enlarge effect, and through rupturing easily after the bending several times.If broken apparatus in the root pipe, is difficult to take out, bring extra misery to the patient.In addition, the cutting blade of rustless steel root canal file is not only sharp inadequately, and when carrying out the grinding of root pipe medial wall, wearability is relatively poor, polishes cutting blade easily, reduces stock removal rate, even can't use.
The root canal file of prior art has H type and K type.H type file is rounded, and sword meets at right angles with axle, K type file be one axially in the shape of a spiral the shape taper, the cross section is triangle or quadrate stock, along the stock of taper three or four spiral filing swords arranged.H type file only moves up and down Shi Caineng and carries out filing in the root pipe, but K type file is in direction of rotation with all filings when moving up and down.These root canal file pliabilities are low, produce bigger restoring force in crooked root tube, are easy to generate root pipe complication, and step, elbow root pipe, apical foramen of tooth open wide the skew of root pipe, sidewall perforation etc. in the RUGEN pipe.In crooked root tube, deformation easily takes place in the cutting edge of H type and K type file simultaneously, causes its effective area of cut to reduce.Chinese patent 87106306 is by adopting different taper design root canal files, replaces at that time passing through in the technology having the old-fashioned file of identical tapering, though structurally improve to some extent, but still can not tackle the problem at its root.
The purpose of this invention is to provide a kind of novel root canal preparatory instrument, make the complication system structure that it can good conformity root pipe, file finishing and enlarge root pipe medial wall is difficult for deforming and rupturing effectively, and the cutting blade of root canal file is sharp, and pliability, wearability are good.
The realization of the object of the invention is by the structure that adopts new material, change root canal file cutting edge and improves processing technique several respects and start with that existing division is as follows:
The material of root canal file provided by the invention adopts medical titanium nickel (TiNi) marmem, the composition scope of this alloy is: the percentage by weight of two kinds of elements of titanium nickel is between 40: 60～50: 50, the oxygen content of material is less than 500ppm, and phosphorus content is less than 700ppm, and hydrogen content is less than 500ppm.
Vertical section shape after its cutting edge of root canal file provided by the invention is shaped comprises rectangle, taper, rectangle+taper, swallow-tail form etc., and the filing sword is a helicon.
The processing and the processing method thereof of root canal file of the present invention are as follows:
1, silk material pretreatment
The silk material that cross section is comprised multiple shapes such as circle, triangle, rectangle utilizes wire drawing die to pursue drawing, and the sectional area scope of silk material is: circle silk diameter of section scope is 0.7mm～1.5mm, and triangle and rectangle silk sectional area scope are 0.1mm
2～1mm
2The drawing temperature is between 700 ℃-900 ℃, and drawing speed is controlled at below the 20m/min, and the per pass deflection is controlled within the 15%-25%, and the wire drawing die pass selects that round mould is arranged, three kinds of triangle mould and Fang Mo.Pulling to sectional area at 0.6mm-0.8mm (circle silk footpath), 0.30 * 0.30mm
2-0.40 * 0.40mm
2(rectangle), 0.08mm
2-0.20mm
2During (triangle) scope, reduce the drawing temperature and carry out cold-drawn to room temperature, drawing speed is controlled at below the 10m/min, and the per pass deflection is controlled within the 5%-10%, arrives the sectional area scope at 0.2mm up to cold-drawn
2-0.5mm
2(circle silk footpath), 0.10 * 0.10mm-0.28 * 0.28mm
2(rectangle), 0.01mm
2-0.08mm
2(triangle).
2, tapering preparation and cutting blade forming processes
Adopt silk roller machine that the silk of above-mentioned processing carry out roller system, processing method is with the processing screw is identical usually.Roller adopts alloy steel material, roller top is tapered, the length of awl is at 15-20mm, and tapering is 0.01-0.03, cuts out the trapezoidal cutting edge of helical form along the axis direction of roller, trapezoidal groove depth 0.1-0.2mm, wide 0.3-0.8mm adopts heating collar that the silk material is carried out preheating at the wire feed end of silk roller machine, and preheat temperature is between 600 ℃-800 ℃, wire feed rate is controlled between the 1m/min-3m/min, after the roller silk is finished the silk material is carried out segmentation.
Also can adopt grinding processing method, carry out segmentation with above-mentioned through pretreated silk material, every segment length 3cm adopts grinding machine that every section silk material is carried out surperficial spin finishing, grinds tapered carefully bar-shaped.Tapering is 0.02, promptly along silk material long axis direction, and the every increase of length 1mm, diameter increases 0.02mm.
Silk material through the tapering preparation is carried out machining, and making its cutting edge vertical section is rectangle, taper, rectangle+taper, swallow-tail form etc., and the filing sword is the required form of helicon.
3, handling flexibly
Above-mentioned silk material is after the distortion of roller system, and quality is more crisp, and fracture need be carried out handling flexibly easily.Method is to heat 10 minutes to 60 minutes in heating furnace, and temperature is at 400 ℃～500 ℃, and temperature retention time was taken out in air then and cooled off at 5～100 minutes.
4, cutting blade is strengthened and the wearability processing
Through after the above-mentioned processing, whole apparatus has all obtained good flexibility.Partly carry out local strengthening at cutting blade, so that cutting edge partly obtains enough intensity and wearability.
5, handle is handled and reinforced to surface-brightening
Utilizing the cloth wheel to add antiscuffing paste handles carrying out surface-brightening through the silk material after the above-mentioned processing.
Injection process: reinforce plastic handle in the end of silk material.Handle is cylindrical,
Root canal file of the present invention can be with the structure free bend of complicated root canal system, no true deformation is introduced in endodontic procedure, can recover straight fully after the taking-up, residual pulp efficient height in the cutting root pipe, simultaneously its cutting edge part can more effectively have been given play to its filing and repair function when straight under case of bending, be convenient to that the doctor lifts and rotating operation, alleviate cleaning and finishing root needed time of pipe and workload, reduce the chance that causes root pipe complication.This root canal file cutting effect is good simultaneously, efficient is high, repeatedly uses and does not rupture, and cutting blade is not easy wearing and tearing, and the surface is not easy to get rusty when disinfecting, long service life.
The following drawings further provides the concrete structure of root canal file of the present invention.
This accompanying drawing is the front view and the longitudinal sectional drawing of root canal file cutting edge.Wherein Fig. 1 is the front view of rectangle+taper cutting edge, and Fig. 2 is the longitudinal sectional drawing of Fig. 1, and Fig. 3 is the front view of swallow-tail form cutting edge, and Fig. 4 is the longitudinal sectional drawing of Fig. 3.
Embodiment
1, silk material pretreatment
With diameter is that the circle silk of 1.5mm utilizes wire drawing die to pursue drawing, and the wire drawing die pass selects that round mould is arranged, three kinds of triangle mould and Fang Mo.
| Embodiment | Hot drawing | Cold-drawn | ||||||
| Temperature (℃) | Speed (m/min) | Per pass deflection (%) | The wire drawing die pass | Sectional area size (mm 2) | Speed (m/min) | Per pass deflection (%) | Sectional area size (mm 2) | |
| 1 | ?700 | ????10 | ????15 | Circular | ????0.6 | ????7 | ????7 | π×(0.2) 2 |
| 2 | ?820 | ????15 | ????17 | Circular | ????0.7 | ????8 | ????9 | π×(0.2) 2 |
| 3 | ?850 | ????15 | ????19 | Rectangle | 0.3×0.3 | ????8 | ????5 | ?0.1×0.2 |
| 4 | ?890 | ????19 | ????25 | Rectangle | 0.3×0.4 | ????9 | ????6 | ?0.2×0.28 |
| 5 | ?780 | ????18 | ????22 | Triangle | ????0.15 | ????7 | ????7 | ????0.06 |
2, tapering preparation and cutting blade forming processes
Adopt silk roller machine that the silk material of above-mentioned processing carry out roller system, adopt heating collar that the silk material is carried out preheating at the wire feed end of silk roller machine, after the roller silk is finished, make root canal file cutting edge vertical section become rectangle+taper, the filing sword is a helicon.Carry out segmentation with shears.
| Embodiment | Preheat temperature (℃) | Wire feed rate (m/min) |
| ????6 | ????680 | ????1 |
| ????7 | ????720 | ????2.5 |
| ????8 | ????800 | ????2 |
Adopt numerically controlled lathe that the silk material of above-mentioned processing is carried out machining, the first step cuts the helical form rectangular recess, changes lathe tool, and second step is the one-sided triangular groove that cuts along the helical groove edge, make root canal file cutting edge vertical section become swallow-tail form, the filing sword is a helicon.
3, handling flexibly
The silk material that above-mentioned cutting blade is shaped adopts the box resistance-heated furnace of vacuum to carry out handling flexibly, cools off with the air cooling mode then.
| Embodiment | Heating-up temperature (℃) | Heat time heating time (min) |
| ????9 | ????450 | ????10 |
| ????10 | ????510 | ????30 |
| ????11 | ????400 | ????60 |
4, cutting blade Strengthening and Toughening and wearability are handled
Adopt sandblasting machine, cutting blade is carried out local strengthening with schmigel and quartz sand.The diameter of sand grains is about 0.5mm, and the sandblast time is 1 hour.
5, handle is handled and reinforced to surface-brightening
Devices use cloth after above-mentioned processing wheel is added antiscuffing paste carry out the surface-brightening processing, antiscuffing paste adopts white fused alumina, and granularity is 0.5 μ m-3 μ m.
Reinforce plastic handle with the thermoplastic machine in the end of silk material, handle is cylindrical, for anti-skidding, anti-skidding rib is arranged on the handle.
The root canal file of above-mentioned preparation has following effect: its maximal bending moment was low 5-6 times than the stainless steel root canal file of prior art when (1) crooked 45 was spent. (2) the maximum deflection angle all is higher than ISO3630 specified standard angle, and does not show the permanent deformation angle. (3) moment of flexure is low, and pliability is high, and the load that imposes on the tough section of cutting in crooked root tube greatly reduces, and has reduced the pressure of apparatus. (4) in resin simulation root pipe and its cleaning shaping root pipe ability of Isolated Tooth test. The result shows that it does not cause the root pipe choking,
And preparation root pipe is quick, non-cracking or distortion, and root pipe global shape is all better after the preparation, demonstrates preferably fluency
And tapering. The surface is not easy to get rusty when (5) disinfecting.
Wherein rectangle+taper cutting edge so that root canal file to insert root Guan Shigeng easy, and cutting edge only had the structure of taper to double more originally during because of cutting, stock-removing efficiency increases, short rectangle platform has improved service life so that cutting blade is more wear-resisting.
Root canal file with swallow-tail form cutting edge, when carrying out the cleaning of root pipe and being shaped, the swallow-tail form cutting edge sticks up with the warp architecture of root canal file, in rotation with lift in the process very effectively filing and enlarge the root inside pipe wall, and through after the handling flexibly, its pliability of described root canal file and torsion fracture resistant are good, have reduced corresponding complication thereby reduced restoring force when endodontic treatment of curved root canals.
Claims (8)
1, a kind of root canal file that is used to clear up and repair dental pulp, the material that it is characterized in that this root canal file adopts medical titanium nickel shape memory alloy (TiNi), the composition scope of material is: the percentage by weight of two kinds of elements of titanium nickel is between 40: 60～50: 50 scopes, the oxygen content of material is less than 500ppm, phosphorus content is less than 700ppm, and hydrogen content is less than 500ppm; The vertical section shape of described its cutting edge of root canal file comprises rectangle, taper, rectangle+taper, swallow-tail form, and the filing sword is a helicon.
2, the production technology of the described root canal file of claim 1, the production that it is characterized in that this root canal file is through pretreatment, the tapering preparation and cutting blade forming processes, handling flexibly of silk rolling material hot drawing in conjunction with the later stage cold-drawn.
3, the production technology of the described root canal file of claim 2, the pretreatment of wherein said silk material is that cross section is comprised that circle, triangle, orthogonal silk material utilize wire drawing die to pursue drawing, with circle mould, triangle mould or rectangular mold combined method, wherein hot drawing temperature is at 700 ℃～900 ℃, the per pass deflection pulls out speed below 20m/min 15%～25%; Cold-drawn is at room temperature carried out, and the per pass deflection pulls out speed below 10m/min 5%～10%.
4, the production technology of the described root canal file of claim 2, wherein said tapering preparation is to adopt silk roller machine carry out roller system with the cutting blade forming processes, or employing grinding processing method, to carry out surperficial spin finishing through pretreated silk material, grind tapered carefully bar-shapedly, then the silk material through tapering preparation is carried out machining.
5, the production technology of the described root canal file of claim 4, wherein said roller system is to adopt the alloy steel rider, roller top is tapered, and the length of awl is at 15-20mm, and tapering is 0.010.03, axis direction along roller cuts out the trapezoidal cutting edge of helical form, trapezoidal groove depth 0.1-0.2mm, wide 0.3-0.8mm adopts heating collar that the silk material is carried out preheating at the wire feed end of silk roller machine, preheat temperature is between 600 ℃-800 ℃, and wire feed rate is controlled between the 1m/min-3m/min.
6, the production technology of the described root canal file of claim 4, wherein said machining are that the first step cuts rectangular channel earlier, and second step cut leg-of-mutton skewed slot again along the track of rectangular channel, and twice cutting is combined into swallow-tail form.
7, the production technology of the described root canal file of claim 2, wherein said handling flexibly is to heat in heating furnace 10 minutes to 60 minutes through the silk material of tapering preparation with the cutting blade forming processes, temperature is at 400 ℃～500 ℃, and temperature retention time is taken out after 5～100 minutes and cooled off in air.
8, the production technology of the described root canal file of claim 2, it is characterized in that this technology also comprises the cutting blade of root canal file strengthened handles with wearability and light processing is carried out on the root canal file surface, it is to adopt sandblasting machine that wherein said Strengthening and Toughening and wearability are handled, and with schmigel and quartz sand cutting blade is carried out local strengthening; It is to utilize the cloth wheel to add antiscuffing paste to carry out that surface-brightening is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00130007 CN1312055A (en) | 2000-10-23 | 2000-10-23 | Flexible tubular titanium-nickel apparatus without deformation and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00130007 CN1312055A (en) | 2000-10-23 | 2000-10-23 | Flexible tubular titanium-nickel apparatus without deformation and its production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1312055A true CN1312055A (en) | 2001-09-12 |
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ID=4593905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00130007 Pending CN1312055A (en) | 2000-10-23 | 2000-10-23 | Flexible tubular titanium-nickel apparatus without deformation and its production process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260552B (en) * | 2008-04-23 | 2010-06-09 | 哈尔滨工程大学 | Surface reproducing method for root canal appliance |
| CN102743233A (en) * | 2012-07-24 | 2012-10-24 | 哈尔滨工程大学 | Ultra-fine grained nickel-titanium alloy root canal file and preparation method thereof |
| CN108788644A (en) * | 2018-06-21 | 2018-11-13 | 深圳市葆丰医疗器械有限公司 | A kind of preparation method of the flexible root canal file of Nitinol |
| CN110497163A (en) * | 2019-09-26 | 2019-11-26 | 江苏盛玛特新材料科技有限公司 | A kind of lamination combined type root canal file and its processing technology |
| CN111715826A (en) * | 2019-03-22 | 2020-09-29 | 白李生物科技有限公司 | Method for improving ductility of endodontic treatment needle and method for manufacturing the needle |
-
2000
- 2000-10-23 CN CN 00130007 patent/CN1312055A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260552B (en) * | 2008-04-23 | 2010-06-09 | 哈尔滨工程大学 | Surface reproducing method for root canal appliance |
| CN102743233A (en) * | 2012-07-24 | 2012-10-24 | 哈尔滨工程大学 | Ultra-fine grained nickel-titanium alloy root canal file and preparation method thereof |
| WO2014015767A1 (en) * | 2012-07-24 | 2014-01-30 | 哈尔滨工程大学 | Ultra-fine grain nickel-titanium alloy root canal file and preparation method therefor |
| CN108788644A (en) * | 2018-06-21 | 2018-11-13 | 深圳市葆丰医疗器械有限公司 | A kind of preparation method of the flexible root canal file of Nitinol |
| CN111715826A (en) * | 2019-03-22 | 2020-09-29 | 白李生物科技有限公司 | Method for improving ductility of endodontic treatment needle and method for manufacturing the needle |
| CN111715826B (en) * | 2019-03-22 | 2022-05-03 | 白李生物科技有限公司 | Method for improving ductility of endodontic treatment needle and method for manufacturing the needle |
| CN110497163A (en) * | 2019-09-26 | 2019-11-26 | 江苏盛玛特新材料科技有限公司 | A kind of lamination combined type root canal file and its processing technology |
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