CN104622591A - Miniature anchorage screw and correcting device with same - Google Patents
Miniature anchorage screw and correcting device with same Download PDFInfo
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- CN104622591A CN104622591A CN201510102527.XA CN201510102527A CN104622591A CN 104622591 A CN104622591 A CN 104622591A CN 201510102527 A CN201510102527 A CN 201510102527A CN 104622591 A CN104622591 A CN 104622591A
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Abstract
The invention discloses a miniature anchorage screw and a correcting device with the same. A circumferential stabilizing groove is formed in a screw rod main body and is arranged in the tail end of the screw rod main body. The circumferential stabilizing groove comprises a first cavity wall, a second cavity wall and a cavity formed by the first cavity wall and the second cavity wall; the surface where the first cavity wall of the circumferential stabilizing groove is located is vertical to the surface where a threaded guide of the screw rod main body is located; the length of the cavity is equal to the distance among 3-4 tooth-shaped bodies, and the depth of the cavity is equal to the height of a tooth; the first cavity wall and the screw rod main body form a rotary cutting angle; and the rotation direction of the rotary cutting angle is opposite to the implanting rotation direction of the screw rod main body. After the anchorage screw is implanted to a gum, a compact bone grows to fill the circumferential stabilizing groove, so that the implanted miniature anchorage screw obtains a resistance surface along the tangential direction of a circumference, and the phenomenon of circumferential rotary displacement of the implanted miniature anchorage screw is avoided. By using the miniature anchorage screw, the circumferential stability of the miniature anchorage screw can be improved, and the condition that the deformity collecting effect is reduced because of harmful release of a traction force is avoided.
Description
Technical field
The invention belongs to orthodontic equipment technical field, particularly relate to a kind of miniature anchorage nail and the apparatus for correcting containing this miniature anchorage nail.
Background technology
Orthodontics treats tooth malocclusion by surgical operation or correction equipment.Surgical operation therapy tooth malocclusion costly, recover comparatively slow, and curative effect is not good enough, and therefore most tooth malocclusion patient can select to wear correction equipment and carrys out straightening of teeth malocclusion.Miniature anchorage nail is as one of conventional correction equipment, and application widely.
Traditional miniature anchorage nail, divides according to the shape of its implant part, is divided into column type and taper.Its implantation process mainly comprises the following steps: the mucosal membrane incisions of millimeters long of first counting on the position designed, on the Compact bone exposed, bullport is opened again with adaptive drill bit, then miniature anchorage nail is rotated into from bullport, after implanting, two weeks left and right wound healing, finally just makes Orthodontic traction.Its operating time span is comparatively large, easily occurs the phenomenon that implant part loosens or implant part lost efficacy when distraction procedure.
Therefore, the miniature self-taped type anchorage nail of a kind of correction as patent CN202821672U records has been there is in prior art, as shown in Figure 1, comprise integrated anchorage nail screw tip 1, screw body 2, non-sclerotin inlet part 3, anchorage nail moment input section 4 and pull strength and hang ligation part 5.
This anchorage nail screw tip 1 adopt 50 degree of cone angles, circumference phase place arranges the axial flare cambered surface that an effective length is no more than 2 pitch, this axial flare cambered surface is arranged radial cutting be 90 degree cut groove structure.Anchorage is followed closely and in head self tapping process, possesses good cutting hardness and row cuts effect, effectively reduce the radial moment of torsion of head material in self tapping process, eliminating the break phenomenon also forms good guiding condition.
This screw body 2 adopts 1 degree of cone angle, guarantees that each joint that screw body 2 is implanting Compact bone rear thread can be subject to uniform radial centripetal extrusion stress.Ridge body is under the condition determining rational profile of tooth height, profile angle is asymmetrical form, as shown in Figure 2, i.e. G1<G2, the screw axial component of the screw axial component >G2 of G1 when being subject to centripetal extrusion stress, and the resultant direction of G1 and G2 is consistent with the implantation depth direction that anchorage is followed closely.
This non-sclerotin inlet part 3 comprises integrated curved surface and disc-shaped bodies, guarantees that planting process has the extruding of mellow and full gradual change to gingiva contact surface, the inflammation that the excessive damage of elimination gingiva and damage bring.
This anchorage nail moment input section 4 side of employing cored structure, be equipped with higher dimensional accuracy, possess suitable moment contact surface and twisting resistance deformation body, the through hole that it is arranged can be cylindrical hole or rectangular through holes etc.
This pull strength hangs ligation part 5 guaranteeing enough shear strength bases are equipped with deep trouth, meets multiple tractive ligation.
Traditional miniature anchorage nail compared by this correction miniature self-taped type anchorage nail of prior art, and on Compact bone, open bullport without the need to first carrying out Minimally Invasive Surgery on the one hand, can directly enter in Compact bone, amount of bleeding be little self-tapping type; On the other hand, there is not unnecessary wound, after self-tapping type enters Compact bone maintenance, namely enter tractive, effectively shorten the correction cycle, facilitate operation, and avoid in distraction procedure the phenomenon occurring that implant part loosens or implant part lost efficacy.
But analyze this correction miniature self-taped type anchorage pin structure of prior art, find still there is following shortcoming: after anchorage nail actual implantation Compact bone, start to do Orthodontic traction, tooth is connected with anchorage nail with bracket with arch wire, with anchorage nail for fixing point, utilize arch wire to draw tooth, make it correct.But be not difficult to find, in the miniature self-taped type anchorage nail of the correction of prior art, the output point of traction ligation Zhi Kangli reality hangs ligation part 5 in moment input section 4 and pull strength.In practical clinical, often occur to make because this place is stressed whole anchorage follow closely and produce torque, cause anchorage to follow closely the phenomenon producing circumferential displacement, thus result in the bad release of pull strength, reduce the effectiveness of orthodontic.
Summary of the invention
Object of the present invention is just to provide a kind of miniature anchorage nail and the apparatus for correcting containing this miniature anchorage nail, both Compact bone can be entered by self-tapping type, do not cause unnecessary wound, the correction cycle is short, avoid the phenomenon that implant part in distraction procedure loosens or lost efficacy, anchorage can be avoided again to follow closely produce circumferential displacement and the bad release of pull strength that causes.
To achieve these goals, technical solution of the present invention is as follows:
A miniature anchorage nail, comprises integrated anchorage nail screw tip, screw body, non-sclerotin inlet part, anchorage nail moment input section and pull strength and hangs ligation part, described screw body is provided with circumferential gutter.
Further, described circumferential gutter is arranged on the tail end of described screw body.When anchorage nail shirks, be F in acrotorque
tafter can shearing Compact bone like a cork under effect, circumferentially the direction of rotation guiding of gutter is discharged.
Further, described circumferential gutter comprises the cavity of the first chamber wall, the second chamber wall and described first chamber wall and the second chamber wall formation, the face at the first wall place, chamber of described circumferential gutter is perpendicular to the face at the screw thread guiding place of described screw body, described cavity length is 3 ~ 4 thread form body spacing, and the degree of depth is tooth depth.
After anchorage follows closely implantation Compact bone, Compact bone growth filling cavity, thus make implanted miniature anchorage nail obtain the tangential resistance area of circumference, avoid implanted miniature anchorage to follow closely the phenomenon of the displacement that rotates in a circumferential direction, improve the circumferential stability that miniature anchorage is followed closely.
Further, described first chamber wall and described screw body form rotary cutting top rake, and the direction of rotation of described rotary cutting top rake is contrary with the direction of rotation that described screw body is implanted.Counter-rotating cutting angle, can guarantee to move back swimmingly after anchorage nail cuts Compact bone by dynamic torque tool under certain torsional forces condition to draw off implanted position.
Further, the account form that described rotary cutting top rake is stressed is as follows:
Suppose shearing stress f suffered by the first chamber wall
n, the helical angle ∠ W of described screw body, the screw thread of the first chamber wall and the screw body angle that leads equals 90 degree, therefore analyzes shearing stress f suffered by the first chamber wall
ncomponent on the first chamber wall and in the normal direction vertical with the first chamber wall is respectively f
pand f
s, described f
n, f
pand f
sbetween reduction formula be f
p=f
n* SIN ∠ W, f
s=f
n* COS ∠ W;
Assuming that the minimum stress that twists off of anchorage nail is F
0, it is F that anchorage follows closely the acrotorque shirked
t, the thread form body number N on the first chamber wall to make a concerted effort F to the torsion that Compact bone produces
n, it is F that anchorage follows closely acrotorque suffered in correction process after the implantation
d, F
0, F
t, F
n andf
dpass be F
n=f
n* N, F
t<F
0, F
d<F
n, F
d<F
t.Under the state of less torsional stress, reversely rotate from Compact bone and unload de-anchorage nail (elimination twists off phenomenon).
Wherein a kind of embodiment of rotary cutting top rake design is for as N=3, and the stressed account form of described rotary cutting top rake is as follows:
Needed for the weak and lasting standard setting of mouth cavity orthodontic, Orthodontic force is 50-150 gram, and namely anchorage follows closely acrotorque F suffered in correction process after the implantation
dfor 50-150 gram, and set F
n=180 grams is that thread form body number N on the first chamber wall makes a concerted effort to the torsion that Compact bone produces; Then average each tooth stressed f of little first chamber wall physically
n=F
n/ 3=180/3=60 gram;
Assuming that in the present embodiment helical angle ∠ W=68.04 ° (according to M2.0 anchorage oncomelania bar meter, here temporarily not by reference diameter);
Then average each tooth little first chamber wall is physically stressed:
F
p=f
n* SIN ∠ W=60*SIN68.04=55.65 gram
F
s=f
n* COS ∠ W=60*COS68.04=22.44 gram
Shearing stress f
ncomponent on the first chamber wall and in the normal direction vertical with the first chamber wall is respectively f
pand f
s, f
pfor each tooth effective shearing force of little first chamber wall when anchorage follows closely suffered acrotorque to Compact bone physically; f
sfor the component in thread helix lift angle direction, for anchorage nail shirk time at acrotorque F
teffect is lower can play the power effectively led needed for discharge along gutter lead angle direction by the Compact bone be sheared;
Setting f
wfor the shear strength of implanted part Compact bone, slightly different according to patient profiles, need herein to judge, if f
pbe greater than f
w,then can increase effective thread thread form body number N in the hope of f
ndecreasing value; If f
pbe less than f
w,then can reduce effective thread thread form body number N in the hope of f
ndecreasing value.
The invention allows for the apparatus for correcting comprising this miniature anchorage nail: described apparatus for correcting comprises miniature anchorage nail, arch wire and locking bracket, described miniature anchorage nail comprises integrated anchorage nail screw tip, screw body, non-sclerotin inlet part, anchorage nail moment input section and pull strength and hangs ligation part, and described screw body is provided with circumferential gutter.
The miniature anchorage nail that the present invention proposes and the apparatus for correcting comprising this miniature anchorage nail, comprise integrated anchorage nail screw tip, screw body, non-sclerotin inlet part, anchorage nail moment input section and pull strength and hang ligation part, screw body is also provided with circumferential gutter.After dental bed implanted by anchorage nail, Compact bone growth filling circumference gutter, thus make implanted miniature anchorage nail obtain the tangential resistance area of circumference, implanted miniature anchorage is avoided to follow closely the phenomenon of the displacement that rotates in a circumferential direction, improve the circumferential stability of miniature anchorage nail, avoid the bad release of pull strength and reduce the situation of deformity correction effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the miniature anchorage nail of prior art.
Fig. 2 is the I portion enlarged drawing of Fig. 1.
Fig. 3 is the structural representation of miniature anchorage nail of the present invention.
Fig. 4 is that the screw thread of miniature anchorage nail of the present invention turns to schematic diagram.
Fig. 5 is the structural representation of the circumferential gutter of miniature anchorage nail of the present invention.
Fig. 6 is the top view of the miniature anchorage nail of the present invention.
Fig. 7 is the stressed schematic diagram of rotary cutting top rake of the present invention's miniature anchorage nail.
In figure, Reference numeral is as follows: 1, anchorage nail screw tip; 2, screw body; 3, non-sclerotin inlet part; 4, anchorage nail moment input section; 5, pull strength hangs ligation part; 6, circumferential gutter; 7, the first chamber wall; 8, the second chamber wall; 9, cavity; 10, rotary cutting top rake; 11, thread form body.
Detailed description of the invention
Be described in further details technical solution of the present invention below in conjunction with drawings and Examples, following examples do not form limitation of the invention.
As shown in Figure 3, miniature anchorage nail of the present invention, the circumferential gutter 6 comprising anchorage nail screw tip 1, screw body 2, non-sclerotin inlet part 3, anchorage nail moment input section 4, pull strength suspension ligation part 5 and be arranged on screw body 2.
Wherein, anchorage nail screw tip 1 adopt 50 degree of cone angles, circumference phase place arranges the axial flare cambered surface that an effective length is no more than 2 pitch, this axial flare cambered surface is arranged radial cutting be 90 degree cut groove structure.Determine turning to of the screw thread of this anchorage nail simultaneously.As shown in Figure 4, in the present embodiment, screw thread turn to as clockwise.
The diameter of screw body 2 from top to tail end increases gradually, screw body 2 is provided with some convex screw threads.The spacing of the screw thread of some convex shapees is identical.
Non-sclerotin inlet part 3 is the frustum cone structure outwards extended to form again from the tail end of screw body 2, this frustum cone structure is provided with a disc structure, the small end of this frustum cone structure is connected with the tail end of screw body 2, large end is connected with disc structure, in the miniature anchorage nail process industry of reality, the non-sclerotin inlet part 3 of screw body 2 is formed in one, and normal lathe or the milling machine of adopting processes.
Anchorage nail moment inputs section 4 and pull strength hangs ligation part 5 and anchorage pin structure of the prior art is similar, therefore do not repeat them here.
3 ~ 4 thread form bodies 11 at the tail end place of screw body 2 are provided with circumferential gutter 6.
Specifically, suppose that screw body 2 is in the present embodiment provided with 11 thread form bodies 11 from top altogether to tail end, respectively called after thread form body 1, thread form body 2, thread form body 3, thread form body 4, thread form body 5, thread form body 6, thread form body 7, thread form body 8, thread form body 9, thread form body 10 and thread form body 11.
Then embodiment one is: circumferential gutter 6 is arranged on thread form body 9, thread form body 10 and thread form body 11.
Embodiment two is: circumferential gutter 6 is arranged on thread form body 8, thread form body 9, thread form body 10 and thread form body 11.
Certainly, thread form body 11 quantity that screw body 2 is provided with to tail end altogether from top is not unique, can regulate as required, and in like manner, the position of circumferential gutter 6 also can regulate according to the length of screw body 2, but is in the tail end of screw body 2 all the time.
Citing one: screw body 2 is provided with 10 thread form bodies 11 from top altogether to tail end, respectively called after thread form body 1, thread form body 2, thread form body 3, thread form body 4, thread form body 5, thread form body 6, thread form body 7, thread form body 8, thread form body 9 and thread form body 10.For embodiment one, circumferential gutter 6 is arranged at thread form body 8, thread form body 9 and thread form body 10; For embodiment two, be arranged at thread form body 7, thread form body 8, thread form body 9 and thread form body 10 to gutter.
Citing two: screw body 2 is provided with 12 thread form bodies 11 from top altogether to tail end, respectively called after thread form body 1, thread form body 2, thread form body 3, thread form body 4, thread form body 5, thread form body 6, thread form body 7, thread form body 8, thread form body 9, thread form body 10, thread form body 11 and thread form body 12.For embodiment one, circumferential gutter 6 is arranged at thread form body 10, thread form body 11 and thread form body 12; For embodiment two, be arranged at thread form body 9, thread form body 10, thread form body 11 and thread form body 12 to gutter.
As shown in Figure 5, circumferential gutter 6 of the present invention comprises the cavity 9 that the first chamber wall 7, second chamber wall 8 and the first chamber wall 7 and the second chamber wall 8 are formed.
Wherein, from axially, the plane orthogonal at the first chamber wall 7 place is in the plane at the screw thread guiding place of this screw body 2; And look up from footpath, the plane at the first chamber wall 7 place is vertical with the radial tangent line of the circumference at the place, summit of this first chamber wall 7.Screw thread guiding is called helical angle with angle formed by the central shaft of screw body 2, in the present invention, suppose that helical angle is ∠ W, then formed by the central shaft of this first chamber wall 7 and screw body 2, angle is (90 degree deduct ∠ W).In other words, angle and helical angle formed by the central shaft of this first chamber wall 7 and screw body 2 mutually more than.
It should be noted that the first chamber wall 7 forms rotary cutting top rake 10 with screw body 2, for taking out counter-rotating when miniature anchorage is followed closely, can guarantee to move back swimmingly after anchorage nail cuts Compact bone by dynamic torque tool under certain torsional forces condition to draw off implanted position.This rotary cutting top rake 10 is acute angle, and the straight line place at place, summit is comparatively sharp.The direction of rotation when direction of rotation of this rotary cutting top rake 10 is implanted with screw body 2 is contrary.
Angle formed by the plane at the second chamber wall 8 place and the plane at the first chamber wall 7 place is about due to 90 degree.
First chamber wall 7 and the second chamber wall 8 define cavity 9, the length of this cavity 9 is 3 ~ 4 thread form body 11 spacing, the degree of depth is thread form body 11 height, width does not clearly limit numerical value, but determine according to concrete milling machine processing technique, its standard is do not injure the part (namely the degree of depth is less than or equal to the height of sub-body 11) screw body 2 removing raised thread, in other words, when the setting milling machine depth of cut, as long as preseting length and the degree of depth clearly, when not injuring part screw body 2 removing raised thread, arbitrary width is all fine.
As shown in Figure 6, in fact circumferential gutter 6 of the present invention is made up of 3 ~ 4 small-sized circumferential gutters 6 on screw body 2,3 ~ 4 thread form bodies 11 is respectively arranged with a small-sized circumferential gutter 6.These 3 ~ 4 small-sized circumferential gutters 6 along screw body 2 screw thread rotation and rotate.
Circumferential gutter 6 of the present invention, mainly utilizes milling machine to process.Fixture carries out rotation after clamping miniature anchorage nail, simultaneously the milling cutter axial feed of milling machine, thus mills out the circumferential gutter 6 of a screw thread vertically and on screw body 2.
When miniature anchorage nail is when exiting implanted Compact bone, rotary cutting top rake 10 is maximum by the pressure of Compact bone, and in other words, the pressure suffered by the first chamber wall 7 is maximum.
Concrete Force Calculation mode is as follows:
As shown in Figure 7, shearing stress f suffered by the first chamber wall 7 is supposed
n, the helical angle ∠ W of screw body 2, the first chamber wall 7 and the screw thread of screw body 2 angle that leads equals 90 degree, therefore analyzes shearing stress f suffered by the first chamber wall 7
ncomponent on the first chamber wall 7 and in the normal direction vertical with the first chamber wall 7 is respectively f
pand f
s, described f
n, f
pand f
sbetween reduction formula be f
p=f
n* SIN ∠ W, f
s=f
n* COS ∠ W;
Assuming that the minimum stress that twists off of anchorage nail is F
0, it is F that anchorage follows closely the acrotorque shirked
t, the thread form body number N on the first chamber wall 7 to make a concerted effort F to the torsion that Compact bone produces
n, it is F that anchorage follows closely acrotorque suffered in correction process after the implantation
d, F
0, F
t, F
nand F
dpass be F
n=f
n* N, F
t<F
0, F
d<F
n, F
d<F
t.
According to the setting of the weak and lasting Orthodontic force (50-150 gram) of mouth cavity orthodontic, namely anchorage follows closely acrotorque F suffered in correction process after the implantation
dfor 50-150 gram, and set F
n=180 grams is that thread form body number N on the first chamber wall 7 makes a concerted effort to the torsion that Compact bone produces.
For embodiment one:
If the first chamber wall 7 actual effective thread thread form body number N=3,
The stressed f of little first chamber wall 7 then on average each thread form body 11
n=F
n/ 3=180/3=60 gram.
Assuming that in the present embodiment helical angle ∠ W=68.04 ° (according to M2.0 anchorage oncomelania bar meter, here temporarily not by reference diameter)
Little first chamber wall 7 then on average each thread form body 11 is stressed:
F
p=f
n* SIN ∠ W=60*SIN68.04=55.65 gram
F
s=f
n* COS ∠ W=60*COS68.04=22.44 gram
Shearing stress f
ncomponent on the first chamber wall 7 and in the normal direction vertical with the first chamber wall 7 is respectively f
pand f
s, in other words, f
pthe effective shearing force of little first chamber wall 7 on each thread form body 11 when the suffered acrotorque of anchorage nail to Compact bone.
Setting f
wfor the shear strength of implanted part Compact bone, slightly different according to patient profiles, need herein to judge, if f
pbe greater than f
w, then effective thread thread form body number N can be increased in the hope of f
ndecreasing value; If f
pbe less than f
w, then effective thread thread form body number N can be reduced in the hope of f
ndecreasing value.
F
sfor the component in thread helix lift angle direction, its effect is that anchorage is followed closely when shirking at acrotorque F
teffect is lower can play discharge of effectively being led along gutter lead angle direction by the Compact bone be sheared.
For embodiment two:
If the first chamber wall 7 actual effective thread thread form body number N=4,
The stressed f of little first chamber wall 7 then on average each thread form body 11
n=F
n/ 4=180/4=45 gram.
Assuming that in the present embodiment helical angle ∠ W=68.04 ° (according to M2.0 anchorage oncomelania bar meter, here temporarily not by reference diameter)
Little first chamber wall 7 then on average each thread form body 11 is stressed:
F
p=f
n* SIN ∠ W=45*SIN68.04=41.74 gram
F
s=f
n* COS ∠ W=45*COS68.04=16.82 gram
Shearing stress f
ncomponent on the first chamber wall 7 and in the normal direction vertical with the first chamber wall 7 is respectively f
pand f
s, in other words, f
pthe effective shearing force of little first chamber wall 7 on each thread form body 11 when the suffered acrotorque of anchorage nail to Compact bone.
Setting f
wfor the shear strength of implanted part Compact bone, slightly different according to patient profiles, need herein to judge, if f
pbe greater than f
w, then effective thread thread form body number N can be increased in the hope of f
ndecreasing value; If f
pbe less than f
w, then effective thread thread form body number N can be reduced in the hope of f
ndecreasing value.
F
sfor the component in thread helix lift angle direction, its effect is that anchorage is followed closely when shirking at acrotorque F
teffect is lower can play discharge of effectively being led along gutter lead angle direction by the Compact bone be sheared.
The invention allows for a kind of apparatus for correcting, comprise miniature anchorage nail, arch wire and locking bracket, miniature anchorage nail comprises the anchorage nail screw tip 1, screw body 2, non-sclerotin inlet part 3, anchorage nail moment input section 4 and the pull strength that are fixedly connected sequentially and hangs ligation part 5, screw body 2 is provided with circumferential gutter 6.
Above embodiment is only in order to illustrate technical scheme of the present invention but not to be limited; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (8)
1. a miniature anchorage nail, comprises integrated anchorage nail screw tip, screw body, non-sclerotin inlet part, anchorage nail moment input section and pull strength and hangs ligation part, it is characterized in that, described screw body is provided with circumferential gutter.
2. miniature anchorage nail according to claim 1, it is characterized in that, described circumferential gutter is arranged on the tail end of described screw body.
3. miniature anchorage nail according to claim 2, it is characterized in that, described circumferential gutter comprises the first chamber wall, the cavity of the second chamber wall and described first chamber wall and the second chamber wall formation, the face at the first wall place, chamber of described circumferential gutter is perpendicular to the face at the screw thread guiding place of described screw body, described cavity length is 3 ~ 4 thread form body spacing, the degree of depth is tooth depth, described first chamber wall and described screw body form rotary cutting top rake, the direction of rotation of described rotary cutting top rake is contrary with the direction of rotation that described screw body is implanted, the stressed account form of described rotary cutting top rake is as follows:
Suppose shearing stress f suffered by the first chamber wall
n(N=3 or 4), the helical angle ∠ W of described screw body, the screw thread of the first chamber wall and the screw body angle that leads equals 90 degree, therefore analyzes shearing stress f suffered by the first chamber wall
ncomponent on the first chamber wall and in the normal direction vertical with the first chamber wall is respectively f
pand f
s, described f
n, f
pand f
sbetween reduction formula be f
p=f
n* SIN ∠ W, f
s=f
n* COS ∠ W;
Assuming that the minimum stress that twists off of anchorage nail is F
0, it is F that anchorage follows closely the acrotorque shirked
t, the thread form body number N on the first chamber wall to make a concerted effort F to the torsion that Compact bone produces
n, it is F that anchorage follows closely acrotorque suffered in correction process after the implantation
d, F
0, F
t, F
n andf
dpass be F
n=f
n* N, F
t<F
0, F
d<F
n, F
d<F
t.
4. miniature anchorage nail according to claim 3, is characterized in that, as N=3, the stressed account form of described rotary cutting top rake is as follows:
Needed for the weak and lasting standard setting of mouth cavity orthodontic, Orthodontic force is 50-150 gram, and namely anchorage follows closely acrotorque F suffered in correction process after the implantation
dfor 50-150 gram, and set F
n=180 grams is that thread form body number N on the first chamber wall makes a concerted effort to the torsion that Compact bone produces; Then average each tooth stressed f of little first chamber wall physically
n=F
n/ 3=180/3=60 gram;
Assuming that in the present embodiment helical angle ∠ W=68.04 ° (according to M2.0 anchorage oncomelania bar meter, here temporarily not by reference diameter);
Then average each tooth little first chamber wall is physically stressed:
F
p=f
n* SIN ∠ W=60*SIN68.04=55.65 gram
F
s=f
n* COS ∠ W=60*COS68.04=22.44 gram
Shearing stress f
ncomponent on the first chamber wall and in the normal direction vertical with the first chamber wall is respectively f
pand f
s,
F
pfor each tooth effective shearing force of little first chamber wall when anchorage follows closely suffered acrotorque to Compact bone physically;
F
sfor the component in thread helix lift angle direction, for anchorage nail shirk time at acrotorque F
teffect is lower can play the power effectively led needed for discharge along gutter lead angle direction by the Compact bone be sheared;
Setting f
wfor the shear strength of implanted part Compact bone, slightly different according to patient profiles, need herein to judge, if f
pbe greater than f
w, then effective thread thread form body number N can be increased in the hope of f
ndecreasing value; If f
pbe less than f
w, then effective thread thread form body number N can be reduced in the hope of f
ndecreasing value.
5. an apparatus for correcting, comprise miniature anchorage nail, arch wire and locking bracket, described miniature anchorage nail comprises integrated anchorage nail screw tip, screw body, non-sclerotin inlet part, anchorage nail moment input section and pull strength and hangs ligation part, it is characterized in that, described screw body is provided with circumferential gutter.
6. apparatus for correcting according to claim 5, is characterized in that, described circumferential gutter is arranged on the tail end of described screw body.
7. apparatus for correcting according to claim 6, it is characterized in that, described circumferential gutter comprises the first chamber wall, the cavity of the second chamber wall and described first chamber wall and the second chamber wall formation, the face at the first wall place, chamber of described circumferential gutter is perpendicular to the face at the screw thread guiding place of described screw body, described cavity length is 3 ~ 4 thread form body spacing, the degree of depth is tooth depth, described first chamber wall and described screw body form rotary cutting top rake, the direction of rotation of described rotary cutting top rake is contrary with the direction of rotation that described screw body is implanted, the stressed account form of described rotary cutting top rake is as follows:
Suppose shearing stress f suffered by the first chamber wall
n, the helical angle ∠ W of described screw body, the screw thread of the first chamber wall and the screw body angle that leads equals 90 degree, therefore analyzes shearing stress f suffered by the first chamber wall
ncomponent on the first chamber wall and in the normal direction vertical with the first chamber wall is respectively f
pand f
s, described f
n, f
pand f
sbetween reduction formula be f
p=f
n* SIN ∠ W, f
s=f
n* COS ∠ W;
Assuming that the minimum stress that twists off of anchorage nail is F
0, it is F that anchorage follows closely the acrotorque shirked
t, the thread form body number N on the first chamber wall to make a concerted effort F to the torsion that Compact bone produces
n, it is F that anchorage follows closely acrotorque suffered in correction process after the implantation
d, F
0, F
t, F
n andf
dpass be F
n=f
n* N, F
t<F
0, F
d<F
n, F
d<F
t.
8. apparatus for correcting according to claim 7, is characterized in that, as N=3, the stressed account form of described rotary cutting top rake is as follows:
Needed for the weak and lasting standard setting of mouth cavity orthodontic, Orthodontic force is 50-150 gram, and namely anchorage follows closely acrotorque F suffered in correction process after the implantation
dfor 50-150 gram, and set F
n=180 grams is that thread form body number N on the first chamber wall makes a concerted effort to the torsion that Compact bone produces; Then average each tooth stressed f of little first chamber wall physically
n=F
n/ 3=180/3=60 gram;
Assuming that in the present embodiment helical angle ∠ W=68.04 ° (according to M2.0 anchorage oncomelania bar meter, here temporarily not by reference diameter);
Then average each tooth little first chamber wall is physically stressed:
F
p=f
n* SIN ∠ W=60*SIN68.04=55.65 gram
F
s=f
n* COS ∠ W=60*COS68.04=22.44 gram
Shearing stress f
ncomponent on the first chamber wall and in the normal direction vertical with the first chamber wall is respectively f
pand f
s, f
pfor each tooth effective shearing force of little first chamber wall when anchorage follows closely suffered acrotorque to Compact bone physically; f
sfor the component in thread helix lift angle direction, for anchorage nail shirk time at acrotorque F
teffect is lower can play the power effectively led needed for discharge along gutter lead angle direction by the Compact bone be sheared;
Setting f
wfor the shear strength of implanted part Compact bone, slightly different according to patient profiles, need herein to judge, if f
pbe greater than f
w, then effective thread thread form body number N can be increased in the hope of f
ndecreasing value; If f
pbe less than f
w, then effective thread thread form body number N can be reduced in the hope of f
ndecreasing value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102527.XA CN104622591B (en) | 2015-03-09 | 2015-03-09 | A kind of miniature anchorage nail and the apparatus for correcting followed closely containing the miniature anchorage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102527.XA CN104622591B (en) | 2015-03-09 | 2015-03-09 | A kind of miniature anchorage nail and the apparatus for correcting followed closely containing the miniature anchorage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104622591A true CN104622591A (en) | 2015-05-20 |
| CN104622591B CN104622591B (en) | 2017-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510102527.XA Active CN104622591B (en) | 2015-03-09 | 2015-03-09 | A kind of miniature anchorage nail and the apparatus for correcting followed closely containing the miniature anchorage |
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| Country | Link |
|---|---|
| CN (1) | CN104622591B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106901848A (en) * | 2017-04-19 | 2017-06-30 | 威海威高洁丽康生物材料有限公司 | A kind of new anchorage nail |
| CN108294838A (en) * | 2017-12-26 | 2018-07-20 | 苏州口腔医院有限公司 | One kind forcing down orthadontic appliance of going forward |
| CN111220371A (en) * | 2020-03-08 | 2020-06-02 | 哈尔滨理工大学 | Device for measuring maximum torque borne by vertical orthodontic anchorage nail and using method |
| CN113679441A (en) * | 2019-05-13 | 2021-11-23 | 深圳市立心科学有限公司 | Extrusion nail with anti-skid function |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201453389U (en) * | 2009-06-30 | 2010-05-12 | 中国人民解放军第四军医大学 | Mini-implant anchorage |
| CN202776602U (en) * | 2012-03-09 | 2013-03-13 | 爱德芳世株式会社 | Implant for dental department |
| CN202821672U (en) * | 2012-09-13 | 2013-03-27 | 杭州西湖生物材料有限公司 | Orthodontics micro-type self-tapping type anchorage nail |
| CN203029412U (en) * | 2012-11-12 | 2013-07-03 | 安泰科技股份有限公司 | Three-section dental implant |
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2015
- 2015-03-09 CN CN201510102527.XA patent/CN104622591B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106901848A (en) * | 2017-04-19 | 2017-06-30 | 威海威高洁丽康生物材料有限公司 | A kind of new anchorage nail |
| CN106901848B (en) * | 2017-04-19 | 2022-08-23 | 威海威高洁丽康生物材料有限公司 | Anchorage nail |
| CN108294838A (en) * | 2017-12-26 | 2018-07-20 | 苏州口腔医院有限公司 | One kind forcing down orthadontic appliance of going forward |
| CN113679441A (en) * | 2019-05-13 | 2021-11-23 | 深圳市立心科学有限公司 | Extrusion nail with anti-skid function |
| CN113679440A (en) * | 2019-05-13 | 2021-11-23 | 深圳市立心科学有限公司 | Interface extrusion nail |
| CN113679440B (en) * | 2019-05-13 | 2023-03-14 | 深圳市立心科学有限公司 | Interface extrusion nail |
| CN113679441B (en) * | 2019-05-13 | 2023-03-14 | 深圳市立心科学有限公司 | Extrusion nail with anti-skid function |
| CN111220371A (en) * | 2020-03-08 | 2020-06-02 | 哈尔滨理工大学 | Device for measuring maximum torque borne by vertical orthodontic anchorage nail and using method |
| CN111220371B (en) * | 2020-03-08 | 2021-07-09 | 哈尔滨理工大学 | Device for measuring maximum bearing torque of vertical orthodontic anchorage nail and using method |
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| Publication number | Publication date |
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| CN104622591B (en) | 2017-06-30 |
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