CN87205896U - Dental position fixing screw - Google Patents
Dental position fixing screw Download PDFInfo
- Publication number
- CN87205896U CN87205896U CN 87205896 CN87205896U CN87205896U CN 87205896 U CN87205896 U CN 87205896U CN 87205896 CN87205896 CN 87205896 CN 87205896 U CN87205896 U CN 87205896U CN 87205896 U CN87205896 U CN 87205896U
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- tooth
- retention pin
- thread
- utility
- screw thread
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Abstract
The utility model discloses a dental position fixing screw using the austenitic stainless steel type steel as the material and made by bruising wire and passivation. The surface is the ceramic material containing chromium oxides, so the corrosion resistance and the biocompatibility are good. The bidirectional bony screw thread tooth forms (8, 9) designed in equal strength according to the type of steel and the dentin strength has favorable retention effect. The two circular ring diameters of an anti-thrust closed section (4) are greater than or equal to the outside diameter of thread, so the dentin notch is closed effectively. The diameter and the length of the thread are confirmed according to different patient dentin parameters to suit the tooth restoration. The utility model has the advantages of reasonable structure, convenient operation, low cost, easy popularization and good curative effect.
Description
This utility model is a kind of improvement of curing odontopathy filling, fixing device.
Cure at present the reparation of multiple dental defect such as undesirable root, residual crown, serious corner cut be damaged, bring into use tooth with the self tapping screw thread retention pin of autotomying in recent years, because this retention pin is embedded in the human body for a long time, therefore, except that requiring sufficient intensity, toughness and suitable elastic modelling quantity, more importantly should have performances such as good anti-corrosion and biocompatibility on the material; Structurally steering capability is good except that having required, the tapping resistance is little, self tapping is autotomyed, more importantly should have maintenance firmly and threaded notch characteristics such as seal voluntarily.
The tooth of clinical use now is with the autotomy material of screw thread retention pin of self tapping, as the En 58J steel alloy that is adopted among the UK Patent Application GB-2052666, the oo Cr 18Ni 13Mo 3 Ultra-low carbon medical stainless steels that adopted in China Xi'an wind and thunder instrucment and meter plant patent application 85 2 02741, generally acknowledge that general austenitic stainless steel surface is upper state (activated state), its electrode potential is usually less than 0.2 volt, and is lower than people bulk potential.Both potential differences cause tissue is produced zest simplified reaction (being that biocompatibility is poor) and retention pin corrosion resistance variation, for improving corrosion resistance and biocompatibility, U.S.'s retention pin that international corporation (Whaledent Interna-tional Company) produces that pauses the Wal, be on rustless steel retention pin surface, to plate with gold, the gold electrode current potential is 1.6～1.7 volts, so that it weakens with potential difference between human body, and increase that it is ornamental.Present known retention pin structure, its screw thread mostly adopt triangle thread (as the pause retention pin of international corporation of U.S. Wal), and this kind screw thread production technology is comparatively simple, but every button dentine volume of its dentine nut is little, maintenance power and to bear masticatory force low; China Xi'an wind and thunder instrucment and meter plant adopts unidirectional corner saw profile of tooth screw thread, and it is lowered again oppositely bearing masticatory force, and two kinds of screw threads all have the loosening easily shortcoming that causes the retention effect difference.In addition, pause the Wal retention pin of international corporation of the U.S., the thrust step in its screw thread stage casing is the garden cylindricality, and external diameter equals major diameter of thread, can not adopt and frustrate a method production, the production rate is low; The retention pin that China Xi'an wind and thunder instrucment and meter plant produces, though can be with frustrating a method production, the step external diameter is less than major diameter of thread.There is the shortcoming that thrust capacity is relatively poor and threaded notch can not be sealed voluntarily.
Task of the present utility model is: the tooth of making at type of stainless steel carries out material and handles with the self tapping screw thread retention pin surface of autotomying, to improve biocompatibility and corrosion resistance.Structurally for adapting to different patient's treatments, its diameter of thread and length are determined by patient's dentine parameter; Change thread tooth to improve the retention effect after treating; Change the closed section profile to reach the dentine threaded notch and seal voluntarily and to improve the production rate.
Make tooth with autotomy screw thread retention pin and improve biocompatibility, corrosion resistance of self tapping for enlarging type of stainless steel, this utility model is electrochemical passivation to be carried out on the retention pin surface handle, make its surface generate skim pottery chromium-containing oxide, activated state becomes passive state, its electrode potential can be brought up to 1.2～1.6 volts, thereby reduce it with the potential difference between human body, biocompatibility and corrosion resistance improve.According to " biomaterial scientific and engineering " (Biomaterials Scienceand Engineering.Joon Bu Park.1984 Plenum Press New York) book chapter 1, chapter 7 introduction such as, biocompatibility not only depends on the material surface electrode potential, he also depends on the material surface chemical stability, material has and does not discharge ion, the toxicity of material, the material surface hydrophilic is relevant with factors such as other hot propertys, amid all these factors, according to " biomaterial introduction " (Biomaterials an introduction.Joon Bu Park.1979 Plenum Press New York) the 139th page of introduction of a book, pottery chromium-containing oxide biocompatibility is better than gold.
Structurally, this utility model is made following several respects and improved: for being suitable for different patient's treatments, preferred through stripped tooth test, the diameter of thread is to be advisable less than patient's dentine thickness 1/3～1/4, and reach (or is stung to obtain 10～15 kilograms of maintenance power
Power) and less than Dentinal effective depth be advisable, this series is 1.5～3.0 millimeters (total length is 2.0～6.5 millimeters); For improving retention effect, with reference to the unidirectional bone thread of Fig. 3 orthopaedics, this spiral shell tooth adopts two-way bone thread profile of tooth, the high metal threaded tooth size of intensity is reduced, and the low dentine nut volume of strength ratio metal increases (dotted line of accompanying drawing 2 increases volume with the lower part for the dentine nut), both are leveled off to the equal strength designing requirement as far as possible, improve both junction and bear pulling-out force and sting
The two-way intensity of power improves retention effect; Seal voluntarily and improve the production rate for reaching threaded notch, the thrust closed section adopts two gardens annular so that product can with productivity ratio in the screw production method the highest frustrate a method manufacturing.
The specific embodiment that this utility model is realized is:
Retention pin is a material with the austenitic stainless steel steel grade, makes through frustrating silk processing and Passivation Treatment.
(1) material: adopting homemade austenitic stainless steel steel grade is material, and its basic chemical analysis content requirement is: carbon (C)≤0.08%, chromium (Cr) 〉=18%, nickel (Ni) 〉=8%, molybdenum (Mo) are 1.2～3.5%, manganese (Mn)≤2.0%, silicon (Si)≤1.0%, sulfur (S)≤0.03%, phosphorus (P)≤0.035%, all the other are ferrum (Fe) and other elements.As: trade mark austenitic stainless steels such as OCr19Ni9, OOCr19Ni11, OCr19Ni13Mo3, OOCr19Ni13Mo3 all can be made material of the present utility model.
(2) concrete structure of retention pin is by description of drawings:
Accompanying drawing 1 for tooth of the present utility model with the passivation self tapping bone thread retention pin outline drawing of autotomying.
Accompanying drawing 2 for tooth of the present utility model with the passivation self tapping bone thread retention pin profile of tooth figure that autotomys.
The unidirectional angle bone thread profile of tooth figure of accompanying drawing 3 for delivering in the international biological annual meeting.
This tooth comprises a nail handle (7) and is connected in series a joint or two joint drive screw bodies (1～6) into one mutually with nail handle (7) lower end with the passivation self tapping bone thread retention pin of autotomying, every joint nail body (1～6) length is 2.0～6.5mm, and major diameter of thread is 0.38～0.8mm.Nail handle (7) upper end is contained in the common dental drill machine or manually.Every joint drive screw body (1～6) is by maintenance section (2), dentine growth self-enclosed section (3), thrust closed section (4), dummy maintenance section (5) in guide section (1) and the dentine foremost, and the last neck of autotomying compositions such as (6).Guide section (1) is the Leading end chamfer cylinder, leads during tapping in prebored hole in order to retention pin.Maintenance section (2) length is 1.5～3.0mm in the dentine, and the profile of tooth of its thread (8) is two-way bone thread, and angle is 5 °～15 °, and the profile of tooth height is 0.03～0.10mm, and tooth pitch is 0.10～0.30mm, in order to fixing in the dentine.Dentine growth self-enclosed section (3) is the garden cylindricality, in order to threaded notch on the further sealing dentin.Thrust closed section (4) is two gardens annulars, slightly larger in diameter in or equal major diameter of thread, in order to only attack, thrust, make dentine bear the bigger pressure that nail transmitted.Dummy maintenance section (5) length is 0.5～3.5mm, and the profile of tooth of its thread (9) is two-way bone thread, and each parameter is with (8), in order to fixed restoration.Neck (6) diameter of autotomying should be able to be born the tapping torque greater than tapping resistance 10～20%, and guarantees to attack to two annulus place to autotomy, and makes to repair operation and be easy to realize.Structure of the present utility model is that reasonably biocompatibility is better than gold although this retention pin surface is the pottery chromium-containing oxide, and its corrosion resistance levels off to gold, and people's custom prefers gold-plated, use for enlarging, and be gold-plated for this this retention pin also has part.
(3) Passivation Treatment
Passivation Treatment solution: by chromic oxide (Cr
2O
3), sulphuric acid (H
2SO
4), auxiliary agent and stabilizing agent etc. form.Chromic oxide (Cr in the solution
2O
3) concentration is 180～300 grams per liters, sulphuric acid (H
2SO
4) concentration is 400～500 grams per liters.
The passivation process condition: temperature is 60～80 ℃, and applied voltage is 0.6～2.0 volt.
After sealing treatment, neutralization clean product of the present utility model.
During clinical use, select earlier retention pin and use with the supporting drill bit of retention pin and pack in the common dental drill locomotive head, repair prebored hole on the tooth body the patient, after the prebored hole,, will follow closely and insert in the prebored hole again the retention pin headstock of packing into, drive the guiding tapping by the dental drill machine, when attacking the two annulus place to threaded middle thrust closed section (4), the tooth body increases suddenly to pressure the root of retention pin, and the neck of autotomying of retention pin fractures voluntarily.The second joint nail body uses (tapping also can manually) by the same operation method.After the treatment,, make retention pin biocompatibility and good corrosion resistance because screw thread retention pin passivation top layer is the pottery chromium-containing oxide; Because retention pin is two-way bone thread, has improved the intensity and the anti-bite of metal threaded tooth and dentine nut junction
The function of power firmly is embedded in the screw thread retention pin and repairs in the tooth body; Because two circle diameters of thrust closed section (4) are slightly larger than or equal the bone thread external diameter, reach the effect that the dentine upper cut is well sealed.
This utility model compared with the prior art, tooth is autotomyed the bone thread retention pin through the tooth test of exsomatizing with the passivation self tapping, after the screw thread retention pin is shot dentin 5 buttons, 8～15 kilograms of effective pulls.Treat since in 1985 to 26 patients, so far and do not find that dental tissue zest simplified reaction is arranged, corrosion resistance, maintenance and sealing effect are good, meet clinical instructions for use fully.This retention pin can select more austenitic stainless steel steel grade as manufactured materials, can adopt simultaneously produce screw productivity ratio the highest frustrate a method manufacturing.Has the application value of being easy to.
Claims (3)
1, a kind of tooth is with the self tapping screw thread retention pin of autotomying, comprise a nail handle (7) and be connected in series a joint or two joint drive screw bodies (1～6) mutually, of the present utility modelly be characterised in that the spiral shell tooth of maintenance section (2) and dummy maintenance section (5) is two-way bone thread profile of tooth (8,9) in the dentine in this drive screw body (1～6) into one with the nail pommel; The screw thread retention pin is a material with the austenitic stainless steel steel grade, through Passivation Treatment, makes its surface generate the pottery chromium-containing oxide.
2, tooth as claimed in claim 1 is with the self tapping screw thread retention pin of autotomying, the two-way bone thread profile of tooth (8,9) that is characterised in that of the present utility model, angle is 5 °～15 °, tooth depth is 0.03～0.10mm, tooth pitch is 0.10～0.30mm, maintenance section (2) length is 1.5～3.0mm in the dentine, and dummy maintenance section (5) length is 0.5～3.5mm.
3, tooth as claimed in claim 1 is with the self tapping screw thread retention pin of autotomying, and of the present utility modelly is characterised in that the thrust closed section (4) in the drive screw body (1～6) is two annulars, and two circle diameters are slightly larger than or equal major diameter of thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87205896 CN87205896U (en) | 1987-03-31 | 1987-03-31 | Dental position fixing screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87205896 CN87205896U (en) | 1987-03-31 | 1987-03-31 | Dental position fixing screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87205896U true CN87205896U (en) | 1988-05-04 |
Family
ID=4821567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87205896 Ceased CN87205896U (en) | 1987-03-31 | 1987-03-31 | Dental position fixing screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87205896U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107028667A (en) * | 2017-05-23 | 2017-08-11 | 杭州西湖生物材料有限公司 | Tooth is autotomyed bone thread retention pin with self tapping |
-
1987
- 1987-03-31 CN CN 87205896 patent/CN87205896U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107028667A (en) * | 2017-05-23 | 2017-08-11 | 杭州西湖生物材料有限公司 | Tooth is autotomyed bone thread retention pin with self tapping |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |