WO2004108006A1

WO2004108006A1 - A micro implant torque driver for lingual orthodontic treatment

Info

Publication number: WO2004108006A1
Application number: PCT/KR2003/002624
Authority: WO
Inventors: Hee Moon Kyung; Seong Min Bae; Hyo-Sang Park
Original assignee: Hee Moon Kyung; Seong Min Bae; Hyo-Sang Park
Priority date: 2003-06-11
Filing date: 2003-12-02
Publication date: 2004-12-16
Also published as: KR20040106155A; KR100541066B1; AU2003282455A1

Abstract

Our invention shall be related to the micro implant torque driver which will be available for orthodontic treatment. In orthodontic treatment, we will place a micro implant with titanium in an alveolar bone to secure an anchorage and will connect it with an elastic spring to move teeth to another space. But, as the micro implant placed in between teeth has very small size of 1.2mm~1.8mm compared with conventional prosthetic implant (approx 3mm), we would often find small screw broken (mainly body & head parts) in the event of an immoderate stress on the conventional driver. In order to solve such problem, we have developed new torque drivers as followings. The rotation fixer (3) held up by a ball (12) & spring (13) whose surface has a carved scale (21) shall be coupled with a nut shaft (4) with a stopper (9a) as well as a rotator (10) with an elastic wire (24) at its front-end, and this nut shaft shall be fitted in ratchet plates (6) (7) which revolve toward one side and a sleeve (2) with a stopper (9) touching a groove (8) at the ratchet plate (6) shall shield them. Torque adjusters (15) (16) of female screw type shall join together the male screw at the rear of a nut shaft (4) and a torque adjuster (16) shall be coupled with a supporter (21) with a groove (17) as fitted in the cap (20) holding up a ball (18) & spring (19). During placing a micro implant in an alveolar bone with a pair of ratchet plate held up by a spring in a contacted state each other, and in the event of an immoderate stress on the micro implant, ratchet plates which revolve toward one side only shall fall apart each other and spin free to avoid the breakage of micro implant in our new torque driver system.

Description

A Micro Implant Torque Driver for Lingual Orthodontic Treatment

TECHNICAL FIELD

This invention shall aim at developing the micro-implant torque driver which will be available for lingual orthodontic treatment

To explain it in detail, when we place a micro-implant(screw) into an alveolar bone, with the use of a driver, we would often find the implant broken(mainly body & head parts) frequently due to stressing the driver with the immoderate force which will cause0 excessive torque revolution.

In order to solve such problem, we have developed such a driver that a sleeve in the driver system can spin free with activities of a spring and ratchet plates which revolve one side only, in case excessive torque revolution force occurs. 5 BACKGROUND ART

In orthodontic treatment, we place a micro-implant with titanium in an alveolar bone to secure an anchorage and connect it with an elastic spring to move teeth to another space

As the micro-implant which shall be placed in between teeth has0 very small size of 1.2mm ~- 1.8mm in diameter compared with conventional prosthetic implant(size 3mm) and we would often the screw of such small size broken in the event of an immoderate stress on the driver. In conventional driver system as shown in FIG 1, a knob shall be inserted in a rotator and then a ball and spring put into a hole in a5 rotator and finally a nut will tighten them.

Such conventional driver has a weak point generally in screw breakage, because it depends on doctor's skill in using such driver and an immoderate stress on it would often bring out breaking an implant.

Such breakage will give as great difficulty to pull out the screw as well as a patient pain.

DISCLOSURE OF INVENTION

In improving the weak point of conventional driver, we have designed such a drive that a sleeve may spin free to avoid screw breakage at immoderate stress on the driver, and as the result our invention will enhance its efficiency highly

BRIEF DESCRIPTION OF DRAWINGS

FIG 1 : section drawing for conventional driver FIG 2 •' section drawing for new driver (invention) FIG 3 : piece drawings for new driver

THE EXPLANATION OF MARKS ABOUT PARTS OF DRAWING

1 : torque driver system

2 • sleeve

3 : rotation fixer

4 : nut shaft 6,7 : ratchet plate 8,14 : groove 9 , 9a : stopper 10 •' rotator 11 : nut

12 : ball

13, 23 : spring 15, 16 '• torque adjuster 20 • cap

21 : supporter

22 : scale.

24 : elastic wire

BEST MODE FOR CARRYING OUT THE INVENTION We would like to explain our micro implant driver system as followings according to relevant drawings as attached hereto.

An elastic wire(24) shall be fitted in a groove at front-end of a rotator

(10) in the driver(l) to protect the falling off of the implant( screw) inserted in the hexagonal groove. By virtue of tightening them by a nut(ll) following the insertion of a ball(12) and spring(13) into a hole at the rotation fixer(3), the ball supported by the spring and a groove(14) at the rear of a rotator(lθ) shall be contacted each other to avoid falling apart.

After inserting a nut shaft(4) in the rotation fixer whose surface has a carved scale(22) and then with setting them by plate, This nut shaft shall be coupled with ratchet plates(6)(7) in a contacted state with spring (23) which revolve one side only.

A sleeve(2)with a stopper (9) at its inside shall cap the rear of ratchet plate(7) with a groove(8) to shield a rotation fixer partly, a spring(23) and ratchet plates (6) (7).

The revolution forces o If the ratchet plates (6) (7) in a contacted state each other which revolve together with a sleeve shall be transmitted to a rotation fixer(3) and a rotator(lθ) by inserting a stopper(9a) at the nut shaft(4) into the groove(8a) of a ratchet ρlate(6). A male screw at the rear of the nut shaft fitted in a sleeve shall be capped with torque adjusters (15) (16) of female screw type which control a torque by loosing or tightening.

A ball (18) and spring (19) shall be inserted in a hole at the rear of the torque adjuster (16) to enable a cap (20) to hold up them, and then the ball (18) shall join together the groove(17) at a supporter (21).

We would Eke to explain an operation procedure about our micro implant driver as mentioned above regarding its system.

The elasticity of the spring(23) fitted in between a rotation fixer(3) and a ratchet plate(6) shall be adjusted to a scale(22) carved on the surface of a rotation fixer(3) in accordance with shear force of the micro implant (screw) which shall be available for orthodontic treatment.

A torque adjuster(lδ) capping a male screw shall be rotated, for its first adjustment, and then another torque adjuster(16) shall be also rotated and fixed to touch it(15) for the prevention against its loosing, which will bring out double tightening consequently.

After the control of the elasticity in a spring by torque adjusters (15) (16), a micro implant shall be inserted in a hexagonal groove at the front end of a rotator(lθ) and this inserted implant by virtue of an elastic wire (24) holding up it will not fall off easily. In case we revolve a sleeve (2) by means of grasping it with the thumb & second finger and with holding up a supporter(21) with the palm following the insertion of an implant in a rotator, the stopper(9) at a sleeve inside shall revolve automatically in a touched state with the groove(8) at a ratchet plate(7). At that time, a ratchet plate(6) linked to another ratchet plate(7) shall also revolve.

When a ratchet plate(6) revolves as above mentioned, by the activity of a stopper(9a) at a nut shaft(4) inserted in it(6), a rotator(lθ) held up by a spring (13) & ball(12) and a rotation fixer(3) shall revolve together with the nut shaft to place a micro implant in an alveolar bone. At the same time, torque adjusters(15)(16) linked to the rear of nut shaft also revolve together with them and in the mean time, by the help of 25 the ball(18) supported by a spring(19) which links to a groove(17), a supporter(21) will be able to carry out a supportive role to enable a sleeve(2), a rotation fixer(3) and a rotator(lθ) to revolve.

As the teeth of ratchet plates(6)(7) revolve one side only, we shall keep it in mind that they will be available for placing a micro implant in an alveolar bone.

As a ratchet plate(7) depending on the revolution force of the sleeve(2) which shall be revolved by the activities of a groove(8) and a stopper (9)revolves together with in a contacted state each other, another ratchet plate(6) held up by a spring(23) whose groove(8) inserted in the stopper(9a) of a nut shaft(4), in the event of stressing on the driver with an excessive force beyond specified force adjusted by torque adjusters(15)(16), the ratchet plates(6)(7) fall apart each other and as the result a sleeve(2) shall spin free to avoid such breakage of a screw.

INDUSTRIAL APPLICABILITY

As mentioned above, our invention will be available for orthodontic treatment. We have developed such a torque drive system that a pair of ratchet plate supported by a spring, which revolve toward one side only, may fall apart each other and spin free to avoid the breakage of its body or head in a micro implant in the event of stressing on the driver with excessive force more than the torque force of the micro implant during the placement of the implant in an alveolar bone.

Claims

1. The rotation fixer(3) whose surface has a carved scale(22) shall be coupled with a nut shaft(4) with a stopper(9a) as well as a rotator(lθ) and this nut shaft shall be linked to a pair of ratchet plate(6)(7) with each groove in a contacted state each other as well as a spring (23).

A sleeve(2) with a stopper©) touching a groove(8) at a ratchet plate(7) shall shield a rotation fixer partly, ratchet plates and a spring(23). Torque adjusters (15) (16) of female screw shall join together the male screw at the rear of a nut shaft, and a torque adjuster(16) shall be coupled with a supporter(21) with a groove(17) as fitted in the cap(20) holding up a ball(18) & spring(19).

This is micro Implant Torque Driver for Lingual Orthodontic Treatment characterized as mentioned above,